<?php
require_once __DIR__ . '/auth.php';
require_once __DIR__ . '/../includes/layout.php';
admin_require_auth();

$db = get_db();
$error = '';
$msg = '';
$preview_videos = [];
$channel_input = trim($_POST['channel'] ?? '');
$limit = max(1, min(75, (int)($_POST['limit'] ?? 25)));
$published = isset($_POST['published']) || $_SERVER['REQUEST_METHOD'] !== 'POST';

function yt_http_get(string $url, int $timeout = 20): array {
    $headers = [
        'User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125 Safari/537.36',
        'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8',
        'Accept-Language: en-US,en;q=0.9',
    ];

    if (function_exists('curl_init')) {
        $ch = curl_init($url);
        curl_setopt_array($ch, [
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_FOLLOWLOCATION => true,
            CURLOPT_MAXREDIRS => 5,
            CURLOPT_CONNECTTIMEOUT => $timeout,
            CURLOPT_TIMEOUT => $timeout,
            CURLOPT_HTTPHEADER => $headers,
            CURLOPT_HEADER => true,
        ]);
        $raw = curl_exec($ch);
        $err = curl_error($ch);
        $code = (int)curl_getinfo($ch, CURLINFO_RESPONSE_CODE);
        $header_size = (int)curl_getinfo($ch, CURLINFO_HEADER_SIZE);
        $content_type = (string)curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
        curl_close($ch);

        if (!is_string($raw) || $raw === '') {
            return ['body' => '', 'code' => $code, 'content_type' => $content_type, 'error' => $err ?: 'Empty response.'];
        }

        return [
            'body' => substr($raw, $header_size),
            'code' => $code,
            'content_type' => $content_type,
            'error' => $code >= 400 ? 'HTTP ' . $code : '',
        ];
    }

    $context = stream_context_create([
        'http' => [
            'method' => 'GET',
            'header' => implode("\r\n", $headers),
            'timeout' => $timeout,
            'ignore_errors' => true,
        ],
    ]);
    $body = @file_get_contents($url, false, $context);
    $response_headers = $http_response_header ?? [];
    $code = 0;
    $content_type = '';
    foreach ($response_headers as $header) {
        if (preg_match('#^HTTP/\S+\s+(\d+)#', $header, $m)) $code = (int)$m[1];
        if (stripos($header, 'Content-Type:') === 0) $content_type = trim(substr($header, 13));
    }

    return [
        'body' => is_string($body) ? $body : '',
        'code' => $code,
        'content_type' => $content_type,
        'error' => $code >= 400 ? 'HTTP ' . $code : (!is_string($body) ? 'Unable to fetch URL.' : ''),
    ];
}

function yt_channel_videos_url(string $input): string {
    $input = trim($input);
    if ($input === '') return '';

    if (!preg_match('#^https?://#i', $input)) {
        if (str_starts_with($input, '@')) {
            return 'https://www.youtube.com/@' . rawurlencode(ltrim($input, '@')) . '/videos';
        }
        if (preg_match('/^UC[A-Za-z0-9_-]{20,}$/', $input)) {
            return 'https://www.youtube.com/channel/' . rawurlencode($input) . '/videos';
        }
        return 'https://www.youtube.com/@' . rawurlencode(ltrim($input, '@/')) . '/videos';
    }

    $parts = @parse_url($input);
    if (!is_array($parts) || empty($parts['host'])) return '';
    $host = strtolower((string)$parts['host']);
    if (!media_host_matches($host, 'youtube.com')) return '';

    $path = '/' . trim((string)($parts['path'] ?? ''), '/');
    if ($path === '/') return '';
    if (preg_match('#^/watch#', $path)) return '';

    if (!preg_match('#/videos/?$#', $path)) {
        $path = rtrim($path, '/') . '/videos';
    }

    return 'https://www.youtube.com' . $path;
}

function yt_json_object_at(string $text, int $start): string {
    $depth = 0;
    $in_string = false;
    $escaped = false;
    $length = strlen($text);

    for ($i = $start; $i < $length; $i++) {
        $ch = $text[$i];
        if ($in_string) {
            if ($escaped) {
                $escaped = false;
            } elseif ($ch === '\\') {
                $escaped = true;
            } elseif ($ch === '"') {
                $in_string = false;
            }
            continue;
        }

        if ($ch === '"') {
            $in_string = true;
        } elseif ($ch === '{') {
            $depth++;
        } elseif ($ch === '}') {
            $depth--;
            if ($depth === 0) {
                return substr($text, $start, $i - $start + 1);
            }
        }
    }

