<?php
    // /public/cabinet/reserver_rdv.php
    require_once __DIR__ . '/../includes/init_secretaire.php';

    // Valeurs par défaut pour les modes
    $c_online  = $c_online ?? 'online';
    $c_offline = $c_offline ?? 'offline';

    // ---- Entrées ----
    if (! isset($_GET['praticien_id'])) {
    exit($translations['praticien_non_precise'] ?? 'Praticien non précisé.');
    }
    $praticien_id = (int) $_GET['praticien_id'];
    $client_id    = isset($_GET['client_id']) ? (int) $_GET['client_id'] : null;

    $secretaire_user_id = (int) ($_SESSION['compte_id'] ?? 0);
    if ($secretaire_user_id <= 0 || $praticien_id <= 0) {http_response_code(403);exit('Forbidden');}

    // ---- Sécurité pivot secrétaire → praticien ----
    $chk = $pdo->prepare("
  SELECT can_manage_rdv
    FROM secretaire_praticien
   WHERE secretaire_user_id = :u
     AND praticien_id      = :p
     AND is_active         = 1
   LIMIT 1
");
    $chk->execute([':u' => $secretaire_user_id, ':p' => $praticien_id]);
    $pivot = $chk->fetch(PDO::FETCH_ASSOC);
    if (! $pivot) {http_response_code(403);exit('Forbidden');}
    $canManage = (int) ($pivot['can_manage_rdv'] ?? 0) === 1;

    // ---- Infos praticien ----
    $stmt = $pdo->prepare("SELECT nom, prenom, duree_rdv, adresse, ville, code_postal FROM praticien WHERE id = ?");
    $stmt->execute([$praticien_id]);
    $praticien     = $stmt->fetch(PDO::FETCH_ASSOC);
    $duree_minutes = (int) ($praticien['duree_rdv'] ?? 0);
    if ($duree_minutes <= 0) {
    die($translations['duree_rdv_non_definie'] ?? "Durée de RDV non définie.");
    }

    // Adresse complète ?
    $has_address =
    ! empty(trim((string) ($praticien['adresse'] ?? ''))) &&
    ! empty(trim((string) ($praticien['ville'] ?? ''))) &&
    ! empty(trim((string) ($praticien['code_postal'] ?? '')));

    // ---- Dispos praticien ----
    $stmt = $pdo->prepare("SELECT jour_semaine, heure_debut, heure_fin FROM disponibilite WHERE praticien_id = ?");
    $stmt->execute([$praticien_id]);
    $dispos = $stmt->fetchAll(PDO::FETCH_ASSOC);

    // ---- RDV réservés (prochains 21 jours) ----
    $tz    = new DateTimeZone('Europe/Paris');
    $now   = new DateTimeImmutable('now', $tz);
    $limit = $now->modify('+60 days');

    $stmt = $pdo->prepare("SELECT date_rdv FROM rendez_vous WHERE praticien_id = ? AND date_rdv BETWEEN ? AND ?");
    $stmt->execute([$praticien_id, $now->format('Y-m-d H:i:s'), $limit->format('Y-m-d H:i:s')]);
    $reservations = array_map(
    fn($r) => (new DateTimeImmutable($r['date_rdv'], $tz))->format('Y-m-d H:i'),
    $stmt->fetchAll(PDO::FETCH_ASSOC)
    );

    // ---- i18n jours ----
    $DAY_I18N = [
    'monday'    => 'jour_lundi',
    'tuesday'   => 'jour_mardi',
    'wednesday' => 'jour_mercredi',
    'thursday'  => 'jour_jeudi',
    'friday'    => 'jour_vendredi',
    'saturday'  => 'jour_samedi',
    'sunday'    => 'jour_dimanche',
    ];

    function normalize_day_key(string $label): ?string
    {
    $l          = mb_strtolower(trim($label));
    static $map = [
        // EN
        'monday'      => 'monday', 'tuesday'    => 'tuesday', 'wednesday' => 'wednesday',
        'thursday'    => 'thursday', 'friday'   => 'friday', 'saturday'   => 'saturday', 'sunday'      => 'sunday',
        // FR
        'lundi'       => 'monday', 'mardi'      => 'tuesday', 'mercredi'  => 'wednesday',
        'jeudi'       => 'thursday', 'vendredi' => 'friday', 'samedi'     => 'saturday', 'dimanche'    => 'sunday',
        // RU
        'понедельник' => 'monday', 'вторник'    => 'tuesday', 'среда'     => 'wednesday',
        'четверг'     => 'thursday', 'пятница'  => 'friday', 'суббота'    => 'saturday', 'воскресенье' => 'sunday',
    ];
    return $map[$l] ?? null;
    }

