<?php
require_once __DIR__ . "/../../config/bootstrap.php";
require_once __DIR__ . '/../../src/AdminAuth.php';
AdminAuth::requireLogin();

if (empty($_SESSION['csrf_token'])) {
    $_SESSION['csrf_token'] = bin2hex(random_bytes(32));
}

$pageTitle = "Liste des TFE";
require_once __DIR__ . '/../../src/Database.php';

// ── CSV Import (inline, submitted to this same page) ─────────────────────────
$importMessage = '';
$importErrors  = [];
$importResults = [];
$importDone    = false;

if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_FILES['csv_file'])) {
    if (!isset($_POST['csrf_token']) || !hash_equals($_SESSION['csrf_token'], $_POST['csrf_token'])) {
        $importErrors[] = "Erreur de sécurité : token invalide.";
    } else {
        $importedCount = 0;
        $skippedCount  = 0;
        try {
            $importDb  = new Database();
            $importPdo = $importDb->getPDO();

            if ($_FILES['csv_file']['error'] !== UPLOAD_ERR_OK) {
                throw new Exception("Erreur lors du téléversement du fichier.");
            }

            $handle = fopen($_FILES['csv_file']['tmp_name'], 'r');
            if (!$handle) throw new Exception("Impossible d'ouvrir le fichier CSV.");

            fgetcsv($handle, 0, ',', '"', '');
            fgetcsv($handle, 0, ',', '"', '');
            fgetcsv($handle, 0, ',', '"', '');
            fgetcsv($handle, 0, ',', '"', ''); // skip 4 header rows

            $orientationMap = [
                'SC'=>'Sculpture','VI'=>'Vidéographie','CA'=>"Cinéma d'animation",
                'IP'=>'Installation-Performance','PE'=>'Peinture','PH'=>'Photographie',
                'DE'=>'Dessin','AN'=>'Arts Numériques','GR'=>'Graphisme',
                'TY'=>'Typographie','DN'=>'Design Numérique','IL'=>'Illustration',
                'BD'=>'Bande-Dessinée','SE'=>'Sérigraphie','GV'=>'Gravure',
            ];

            $lineNumber = 5;
            while (($row = fgetcsv($handle, 0, ',', '"', '')) !== false) {
                $lineNumber++;
                if (empty($row[0]) && empty($row[1])) continue;
                try {
                    $importDb->beginTransaction();

                    $identifier      = trim($row[0]  ?? '');
                    $title           = trim($row[1]  ?? '');
                    $subtitle        = trim($row[2]  ?? '');
                    $authorsRaw      = trim($row[3]  ?? '');
                    $contact         = trim($row[4]  ?? '');
                    $supervisorsRaw  = trim($row[5]  ?? '');
                    $formatsRaw      = trim($row[6]  ?? '');
                    $year            = intval($row[7] ?? 0);
                    $apCode          = trim($row[8]  ?? '');
                    $orientationCode = trim($row[9]  ?? '');
                    $finalityName    = trim($row[10] ?? '');
                    $keywordsRaw     = trim($row[11] ?? '');
                    $synopsis        = trim($row[12] ?? '');
                    $context         = trim($row[13] ?? '');
                    $remarks         = trim($row[14] ?? '');
                    $languageRaw     = trim($row[15] ?? '');
                    $access          = trim($row[16] ?? '');
                    $license         = trim($row[17] ?? '');
                    $sizeInfo        = trim($row[18] ?? '');
                    $juryPoints      = !empty($row[19]) ? floatval($row[19]) : null;
                    $baiuLink        = trim($row[20] ?? '');

                    if (empty($title) || empty($year)) throw new Exception("Titre et année requis.");

                    $orientationName = $orientationMap[$orientationCode] ?? null;
                    $orientationId   = null;
                    if ($orientationName) {
                        $s = $importPdo->prepare("SELECT id FROM orientations WHERE name = ?");
                        $s->execute([$orientationName]);
                        $r = $s->fetch(); $orientationId = $r ? $r['id'] : null;
                    }

