<?php
ob_start();
include('include/headscript.php');

$db  = DBHandlerSelect::getInstance();
$pdo = $db->getConnection();

function jsonOut($success, $message = '', $extra = [])
{
    if (ob_get_length()) ob_clean();
    header('Content-Type: application/json; charset=utf-8');
    echo json_encode(array_merge(['success' => $success, 'message' => $message], $extra));
    exit;
}

$id          = (int)($_POST['id'] ?? 0);
$nome        = trim($_POST['nome'] ?? '');
$cliente     = trim($_POST['cliente'] ?? '');
$data        = trim($_POST['data'] ?? '');
$removePhoto = ($_POST['remove_photo'] ?? '0') === '1';

if ($nome === '') {
    jsonOut(false, 'Il nome matrice è obbligatorio');
}

$data = ($data !== '' && preg_match('/^\d{4}-\d{2}-\d{2}$/', $data)) ? $data : null;
$cliente = $cliente !== '' ? $cliente : null;

$photoDir = __DIR__ . '/photos/matrici/';
if (!is_dir($photoDir)) {
    mkdir($photoDir, 0775, true);
}

// Validazione file (se presente)
$hasUpload = isset($_FILES['photo']) && $_FILES['photo']['error'] !== UPLOAD_ERR_NO_FILE;
$ext = '';
if ($hasUpload) {
    if ($_FILES['photo']['error'] !== UPLOAD_ERR_OK) {
        jsonOut(false, 'Errore upload foto (codice ' . $_FILES['photo']['error'] . ')');
    }
    if ($_FILES['photo']['size'] > 10 * 1024 * 1024) {
        jsonOut(false, 'La foto supera i 10 MB');
    }
    $ext = strtolower(pathinfo($_FILES['photo']['name'], PATHINFO_EXTENSION));
    if (!in_array($ext, ['jpg', 'jpeg', 'png', 'gif', 'webp'], true)) {
        jsonOut(false, 'Formato foto non consentito (jpg, jpeg, png, gif, webp)');
    }
    if (@getimagesize($_FILES['photo']['tmp_name']) === false) {
        jsonOut(false, 'Il file caricato non è un\'immagine valida');
    }
}

try {
    $pdo->beginTransaction();

    $oldPhoto = null;

    if ($id > 0) {
        $st = $pdo->prepare("SELECT photo FROM matrice WHERE id = ?");
        $st->execute([$id]);
        $row = $st->fetch(PDO::FETCH_ASSOC);
        if (!$row) {
            $pdo->rollBack();
            jsonOut(false, 'Matrice non trovata');
        }
        $oldPhoto = $row['photo'];

        $st = $pdo->prepare("UPDATE matrice SET nome = ?, cliente = ?, data_produzione = ? WHERE id = ?");
        $st->execute([$nome, $cliente, $data, $id]);
    } else {
        $st = $pdo->prepare("INSERT INTO matrice (nome, cliente, data_produzione) VALUES (?, ?, ?)");
        $st->execute([$nome, $cliente, $data]);
        $id = (int)$pdo->lastInsertId();
    }

    // Nuova foto
    if ($hasUpload) {
        $newName = 'matrice_' . $id . '_' . time() . '.' . $ext;
        if (!move_uploaded_file($_FILES['photo']['tmp_name'], $photoDir . $newName)) {
            $pdo->rollBack();
            jsonOut(false, 'Impossibile salvare la foto sul server');
        }
        $pdo->prepare("UPDATE matrice SET photo = ? WHERE id = ?")->execute([$newName, $id]);

        if ($oldPhoto && is_file($photoDir . basename($oldPhoto))) {
            @unlink($photoDir . basename($oldPhoto));
        }
    } elseif ($removePhoto && $oldPhoto) {
        // Rimozione foto
        $pdo->prepare("UPDATE matrice SET photo = NULL WHERE id = ?")->execute([$id]);
        if (is_file($photoDir . basename($oldPhoto))) {
            @unlink($photoDir . basename($oldPhoto));
        }
    }

    $pdo->commit();
    jsonOut(true, 'Matrice salvata correttamente', ['id' => $id]);
} catch (Throwable $e) {
    if ($pdo->inTransaction()) $pdo->rollBack();
    jsonOut(false, 'Errore: ' . $e->getMessage());
}