<?php
// Forza la visualizzazione degli errori
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

include('include/headscript.php');

// Connessione al database
$dbHandler = DBHandlerSelect::getInstance();
$pdo = $dbHandler->getConnection();

// Verifica che iduserlogin sia definito
if (!isset($iduserlogin)) {
    die("Errore: ID utente non definito.");
}

// Recupera i dati della scuola in base all'utente loggato
$stmt = $pdo->prepare("
    SELECT id, name, website, email, phone, description, address_street, address_city, address_postal_code, address_province, address_country, logo, status 
    FROM schools 
    WHERE owner_id = ?
");
$stmt->execute([$iduserlogin]);
$school = $stmt->fetch();
if (!$school) {
    die("Errore: Nessuna scuola trovata per l'utente loggato.");
}
$school_id = $school['id'];
$school_name = $school['name'];

// Recupera tutte le categorie disponibili
$stmt = $pdo->prepare("SELECT id, name FROM class_categories WHERE status = 'active' ORDER BY name");
$stmt->execute();
$categories = $stmt->fetchAll();

// Recupera tutti gli insegnanti della scuola
$stmt = $pdo->prepare("SELECT id, first_name, last_name FROM teachers WHERE user_id = ? AND status = 'active' ORDER BY first_name, last_name");
$stmt->execute([$iduserlogin]);
$teachers = $stmt->fetchAll();

// Funzione per ridimensionare l'immagine
function resizeImage($source_path, $dest_path, $max_width = 800)
{
    list($width, $height, $type) = getimagesize($source_path);
    if ($width <= $max_width) {
        copy($source_path, $dest_path);
        return;
    }

    $new_width = $max_width;
    $new_height = (int)(($height * $new_width) / $width);

    switch ($type) {
        case IMAGETYPE_JPEG:
            $source = imagecreatefromjpeg($source_path);
            break;
        case IMAGETYPE_PNG:
            $source = imagecreatefrompng($source_path);
            break;
        case IMAGETYPE_GIF:
            $source = imagecreatefromgif($source_path);
            break;
        default:
            throw new Exception("Formato immagine non supportato.");
    }

    $dest = imagecreatetruecolor($new_width, $new_height);
    if ($type == IMAGETYPE_PNG) {
        imagealphablending($dest, false);
        imagesavealpha($dest, true);
    }
    imagecopyresampled($dest, $source, 0, 0, 0, 0, $new_width, $new_height, $width, $height);

    switch ($type) {
        case IMAGETYPE_JPEG:
            imagejpeg($dest, $dest_path, 90);
            break;
        case IMAGETYPE_PNG:
            imagepng($dest, $dest_path);
            break;
        case IMAGETYPE_GIF:
            imagegif($dest, $dest_path);
            break;
    }

    imagedestroy($source);
    imagedestroy($dest);
}

// Gestione delle azioni (aggiunta, modifica, cancellazione)
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    if (isset($_POST['action'])) {
        $action = $_POST['action'];

        // Aggiunta di una nuova classe
        if ($action === 'add') {
            $category_id = $_POST['category_id'] ?? 0;
            $name = $_POST['name'] ?? '';
            $description = $_POST['description'] ?? null;
            $requirements = $_POST['requirements'] ?? null;
            $status = $_POST['status'] === 'active' ? 'active' : 'inactive';

            if (empty($name) || $category_id <= 0) {
                $error = "I campi obbligatori non sono stati compilati.";
            } else {
                $photo = null;
                if (isset($_FILES['photo']) && $_FILES['photo']['error'] === UPLOAD_ERR_OK) {
                    $file = $_FILES['photo'];
                    $timestamp = time();
                    $original_name = basename($file['name']);
                    $extension = strtolower(pathinfo($original_name, PATHINFO_EXTENSION));
                    $allowed_extensions = ['jpg', 'jpeg', 'png', 'gif'];

                    if (in_array($extension, $allowed_extensions)) {
                        $new_filename = "photoclass/{$school_id}-{$timestamp}-{$original_name}";
                        $temp_path = $file['tmp_name'];
                        try {
                            resizeImage($temp_path, $new_filename);
                            $photo = $new_filename;
                        } catch (Exception $e) {
                            $error = "Errore durante il ridimensionamento della foto: " . $e->getMessage();
                        }
                    } else {
                        $error = "Estensione del file non consentita. Usa JPG, JPEG, PNG o GIF.";
                    }
                }

                if (!isset($error)) {
                    $stmt = $pdo->prepare("
                        INSERT INTO classes (school_id, category_id, name, description, photo, requirements, status)
                        VALUES (?, ?, ?, ?, ?, ?, ?)
                    ");
                    $success = $stmt->execute([
                        $school_id,
                        $category_id,
                        $name,
                        $description,
                        $photo,
                        $requirements,
                        $status
                    ]);

                    if ($success) {
                        $success_message = "Classe aggiunta con successo!";
                    } else {
                        $error = "Errore durante l'aggiunta della classe.";
                    }
                }
            }
        }

        // Modifica di una classe esistente
        if ($action === 'edit') {
            $id = $_POST['id'] ?? 0;
            $category_id = $_POST['category_id'] ?? 0;
            $name = $_POST['name'] ?? '';
            $description = $_POST['description'] ?? null;
            $requirements = $_POST['requirements'] ?? null;
            $status = $_POST['status'] === 'active' ? 'active' : 'inactive';

            if (empty($name) || $category_id <= 0) {
                $error = "I campi obbligatori non sono stati compilati.";
            } else {
                // Recupera la classe esistente per ottenere il percorso della foto attuale
                $stmt = $pdo->prepare("SELECT photo FROM classes WHERE id = ? AND school_id = ?");
                $stmt->execute([$id, $school_id]);
                $class = $stmt->fetch();
                if (!$class) {
                    $error = "Classe non trovata.";
                } else {
                    $photo = $class['photo'];
                    if (isset($_FILES['photo']) && $_FILES['photo']['error'] === UPLOAD_ERR_OK) {
                        $file = $_FILES['photo'];
                        $timestamp = time();
                        $original_name = basename($file['name']);
                        $extension = strtolower(pathinfo($original_name, PATHINFO_EXTENSION));
                        $allowed_extensions = ['jpg', 'jpeg', 'png', 'gif'];

                        if (in_array($extension, $allowed_extensions)) {
                            $new_filename = "photoclass/{$school_id}-{$timestamp}-{$original_name}";
                            $temp_path = $file['tmp_name'];
                            try {
                                resizeImage($temp_path, $new_filename);
                                $photo = $new_filename;
                                if ($class['photo'] && file_exists($class['photo'])) {
                                    unlink($class['photo']);
                                }
                            } catch (Exception $e) {
                                $error = "Errore durante il ridimensionamento della foto: " . $e->getMessage();
                            }
                        } else {
                            $error = "Estensione del file non consentita. Usa JPG, JPEG, PNG o GIF.";
                        }
                    }

                    if (!isset($error)) {
                        $stmt = $pdo->prepare("
                            UPDATE classes 
                            SET category_id = ?, name = ?, description = ?, photo = ?, requirements = ?, status = ?
                            WHERE id = ? AND school_id = ?
                        ");
                        $success = $stmt->execute([
                            $category_id,
                            $name,
                            $description,
                            $photo,
                            $requirements,
                            $status,
                            $id,
                            $school_id
                        ]);

                        if ($success) {
                            $success_message = "Classe aggiornata con successo!";
                        } else {
                            $error = "Errore durante l'aggiornamento della classe.";
                        }
                    }
                }
            }
        }

        // Cancellazione di una classe
        if ($action === 'delete') {
            $id = $_POST['id'] ?? 0;
            $stmt = $pdo->prepare("SELECT photo FROM classes WHERE id = ? AND school_id = ?");
            $stmt->execute([$id, $school_id]);
            $class = $stmt->fetch();
            if ($class) {
                if ($class['photo'] && file_exists($class['photo'])) {
                    unlink($class['photo']);
                }
                $stmt = $pdo->prepare("DELETE FROM classes WHERE id = ? AND school_id = ?");
                $success = $stmt->execute([$id, $school_id]);

                if ($success) {
                    $success_message = "Classe eliminata con successo!";
                } else {
                    $error = "Errore durante l'eliminazione della classe.";
                }
            } else {
                $error = "Classe non trovata.";
            }
        }

        // Aggiunta di una variazione
        if ($action === 'add_variation') {
            $class_id = $_POST['class_id'] ?? 0;
            $level = in_array($_POST['level'], ['beginner', 'intermediate', 'advanced']) ? $_POST['level'] : 'beginner';
            $typical_duration = $_POST['typical_duration'] ? (int)$_POST['typical_duration'] : null;
            $max_capacity = $_POST['max_capacity'] ? (int)$_POST['max_capacity'] : 0;
            $day_of_week = in_array($_POST['day_of_week'], ['monday', 'tuesday', 'wednesday', 'thursday', 'friday', 'saturday', 'sunday']) ? $_POST['day_of_week'] : null;
            $start_time = $_POST['start_time'] ?? '';
            $room_name = $_POST['room_name'] ?? null;
            $notes = $_POST['notes'] ?? null;
            $status = $_POST['status'] === 'active' ? 'active' : 'inactive';

            if ($class_id <= 0 || empty($day_of_week) || empty($start_time)) {
                $error = "I campi obbligatori non sono stati compilati.";
            } else {
                $photo = null;
                if (isset($_FILES['photo']) && $_FILES['photo']['error'] === UPLOAD_ERR_OK) {
                    $file = $_FILES['photo'];
                    $timestamp = time();
                    $original_name = basename($file['name']);
                    $extension = strtolower(pathinfo($original_name, PATHINFO_EXTENSION));
                    $allowed_extensions = ['jpg', 'jpeg', 'png', 'gif'];

                    if (in_array($extension, $allowed_extensions)) {
                        $new_filename = "photoclass/{$school_id}-{$timestamp}-{$original_name}";
                        $temp_path = $file['tmp_name'];
                        try {
                            resizeImage($temp_path, $new_filename);
                            $photo = $new_filename;
                        } catch (Exception $e) {
                            $error = "Errore durante il ridimensionamento della foto: " . $e->getMessage();
                        }
                    } else {
                        $error = "Estensione del file non consentita. Usa JPG, JPEG, PNG o GIF.";
                    }
                }

                if (!isset($error)) {
                    $stmt = $pdo->prepare("
                        INSERT INTO class_types (class_id, school_id, level, typical_duration, max_capacity, day_of_week, start_time, room_name, notes, photo, status)
                        VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
                    ");
                    $success = $stmt->execute([
                        $class_id,
                        $school_id,
                        $level,
                        $typical_duration,
                        $max_capacity,
                        $day_of_week,
                        $start_time,
                        $room_name,
                        $notes,
                        $photo,
                        $status
                    ]);

                    if ($success) {
                        $success_message = "Variazione aggiunta con successo!";
                    } else {
                        $error = "Errore durante l'aggiunta della variazione.";
                    }
                }
            }
        }