                    $apProgramId = null;
                    if (!empty($apCode)) {
                        $s = $importPdo->prepare("SELECT id FROM ap_programs WHERE code = ?");
                        $s->execute([$apCode]);
                        $r = $s->fetch(); $apProgramId = $r ? $r['id'] : null;
                    }

                    $finalityId = null;
                    if (!empty($finalityName)) {
                        $s = $importPdo->prepare("SELECT id FROM finality_types WHERE name = ?");
                        $s->execute([$finalityName]);
                        $r = $s->fetch(); $finalityId = $r ? $r['id'] : null;
                    }

                    $accessTypeId = null;
                    if (!empty($access)) {
                        $s = $importPdo->prepare("SELECT id FROM access_types WHERE name = ?");
                        $s->execute([ucfirst(strtolower($access))]);
                        $r = $s->fetch(); $accessTypeId = $r ? $r['id'] : null;
                    }
                    if ($accessTypeId === null) $accessTypeId = 1;

                    if (!empty($identifier)) {
                        $s = $importPdo->prepare("SELECT id FROM theses WHERE identifier = ?");
                        $s->execute([$identifier]);
                        if ($s->fetch()) {
                            $importDb->rollback();
                            $skippedCount++;
                            $importResults[] = ['type'=>'skip', 'msg'=>"Ligne $lineNumber: identifiant \"$identifier\" déjà présent, ignoré."];
                            continue;
                        }
                    }

                    $s = $importPdo->prepare("
                        INSERT INTO theses (
                            identifier, title, subtitle, year,
                            orientation_id, ap_program_id, finality_id,
                            synopsis, context_note, remarks,
                            file_size_info, jury_points, baiu_link,
                            access_type_id, is_published, submitted_at
                        ) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,1,CURRENT_TIMESTAMP)
                    ");
                    $s->execute([
                        !empty($identifier) ? $identifier : null, $title,
                        !empty($subtitle)   ? $subtitle   : null, $year,
                        $orientationId, $apProgramId, $finalityId,
                        !empty($synopsis)  ? $synopsis  : null,
                        !empty($context)   ? $context   : null,
                        !empty($remarks)   ? $remarks   : null,
                        !empty($sizeInfo)  ? $sizeInfo  : null,
                        $juryPoints,
                        !empty($baiuLink)  ? $baiuLink  : null,
                        $accessTypeId,
                    ]);
                    $thesisId = $importPdo->lastInsertId();

                    if (!empty($authorsRaw)) {
                        foreach (array_map('trim', explode(',', $authorsRaw)) as $idx => $name) {
                            if ($name) {
                                $aId = $importDb->findOrCreateAuthor($name, $idx === 0 ? $contact : null);
                                $s = $importPdo->prepare("INSERT INTO thesis_authors (thesis_id, author_id, author_order) VALUES (?,?,?)");
                                $s->execute([$thesisId, $aId, $idx + 1]);
                            }
                        }
                    }
                    if (!empty($supervisorsRaw)) {
                        foreach (array_map('trim', explode(',', $supervisorsRaw)) as $idx => $name) {
                            if ($name) {
                                $sId = $importDb->findOrCreateSupervisor($name);
                                $s = $importPdo->prepare("INSERT INTO thesis_supervisors (thesis_id, supervisor_id, supervisor_order) VALUES (?,?,?)");
                                $s->execute([$thesisId, $sId, $idx + 1]);
                            }
                        }
                    }
                    if (!empty($keywordsRaw)) {
                        foreach (array_slice(array_map('trim', explode(',', $keywordsRaw)), 0, 10) as $kw) {
                            if ($kw) {
                                $tId = $importDb->findOrCreateTag($kw);
                                if ($tId) {
                                    $s = $importPdo->prepare("INSERT INTO thesis_tags (thesis_id, tag_id) VALUES (?,?)");
                                    $s->execute([$thesisId, $tId]);
                                }
                            }
                        }
                    }
                    if (!empty($languageRaw)) {
                        $s = $importPdo->prepare("SELECT id FROM languages WHERE name = ?");
                        $s->execute([ucfirst(strtolower($languageRaw))]);
                        $r = $s->fetch();
                        if ($r) {
                            $s2 = $importPdo->prepare("INSERT INTO thesis_languages (thesis_id, language_id) VALUES (?,?)");
                            $s2->execute([$thesisId, $r['id']]);
                        }
                    }
                    if (!empty($formatsRaw)) {
                        foreach (array_map('trim', explode(',', $formatsRaw)) as $fmt) {
                            if ($fmt) {
                                $s = $importPdo->prepare("SELECT id FROM format_types WHERE name = ?");
                                $s->execute([ucfirst(strtolower($fmt))]);
                                $r = $s->fetch();
                                if ($r) {
                                    $s2 = $importPdo->prepare("INSERT INTO thesis_formats (thesis_id, format_id) VALUES (?,?)");
                                    $s2->execute([$thesisId, $r['id']]);
                                }
                            }
                        }
                    }

