<?php
declare(strict_types=1);

/**
 * Notification e-mail pour un nouveau message dans la messagerie interne.
 *
 * À inclure APRÈS $pdo->commit() dans le script d'envoi de message :
 *
 *   try {
 *       require_once __DIR__ . '/../public/message_par_mail.php';
 *       notifier_nouveau_message_par_email($pdo, $convId, $role);
 *   } catch (Throwable $e) {
 *       error_log('Notif mail error: '.$e->getMessage());
 *   }
 *
 * - $pdo    : PDO connecté à la base uslugi
 * - $convId : ID de la conversation
 * - $role   : 'praticien' ou 'client' (l'expéditeur)
 */
require_once __DIR__ . '/../../includes/bootstrap_global.php';

// On suppose que $translations est déjà chargé par _bootstrap/lang.php.
// Si ce n’est pas le cas, on évite de crasher.
if (!isset($translations) || !is_array($translations)) {
    $translations = [];
}

/**
 * Envoie un e-mail de notification pour un nouveau message.
 *
 * @param PDO    $pdo
 * @param int    $conversationId  ID de la conversation
 * @param string $senderRole      'praticien' ou 'client'
 */
function notifier_nouveau_message_par_email(PDO $pdo, int $conversationId, string $senderRole): void
{
    global $translations;

    if ($senderRole !== 'praticien' && $senderRole !== 'client') {
        return;
    }

    // Récupérer la conversation + emails praticien/client
    $sql = "
        SELECT
            c.id           AS conv_id,
            c.praticien_id AS prat_id,
            c.client_id    AS cli_id,
            p.email        AS prat_email,
            p.nom          AS prat_nom,
            p.prenom       AS prat_prenom,
            cl.email       AS cli_email,
            cl.nom         AS cli_nom,
            cl.prenom      AS cli_prenom
        FROM conversations c
        INNER JOIN praticien p ON p.id = c.praticien_id
        INNER JOIN client     cl ON cl.id = c.client_id
        WHERE c.id = ?
        LIMIT 1
    ";
    $stmt = $pdo->prepare($sql);
    $stmt->execute([$conversationId]);
    $row = $stmt->fetch(\PDO::FETCH_ASSOC);

    if (!$row) {
        return; // conversation introuvable
    }

    // Déterminer le destinataire
    if ($senderRole === 'praticien') {
        // Le praticien écrit → on notifie le client
        $toEmail = (string)($row['cli_email'] ?? '');
        $toName  = trim(((string)($row['cli_prenom'] ?? '')) . ' ' . ((string)($row['cli_nom'] ?? '')));
    } else {
        // Le client écrit → on notifie le praticien
        $toEmail = (string)($row['prat_email'] ?? '');
        $toName  = trim(((string)($row['prat_prenom'] ?? '')) . ' ' . ((string)($row['prat_nom'] ?? '')));
    }

    if (!filter_var($toEmail, FILTER_VALIDATE_EMAIL)) {
        return;
    }

    // ===== Textes via $translations (avec fallback FR) =====
    $subject   = $translations['email_new_msg_subject']
                 ?? 'Vous avez un nouveau message sur USLUGI.FR';

    $helloTmpl = $translations['email_new_msg_hello']
                 ?? 'Bonjour %s,';
    $helloLine = sprintf($helloTmpl, $toName !== '' ? $toName : '');

    $intro     = $translations['email_new_msg_intro']
                 ?? 'Vous avez reçu un nouveau message dans votre messagerie USLUGI.FR.';
    $ctaLabel  = $translations['email_new_msg_cta_label']
                 ?? 'Se connecter à USLUGI.FR';
    $footer    = $translations['email_new_msg_footer']
                 ?? 'Merci d\'utiliser USLUGI.FR.';

    // Lien générique de connexion (sans rôle, ni token)
    $ctaUrl = 'https://uslugi.fr/connexion.php';

    // ===== Version texte =====
    $textLines   = [];
    $textLines[] = $helloLine;
    $textLines[] = '';
    $textLines[] = $intro;
    $textLines[] = '';
    $textLines[] = $ctaLabel . ' : ' . $ctaUrl;
    $textLines[] = '';
    $textLines[] = $footer;
    $textBody    = implode("\n", $textLines);

    // ===== Version HTML =====
    $safeHello  = htmlspecialchars($helloLine, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
    $safeIntro  = nl2br(htmlspecialchars($intro,  ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8'));
    $safeFooter = nl2br(htmlspecialchars($footer, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8'));
    $safeCtaLbl = htmlspecialchars($ctaLabel, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
    $safeCtaUrl = htmlspecialchars($ctaUrl,   ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');

    $htmlBody = '<!DOCTYPE html>
<html lang="fr">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width,initial-scale=1">
  <title>USLUGI.FR</title>
</head>
<body style="margin:0;padding:0;background:#f4f6f8;font-family:Arial,Helvetica,sans-serif;">
  <table role="presentation" width="100%" cellpadding="0" cellspacing="0" style="background:#f4f6f8;padding:24px 0;">
    <tr>
      <td align="center">
        <table role="presentation" width="600" cellpadding="0" cellspacing="0" style="background:#ffffff;border-radius:8px;overflow:hidden;">
          <tr>
            <td style="background:#38378B;color:#ffffff;padding:20px 24px;font-size:18px;font-weight:600;">
            <img 
                src="https://uslugi.fr/public/uploads/img/logo_mail.png"
                alt="USLUGI.FR"
                width="150">
            </td>
          </tr>
          <tr>
            <td style="padding:24px 24px 8px 24px;color:#111111;font-size:16px;line-height:1.5;">
              ' . $safeHello . '
            </td>
          </tr>
          <tr>
            <td style="padding:8px 24px 16px 24px;color:#111111;font-size:15px;line-height:1.6;">
              ' . $safeIntro . '
            </td>
          </tr>
          <tr>
            <td align="center" style="padding:8px 24px 24px 24px;">
              <a href="' . $safeCtaUrl . '" target="_blank"
                 style="display:inline-block;text-decoration:none;padding:12px 22px;border-radius:999px;background:#E03C3F;color:#ffffff;font-weight:600;">
                ' . $safeCtaLbl . '
              </a>
            </td>
          </tr>
          <tr>
            <td style="padding:0 24px 24px 24px;color:#111111;font-size:14px;line-height:1.6;">
              ' . $safeFooter . '
            </td>
          </tr>
        </table>
        <table role="presentation" width="600" cellpadding="0" cellspacing="0" style="margin-top:12px;">
          <tr>
            <td style="text-align:center;color:#9ca3af;font-size:12px;padding:8px 0;">
              © ' . date('Y') . ' USLUGI.FR
            </td>
          </tr>
        </table>
      </td>
    </tr>
  </table>
</body>
</html>';

    // ===== Envoi via helper uslugi_mail() =====
    try {
        [$ok, $err] = uslugi_mail($toEmail, $subject, $htmlBody, $textBody);
        if (!$ok && $err) {
            error_log('uslugi_mail(new_message) error: ' . $err);
        }
    } catch (\Throwable $e) {
        error_log('Exception uslugi_mail(new_message): ' . $e->getMessage());
    }
}