<?php
    require_once __DIR__ . '/../includes/init_client.php';

    // Valeurs par défaut au cas où
    if (! isset($c_online)) {$c_online = 'online';}
    if (! isset($c_offline)) {$c_offline = 'offline';}

    if (! isset($_GET['praticien_id'])) {
    exit($translations['praticien_non_precise']);
    }

    $praticien_id  = intval($_GET['praticien_id']);
    $client_id     = $_SESSION['reference_id'] ?? null;
    $page          = isset($_GET['page']) ? max(1, (int) $_GET['page']) : 1;
    $limit_columns = 5;

    // Infos praticien (+ adresse pour décider des radios)
    $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 (! $duree_minutes) {
    die($translations['duree_rdv_non_definie']);
    }

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

    // TZ + fenêtre 21 jours
    $tz    = new DateTimeZone('Europe/Paris');
    $now   = new DateTimeImmutable('now', $tz);
    $limit = $now->modify('+60 days'); // exclusif dans DatePeriod

    // Récupération des disponibilités HEBDO
    $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);

    // Récupération des disponibilités PONCTUELLES (dates)
    $stmt = $pdo->prepare(
    "SELECT date_dispo, heure_debut, heure_fin
   FROM disponibilite_date
   WHERE praticien_id = ?
     AND date_dispo BETWEEN ? AND ?
   ORDER BY date_dispo ASC, heure_debut ASC"
    );
    $stmt->execute([
    $praticien_id,
    $now->format('Y-m-d'),
    $limit->format('Y-m-d'),
    ]);
    $dispos_dates_raw = $stmt->fetchAll(PDO::FETCH_ASSOC);

    // Index par date (Y-m-d) pour accès rapide dans la boucle
    $dispos_dates_by_day = [];
    foreach ($dispos_dates_raw as $row) {
    $k                         = (string) $row['date_dispo']; // Y-m-d
    $dispos_dates_by_day[$k][] = $row;
    }

    // Récupération des rendez-vous réservés (prochains 21 jours) — on ignore les ANNULÉS
    $stmt = $pdo->prepare(
    "SELECT date_rdv
   FROM rendez_vous
   WHERE praticien_id = ?
     AND statut <> 'annulé'
     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()
    );

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

    // Si ta DB ne stocke pas en EN (lundi/Понедельник), normalise vers EN :
    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;
    }

    // Ici on stocke en SET pour fusionner sans doublons : [jourAffichage][slotKey] = DateTimeImmutable
    $creneaux_par_jour = [];

    $periode = new DatePeriod($now, new DateInterval('P1D'), $limit); // $limit exclusif
    $step    = new DateInterval("PT{$duree_minutes}M");

    foreach ($periode as $jour) {
    $dayKey  = strtolower($jour->format('l')); // monday..sunday
    $dateKey = $jour->format('Y-m-d');

    // Libellé traduit pour l'affichage
    $i18nKey  = $DAY_I18N[$dayKey] ?? null;
    $jour_nom = $i18nKey ? ($translations[$i18nKey] ?? ucfirst($dayKey)) : ucfirst($dayKey);

    // clé colonne (inchangée)
    $colKey = $jour_nom . '<br> ' . $jour->format('d/m');

    // --- 1) Dispos HEBDO ---
    foreach ($dispos as $dispo) {
        $dispoKey = normalize_day_key($dispo['jour_semaine'] ?? '');
        if ($dispoKey !== $dayKey) {
            continue;
        }

        // Parse HH:MM:SS
        [$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;
        }

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

            $slotKey = $t->format('Y-m-d H:i');
            if (! in_array($slotKey, $reservations, true)) {
                $creneaux_par_jour[$colKey][$slotKey] = $t; // SET
            }
        }
    }

    // --- 2) Dispos PONCTUELLES (par date) ---
    if (! empty($dispos_dates_by_day[$dateKey])) {
        foreach ($dispos_dates_by_day[$dateKey] as $row) {
            // Parse HH:MM:SS
            [$h1, $m1, $s1] = array_map('intval', explode(':', (string) $row['heure_debut']));
            [$h2, $m2, $s2] = array_map('intval', explode(':', (string) $row['heure_fin']));