                    $importDb->commit();
                    $importedCount++;
                    $importResults[] = ['type'=>'ok', 'msg'=>"\"$title\" (ID: $thesisId)"];

                } catch (Exception $e) {
                    $importDb->rollback();
                    $skippedCount++;
                    $importResults[] = ['type'=>'error', 'msg'=>"Ligne $lineNumber: " . $e->getMessage()];
                    error_log("Import error on line $lineNumber: " . $e->getMessage());
                }
            }
            fclose($handle);
            $importMessage = "Import terminé : $importedCount TFE importés, $skippedCount ignorés.";
            $importDone = true;
        } catch (Exception $e) {
            $importErrors[] = $e->getMessage();
            error_log("CSV import error: " . $e->getMessage());
        }
    }
    $_SESSION['csrf_token'] = bin2hex(random_bytes(32));
}

try {
    $db = new Database();
    $searchQuery       = isset($_GET['search'])      ? trim($_GET['search'])       : '';
    $yearFilter        = isset($_GET['year'])         ? intval($_GET['year'])        : null;
    $orientationFilter = isset($_GET['orientation']) ? intval($_GET['orientation']) : null;
    $apFilter          = isset($_GET['ap'])           ? intval($_GET['ap'])          : null;

    $filters = [];
    if ($searchQuery)       $filters['search']      = $searchQuery;
    if ($yearFilter)        $filters['year']        = $yearFilter;
    if ($orientationFilter) $filters['orientation'] = $orientationFilter;
    if ($apFilter)          $filters['ap']          = $apFilter;

    $perPage    = 25;
    $page       = isset($_GET['page']) ? max(1, intval($_GET['page'])) : 1;
    $totalCount = $db->getThesesListCount($filters);
    $totalPages = $totalCount > 0 ? (int) ceil($totalCount / $perPage) : 1;
    $page       = min($page, $totalPages);
    $offset     = ($page - 1) * $perPage;

    $theses       = $db->getThesesList($filters, $perPage, $offset);
    $stats        = $db->getThesesStats();
    $years        = $db->getAllYears();
    $orientations = $db->getAllOrientations();
    $apPrograms   = $db->getAllAPPrograms();
} catch (Exception $e) {
    error_log("Error loading theses list: " . $e->getMessage());
    die("Erreur lors du chargement de la liste.");
}
?>
<?php $isAdmin = true; $bodyClass = 'admin-body'; require_once APP_ROOT . '/templates/head.php'; ?>
    <?php include APP_ROOT . '/templates/header.php'; ?>