        // Modifica di una variazione
        if ($action === 'edit_variation') {
            $id = $_POST['id'] ?? 0;
            $class_id = $_POST['class_id'] ?? 0;
            $level = in_array($_POST['level'], ['beginner', 'intermediate', 'advanced']) ? $_POST['level'] : 'beginner';
            $typical_duration = $_POST['typical_duration'] ? (int)$_POST['typical_duration'] : null;
            $max_capacity = $_POST['max_capacity'] ? (int)$_POST['max_capacity'] : 0;
            $day_of_week = in_array($_POST['day_of_week'], ['monday', 'tuesday', 'wednesday', 'thursday', 'friday', 'saturday', 'sunday']) ? $_POST['day_of_week'] : null;
            $start_time = $_POST['start_time'] ?? '';
            $room_name = $_POST['room_name'] ?? null;
            $notes = $_POST['notes'] ?? null;
            $status = $_POST['status'] === 'active' ? 'active' : 'inactive';

            if ($id <= 0 || $class_id <= 0 || empty($day_of_week) || empty($start_time)) {
                $error = "I campi obbligatori non sono stati compilati.";
            } else {
                // Recupera la variazione esistente per ottenere il percorso della foto attuale
                $stmt = $pdo->prepare("SELECT photo FROM class_types WHERE id = ? AND school_id = ? AND class_id = ?");
                $stmt->execute([$id, $school_id, $class_id]);
                $variation = $stmt->fetch();
                if (!$variation) {
                    $error = "Variazione non trovata.";
                } else {
                    $photo = $variation['photo'];
                    if (isset($_FILES['photo']) && $_FILES['photo']['error'] === UPLOAD_ERR_OK) {
                        $file = $_FILES['photo'];
                        $timestamp = time();
                        $original_name = basename($file['name']);
                        $extension = strtolower(pathinfo($original_name, PATHINFO_EXTENSION));
                        $allowed_extensions = ['jpg', 'jpeg', 'png', 'gif'];

                        if (in_array($extension, $allowed_extensions)) {
                            $new_filename = "photoclass/{$school_id}-{$timestamp}-{$original_name}";
                            $temp_path = $file['tmp_name'];
                            try {
                                resizeImage($temp_path, $new_filename);
                                $photo = $new_filename;
                                if ($variation['photo'] && file_exists($variation['photo'])) {
                                    unlink($variation['photo']);
                                }
                            } catch (Exception $e) {
                                $error = "Errore durante il ridimensionamento della foto: " . $e->getMessage();
                            }
                        } else {
                            $error = "Estensione del file non consentita. Usa JPG, JPEG, PNG o GIF.";
                        }
                    }

                    if (!isset($error)) {
                        $stmt = $pdo->prepare("
                            UPDATE class_types 
                            SET level = ?, typical_duration = ?, max_capacity = ?, day_of_week = ?, start_time = ?, room_name = ?, notes = ?, photo = ?, status = ?
                            WHERE id = ? AND school_id = ? AND class_id = ?
                        ");
                        $success = $stmt->execute([
                            $level,
                            $typical_duration,
                            $max_capacity,
                            $day_of_week,
                            $start_time,
                            $room_name,
                            $notes,
                            $photo,
                            $status,
                            $id,
                            $school_id,
                            $class_id
                        ]);

                        if ($success) {
                            $success_message = "Variazione aggiornata con successo!";
                        } else {
                            $error = "Errore durante l'aggiornamento della variazione.";
                        }
                    }
                }
            }
        }

        // Cancellazione di una variazione
        if ($action === 'delete_variation') {
            $id = $_POST['id'] ?? 0;
            $class_id = $_POST['class_id'] ?? 0;
            $stmt = $pdo->prepare("SELECT photo FROM class_types WHERE id = ? AND school_id = ? AND class_id = ?");
            $stmt->execute([$id, $school_id, $class_id]);
            $variation = $stmt->fetch();
            if ($variation) {
                if ($variation['photo'] && file_exists($variation['photo'])) {
                    unlink($variation['photo']);
                }
                $stmt = $pdo->prepare("DELETE FROM class_types WHERE id = ? AND school_id = ? AND class_id = ?");
                $success = $stmt->execute([$id, $school_id, $class_id]);

                if ($success) {
                    $success_message = "Variazione eliminata con successo!";
                } else {
                    $error = "Errore durante l'eliminazione della variazione.";
                }
            } else {
                $error = "Variazione non trovata.";
            }
        }

        // Assegnazione di un insegnante
        if ($action === 'assign_teacher') {
            $class_type_id = $_POST['class_type_id'] ?? 0;
            $teacher_id = !empty($_POST['teacher_id']) ? (int)$_POST['teacher_id'] : null;

            // Verifica che la variazione appartenga alla scuola
            $stmt = $pdo->prepare("SELECT id FROM class_types WHERE id = ? AND school_id = ?");
            $stmt->execute([$class_type_id, $school_id]);
            if (!$stmt->fetch()) {
                $error = "Variazione non trovata.";
            } else {
                // Se teacher_id è null, rimuoviamo l'assegnazione; altrimenti, assegniamo l'insegnante
                $stmt = $pdo->prepare("UPDATE class_types SET teacher_id = ? WHERE id = ?");
                $success = $stmt->execute([$teacher_id, $class_type_id]);

                if ($success) {
                    $success_message = "Insegnante assegnato con successo!";
                } else {
                    $error = "Errore durante l'assegnazione dell'insegnante.";
                }
            }
        }

        // Propagazione delle sessioni
        if ($action === 'propagate_sessions') {
            $class_type_id = $_POST['class_type_id'] ?? 0;
            $start_date = $_POST['start_date'] ?? '';
            $end_date = $_POST['end_date'] ?? '';

            // Validazione delle date
            if (empty($start_date) || empty($end_date)) {
                $error = "Le date di inizio e fine sono obbligatorie.";
            } elseif (strtotime($end_date) < strtotime($start_date)) {
                $error = "La data di fine non può essere precedente alla data di inizio.";
            } else {
                // Verifica che la variazione appartenga alla scuola
                $stmt = $pdo->prepare("
                SELECT ct.day_of_week, ct.start_time, ct.typical_duration, ct.teacher_id, ct.class_id, ct.school_id, ct.max_capacity, ct.notes 
                FROM class_types ct
                WHERE ct.id = ? AND ct.school_id = ?
            ");
                $stmt->execute([$class_type_id, $school_id]);
                $variation = $stmt->fetch();
                if (!$variation) {
                    $error = "Variazione non trovata.";
                } else {
                    // Recupera i giorni di chiusura della scuola
                    $stmt = $pdo->prepare("
                        SELECT start_date, end_date 
                        FROM day_off 
                        WHERE school_id = ? AND (
                            (start_date BETWEEN ? AND ?) OR 
                            (end_date BETWEEN ? AND ?) OR 
                            (start_date <= ? AND end_date >= ?)
                        )
                    ");
                    $stmt->execute([
                        $school_id,
                        $start_date,
                        $end_date,
                        $start_date,
                        $end_date,
                        $start_date,
                        $end_date
                    ]);
                    $days_off = $stmt->fetchAll();

                    // Crea un array di giorni di chiusura
                    $off_dates = [];
                    foreach ($days_off as $day_off) {
                        $current = new DateTime($day_off['start_date']);
                        $end = new DateTime($day_off['end_date']);
                        while ($current <= $end) {
                            $off_dates[] = $current->format('Y-m-d');
                            $current->modify('+1 day');
                        }
                    }

                    // Mappa i giorni della settimana per il confronto
                    $days_map = [
                        'monday' => 'Monday',
                        'tuesday' => 'Tuesday',
                        'wednesday' => 'Wednesday',
                        'thursday' => 'Thursday',
                        'friday' => 'Friday',
                        'saturday' => 'Saturday',
                        'sunday' => 'Sunday'
                    ];
                    $day_of_week_english = $days_map[$variation['day_of_week']];

                    // Calcola l'orario di fine
                    $start_time = new DateTime($variation['start_time']);
                    $end_time = clone $start_time;
                    if ($variation['typical_duration']) {
                        $end_time->modify("+{$variation['typical_duration']} minutes");
                    } else {
                        $end_time->modify("+60 minutes"); // Default: 1 ora se la durata non è specificata
                    }

                    // Genera un propagation_id univoco
                    $propagation_id = uniqid('prop_', true);

                    // Genera le sessioni
                    $current_date = new DateTime($start_date);
                    $end_date_dt = new DateTime($end_date);
                    $end_date_dt->setTime(23, 59, 59); // Include l'ultimo giorno

                    // Prepara la query per verificare se una sessione esiste già
                    $checkStmt = $pdo->prepare("
    SELECT id 
    FROM class_sessions 
    WHERE class_type_id = ? AND session_date = ?
");

                    // Prepara la query di inserimento
                    $stmt = $pdo->prepare("
    INSERT INTO class_sessions (class_id, school_id, class_type_id, session_date, start_time, end_time, teacher_id, max_capacity, notes, status, propagation_id)
    VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, 'scheduled', ?)
");

                    $sessions_created = 0;
                    $sessions_skipped = 0;
                    while ($current_date <= $end_date_dt) {
                        $day_of_week = $current_date->format('l');
                        $current_date_str = $current_date->format('Y-m-d');

                        if (!in_array($current_date_str, $off_dates) && $day_of_week === $day_of_week_english) {
                            $session_date = $current_date->format('Y-m-d');
                            $start_time_str = $start_time->format('H:i:s');
                            $end_time_str = $end_time->format('H:i:s');

                            // Verifica se una sessione esiste già per questa variazione e data
                            $checkStmt->execute([$class_type_id, $session_date]);
                            if ($checkStmt->fetch()) {
                                $sessions_skipped++;
                                continue; // Salta se esiste già
                            }