    return '';
}

function yt_extract_initial_data(string $html): ?array {
    foreach (['var ytInitialData =', 'ytInitialData ='] as $marker) {
        $pos = strpos($html, $marker);
        if ($pos === false) continue;
        $start = strpos($html, '{', $pos);
        if ($start === false) continue;
        $json = yt_json_object_at($html, $start);
        if ($json === '') continue;
        $data = json_decode($json, true);
        if (is_array($data)) return $data;
    }
    return null;
}

function yt_text($value): string {
    if (is_string($value)) return trim($value);
    if (!is_array($value)) return '';
    if (isset($value['simpleText'])) return trim((string)$value['simpleText']);
    if (isset($value['content'])) return trim((string)$value['content']);
    if (isset($value['text'])) return trim((string)$value['text']);
    if (isset($value['label'])) return trim((string)$value['label']);
    if (isset($value['accessibilityLabel'])) return trim((string)$value['accessibilityLabel']);
    if (isset($value['runs']) && is_array($value['runs'])) {
        $parts = [];
        foreach ($value['runs'] as $run) {
            if (isset($run['text'])) $parts[] = (string)$run['text'];
        }
        return trim(implode('', $parts));
    }
    if (isset($value['accessibility']['accessibilityData']['label'])) {
        return trim((string)$value['accessibility']['accessibilityData']['label']);
    }
    return '';
}

function yt_video_id(string $value): string {
    $value = trim($value);
    if (preg_match('/^[A-Za-z0-9_-]{11}$/', $value)) return $value;
    return '';
}

function yt_best_thumbnail(array $renderer): string {
    $thumbs = $renderer['thumbnail']['thumbnails'] ?? [];
    if (!is_array($thumbs) || empty($thumbs)) return '';
    usort($thumbs, fn($a, $b) => (int)($b['width'] ?? 0) <=> (int)($a['width'] ?? 0));
    return isset($thumbs[0]['url']) ? html_entity_decode((string)$thumbs[0]['url'], ENT_QUOTES | ENT_HTML5, 'UTF-8') : '';
}

function yt_collect_thumbnail_candidates($node, array &$candidates): void {
    if (!is_array($node)) return;

    if (isset($node['url']) && is_string($node['url'])) {
        $url = html_entity_decode($node['url'], ENT_QUOTES | ENT_HTML5, 'UTF-8');
        if (preg_match('#https?://[^"\']*(?:ytimg|ggpht)[^"\']*#i', $url)) {
            $candidates[] = [
                'url' => $url,
                'width' => (int)($node['width'] ?? 0),
                'score' => str_contains($url, 'i.ytimg.com') ? 2 : 1,
            ];
        }
    }

    foreach ($node as $value) {
        if (is_array($value)) yt_collect_thumbnail_candidates($value, $candidates);
    }
}

function yt_best_thumbnail_any(array $node, string $video_id = ''): string {
    $candidates = [];
    yt_collect_thumbnail_candidates($node, $candidates);
    if ($candidates) {
        usort($candidates, fn($a, $b) => (($b['score'] <=> $a['score']) ?: ($b['width'] <=> $a['width'])));
        return $candidates[0]['url'];
    }

    return $video_id !== '' ? 'https://i.ytimg.com/vi/' . rawurlencode($video_id) . '/hqdefault.jpg' : '';
}

function yt_duration_seconds(string $duration): int {
    $duration = trim($duration);
    if ($duration === '' || stripos($duration, 'live') !== false) return 0;
    if (preg_match('/^\d+(?::\d+)+$/', $duration)) {
        $parts = array_map('intval', explode(':', $duration));
        $seconds = 0;
        foreach ($parts as $part) $seconds = ($seconds * 60) + $part;
        return $seconds;
    }