<script>
function toggleAll(src) {
    document.querySelectorAll('input[name="selected_theses[]"]').forEach(cb => cb.checked = src.checked);
    updateBulk();
}
function updateBulk() {
    const checked = document.querySelectorAll('input[name="selected_theses[]"]:checked');
    const bulk = document.getElementById('bulk-actions');
    document.getElementById('selected-count').textContent = checked.length;
    bulk.style.display = checked.length > 0 ? 'flex' : 'none';
}
function bulkAction(action) {
    const checked = document.querySelectorAll('input[name="selected_theses[]"]:checked');
    if (!checked.length) { alert('Sélectionnez au moins un TFE.'); return; }
    const word = action === 'publish' ? 'publier' : 'dépublier';
    if (!confirm(`${word.charAt(0).toUpperCase()+word.slice(1)} ${checked.length} TFE(s) ?`)) return;
    document.getElementById('bulk-action-input').value = action;
    const container = document.getElementById('bulk-checkboxes');
    container.innerHTML = '';
    checked.forEach(cb => {
        const inp = document.createElement('input');
        inp.type = 'hidden'; inp.name = 'selected_theses[]'; inp.value = cb.value;
        container.appendChild(inp);
    });
    document.getElementById('bulk-form').submit();
}
document.addEventListener('DOMContentLoaded', () => {
    document.querySelectorAll('input[name="selected_theses[]"]').forEach(cb => cb.addEventListener('change', updateBulk));
});
</script>

<main id="main-content">
    <?php include APP_ROOT . '/templates/partials/flash-messages.php'; ?>

    <!-- Title + filters + stats + import all in one toolbar row -->
    <div class="admin-list-toolbar">
        <h1>Liste des TFE</h1>

        <form class="admin-filters" method="get" action="/admin/">
            <input type="text" name="search" placeholder="Titre, auteur..."
                   value="<?= htmlspecialchars($searchQuery) ?>">
            <select name="year">
                <option value="">Année</option>
                <?php foreach ($years as $y): ?>
                    <option value="<?= $y ?>" <?= $yearFilter == $y ? 'selected' : '' ?>><?= $y ?></option>
                <?php endforeach; ?>
            </select>
            <select name="orientation">
                <option value="">Orientation</option>
                <?php foreach ($orientations as $o): ?>
                    <option value="<?= $o['id'] ?>" <?= $orientationFilter == $o['id'] ? 'selected' : '' ?>>
                        <?= htmlspecialchars($o['name']) ?>
                    </option>
                <?php endforeach; ?>
            </select>
            <select name="ap">
                <option value="">AP</option>
                <?php foreach ($apPrograms as $ap): ?>
                    <option value="<?= $ap['id'] ?>" <?= $apFilter == $ap['id'] ? 'selected' : '' ?>>
                        <?= htmlspecialchars($ap['name']) ?>
                    </option>
                <?php endforeach; ?>
            </select>
            <button type="submit" class="admin-filters-btn">Filtrer</button>
            <?php if ($searchQuery || $yearFilter || $orientationFilter || $apFilter): ?>
                <button type="button" class="admin-filters-reset"
                        onclick="window.location='/admin/'">&#x2715; Réinitialiser</button>
            <?php endif; ?>
        </form>

        <div class="admin-list-toolbar__right">
            <dl class="admin-stats">
                <div class="admin-stat">
                    <dt class="admin-stat__label">Total</dt>
                    <dd class="admin-stat__number"><?= $stats['total'] ?></dd>
                </div>
                <div class="admin-stat">
                    <dt class="admin-stat__label">Publiés</dt>
                    <dd class="admin-stat__number"><?= $stats['published'] ?></dd>
                </div>
                <div class="admin-stat">
                    <dt class="admin-stat__label">Attente</dt>
                    <dd class="admin-stat__number"><?= $stats['pending'] ?></dd>
                </div>
            </dl>
            <button type="button" class="admin-btn admin-btn--sm" id="import-dialog-btn"
                    onclick="document.getElementById('import-dialog').showModal()">
                Importer un CSV
            </button>
        </div>
    </div>