                            try {
                                $stmt->execute([
                                    $variation['class_id'],
                                    $variation['school_id'],
                                    $class_type_id,
                                    $session_date,
                                    $start_time_str,
                                    $end_time_str,
                                    $variation['teacher_id'],
                                    $variation['max_capacity'],
                                    $variation['notes'],
                                    $propagation_id
                                ]);
                                $sessions_created++;
                            } catch (PDOException $e) {
                                $error = "Errore durante la propagazione delle sessioni: " . $e->getMessage();
                                break;
                            }
                        }
                        $current_date->modify('+1 day');
                    }

                    if (!isset($error)) {
                        $success_message = "Propagate $sessions_created sessioni con successo! (Saltate $sessions_skipped sessioni già esistenti) (ID Propagazione: $propagation_id)";
                        echo "<script>
                            document.addEventListener('DOMContentLoaded', function() {
                                var successModalElement = document.getElementById('successPropagationModal');
                                var successModal = new bootstrap.Modal(successModalElement, { backdrop: true });
                                document.getElementById('successPropagationMessage').innerText = '$success_message';
                                successModal.show();
                                setTimeout(function() {
                                    successModal.hide();
                                    // Rimuove il backdrop manualmente
                                    document.querySelector('.modal-backdrop')?.remove();
                                    document.body.classList.remove('modal-open');
                                    document.body.style.overflow = 'auto'; // Ripristina lo scroll
                                    // Reindirizza dopo la chiusura del modale
                                    window.location.href = 'school_dashboard.php';
                                }, 3000); // Chiude il modale dopo 3 secondi
                            });
                        </script>";
                    }

                    if (!isset($error)) {
                        $success_message = "Propagate $sessions_created sessioni con successo! (ID Propagazione: $propagation_id)";
                        echo "<script>
                            document.addEventListener('DOMContentLoaded', function() {
                                var successModal = new bootstrap.Modal(document.getElementById('successPropagationModal'), {});
                                document.getElementById('successPropagationMessage').innerText = '$success_message';
                                successModal.show();
                            });
                        </script>";
                    }
                }
            }
        }

        // Rimozione di una propagazione
        if ($action === 'remove_propagation') {
            $propagation_id = $_POST['propagation_id'] ?? '';
            $class_type_id = $_POST['class_type_id'] ?? 0;

            if (empty($propagation_id) || $class_type_id <= 0) {
                $error = "ID di propagazione o variazione non validi.";
            } else {
                // Verifica che la variazione appartenga alla scuola
                $stmt = $pdo->prepare("SELECT id FROM class_types WHERE id = ? AND school_id = ?");
                $stmt->execute([$class_type_id, $school_id]);
                if (!$stmt->fetch()) {
                    $error = "Variazione non trovata.";
                } else {
                    // Elimina tutte le sessioni associate a questa propagazione
                    $stmt = $pdo->prepare("
                        DELETE FROM class_sessions 
                        WHERE propagation_id = ? AND class_type_id = ?
                    ");
                    $stmt->execute([$propagation_id, $class_type_id]);

                    $deleted_rows = $stmt->rowCount();
                    $success_message = "Propagazione rimossa con successo! ($deleted_rows sessioni eliminate)";
                }
            }
        }
        // Cancellazione di una sessione
        if ($action === 'delete_session') {
            $id = $_POST['id'] ?? 0;
            // Verifica che la sessione appartenga alla scuola
            $stmt = $pdo->prepare("
                SELECT cs.id 
                FROM class_sessions cs
                JOIN class_types ct ON cs.class_type_id = ct.id
                JOIN classes c ON ct.class_id = c.id
                WHERE cs.id = ? AND c.school_id = ?
            ");
            $stmt->execute([$id, $school_id]);
            if ($stmt->fetch()) {
                $stmt = $pdo->prepare("DELETE FROM class_sessions WHERE id = ?");
                $success = $stmt->execute([$id]);

                if ($success) {
                    $success_message = "Sessione eliminata con successo!";
                } else {
                    $error = "Errore durante l'eliminazione della sessione.";
                }
            } else {
                $error = "Sessione non trovata.";
            }
        }

        // Modifica di una sessione
        if ($action === 'edit_session') {
            $id = $_POST['id'] ?? 0;
            $class_type_id = $_POST['class_type_id'] ?? 0;
            $session_date = $_POST['session_date'] ?? '';
            $start_time = $_POST['start_time'] ?? '';
            $end_time = $_POST['end_time'] ?? '';
            $teacher_id = !empty($_POST['teacher_id']) ? (int)$_POST['teacher_id'] : null;
            $status = in_array($_POST['status'], ['scheduled', 'completed', 'cancelled']) ? $_POST['status'] : 'scheduled';

            if (empty($session_date) || empty($start_time) || empty($end_time)) {
                $error = "I campi obbligatori non sono stati compilati.";
            } elseif (strtotime($end_time) <= strtotime($start_time)) {
                $error = "L'orario di fine non può essere precedente o uguale all'orario di inizio.";
            } else {
                // Verifica che la sessione appartenga alla scuola
                $stmt = $pdo->prepare("
                    SELECT cs.id 
                    FROM class_sessions cs
                    JOIN class_types ct ON cs.class_type_id = ct.id
                    JOIN classes c ON ct.class_id = c.id
                    WHERE cs.id = ? AND c.school_id = ?
                ");
                $stmt->execute([$id, $school_id]);
                if (!$stmt->fetch()) {
                    $error = "Sessione non trovata.";
                } else {
                    $stmt = $pdo->prepare("
                        UPDATE class_sessions 
                        SET session_date = ?, start_time = ?, end_time = ?, teacher_id = ?, status = ?
                        WHERE id = ?
                    ");
                    $success = $stmt->execute([
                        $session_date,
                        $start_time,
                        $end_time,
                        $teacher_id,
                        $status,
                        $id
                    ]);

                    if ($success) {
                        $success_message = "Sessione aggiornata con successo!";
                    } else {
                        $error = "Errore durante l'aggiornamento della sessione.";
                    }
                }
            }
        }
        // Non Reindirizza per evitare il doppio invio del form

    }
}

// Recupera tutte le classi della scuola con le loro variazioni
$stmt = $pdo->prepare("
    SELECT c.*, cc.name AS category_name
    FROM classes c 
    LEFT JOIN class_categories cc ON c.category_id = cc.id 
    WHERE c.school_id = ? 
    ORDER BY c.created_at DESC
");
$stmt->execute([$school_id]);
$classes = $stmt->fetchAll();

// Recupera le variazioni per ogni classe
$class_variations = [];
foreach ($classes as $class) {
    $stmt = $pdo->prepare("
        SELECT ct.*, t.first_name AS teacher_first_name, t.last_name AS teacher_last_name
        FROM class_types ct
        LEFT JOIN teachers t ON ct.teacher_id = t.id
        WHERE ct.class_id = ? AND ct.school_id = ?
        ORDER BY ct.day_of_week, ct.start_time
    ");
    $stmt->execute([$class['id'], $school_id]);
    $class_variations[$class['id']] = $stmt->fetchAll();
}

// Recupera la data selezionata per le sessioni della giornata (default: oggi)
$selected_date = $_GET['session_date'] ?? date('Y-m-d');
$selected_date_dt = new DateTime($selected_date);
$day_of_week_english = $selected_date_dt->format('l'); // Giorno della settimana in inglese (es. Monday)

// Mappa i giorni della settimana per il confronto
$days_map_reverse = [
    'Monday' => 'monday',
    'Tuesday' => 'tuesday',
    'Wednesday' => 'wednesday',
    'Thursday' => 'thursday',
    'Friday' => 'friday',
    'Saturday' => 'saturday',
    'Sunday' => 'sunday'
];
$day_of_week = $days_map_reverse[$day_of_week_english];

// Recupera le sessioni per la data selezionata
$stmt = $pdo->prepare("
    SELECT cs.*, 
           ct.level, ct.day_of_week, ct.start_time, ct.room_name, ct.teacher_id,
           c.name AS class_name, c.photo AS class_photo,
           ct.photo AS variation_photo,
           t.first_name AS teacher_first_name, t.last_name AS teacher_last_name
    FROM class_sessions cs
    JOIN class_types ct ON cs.class_type_id = ct.id
    JOIN classes c ON ct.class_id = c.id
    LEFT JOIN teachers t ON cs.teacher_id = t.id
    WHERE cs.session_date = ? 
    AND ct.day_of_week = ?
    AND c.school_id = ?
    ORDER BY cs.start_time
");
$stmt->execute([$selected_date, $day_of_week, $school_id]);
$daily_sessions = $stmt->fetchAll();
?>

<!doctype html>
<html lang="en">

<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="icon" href="assets/images/favicon-32x32.png" type="image/png" />
    <?php include('cssinclude.php'); ?>
    <?php include('siteinfo.php'); ?>

