<?php
require_once('Connections/bkngstm.php');
require_once('webassist/mysqli/rsobj.php');
include('include/headscript.php'); // $iduserlogin

/***********************
 * LOG (mail + debug)
 ***********************/
$logDir = __DIR__ . '/logs';
if (!is_dir($logDir)) {
    @mkdir($logDir, 0755, true);
}
$mailLogFile = $logDir . '/mail_cancel.log';

function mail_log($file, $msg)
{
    @file_put_contents($file, "[" . date("Y-m-d H:i:s") . "] " . $msg . PHP_EOL, FILE_APPEND);
}

/***********************
 * INPUT
 ***********************/
if (!isset($_GET['id'])) {
    die("ID non fornito.");
}

$id     = (int)$_GET['id'];
$userId = (int)$iduserlogin;

/***********************
 * DB
 ***********************/
$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
    die("Connessione fallita: " . $conn->connect_error);
}

/***********************
 * 1) USER INFO (auth_users)
 ***********************/
$stmt = $conn->prepare("SELECT email, first_name, last_name FROM auth_users WHERE id = ? LIMIT 1");
$stmt->bind_param("i", $userId);
$stmt->execute();
$res = $stmt->get_result();
$u = $res->fetch_assoc();
$stmt->close();

$userEmail = $u['email'] ?? '';
$userName  = trim(($u['first_name'] ?? '') . ' ' . ($u['last_name'] ?? ''));

/***********************
 * 2) BOOKING INFO (nome classe + data) + ownership check
 ***********************/
$stmt = $conn->prepare("
    SELECT
        bc.idbookingclass,
        s.servicename,
        ss.dateschedule
    FROM bookingclass bc
    LEFT JOIN service s ON bc.idservice = s.idservice
    LEFT JOIN serviceschedule ss ON bc.idserviceschedule = ss.idserviceschedule
    WHERE bc.idbookingclass = ? AND bc.iduser = ?
    LIMIT 1
");
$stmt->bind_param("ii", $id, $userId);
$stmt->execute();
$res = $stmt->get_result();
$bk = $res->fetch_assoc();
$stmt->close();

if (!$bk) {
    $conn->close();
    header("Location: userpanel.php?deleted=0&err=notfound");
    exit();
}

$className    = $bk['servicename'] ?? 'Lezione';
$classDateRaw = $bk['dateschedule'] ?? null;

$classDateTxt  = $classDateRaw ? date("d-m-Y H:i", strtotime($classDateRaw)) : 'N/D';
$cancelDateTxt = date("d-m-Y H:i");

/***********************
 * 3) DELETE (safe)
 ***********************/
$stmt = $conn->prepare("DELETE FROM bookingclass WHERE idbookingclass = ? AND iduser = ?");
$stmt->bind_param("ii", $id, $userId);

if (!$stmt->execute()) {
    $err = $stmt->error;
    $stmt->close();
    $conn->close();
    die("Errore durante la cancellazione del record: " . htmlspecialchars($err));
}

$stmt->close();
$conn->close();

/***********************
 * 4) EMAIL (TO utente + CC info@yogasoul.it)
 * Usa le chiavi del tuo .env: MAIL_HOST, MAIL_PORT, MAIL_USERNAME, ...
 ***********************/
try {
    // Carica vendor/autoload + dotenv (il tuo file esistente)
    require_once(__DIR__ . '/class/mailer.php');

    $mail = new \PHPMailer\PHPMailer\PHPMailer(true);

    // Legge le variabili in stile Laravel (con trim per eventuali virgolette)
    $host = trim($_ENV['MAIL_HOST'] ?? 'mail.yogasoul.it', "\" \t\n\r\0\x0B");
    $port = (int)($_ENV['MAIL_PORT'] ?? 465);
    $user = $_ENV['MAIL_USERNAME'] ?? '';
    $pass = $_ENV['MAIL_PASSWORD'] ?? '';
    $enc  = strtolower(trim($_ENV['MAIL_ENCRYPTION'] ?? 'ssl', "\" \t\n\r\0\x0B"));

    $fromEmail = trim($_ENV['MAIL_FROM_ADDRESS'] ?? 'info@yogasoul.it', "\" \t\n\r\0\x0B");
    $fromName  = trim($_ENV['MAIL_FROM_NAME'] ?? 'YogiBook', "\" \t\n\r\0\x0B");

    // Config SMTP
    $mail->isSMTP();
    $mail->Host       = $host;
    $mail->SMTPAuth   = true;
    $mail->Username   = $user;
    $mail->Password   = $pass;
    $mail->Port       = $port;

    if (in_array($enc, ['tls', 'ssl'], true)) {
        $mail->SMTPSecure = $enc;
    }

    // Timeout (utile su SMTP hosting)
    $mail->Timeout = 20;

    $mail->setFrom($fromEmail, $fromName);
    $mail->CharSet = 'UTF-8';
    $mail->isHTML(true);

    // Destinatari
    if (!empty($userEmail)) {
        $mail->addAddress($userEmail, $userName ?: '');
    }
    $mail->addCC('info@yogasoul.it');

    // Log impostazioni usate (senza password)
    mail_log($mailLogFile, "SMTP in uso host={$host} porta={$port} enc={$enc} user={$user}");

    // Contenuto (ITALIANO)
    $mail->Subject = "Lezione cancellata - {$className}";
    $mail->Body = "
        <div style='font-family:Arial,sans-serif;font-size:14px;color:#222'>
            <p>Ciao " . htmlspecialchars($userName ?: 'Yogi') . ",</p>
            <p>La tua lezione è stata <b>cancellata</b>.</p>
            <p>
              <b>Lezione:</b> " . htmlspecialchars($className) . "<br>
              <b>Data/ora prevista:</b> " . htmlspecialchars($classDateTxt) . "<br>
              <b>Data/ora cancellazione:</b> " . htmlspecialchars($cancelDateTxt) . "<br>
              <b>ID prenotazione:</b> #{$id}
            </p>
            <p>Grazie,<br>— " . htmlspecialchars($fromName) . "</p>
        </div>
    ";

    $mail->send();

    mail_log($mailLogFile, "OK inviata. booking_id={$id} user_id={$userId} to={$userEmail} lezione='" . $className . "' prevista='{$classDateTxt}' cancellata='{$cancelDateTxt}'");
} catch (Throwable $e) {
    mail_log($mailLogFile, "ERRORE invio. booking_id={$id} user_id={$userId} to={$userEmail} :: " . $e->getMessage());
    error_log("Mailer error (delete booking #{$id}, user #{$userId}): " . $e->getMessage());
}

// Redirect
header("Location: userpanel.php?deleted=1");
exit();