    <!-- Bulk actions bar -->
    <div id="bulk-actions" class="admin-bulk-actions" role="toolbar" aria-label="Actions groupées">
        <strong><span id="selected-count">0</span> TFE(s) sélectionné(s)</strong>
        <div class="admin-bulk-btns">
            <button type="button" class="admin-btn-sm admin-btn-publish" onclick="bulkAction('publish')">Publier</button>
            <button type="button" class="admin-btn-sm admin-btn-unpublish" onclick="bulkAction('unpublish')">Dépublier</button>
        </div>
    </div>

    <form id="bulk-form" method="post" action="actions/publish.php">
        <input type="hidden" name="csrf_token" value="<?= htmlspecialchars($_SESSION['csrf_token']) ?>">
        <input type="hidden" id="bulk-action-input" name="action" value="">
        <input type="hidden" name="bulk" value="1">
        <div id="bulk-checkboxes"></div>
    </form>

    <!-- Table -->
    <?php if (empty($theses)): ?>
        <p class="admin-empty">Aucun TFE trouvé.</p>
    <?php else: ?>
    <p class="admin-list-meta">
        <?php
        $from = $offset + 1;
        $to   = min($offset + $perPage, $totalCount);
        if ($totalPages > 1) {
            echo "$from–$to sur $totalCount TFE";
        } else {
            echo "$totalCount TFE";
        }
        ?>
    </p>
    <table>
        <thead>
            <tr>
                <th scope="col"><input type="checkbox" onchange="toggleAll(this)"></th>
                <th scope="col">ID</th>
                <th scope="col">Titre</th>
                <th scope="col">Auteur(s)</th>
                <th scope="col">Année</th>
                <th scope="col">Orientation</th>
                <th scope="col">AP</th>
                <th scope="col">Statut</th>
                <th scope="col">Actions</th>
            </tr>
        </thead>
        <tbody>
            <?php foreach ($theses as $thesis): ?>
            <tr>
                <td><input type="checkbox" name="selected_theses[]" value="<?= $thesis['id'] ?>"></td>
                <td class="admin-table-id"><?= htmlspecialchars($thesis['identifier'] ?? $thesis['id']) ?></td>
                <td>
                    <div class="thesis-title"><?= htmlspecialchars($thesis['title']) ?></div>
                    <?php if ($thesis['subtitle']): ?>
                        <div class="thesis-subtitle"><?= htmlspecialchars($thesis['subtitle']) ?></div>
                    <?php endif; ?>
                </td>
                <td><?= htmlspecialchars($thesis['authors'] ?? 'N/A') ?></td>
                <td><?= $thesis['year'] ?></td>
                <td><?= htmlspecialchars($thesis['orientation'] ?? 'N/A') ?></td>
                <td><?= htmlspecialchars($thesis['ap_program'] ?? 'N/A') ?></td>
                <td>
                    <?php $badgeType = 'publish'; $badgeValue = $thesis['is_published']; include APP_ROOT . '/templates/partials/status-badge.php'; ?>
                    <?php if (!empty($thesis['access_type'])): ?>
                    <br><?php $badgeType = 'access'; $badgeValue = $thesis['access_type']; include APP_ROOT . '/templates/partials/status-badge.php'; ?>
                    <?php endif; ?>
                </td>
                <td>
                    <div class="admin-actions">
                        <a href="/admin/thanks.php?id=<?= $thesis['id'] ?>" class="admin-btn-sm admin-btn-view">Voir</a>
                        <a href="/admin/edit.php?id=<?= $thesis['id'] ?>" class="admin-btn-sm admin-btn-edit">Éditer</a>
                        <form method="post" action="actions/publish.php" class="publish-form">
                            <input type="hidden" name="csrf_token" value="<?= htmlspecialchars($_SESSION['csrf_token']) ?>">
                            <input type="hidden" name="thesis_id" value="<?= $thesis['id'] ?>">
                            <?php if ($thesis['is_published']): ?>
                                <input type="hidden" name="action" value="unpublish">
                                <button type="submit" class="admin-btn-sm admin-btn-unpublish"
                                        onclick="return confirm('Retirer de la publication ?')">Dépublier</button>
                            <?php else: ?>
                                <input type="hidden" name="action" value="publish">
                                <button type="submit" class="admin-btn-sm admin-btn-publish">Publier</button>
                            <?php endif; ?>
                        </form>
                    </div>
                </td>
            </tr>
            <?php endforeach; ?>
        </tbody>
    </table>
    <?php endif; ?>