</head>

<body>
    <div class="wrapper">
        <?php include('include/navbar.php'); ?>
        <?php include('include/topbar.php'); ?>
        <div class="page-wrapper">
            <div class="page-content">
                <!-- Sezione Informazioni Scuola -->
                <div class="card radius-10 mb-4">
                    <div class="card-body">
                        <div class="d-flex align-items-center">
                            <div class="me-4">
                                <img src="<?php echo $school['logo'] ? htmlspecialchars($school['logo']) : 'assets/images/default-school-logo.png'; ?>"
                                    alt="Logo Scuola" class="rounded-circle" style="width: 100px; height: 100px; object-fit: cover;">
                            </div>
                            <div class="flex-grow-1">
                                <h5 class="mb-1"><?php echo htmlspecialchars($school['name']); ?></h5>
                                <p class="mb-1">
                                    <strong>Indirizzo:</strong>
                                    <?php
                                    $address_parts = array_filter([
                                        $school['address_street'],
                                        $school['address_city'],
                                        $school['address_postal_code'],
                                        $school['address_province'],
                                        $school['address_country']
                                    ]);
                                    echo htmlspecialchars(implode(', ', $address_parts)) ?: 'Non specificato';
                                    ?>
                                </p>
                                <p class="mb-1"><strong>Email:</strong> <?php echo htmlspecialchars($school['email'] ?: 'Non specificato'); ?></p>
                                <p class="mb-1"><strong>Telefono:</strong> <?php echo htmlspecialchars($school['phone'] ?: 'Non specificato'); ?></p>
                                <p class="mb-1"><strong>Sito Web:</strong>
                                    <?php if ($school['website']): ?>
                                        <a href="<?php echo htmlspecialchars($school['website']); ?>" target="_blank"><?php echo htmlspecialchars($school['website']); ?></a>
                                    <?php else: ?>
                                        Non specificato
                                    <?php endif; ?>
                                </p>
                                <p class="mb-0"><strong>Descrizione:</strong> <?php echo htmlspecialchars($school['description'] ?: 'Non specificata'); ?></p>
                            </div>
                            <div>
                                <a href="school_profile.php" class="btn btn-primary">Modifica Profilo</a>
                            </div>
                        </div>
                    </div>
                </div>
                <!-- Sezione Pulsantiera -->
                <div class="row mb-4">
                    <div class="col-12">
                        <div class="d-flex flex-wrap justify-content-center gap-3">
                            <!-- Pulsante Situazione Clienti -->
                            <a href="#" class="btn btn-primary d-flex align-items-center px-3 py-2 shadow-sm rounded" style="min-width: 150px;">
                                <i class="bx bx-user me-2" style="font-size: 20px;"></i>
                                <span class="fs-6">Situazione Clienti</span>
                            </a>
                            <!-- Pulsante Ordini -->
                            <a href="orders.php" class="btn btn-success d-flex align-items-center px-3 py-2 shadow-sm rounded" style="min-width: 150px;">
                                <i class="bx bx-cart me-2" style="font-size: 20px;"></i>
                                <span class="fs-6">Ordini</span>
                            </a>
                            <!-- Pulsante Finanze -->
                            <a href="finances.php" class="btn btn-warning d-flex align-items-center px-3 py-2 shadow-sm rounded" style="min-width: 150px;">
                                <i class="bx bx-dollar me-2" style="font-size: 20px;"></i>
                                <span class="fs-6">Finanze</span>
                            </a>
                            <a href="products.php" class="btn btn-dark d-flex align-items-center px-3 py-2 shadow-sm rounded" style="min-width: 150px;">
                                <i class="bx bx-package me-2" style="font-size: 20px;"></i>
                                <span class="fs-6">Prodotti</span>
                            </a>
                            <!-- Pulsante Abbonamenti -->
                            <a href="#" class="btn btn-info d-flex align-items-center px-3 py-2 shadow-sm rounded" style="min-width: 150px;">
                                <i class="bx bx-calendar me-2" style="font-size: 20px;"></i>
                                <span class="fs-6">Abbonamenti</span>
                            </a>
                            <!-- Pulsante Day Off -->
                            <a href="day_off.php" class="btn btn-danger d-flex align-items-center px-3 py-2 shadow-sm rounded" style="min-width: 150px;">
                                <i class="bx bx-calendar-x me-2" style="font-size: 20px;"></i>
                                <span class="fs-6">Giorni di Chiusura</span>
                            </a>
                            <!-- Pulsante Impostazioni -->
                            <a href="school_settings.php" class="btn btn-dark d-flex align-items-center px-3 py-2 shadow-sm rounded" style="min-width: 150px;">
                                <i class="bx bx-cog me-2" style="font-size: 20px;"></i>
                                <span class="fs-6">Impostazioni</span>
                            </a>
                        </div>
                    </div>
                </div>

                <!-- Sezione Classi -->
                <div class="card radius-10">
                    <div class="card-header">
                        <div class="d-flex align-items-center">
                            <div>
                                <h6 class="mb-0">Classi della scuola</h6>
                            </div>
                            <div class="ms-auto">
                                <button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addClassModal">
                                    Aggiungi Classe
                                </button>
                            </div>
                        </div>
                    </div>
                    <div class="card-body">
                        <?php if (isset($error)): ?>
                            <div class="alert alert-danger" role="alert">
                                <?php echo $error; ?>
                            </div>
                        <?php endif; ?>
                        <div class="table-responsive">
                            <table id="classesTable" class="table table-striped table-bordered">
                                <thead>
                                    <tr>
                                        <th></th> <!-- Colonna per il pulsante collassabile -->
                                        <th>Categoria</th>
                                        <th>Nome</th>
                                        <th>Descrizione</th>
                                        <th>Foto</th>
                                        <th>Stato</th>
                                        <th>Azioni</th>
                                    </tr>
                                </thead>
                                <tbody>
                                    <?php foreach ($classes as $class): ?>
                                        <!-- Riga della classe generale -->
                                        <tr>
                                            <td>
                                                <button class="btn btn-sm btn-outline-primary toggle-variations" type="button" data-bs-toggle="collapse" data-bs-target="#variations-<?php echo $class['id']; ?>" aria-expanded="false" aria-controls="variations-<?php echo $class['id']; ?>">
                                                    <i class="bx bx-chevron-down toggle-icon"></i>
                                                </button>
                                            </td>
                                            <td><?php echo htmlspecialchars($class['category_name']); ?></td>
                                            <td><?php echo htmlspecialchars($class['name']); ?></td>
                                            <td><?php echo htmlspecialchars($class['description'] ?? ''); ?></td>
                                            <td>
                                                <?php if ($class['photo']): ?>
                                                    <img src="<?php echo htmlspecialchars($class['photo']); ?>" alt="Foto Classe" style="max-width: 50px; max-height: 50px;">
                                                <?php else: ?>
                                                    Nessuna foto
                                                <?php endif; ?>
                                            </td>
                                            <td>
                                                <span class="badge <?php echo $class['status'] === 'active' ? 'bg-success' : 'bg-danger'; ?>">
                                                    <?php echo $class['status'] === 'active' ? 'Attivo' : 'Inattivo'; ?>
                                                </span>
                                            </td>