    // ---- Génération créneaux par jour ----
    $creneaux_par_jour = [];
    $periode           = new DatePeriod($now, new DateInterval('P1D'), $limit); // $limit exclusif

    foreach ($periode as $jour) {
    $dayKey   = strtolower($jour->format('l'));
    $i18nKey  = $DAY_I18N[$dayKey] ?? null;
    $jour_nom = $i18nKey ? ($translations[$i18nKey] ?? ucfirst($dayKey)) : ucfirst($dayKey);

    foreach ($dispos as $dispo) {
        $dispoKey = normalize_day_key($dispo['jour_semaine'] ?? '');
        if ($dispoKey !== $dayKey) {
            continue;
        }

        [$h1, $m1, $s1] = array_map('intval', explode(':', (string) $dispo['heure_debut']));
        [$h2, $m2, $s2] = array_map('intval', explode(':', (string) $dispo['heure_fin']));

        $debut_creneau = $jour->setTime($h1, $m1, $s1);
        $fin_creneau   = $jour->setTime($h2, $m2, $s2);
        if ($fin_creneau <= $debut_creneau) {
            continue;
        }

        $step = new DateInterval("PT{$duree_minutes}M");

        for ($t = $debut_creneau; $t->add($step) <= $fin_creneau; $t = $t->add($step)) {
            if ($t <= $now) {
                continue;
            }

            $debut_str = $t->format('Y-m-d H:i');
            if (! in_array($debut_str, $reservations, true)) {
                $key                       = $jour_nom . '<br> ' . $jour->format('d/m');
                $creneaux_par_jour[$key][] = $t;
            }
        }
    }
    }

    // Tri horaire dans chaque colonne
    foreach ($creneaux_par_jour as &$slots) {
    usort(
        $slots,
        fn(DateTimeImmutable $a, DateTimeImmutable $b) => $a->getTimestamp() <=> $b->getTimestamp()
    );
    }
    unset($slots);

    // Pagination colonnes
    $page          = isset($_GET['page']) ? max(1, (int) $_GET['page']) : 1;
    $limit_columns = 5;
    $all_keys      = array_keys($creneaux_par_jour);
    $total_pages   = max(1, (int) ceil(count($all_keys) / $limit_columns));
    $offset        = ($page - 1) * $limit_columns;
    $visible_keys  = array_slice($all_keys, $offset, $limit_columns);

    // petit helper
    if (! function_exists('h')) {function h($s)
    {return htmlspecialchars((string) $s, ENT_QUOTES, 'UTF-8');}}

    $PAGE_TITRE = $translations['creneaux_disponibles_title'] ?? 'Créneaux disponibles';
    $HEAD_EXTRA = <<<HTML
  <script src="/js/sweetalert2@11.js"></script>
HTML;
    require_once __DIR__ . '/../includes/header_cabinet.php';
?>
<div class="main1">
  <div class="container py-5">
    <div class="shadow p-4 rounded bg-light rdv-card">
      <h2 class="mb-4 text-center">
        <?php echo h(($praticien['prenom'] ?? '') . ' ' . ($praticien['nom'] ?? '')) ?> - <?php echo h($translations['zapis'] ?? 'Prendre rendez-vous') ?>
        <?php if (! $canManage): ?>
          <small class="text-danger d-block mt-1"><?php echo h($translations['droits_insuffisants'] ?? 'Droits insuffisants pour réserver') ?></small>
        <?php endif; ?>
      </h3>

      <?php if ($total_pages > 1): ?>
        <div class="pagination mb-3">
          <?php if ($page > 1): ?>
            <a class="btn btn-outline-secondary btn-sm"
               href="?praticien_id=<?php echo (int) $praticien_id ?>&<?php echo $client_id ? 'client_id=' . (int) $client_id . '&' : '' ?>page=<?php echo (int) ($page - 1) ?>">
               &laquo; <?php echo h($translations['pagination_precedent'] ?? 'Précédent') ?>
            </a>
          <?php endif; ?>
          <?php if ($page < $total_pages): ?>
            <a class="btn btn-outline-secondary btn-sm"
               href="?praticien_id=<?php echo (int) $praticien_id ?>&<?php echo $client_id ? 'client_id=' . (int) $client_id . '&' : '' ?>page=<?php echo (int) ($page + 1) ?>">
               <?php echo h($translations['pagination_suivant'] ?? 'Suivant') ?> &raquo;
            </a>
          <?php endif; ?>
        </div>
      <?php endif; ?>