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

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

                $slotKey = $t->format('Y-m-d H:i');
                if (! in_array($slotKey, $reservations, true)) {
                    $creneaux_par_jour[$colKey][$slotKey] = $t; // SET + fusion
                }
            }
        }
    }
    }

    // Convertir SET -> liste triée
    foreach ($creneaux_par_jour as $k => $set) {
    $slots = array_values($set);
    usort($slots, fn(DateTimeImmutable $a, DateTimeImmutable $b) => $a->getTimestamp() <=> $b->getTimestamp());
    $creneaux_par_jour[$k] = $slots;
    }

    // Pagination des colonnes
    $all_keys     = array_keys($creneaux_par_jour);
    $total_pages  = (int) ceil(count($all_keys) / $limit_columns);
    $offset       = ($page - 1) * $limit_columns;
    $visible_keys = array_slice($all_keys, $offset, $limit_columns);
    require_once '../includes/header.php';

    $PAGE_TITLE = $translations['creneaux_disponibles_title'] ?? 'Créneaux disponibles';
    $HEAD_EXTRA = <<<HTML
  <script src="/js/sweetalert2@11.js"></script>
HTML;
?>
<div class="main1">
<div class="container py-5">
 <div class="shadow p-4 rounded bg-light rdv-card">
  <h3 class="rdv-subtitle"><?php echo htmlspecialchars(($praticien['prenom'] ?? '') . ' ' . ($praticien['nom'] ?? '')) ?></h3>

  <?php if ($total_pages > 1): ?>
    <div class="pagination">
      <?php if ($page > 1): ?>
        <a href="?praticien_id=<?php echo $praticien_id ?>&page=<?php echo $page - 1 ?>">&laquo; <?php echo $translations['pagination_precedent'] ?></a>
      <?php endif; ?>
      <?php if ($page < $total_pages): ?>
        <a href="?praticien_id=<?php echo $praticien_id ?>&page=<?php echo $page + 1 ?>"><?php echo $translations['pagination_suivant'] ?> &raquo;</a>
      <?php endif; ?>
    </div>
  <?php endif; ?>

  <?php if (empty($creneaux_par_jour)): ?>
    <p class="rdv-empty"><?php echo $translations['aucun_creneau_disponible_3_semaines'] ?><br><br>
      <a class="btn btn-outline-secondary btn-sm btn-table" href="/messages/start.php?praticien_id=<?php echo $praticien_id ?>">
        <?php echo $translations['chat_praticien'] ?>
      </a></p>
  <?php else: ?>
    <center><a class="btn btn-outline-secondary btn-sm btn-table" href="/messages/start.php?praticien_id=<?php echo $praticien_id ?>">
        <?php echo $translations['chat_praticien'] ?>
      </a></center>
    <div class="grid-container">
      <?php foreach ($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';
            ?>
            <div class="slot">
              <div class="slot-time"><?php echo $c->format('H:i') ?></div>

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

              <a href="/public/client/valider_rdv.php?praticien_id=<?php echo $praticien_id ?>&start=<?php echo urlencode($startIso) ?>"
                 class="reserver-btn"
                 data-mode-name="<?php echo htmlspecialchars($has_address ? $slotName : '') ?>"
                 data-default-mode="<?php echo htmlspecialchars($c_online) ?>"
                 data-nom="<?php echo htmlspecialchars($praticien['nom'] ?? '') ?>"
                 data-prenom="<?php echo htmlspecialchars($praticien['prenom'] ?? '') ?>"
                 data-start="<?php echo htmlspecialchars($startIso) ?>">
                 <?php echo $translations['btn_reserver'] ?>
              </a>
            </div>
          <?php endforeach; ?>
        </div>
      <?php endforeach; ?>
    </div>
  <?php endif; ?>
 </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;

      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($translations['confirmation']) ?>,
        html: `<b>${prenom} ${nom}<br>${jour} <?php echo $translations['a'] ?> ${heure}</b>`,
        icon: 'question',
        showCancelButton: true,
        confirmButtonText: <?php echo json_encode($translations['btn_oui_reserver']) ?>,
        cancelButtonText: <?php echo json_encode($translations['btn_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>
</div>
  <footer class="site-footer">
    <div class="container">
      <p><?php echo $translations['copyr'] ?></p>
    </div>
  </footer>
</body>
</html>