                                            <td>
                                                <button type="button" class="btn btn-sm btn-warning" data-bs-toggle="modal" data-bs-target="#editClassModal"
                                                    onclick='fillEditModal(<?php echo json_encode([
                                                                                "id" => $class['id'],
                                                                                "category_id" => $class['category_id'],
                                                                                "name" => htmlspecialchars($class['name'], ENT_QUOTES),
                                                                                "description" => htmlspecialchars($class['description'] ?? '', ENT_QUOTES),
                                                                                "requirements" => htmlspecialchars($class['requirements'] ?? '', ENT_QUOTES),
                                                                                "status" => $class['status']
                                                                            ]); ?>)'
                                                    data-bs-toggle="tooltip" data-bs-placement="top" title="Modifica">
                                                    <i class="bx bx-edit"></i>
                                                </button>
                                                <form action="" method="POST" style="display:inline;" onsubmit="return confirm('Sei sicuro di voler eliminare questa classe?');">
                                                    <input type="hidden" name="action" value="delete">
                                                    <input type="hidden" name="id" value="<?php echo $class['id']; ?>">
                                                    <button type="submit" class="btn btn-sm btn-danger" data-bs-toggle="tooltip" data-bs-placement="top" title="Elimina">
                                                        <i class="bx bx-trash"></i>
                                                    </button>
                                                </form>
                                                <button type="button" class="btn btn-sm btn-primary" data-bs-toggle="modal" data-bs-target="#addVariationModal"
                                                    onclick='fillAddVariationModal(<?php echo json_encode([
                                                                                        "class_id" => $class['id']
                                                                                    ]); ?>)'
                                                    data-bs-toggle="tooltip" data-bs-placement="top" title="Aggiungi Variazione">
                                                    <i class="bx bx-plus"></i> Variazione
                                                </button>
                                            </td>
                                        </tr>
                                        <!-- Riga collassabile per le variazioni -->
                                        <tr>
                                            <td colspan="7" class="p-0">
                                                <div class="collapse" id="variations-<?php echo $class['id']; ?>">
                                                    <div class="card card-body border-0">
                                                        <?php if (empty($class_variations[$class['id']])): ?>
                                                            <p class="text-muted mb-0">Nessuna variazione disponibile per questa classe.</p>
                                                        <?php else: ?>
                                                            <div class="table-responsive">
                                                                <table class="table table-bordered mb-0">
                                                                    <thead>
                                                                        <tr>
                                                                            <th>Livello</th>
                                                                            <th>Durata (min)</th>
                                                                            <th>Posti Massimi</th>
                                                                            <th>Giorno</th>
                                                                            <th>Orario</th>
                                                                            <th>Sala</th>
                                                                            <th>Insegnante</th>
                                                                            <th>Stato</th>
                                                                            <th>Prenotati</th>
                                                                            <th>Azioni</th>
                                                                        </tr>
                                                                    </thead>
                                                                    <tbody>
                                                                        <?php foreach ($class_variations[$class['id']] as $variation): ?>
                                                                            <tr>
                                                                                <td><?php echo htmlspecialchars($variation['level']); ?></td>
                                                                                <td><?php echo htmlspecialchars($variation['typical_duration'] ?? ''); ?></td>
                                                                                <td><?php echo htmlspecialchars($variation['max_capacity']); ?></td>
                                                                                <td><?php echo htmlspecialchars(ucfirst($variation['day_of_week'])); ?></td>
                                                                                <td><?php echo htmlspecialchars($variation['start_time']); ?></td>
                                                                                <td><?php echo htmlspecialchars($variation['room_name'] ?? 'Non specificata'); ?></td>
                                                                                <td>
                                                                                    <?php if ($variation['teacher_id']): ?>
                                                                                        <button type="button" class="btn btn-sm btn-info" data-bs-toggle="modal" data-bs-target="#assignTeacherModal"
                                                                                            onclick='fillAssignTeacherModal(<?php echo json_encode([
                                                                                                                                "class_type_id" => $variation['id'],
                                                                                                                                "teacher_id" => $variation['teacher_id']
                                                                                                                            ]); ?>)'>
                                                                                            <?php echo htmlspecialchars($variation['teacher_first_name'] . ' ' . $variation['teacher_last_name']); ?>
                                                                                        </button>
                                                                                    <?php else: ?>
                                                                                        <button type="button" class="btn btn-sm btn-secondary" data-bs-toggle="modal" data-bs-target="#assignTeacherModal"
                                                                                            onclick='fillAssignTeacherModal(<?php echo json_encode([
                                                                                                                                "class_type_id" => $variation['id'],
                                                                                                                                "teacher_id" => null
                                                                                                                            ]); ?>)'>
                                                                                            Non assegnato
                                                                                        </button>
                                                                                    <?php endif; ?>
                                                                                </td>
                                                                                <td>
                                                                                    <span class="badge <?php echo $variation['status'] === 'active' ? 'bg-success' : 'bg-danger'; ?>">
                                                                                        <?php echo $variation['status'] === 'active' ? 'Attivo' : 'Inattivo'; ?>
                                                                                    </span>
                                                                                </td>
                                                                                <td>
                                                                                    <button type="button" class="btn btn-sm btn-warning" data-bs-toggle="modal" data-bs-target="#editVariationModal"
                                                                                        onclick='fillEditVariationModal(<?php echo json_encode([
                                                                                                                            "id" => $variation['id'],
                                                                                                                            "class_id" => $variation['class_id'],
                                                                                                                            "level" => $variation['level'],
                                                                                                                            "typical_duration" => $variation['typical_duration'] ?? '',
                                                                                                                            "max_capacity" => $variation['max_capacity'],
                                                                                                                            "day_of_week" => $variation['day_of_week'],
                                                                                                                            "start_time" => $variation['start_time'],
                                                                                                                            "room_name" => htmlspecialchars($variation['room_name'] ?? '', ENT_QUOTES),
                                                                                                                            "notes" => htmlspecialchars($variation['notes'] ?? '', ENT_QUOTES),
                                                                                                                            "status" => $variation['status']
                                                                                                                        ]); ?>)'
                                                                                        data-bs-toggle="tooltip" data-bs-placement="top" title="Modifica">
                                                                                        <i class="bx bx-edit"></i>
                                                                                    </button>
                                                                                    <form action="" method="POST" style="display:inline;" onsubmit="return confirm('Sei sicuro di voler eliminare questa variazione?');">
                                                                                        <input type="hidden" name="action" value="delete_variation">
                                                                                        <input type="hidden" name="id" value="<?php echo $variation['id']; ?>">
                                                                                        <input type="hidden" name="class_id" value="<?php echo $variation['class_id']; ?>">
                                                                                        <button type="submit" class="btn btn-sm btn-danger" data-bs-toggle="tooltip" data-bs-placement="top" title="Elimina">
                                                                                            <i class="bx bx-trash"></i>
                                                                                        </button>
                                                                                    </form>
                                                                                    <button type="button" class="btn btn-sm btn-success" data-bs-toggle="modal" data-bs-target="#propagateClassModal"
                                                                                        onclick='fillPropagateModal(<?php echo json_encode([
                                                                                                                        "class_type_id" => $variation['id']
                                                                                                                    ]); ?>)'
                                                                                        data-bs-toggle="tooltip" data-bs-placement="top" title="Propaga">
                                                                                        <i class="bx bx-broadcast"></i> Propaga
                                                                                    </button>
                                                                                    <button type="button" class="btn btn-sm btn-danger" data-bs-toggle="modal" data-bs-target="#removePropagationModal"
                                                                                        onclick='fillRemovePropagationModal(<?php echo json_encode([
                                                                                                                                "class_type_id" => $variation['id']
                                                                                                                            ]); ?>)'
                                                                                        data-bs-toggle="tooltip" data-bs-placement="top" title="Rimuovi Propagazione">
                                                                                        <i class="bx bx-undo"></i>
                                                                                    </button>
                                                                                    <a href="class_sessions.php?class_type_id=<?php echo $variation['id']; ?>" class="btn btn-sm btn-primary" data-bs-toggle="tooltip" data-bs-placement="top" title="Lezioni">
                                                                                        <i class="bx bx-calendar-event"></i>
                                                                                    </a>
                                                                                </td>
                                                                            </tr>
                                                                        <?php endforeach; ?>
                                                                    </tbody>
                                                                </table>
                                                            </div>
                                                        <?php endif; ?>
                                                    </div>
                                                </div>
                                            </td>
                                        </tr>
                                    <?php endforeach; ?>
                                </tbody>
                            </table>
                        </div>
                    </div>
                </div>
                <!-- Sezione Sessioni (Singolo giorno o Intervallo) -->
                <div class="card radius-10 mb-4">
                    <div class="card-header">
                        <div class="d-flex align-items-center justify-content-between">
                            <h6 class="mb-0">Sessioni Programmata</h6>
                            <div class="d-flex gap-2">
                                <!-- I tuoi filtri data esistenti -->
                                <form action="" method="GET" class="d-flex flex-wrap align-items-center gap-2">
                                    <div class="d-flex align-items-center gap-2">
                                        <label class="me-2 mb-0 text-nowrap">Dal:</label>
                                        <input type="date" name="start_date" class="form-control form-control-sm" value="<?php echo $_GET['start_date'] ?? date('Y-m-d'); ?>" required>
                                    </div>
                                    <div class="d-flex align-items-center gap-2">
                                        <label class="me-2 mb-0 text-nowrap">Al:</label>
                                        <input type="date" name="end_date" class="form-control form-control-sm" value="<?php echo $_GET['end_date'] ?? ''; ?>">
                                    </div>
                                    <button type="submit" class="btn btn-primary btn-sm">Mostra</button>
                                    <?php if (isset($_GET['start_date'])): ?>
                                        <a href="?" class="btn btn-outline-secondary btn-sm">Oggi</a>
                                    <?php endif; ?>
                                </form>

                                <!-- PULSANTE CALENDARIO -->
                                <button type="button" class="btn btn-success btn-sm" data-bs-toggle="modal" data-bs-target="#calendarModal">
                                    <i class="bx bx-calendar"></i> Vista Calendario
                                </button>
                            </div>
                        </div>
                    </div>
                    <div class="card-body">
                        <?php
                        // Determina le date da mostrare
                        $start_date = $_GET['start_date'] ?? date('Y-m-d');
                        $end_date = $_GET['end_date'] ?? $start_date;

                        if ($end_date < $start_date) {
                            echo '<div class="alert alert-warning">La data di fine non può essere precedente alla data di inizio.</div>';
                            $end_date = $start_date;
                        }

                        // Recupera tutte le sessioni nell'intervallo
                        // === NUOVA QUERY CON CONTEGGIO E LISTA PRENOTATI ===
                        $stmt = $pdo->prepare("
    SELECT 
        cs.*,
        ct.level, ct.day_of_week, ct.start_time AS ct_start_time, ct.room_name, ct.teacher_id,
        c.name AS class_name, c.photo AS class_photo,
        ct.photo AS variation_photo,
        t.first_name AS teacher_first_name, t.last_name AS teacher_last_name,
        
        -- Contiamo gli studenti prenotati (solo booked, attended, rescheduled)
        (SELECT COUNT(*) 
         FROM session_bookings sb 
         WHERE sb.session_id = cs.id 
           AND sb.status IN ('booked', 'attended', 'rescheduled')
        ) AS booked_count,
        
        -- Capacità massima (da class_sessions o da class_types se null)
        COALESCE(cs.max_capacity, ct.max_capacity, 0) AS effective_capacity,
        
        -- Lista studenti prenotati (per il modale)
        (SELECT GROUP_CONCAT(
            CONCAT(au.first_name, ' ', au.last_name, '|', au.email, '|', COALESCE(au.phone, ''))
            SEPARATOR ';;;'
         )
         FROM session_bookings sb
         JOIN auth_users au ON sb.user_id = au.id
         WHERE sb.session_id = cs.id 
           AND sb.status IN ('booked', 'attended', 'rescheduled')
        ) AS booked_students
    FROM class_sessions cs
    JOIN class_types ct ON cs.class_type_id = ct.id
    JOIN classes c ON ct.class_id = c.id
    LEFT JOIN teachers t ON cs.teacher_id = t.id
    WHERE cs.session_date BETWEEN ? AND ?
      AND c.school_id = ?
    ORDER BY cs.session_date, cs.start_time
");
                        $stmt->execute([$start_date, $end_date, $school_id]);
                        $range_sessions = $stmt->fetchAll();
                        ?>

                        <div class="mb-3">
                            <strong>
                                <?php if ($start_date === $end_date): ?>
                                    Sessioni del <span class="text-primary"><?php echo date('d/m/Y', strtotime($start_date)); ?></span>
                                <?php else: ?>
                                    Sessioni dal <span class="text-primary"><?php echo date('d/m/Y', strtotime($start_date)); ?></span>
                                    al <span class="text-primary"><?php echo date('d/m/Y', strtotime($end_date)); ?></span>
                                    (<?php echo count($range_sessions); ?> totali)
                                <?php endif; ?>
                            </strong>
                        </div>