      <?php if (empty($creneaux_par_jour)): ?>
        <p class="rdv-empty">
          <?php echo h($translations['aucun_creneau_disponible_3_semaines'] ?? 'Aucun créneau disponible sur 3 semaines.') ?><br><br>
          <a class="btn btn-outline-secondary btn-sm btn-table" href="/messages/start.php?praticien_id=<?php echo (int) $praticien_id ?>">
            <?php echo h($translations['chat_praticien'] ?? 'Ouvrir le chat') ?>
          </a>
        </p>
      <?php else: ?>
        <div class="grid-container">
          <?php foreach ($visible_keys as $jour): ?>
            <div class="day-column">
              <h4><?php echo $jour ?></h4>
              <?php foreach ($creneaux_par_jour[$jour] as $c): ?>
                <?php
                    $startIso     = $c->format(DateTime::ATOM);
                    $slotName     = 'mode_rdv_' . $c->format('YmdHi');
                    $onlineLabel  = $translations['option_online'] ?? 'Онлайн';
                    $cabinetLabel = $translations['option_cabinet'] ?? 'В кабинете';

                    // URL base vers l’étape de validation (version cabinet)
                    $validerBase = '/public/cabinet/valider_rdv.php';
                    $validerHref = $validerBase
                    . '?praticien_id=' . (int) $praticien_id
                    . '&start=' . rawurlencode($startIso)
                        . ($client_id ? '&client_id=' . (int) $client_id : '');
                ?>
                <div class="slot">
                  <div class="slot-time"><?php echo h($c->format('H:i')) ?></div>

                  <?php if ($has_address): ?>
                    <div class="mode-group my-2">
                      <label class="me-3">
                        <input type="radio" name="<?php echo h($slotName) ?>" value="<?php echo h($c_online) ?>" checked>
                        <?php echo h($onlineLabel) ?>
                      </label>
                      <label>
                        <input type="radio" name="<?php echo h($slotName) ?>" value="<?php echo h($c_offline) ?>">
                        <?php echo h($cabinetLabel) ?>
                      </label>
                    </div>
                  <?php else: ?>
                    <div class="mode-group my-2"><span><?php echo h($onlineLabel) ?></span></div>
                  <?php endif; ?>

                  <a href="<?php echo h($validerHref) ?>"
                     class="reserver-btn"
                     data-mode-name="<?php echo h($has_address ? $slotName : '') ?>"
                     data-default-mode="<?php echo h($c_online) ?>"
                     data-nom="<?php echo h($praticien['nom'] ?? '') ?>"
                     data-prenom="<?php echo h($praticien['prenom'] ?? '') ?>"
                     data-start="<?php echo h($startIso) ?>"
                     <?php echo $canManage ? '' : 'aria-disabled="true" tabindex="-1" style="pointer-events:none;opacity:.6;"' ?>
                  >
                    <?php echo h($translations['btn_reserver'] ?? 'Réserver') ?>
                  </a>
                </div>
              <?php endforeach; ?>
            </div>
          <?php endforeach; ?>
        </div>
      <?php endif; ?>
    </div>
  </div>
</div>

<script>
document.querySelectorAll('.reserver-btn').forEach(btn => {
  btn.addEventListener('click', function (e) {
    e.preventDefault();
    const start  = this.dataset.start;
    const nom    = this.dataset.nom;
    const prenom = this.dataset.prenom;

    // Récupérer le mode choisi
    const groupName = this.dataset.modeName;
    let modeVal = this.dataset.defaultMode || 'online';
    if (groupName) {
      const checked = this.closest('.slot').querySelector(`input[name="${groupName}"]:checked`);
      if (checked) modeVal = checked.value;
    }

    const date  = new Date(start);
    const jour  = date.toLocaleDateString('ru-RU', { weekday: 'long', day: '2-digit', month: '2-digit' });
    const heure = date.toLocaleTimeString('ru-RU', { hour: '2-digit', minute: '2-digit' });

    Swal.fire({
      title: <?php echo json_encode($translations['confirmation'] ?? 'Confirmation') ?>,
      html: `<b>${prenom} ${nom}<br>${jour} <?php echo $translations['a'] ?? 'à' ?> ${heure}</b>`,
      icon: 'question',
      showCancelButton: true,
      confirmButtonText: <?php echo json_encode($translations['btn_oui_reserver'] ?? 'Oui, réserver') ?>,
      cancelButtonText: <?php echo json_encode($translations['btn_annuler'] ?? 'Annuler') ?>
    }).then((result) => {
      if (result.isConfirmed) {
        const url = new URL(this.href, location.origin);
        url.searchParams.set('mode_rdv', modeVal);
        window.location.href = url.toString();
      }
    });
  });
});
</script>

<footer class="site-footer">
  <div class="container">
    <p><?php echo $translations['copyr'] ?? '&copy; ' . date('Y') ?></p>
  </div>
</footer>
</body>
</html>