    <?php
    $baseParams = array_filter([
        'search'      => $searchQuery,
        'year'        => $yearFilter ?: '',
        'orientation' => $orientationFilter ?: '',
        'ap'          => $apFilter ?: '',
    ]);
    include APP_ROOT . '/templates/partials/pagination.php';
    ?>
</main>

<!-- ══════════════════════════════════════════════════════════════
     IMPORT DIALOG
══════════════════════════════════════════════════════════════ -->
<dialog id="import-dialog" class="admin-dialog" aria-labelledby="import-dialog-title">
    <div class="admin-dialog__header">
        <h2 id="import-dialog-title">Importer une liste de TFE</h2>
        <button type="button" class="admin-dialog__close" aria-label="Fermer"
                onclick="document.getElementById('import-dialog').close()">&#x2715;</button>
    </div>

    <?php if (!empty($importErrors)): ?>
    <div role="alert" data-type="error" class="admin-dialog__alert">
        <strong>⚠ Erreurs :</strong>
        <ul class="admin-error-list">
            <?php foreach ($importErrors as $err): ?>
                <li><?= htmlspecialchars($err) ?></li>
            <?php endforeach; ?>
        </ul>
    </div>
    <?php endif; ?>

    <?php if ($importMessage): ?>
    <p role="status" data-type="success">✓ <?= htmlspecialchars($importMessage) ?></p>
    <?php endif; ?>

    <form method="post" enctype="multipart/form-data" class="admin-form">
        <input type="hidden" name="csrf_token" value="<?= htmlspecialchars($_SESSION['csrf_token']) ?>">

        <div>
            <label for="csv_file">Fichier CSV</label>
            <div class="admin-file-input">
                <input type="file" id="csv_file" name="csv_file" accept=".csv" required>
                <small class="admin-file-hint">
                    Colonnes : Identifiant, Titre, Sous-titre, Auteur·ice(s), Contact, Promoteur·ice(s), Format, Année, AP, Orientation, Finalité, Mots-clés, Synopsis, Contexte, Remarques, Langue, Autorisation, License, taille, Points sur 20, lien BAIU<br>
                    Quatre premières lignes ignorées — Séparateur : virgule — UTF-8
                </small>
            </div>
        </div>

        <div class="admin-form-footer">
            <button type="submit" class="admin-btn">Importer</button>
            <button type="button" class="admin-btn-secondary"
                    onclick="document.getElementById('import-dialog').close()">Annuler</button>
        </div>
    </form>

    <?php if (!empty($importResults)): ?>
    <div class="admin-import-results">
        <h3 class="admin-import-results__title">Résultats</h3>
        <ul class="admin-import-log">
            <?php foreach ($importResults as $r): ?>
            <li class="admin-import-log__item admin-import-log__item--<?= $r['type'] ?>"><?= htmlspecialchars($r['msg']) ?></li>
            <?php endforeach; ?>
        </ul>
    </div>
    <?php endif; ?>
</dialog>

<?php if ($importDone || !empty($importErrors)): ?>
<script>document.getElementById('import-dialog').showModal();</script>
<?php endif; ?>

<?php require_once APP_ROOT . '/templates/admin/footer.php'; ?>