                        <div class="table-responsive">
                            <table id="dailySessionsTable" class="table table-striped table-bordered">
                                <thead>
                                    <tr>
                                        <th>Data</th>
                                        <th>Classe</th>
                                        <th>Livello</th>
                                        <th>Orario</th>
                                        <th>Sala</th>
                                        <th>Insegnante</th>
                                        <th>Stato</th>
                                        <th>Prenotati</th>
                                        <th>Azioni</th>
                                    </tr>
                                </thead>
                                <tbody>
                                    <?php if (empty($range_sessions)): ?>
                                        <tr>
                                            <td colspan="8" class="text-center text-muted">
                                                Nessuna sessione programmata in questo intervallo.
                                            </td>
                                        </tr>
                                    <?php else: ?>
                                        <?php
                                        $current_date = '';
                                        foreach ($range_sessions as $session):
                                            $session_date = $session['session_date'];
                                            if ($session_date !== $current_date):
                                                $current_date = $session_date;
                                        ?>
                                                <tr class="table-info">
                                                    <td colspan="8" class="fw-bold text-dark">
                                                        <?php echo date('d/m/Y (l)', strtotime($session_date)); ?>
                                                    </td>
                                                </tr>
                                            <?php endif; ?>
                                            <tr>
                                                <td><?php echo date('d/m', strtotime($session_date)); ?></td>
                                                <td><?php echo htmlspecialchars($session['class_name']); ?></td>
                                                <td><?php echo ucfirst($session['level']); ?></td>
                                                <td><?php echo substr($session['start_time'], 0, 5); ?> - <?php echo substr($session['end_time'], 0, 5); ?></td>
                                                <td><?php echo htmlspecialchars($session['room_name'] ?? '—'); ?></td>
                                                <td>
                                                    <?php echo $session['teacher_id'] ? htmlspecialchars($session['teacher_first_name'] . ' ' . $session['teacher_last_name']) : '<em>Non assegnato</em>'; ?>
                                                </td>
                                                <td>
                                                    <span class="badge <?php
                                                                        echo $session['status'] === 'scheduled' ? 'bg-info' : ($session['status'] === 'completed' ? 'bg-success' : 'bg-danger');
                                                                        ?>">
                                                        <?php echo $session['status'] === 'scheduled' ? 'Programmata' : ($session['status'] === 'completed' ? 'Completata' : 'Annullata'); ?>
                                                    </span>
                                                </td>
                                                <td>
                                                    <?php
                                                    $booked = $session['booked_count'];
                                                    $capacity = $session['effective_capacity'] > 0 ? $session['effective_capacity'] : '∞';
                                                    $color = ($capacity !== '∞' && $booked >= $capacity) ? 'danger' : 'success';
                                                    ?>
                                                    <button type="button" class="btn btn-sm btn-<?php echo $color; ?> position-relative"
                                                        data-bs-toggle="modal" data-bs-target="#studentsModal-<?php echo $session['id']; ?>">
                                                        <?php echo $booked; ?> / <?php echo $capacity; ?>
                                                        <?php if ($booked > 0): ?>
                                                            <span class="position-absolute top-0 start-100 translate-middle badge rounded-pill bg-dark">
                                                                <?php echo $booked; ?>
                                                                <span class="visually-hidden">prenotati</span>
                                                            </span>
                                                        <?php endif; ?>
                                                    </button>
                                                </td>
                                                <td>
                                                    <button type="button" class="btn btn-sm btn-warning" data-bs-toggle="modal" data-bs-target="#editSessionModal"
                                                        onclick='fillEditSessionModal(<?php echo json_encode([
                                                                                            "id" => $session['id'],
                                                                                            "class_type_id" => $session['class_type_id'],
                                                                                            "session_date" => $session['session_date'],
                                                                                            "start_time" => $session['start_time'],
                                                                                            "end_time" => $session['end_time'],
                                                                                            "teacher_id" => $session['teacher_id'],
                                                                                            "status" => $session['status']
                                                                                        ]); ?>)'>
                                                        <i class="bx bx-edit"></i>
                                                    </button>
                                                    <form action="" method="POST" style="display:inline;" onsubmit="return confirm('Eliminare questa sessione?');">
                                                        <input type="hidden" name="action" value="delete_session">
                                                        <input type="hidden" name="id" value="<?php echo $session['id']; ?>">
                                                        <button type="submit" class="btn btn-sm btn-danger">
                                                            <i class="bx bx-trash"></i>
                                                        </button>
                                                    </form>
                                                </td>
                                            </tr>
                                        <?php endforeach; ?>
                                    <?php endif; ?>
                                </tbody>
                            </table>
                        </div>
                    </div>
                </div>

                <!-- Spazio per future sezioni -->
                <!-- Puoi aggiungere altre sezioni qui sotto, come statistiche, eventi, ecc. -->
            </div>
        </div>

        <!-- Modale per aggiungere una classe -->
        <div class="modal fade" id="addClassModal" tabindex="-1" aria-labelledby="addClassModalLabel" aria-hidden="true">
            <div class="modal-dialog modal-lg">
                <div class="modal-content">
                    <div class="modal-header">
                        <h5 class="modal-title" id="addClassModalLabel">Aggiungi Classe</h5>
                        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
                    </div>
                    <form action="" method="POST" enctype="multipart/form-data">
                        <div class="modal-body">
                            <input type="hidden" name="action" value="add">
                            <div class="row">
                                <div class="col-md-6 mb-3">
                                    <label for="add_category_id" class="form-label">Categoria</label>
                                    <select class="form-control" id="add_category_id" name="category_id" required>
                                        <option value="">Seleziona una categoria</option>
                                        <?php foreach ($categories as $category): ?>
                                            <option value="<?php echo $category['id']; ?>"><?php echo htmlspecialchars($category['name']); ?></option>
                                        <?php endforeach; ?>
                                    </select>
                                </div>
                                <div class="col-md-6 mb-3">
                                    <label for="add_name" class="form-label">Nome</label>
                                    <input type="text" class="form-control" id="add_name" name="name" required>
                                </div>
                            </div>
                            <div class="mb-3">
                                <label for="add_description" class="form-label">Descrizione</label>
                                <textarea class="form-control" id="add_description" name="description" rows="3"></textarea>
                            </div>
                            <div class="mb-3">
                                <label for="add_photo" class="form-label">Foto</label>
                                <input type="file" class="form-control" id="add_photo" name="photo" accept="image/*">
                            </div>
                            <div class="mb-3">
                                <label for="add_requirements" class="form-label">Requisiti</label>
                                <textarea class="form-control" id="add_requirements" name="requirements" rows="2"></textarea>
                            </div>
                            <div class="mb-3">
                                <label for="add_status" class="form-label">Stato</label>
                                <div class="form-check form-switch">
                                    <input class="form-check-input" type="checkbox" id="add_status" name="status" value="active" checked>
                                    <label class="form-check-label" for="add_status">Attivo</label>
                                </div>
                            </div>
                        </div>
                        <div class="modal-footer">
                            <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Chiudi</button>
                            <button type="submit" class="btn btn-primary">Aggiungi</button>
                        </div>
                    </form>
                </div>
            </div>
        </div>

        <!-- Modale per modificare una classe -->
        <div class="modal fade" id="editClassModal" tabindex="-1" aria-labelledby="editClassModalLabel" aria-hidden="true">
            <div class="modal-dialog modal-lg">
                <div class="modal-content">
                    <div class="modal-header">
                        <h5 class="modal-title" id="editClassModalLabel">Modifica Classe</h5>
                        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
                    </div>
                    <form action="" method="POST" enctype="multipart/form-data">
                        <div class="modal-body">
                            <input type="hidden" name="action" value="edit">
                            <input type="hidden" name="id" id="edit_id">
                            <div class="row">
                                <div class="col-md-6 mb-3">
                                    <label for="edit_category_id" class="form-label">Categoria</label>
                                    <select class="form-control" id="edit_category_id" name="category_id" required>
                                        <option value="">Seleziona una categoria</option>
                                        <?php foreach ($categories as $category): ?>
                                            <option value="<?php echo $category['id']; ?>"><?php echo htmlspecialchars($category['name']); ?></option>
                                        <?php endforeach; ?>
                                    </select>
                                </div>
                                <div class="col-md-6 mb-3">
                                    <label for="edit_name" class="form-label">Nome</label>
                                    <input type="text" class="form-control" id="edit_name" name="name" required>
                                </div>
                            </div>
                            <div class="mb-3">
                                <label for="edit_description" class="form-label">Descrizione</label>
                                <textarea class="form-control" id="edit_description" name="description" rows="3"></textarea>
                            </div>
                            <div class="mb-3">
                                <label for="edit_photo" class="form-label">Foto</label>
                                <input type="file" class="form-control" id="edit_photo" name="photo" accept="image/*">
                            </div>
                            <div class="mb-3">
                                <label for="edit_requirements" class="form-label">Requisiti</label>
                                <textarea class="form-control" id="edit_requirements" name="requirements" rows="2"></textarea>
                            </div>
                            <div class="mb-3">
                                <label for="edit_status" class="form-label">Stato</label>
                                <div class="form-check form-switch">
                                    <input class="form-check-input" type="checkbox" id="edit_status" name="status" value="active">
                                    <label class="form-check-label" for="edit_status">Attivo</label>
                                </div>
                            </div>
                        </div>
                        <div class="modal-footer">
                            <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Chiudi</button>
                            <button type="submit" class="btn btn-primary">Salva Modifiche</button>
                        </div>
                    </form>
                </div>
            </div>
        </div>

        <!-- Modale per assegnare un insegnante -->
        <div class="modal fade" id="assignTeacherModal" tabindex="-1" aria-labelledby="assignTeacherModalLabel" aria-hidden="true">
            <div class="modal-dialog">
                <div class="modal-content">
                    <div class="modal-header">
                        <h5 class="modal-title" id="assignTeacherModalLabel">Assegna Insegnante</h5>
                        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
                    </div>
                    <form action="" method="POST">
                        <div class="modal-body">
                            <input type="hidden" name="action" value="assign_teacher">
                            <input type="hidden" name="class_type_id" id="assign_class_type_id">
                            <div class="mb-3">
                                <label for="assign_teacher_id" class="form-label">Seleziona Insegnante</label>
                                <select class="form-control" id="assign_teacher_id" name="teacher_id">
                                    <option value="">Nessun insegnante (Non assegnato)</option>
                                    <?php foreach ($teachers as $teacher): ?>
                                        <option value="<?php echo $teacher['id']; ?>">
                                            <?php echo htmlspecialchars($teacher['first_name'] . ' ' . $teacher['last_name']); ?>
                                        </option>
                                    <?php endforeach; ?>
                                </select>
                            </div>
                        </div>
                        <div class="modal-footer">
                            <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Chiudi</button>
                            <button type="submit" class="btn btn-primary">Assegna</button>
                        </div>
                    </form>
                </div>
            </div>
        </div>

        <!-- Modale per propagare le sessioni -->
        <div class="modal fade" id="propagateClassModal" tabindex="-1" aria-labelledby="propagateClassModalLabel" aria-hidden="true">
            <div class="modal-dialog">
                <div class="modal-content">
                    <div class="modal-header">
                        <h5 class="modal-title" id="propagateClassModalLabel">Propaga Sessioni</h5>
                        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
                    </div>
                    <form action="" method="POST">
                        <div class="modal-body">
                            <input type="hidden" name="action" value="propagate_sessions">
                            <input type="hidden" name="class_type_id" id="propagate_class_type_id">
                            <div class="mb-3">
                                <label for="propagate_start_date" class="form-label">Data Inizio</label>
                                <input type="date" class="form-control" id="propagate_start_date" name="start_date" required>
                            </div>
                            <div class="mb-3">
                                <label for="propagate_end_date" class="form-label">Data Fine</label>
                                <input type="date" class="form-control" id="propagate_end_date" name="end_date" required>
                            </div>
                        </div>
                        <div class="modal-footer">
                            <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Chiudi</button>
                            <button type="submit" class="btn btn-success">Propaga</button>
                        </div>
                    </form>
                </div>
            </div>
        </div>
        <!-- Modale per rimuovere una propagazione -->
        <div class="modal fade" id="removePropagationModal" tabindex="-1" aria-labelledby="removePropagationModalLabel" aria-hidden="true">
            <div class="modal-dialog">
                <div class="modal-content">
                    <div class="modal-header">
                        <h5 class="modal-title" id="removePropagationModalLabel">Rimuovi Propagazione</h5>
                        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
                    </div>
                    <form action="" method="POST">
                        <div class="modal-body">
                            <input type="hidden" name="action" value="remove_propagation">
                            <input type="hidden" name="class_type_id" id="remove_propagation_class_type_id">
                            <div class="mb-3">
                                <label for="remove_propagation_id" class="form-label">ID Propagazione</label>
                                <input type="text" class="form-control" id="remove_propagation_id" name="propagation_id" required>
                                <small class="form-text text-muted">Inserisci l'ID della propagazione da rimuovere (lo trovi nel messaggio di successo dopo la propagazione).</small>
                            </div>
                        </div>
                        <div class="modal-footer">
                            <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Chiudi</button>
                            <button type="submit" class="btn btn-danger">Rimuovi</button>
                        </div>
                    </form>
                </div>
            </div>
        </div>
        <!-- Modale per aggiungere una variazione -->
        <div class="modal fade" id="addVariationModal" tabindex="-1" aria-labelledby="addVariationModalLabel" aria-hidden="true">
            <div class="modal-dialog modal-lg">
                <div class="modal-content">
                    <div class="modal-header">
                        <h5 class="modal-title" id="addVariationModalLabel">Aggiungi Variazione</h5>
                        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
                    </div>
                    <form action="" method="POST" enctype="multipart/form-data">
                        <div class="modal-body">
                            <input type="hidden" name="action" value="add_variation">
                            <input type="hidden" name="class_id" id="add_variation_class_id">
                            <div class="row">
                                <div class="col-md-4 mb-3">
                                    <label for="add_variation_level" class="form-label">Livello</label>
                                    <select class="form-control" id="add_variation_level" name="level" required>
                                        <option value="beginner">Beginner</option>
                                        <option value="intermediate">Intermediate</option>
                                        <option value="advanced">Advanced</option>
                                    </select>
                                </div>
                                <div class="col-md-4 mb-3">
                                    <label for="add_variation_typical_duration" class="form-label">Durata Tipica (min)</label>
                                    <input type="number" class="form-control" id="add_variation_typical_duration" name="typical_duration">
                                </div>
                                <div class="col-md-4 mb-3">
                                    <label for="add_variation_max_capacity" class="form-label">Posti Massimi</label>
                                    <input type="number" class="form-control" id="add_variation_max_capacity" name="max_capacity" min="0" required>
                                </div>
                            </div>
                            <div class="row">
                                <div class="col-md-6 mb-3">
                                    <label for="add_variation_day_of_week" class="form-label">Giorno della Settimana</label>
                                    <select class="form-control" id="add_variation_day_of_week" name="day_of_week" required>
                                        <option value="">Seleziona un giorno</option>
                                        <option value="monday">Lunedì</option>
                                        <option value="tuesday">Martedì</option>
                                        <option value="wednesday">Mercoledì</option>
                                        <option value="thursday">Giovedì</option>
                                        <option value="friday">Venerdì</option>
                                        <option value="saturday">Sabato</option>
                                        <option value="sunday">Domenica</option>
                                    </select>
                                </div>
                                <div class="col-md-6 mb-3">
                                    <label for="add_variation_start_time" class="form-label">Orario di Inizio</label>
                                    <input type="time" class="form-control" id="add_variation_start_time" name="start_time" required>
                                </div>
                            </div>
                            <div class="mb-3">
                                <label for="add_variation_room_name" class="form-label">Sala</label>
                                <input type="text" class="form-control" id="add_variation_room_name" name="room_name">
                            </div>
                            <div class="mb-3">
                                <label for="add_variation_notes" class="form-label">Note</label>
                                <textarea class="form-control" id="add_variation_notes" name="notes" rows="2"></textarea>
                            </div>
                            <div class="mb-3">
                                <label for="add_variation_photo" class="form-label">Foto (opzionale)</label>
                                <input type="file" class="form-control" id="add_variation_photo" name="photo" accept="image/*">
                            </div>
                            <div class="mb-3">
                                <label for="add_variation_status" class="form-label">Stato</label>
                                <div class="form-check form-switch">
                                    <input class="form-check-input" type="checkbox" id="add_variation_status" name="status" value="active" checked>
                                    <label class="form-check-label" for="add_variation_status">Attivo</label>
                                </div>
                            </div>
                        </div>
                        <div class="modal-footer">
                            <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Chiudi</button>
                            <button type="submit" class="btn btn-primary">Aggiungi</button>
                        </div>
                    </form>
                </div>
            </div>
        </div>

        <!-- Modale per modificare una variazione -->
        <div class="modal fade" id="editVariationModal" tabindex="-1" aria-labelledby="editVariationModalLabel" aria-hidden="true">
            <div class="modal-dialog modal-lg">
                <div class="modal-content">
                    <div class="modal-header">
                        <h5 class="modal-title" id="editVariationModalLabel">Modifica Variazione</h5>
                        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
                    </div>
                    <form action="" method="POST" enctype="multipart/form-data">
                        <div class="modal-body">
                            <input type="hidden" name="action" value="edit_variation">
                            <input type="hidden" name="id" id="edit_variation_id">
                            <input type="hidden" name="class_id" id="edit_variation_class_id">
                            <div class="row">
                                <div class="col-md-4 mb-3">
                                    <label for="edit_variation_level" class="form-label">Livello</label>
                                    <select class="form-control" id="edit_variation_level" name="level" required>
                                        <option value="beginner">Beginner</option>
                                        <option value="intermediate">Intermediate</option>
                                        <option value="advanced">Advanced</option>
                                    </select>
                                </div>
                                <div class="col-md-4 mb-3">
                                    <label for="edit_variation_typical_duration" class="form-label">Durata Tipica (min)</label>
                                    <input type="number" class="form-control" id="edit_variation_typical_duration" name="typical_duration">
                                </div>
                                <div class="col-md-4 mb-3">
                                    <label for="edit_variation_max_capacity" class="form-label">Posti Massimi</label>
                                    <input type="number" class="form-control" id="edit_variation_max_capacity" name="max_capacity" min="0" required>
                                </div>
                            </div>
                            <div class="row">
                                <div class="col-md-6 mb-3">
                                    <label for="edit_variation_day_of_week" class="form-label">Giorno della Settimana</label>
                                    <select class="form-control" id="edit_variation_day_of_week" name="day_of_week" required>
                                        <option value="">Seleziona un giorno</option>
                                        <option value="monday">Lunedì</option>
                                        <option value="tuesday">Martedì</option>
                                        <option value="wednesday">Mercoledì</option>
                                        <option value="thursday">Giovedì</option>
                                        <option value="friday">Venerdì</option>
                                        <option value="saturday">Sabato</option>
                                        <option value="sunday">Domenica</option>
                                    </select>
                                </div>
                                <div class="col-md-6 mb-3">
                                    <label for="edit_variation_start_time" class="form-label">Orario di Inizio</label>
                                    <input type="time" class="form-control" id="edit_variation_start_time" name="start_time" required>
                                </div>
                            </div>
                            <div class="mb-3">
                                <label for="edit_variation_room_name" class="form-label">Sala</label>
                                <input type="text" class="form-control" id="edit_variation_room_name" name="room_name">
                            </div>
                            <div class="mb-3">
                                <label for="edit_variation_notes" class="form-label">Note</label>
                                <textarea class="form-control" id="edit_variation_notes" name="notes" rows="2"></textarea>
                            </div>
                            <div class="mb-3">
                                <label for="edit_variation_photo" class="form-label">Foto (opzionale)</label>
                                <input type="file" class="form-control" id="edit_variation_photo" name="photo" accept="image/*">
                            </div>
                            <div class="mb-3">
                                <label for="edit_variation_status" class="form-label">Stato</label>
                                <div class="form-check form-switch">
                                    <input class="form-check-input" type="checkbox" id="edit_variation_status" name="status" value="active">
                                    <label class="form-check-label" for="edit_variation_status">Attivo</label>
                                </div>
                            </div>
                        </div>
                        <div class="modal-footer">
                            <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Chiudi</button>
                            <button type="submit" class="btn btn-primary">Salva Modifiche</button>
                        </div>
                    </form>
                </div>
            </div>
        </div>
        <!-- Modale per modificare una sessione -->
        <div class="modal fade" id="editSessionModal" tabindex="-1" aria-labelledby="editSessionModalLabel" aria-hidden="true">
            <div class="modal-dialog">
                <div class="modal-content">
                    <div class="modal-header">
                        <h5 class="modal-title" id="editSessionModalLabel">Modifica Sessione</h5>
                        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
                    </div>
                    <form action="" method="POST">
                        <div class="modal-body">
                            <input type="hidden" name="action" value="edit_session">
                            <input type="hidden" name="id" id="edit_session_id">
                            <input type="hidden" name="class_type_id" id="edit_session_class_type_id">
                            <div class="mb-3">
                                <label for="edit_session_date" class="form-label">Data</label>
                                <input type="date" class="form-control" id="edit_session_date" name="session_date" required>
                            </div>
                            <div class="row">
                                <div class="col-md-6 mb-3">
                                    <label for="edit_session_start_time" class="form-label">Orario di Inizio</label>
                                    <input type="time" class="form-control" id="edit_session_start_time" name="start_time" required>
                                </div>
                                <div class="col-md-6 mb-3">
                                    <label for="edit_session_end_time" class="form-label">Orario di Fine</label>
                                    <input type="time" class="form-control" id="edit_session_end_time" name="end_time" required>
                                </div>
                            </div>
                            <div class="mb-3">
                                <label for="edit_session_teacher_id" class="form-label">Insegnante</label>
                                <select class="form-control" id="edit_session_teacher_id" name="teacher_id">
                                    <option value="">Nessun insegnante (Non assegnato)</option>
                                    <?php foreach ($teachers as $teacher): ?>
                                        <option value="<?php echo $teacher['id']; ?>">
                                            <?php echo htmlspecialchars($teacher['first_name'] . ' ' . $teacher['last_name']); ?>
                                        </option>
                                    <?php endforeach; ?>
                                </select>
                            </div>
                            <div class="mb-3">
                                <label for="edit_session_status" class="form-label">Stato</label>
                                <select class="form-control" id="edit_session_status" name="status" required>
                                    <option value="scheduled">Programmata</option>
                                    <option value="completed">Completata</option>
                                    <option value="cancelled">Annullata</option>
                                </select>
                            </div>
                        </div>
                        <div class="modal-footer">
                            <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Chiudi</button>
                            <button type="submit" class="btn btn-primary">Salva Modifiche</button>
                        </div>
                    </form>
                </div>
            </div>
        </div>
        <!-- Modale per il messaggio di successo della propagazione -->
        <div class="modal fade" id="successPropagationModal" tabindex="-1" aria-labelledby="successPropagationModalLabel" aria-hidden="true">
            <div class="modal-dialog">
                <div class="modal-content">
                    <div class="modal-header">
                        <h5 class="modal-title" id="successPropagationModalLabel">Propagazione Completata</h5>
                        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
                    </div>
                    <div class="modal-body">
                        <p id="successPropagationMessage"></p>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-primary" data-bs-dismiss="modal">Chiudi</button>
                    </div>
                </div>
            </div>
        </div>
        <div class="overlay toggle-icon"></div>
        <a href="javaScript:;" class="back-to-top"><i class='bx bxs-up-arrow-alt'></i></a>
        <?php include('include/footer.php'); ?>
    </div>
    <?php include('jsinclude.php'); ?>

    <!-- Script per inizializzare DataTables e gestire i modali -->
    <script>
        $(document).ready(function() {
            $('#classesTable').DataTable({
                "language": {
                    "url": "//cdn.datatables.net/plug-ins/1.10.25/i18n/Italian.json"
                },
                "ordering": false // Disabilita l'ordinamento per gestire i collapse
            });

            $('#dailySessionsTable').DataTable({
                "language": {
                    "url": "//cdn.datatables.net/plug-ins/1.10.25/i18n/Italian.json"
                },
                "pageLength": 5,
                "lengthMenu": [5, 10, 25, 50]
            });
        });

        function fillEditModal(data) {
            document.getElementById('edit_id').value = data.id;
            document.getElementById('edit_category_id').value = data.category_id;
            document.getElementById('edit_name').value = data.name;
            document.getElementById('edit_description').value = data.description;
            document.getElementById('edit_requirements').value = data.requirements;
            document.getElementById('edit_status').checked = (data.status === 'active');
        }

        function fillAddVariationModal(data) {
            document.getElementById('add_variation_class_id').value = data.class_id;
        }

        function fillEditVariationModal(data) {
            document.getElementById('edit_variation_id').value = data.id;
            document.getElementById('edit_variation_class_id').value = data.class_id;
            document.getElementById('edit_variation_level').value = data.level;
            document.getElementById('edit_variation_typical_duration').value = data.typical_duration;
            document.getElementById('edit_variation_max_capacity').value = data.max_capacity;
            document.getElementById('edit_variation_day_of_week').value = data.day_of_week;
            document.getElementById('edit_variation_start_time').value = data.start_time;
            document.getElementById('edit_variation_room_name').value = data.room_name;
            document.getElementById('edit_variation_notes').value = data.notes;
            document.getElementById('edit_variation_status').checked = (data.status === 'active');
        }

        function fillAssignTeacherModal(data) {
            document.getElementById('assign_class_type_id').value = data.class_type_id;
            document.getElementById('assign_teacher_id').value = data.teacher_id || '';
        }

        function fillPropagateModal(data) {
            document.getElementById('propagate_class_type_id').value = data.class_type_id;
        }

        function fillRemovePropagationModal(data) {
            document.getElementById('remove_propagation_class_type_id').value = data.class_type_id;
        }

        function fillEditSessionModal(data) {
            document.getElementById('edit_session_id').value = data.id;
            document.getElementById('edit_session_class_type_id').value = data.class_type_id;
            document.getElementById('edit_session_date').value = data.session_date;
            document.getElementById('edit_session_start_time').value = data.start_time;
            document.getElementById('edit_session_end_time').value = data.end_time;
            document.getElementById('edit_session_teacher_id').value = data.teacher_id || '';
            document.getElementById('edit_session_status').value = data.status;
        }
    </script>

    <!-- MODALE CALENDARIO (GRANDE MA NON FULLSCREEN + FIXATO) -->
    <div class="modal fade" id="calendarModal" tabindex="-1" aria-labelledby="calendarModalLabel" aria-hidden="true">
        <div class="modal-dialog modal-xl modal-dialog-scrollable" style="max-width: 95vw;">
            <div class="modal-content" style="height: 95vh;">
                <div class="modal-header bg-primary text-white">
                    <h5 class="modal-title" id="calendarModalLabel">
                        Calendario Lezioni
                    </h5>
                    <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal" aria-label="Close"></button>
                </div>
                <div class="modal-body p-0 d-flex flex-column" style="height: 100%;">
                    <div id="fullcalendar-modal" class="flex-grow-1"></div>
                </div>
            </div>
        </div>
    </div>

    <!-- FullCalendar CDN -->
    <link href="https://cdn.jsdelivr.net/npm/fullcalendar@6.1.15/main.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/fullcalendar@6.1.15/main.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/fullcalendar@6.1.15/locales/it.min.js"></script>

    <script>
        document.addEventListener('DOMContentLoaded', function() {
            let calendar = null;

            const modalElement = document.getElementById('calendarModal');
            const calendarEl = document.getElementById('fullcalendar-modal');

            // Funzione per inizializzare o aggiornare il calendario
            function initCalendar() {
                if (calendar) {
                    calendar.destroy();
                }

                calendar = new FullCalendar.Calendar(calendarEl, {
                    locale: 'it',
                    initialView: 'timeGridWeek',
                    headerToolbar: {
                        left: 'prev,next today',
                        center: 'title',
                        right: 'dayGridMonth,timeGridWeek'
                    },
                    buttonText: {
                        today: 'Oggi',
                        month: 'Mese',
                        week: 'Settimana'
                    },
                    height: '100%',
                    slotMinTime: '06:00:00',
                    slotMaxTime: '23:00:00',
                    events: [
                        <?php
                        $from = date('Y-m-d');
                        $to = date('Y-m-d', strtotime('+90 days'));
                        $stmt = $pdo->prepare("
                    SELECT cs.session_date, cs.start_time, cs.end_time, cs.status,
                           c.name AS class_name, ct.level, ct.room_name,
                           t.first_name, t.last_name
                    FROM class_sessions cs
                    JOIN class_types ct ON cs.class_type_id = ct.id
                    JOIN classes c ON ct.class_id = c.id
                    LEFT JOIN teachers t ON cs.teacher_id = t.id
                    WHERE cs.session_date BETWEEN ? AND ?
                      AND c.school_id = ?
                ");
                        $stmt->execute([$from, $to, $school_id]);
                        foreach ($stmt->fetchAll() as $e) {
                            $title = $e['class_name'];
                            if ($e['level']) $title .= ' - ' . ucfirst($e['level']);
                            if ($e['first_name']) $title .= ' (' . $e['first_name'] . ')';
                            if ($e['room_name']) $title .= ' | ' . $e['room_name'];

                            $color = '#0d6efd';
                            if ($e['status'] === 'completed') $color = '#198754';
                            if ($e['status'] === 'cancelled') $color = '#dc3545';

                            echo "{ 
                        title: '" . addslashes($title) . "',
                        start: '{$e['session_date']}T{$e['start_time']}',
                        end: '{$e['session_date']}T{$e['end_time']}',
                        color: '$color'
                    }, ";
                        }
                        ?>
                    ],
                    eventClick: function(info) {
                        const date = info.event.start.toISOString().split('T')[0];
                        window.location.href = '?start_date=' + date + '&end_date=' + date;
                    }
                });

                calendar.render();
            }

            // Apri il modale → inizializza e forza resize
            modalElement.addEventListener('shown.bs.modal', function() {
                initCalendar();
                setTimeout(() => calendar.updateSize(), 100);
            });

            // Se chiudi e riapri, ricarica
            modalElement.addEventListener('hidden.bs.modal', function() {
                if (calendar) {
                    calendar.destroy();
                    calendar = null;
                }
            });
        });
    </script>

    <style>
        #fullcalendar-modal .fc-header-toolbar {
            margin-bottom: 15px;
        }

        #fullcalendar-modal .fc-button {
            border-radius: 6px !important;
        }

        #fullcalendar-modal .fc-event {
            border: none;
            border-radius: 6px;
            padding: 3px 6px;
            font-size: 0.9em;
            white-space: normal;
        }
    </style>
    <?php foreach ($range_sessions as $session): ?>
        <?php if ($session['booked_count'] > 0): ?>
            <div class="modal fade" id="studentsModal-<?php echo $session['id']; ?>" tabindex="-1">
                <div class="modal-dialog modal-lg">
                    <div class="modal-content">
                        <div class="modal-header bg-primary text-white">
                            <h5 class="modal-title">
                                Prenotati - <?php echo htmlspecialchars($session['class_name']); ?>
                                <?php echo ucfirst($session['level']); ?>
                                del <?php echo date('d/m/Y', strtotime($session['session_date'])); ?>
                                ore <?php echo substr($session['start_time'], 0, 5); ?>
                            </h5>
                            <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
                        </div>
                        <div class="modal-body">
                            <div class="table-responsive">
                                <table class="table table-sm table-hover">
                                    <thead class="table-light">
                                        <tr>
                                            <th>Nome</th>
                                            <th>Email</th>
                                            <th>Telefono</th>
                                            <th>Stato</th>
                                        </tr>
                                    </thead>
                                    <tbody>
                                        <?php
                                        $students = explode(';;;', $session['booked_students'] ?? '');
                                        foreach ($students as $s):
                                            if (empty(trim($s))) continue;
                                            list($name, $email, $phone) = explode('|', $s . '||');
                                        ?>
                                            <tr>
                                                <td><strong><?php echo htmlspecialchars($name); ?></strong></td>
                                                <td><?php echo htmlspecialchars($email); ?></td>
                                                <td><?php echo htmlspecialchars($phone ?: '—'); ?></td>
                                                <td><span class="badge bg-success">Prenotato</span></td>
                                            </tr>
                                        <?php endforeach; ?>
                                    </tbody>
                                </table>
                            </div>
                        </div>
                        <div class="modal-footer">
                            <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Chiudi</button>
                        </div>
                    </div>
                </div>
            </div>
    <?php endif;
    endforeach; ?>
</body>

</html>