    $seconds = 0;
    if (preg_match('/(\d+)\s*h/i', $duration, $m)) $seconds += (int)$m[1] * 3600;
    if (preg_match('/(\d+)\s*m/i', $duration, $m)) $seconds += (int)$m[1] * 60;
    if (preg_match('/(\d+)\s*s/i', $duration, $m)) $seconds += (int)$m[1];
    return $seconds;
}

function yt_renderer_duration(array $renderer): string {
    $duration = yt_text($renderer['lengthText'] ?? []);
    if ($duration !== '') return $duration;
    foreach (($renderer['thumbnailOverlays'] ?? []) as $overlay) {
        $text = yt_text($overlay['thumbnailOverlayTimeStatusRenderer']['text'] ?? []);
        if ($text !== '') return $text;
    }
    return '';
}

function yt_video_record(string $id, string $title, string $description = '', string $duration_text = '', string $thumbnail_url = ''): ?array {
    $id = yt_video_id($id);
    $title = trim($title);
    if ($id === '') return null;
    if ($title === '') $title = 'YouTube Video ' . $id;

    return [
        'id' => $id,
        'title' => $title,
        'description' => trim($description),
        'duration' => yt_duration_seconds($duration_text),
        'duration_text' => trim($duration_text),
        'thumbnail_url' => $thumbnail_url ?: 'https://i.ytimg.com/vi/' . rawurlencode($id) . '/hqdefault.jpg',
        'watch_url' => 'https://www.youtube.com/watch?v=' . rawurlencode($id),
    ];
}

function yt_string_at_path(array $node, array $path): string {
    $current = $node;
    foreach ($path as $key) {
        if (!is_array($current) || !array_key_exists($key, $current)) return '';
        $current = $current[$key];
    }
    return yt_text($current);
}

function yt_find_first_text_by_key($node, array $keys): string {
    if (!is_array($node)) return '';
    foreach ($keys as $key) {
        if (isset($node[$key])) {
            $text = yt_text($node[$key]);
            if ($text !== '') return $text;
        }
    }
    foreach ($node as $value) {
        if (is_array($value)) {
            $text = yt_find_first_text_by_key($value, $keys);
            if ($text !== '') return $text;
        }
    }
    return '';
}

function yt_video_from_reel_renderer(array $renderer): ?array {
    $id = yt_video_id((string)($renderer['videoId'] ?? ''));
    if ($id === '') return null;
    $title = yt_text($renderer['headline'] ?? []);
    if ($title === '') $title = yt_text($renderer['accessibility']['accessibilityData']['label'] ?? []);
    if ($title === '') $title = yt_find_first_text_by_key($renderer, ['title', 'headline']);
    $views = yt_text($renderer['viewCountText'] ?? []);
    $description = $views !== '' ? $views : '';
    return yt_video_record($id, $title, $description, '', yt_best_thumbnail_any($renderer, $id));
}

function yt_video_from_lockup_model(array $model): ?array {
    $id = yt_video_id((string)($model['contentId'] ?? $model['videoId'] ?? ''));
    if ($id === '') {
        $url = yt_find_first_text_by_key($model, ['url', 'webCommandMetadata']);
        if (preg_match('/(?:watch\?v=|shorts\/)([A-Za-z0-9_-]{11})/', $url, $m)) $id = $m[1];
    }
    if ($id === '') return null;

    $title = yt_string_at_path($model, ['metadata', 'lockupMetadataViewModel', 'title']);
    if ($title === '') $title = yt_find_first_text_by_key($model, ['title', 'headline', 'contentTitle']);

    $metadata = [];
    foreach (['metadata', 'subtitle', 'secondarySubtitle', 'viewCountText', 'publishedTimeText'] as $key) {
        $text = yt_find_first_text_by_key($model[$key] ?? [], ['content', 'simpleText', 'text']);
        if ($text !== '') $metadata[] = $text;
    }

    $duration = yt_find_first_text_by_key($model, ['duration', 'lengthText', 'thumbnailOverlayTimeStatusRenderer']);
    if ($duration !== '' && !preg_match('/\d/', $duration)) $duration = '';

    return yt_video_record($id, $title, implode("\n", array_unique($metadata)), $duration, yt_best_thumbnail_any($model, $id));
}

function yt_add_video(array $video, array &$videos, array &$seen, int $limit): void {
    if (isset($seen[$video['id']]) || count($videos) >= $limit) return;
    $seen[$video['id']] = true;
    $videos[] = $video;
}

function yt_collect_video_items($node, array &$videos, array &$seen, int $limit): void {
    if (!is_array($node)) return;
    if (count($videos) >= $limit) return;

    foreach (['videoRenderer', 'gridVideoRenderer', 'compactVideoRenderer'] as $key) {
        if (isset($node[$key]) && is_array($node[$key]) && !empty($node[$key]['videoId'])) {
            $video = yt_video_from_renderer($node[$key]);
            if ($video) yt_add_video($video, $videos, $seen, $limit);
        }
    }

    if (isset($node['reelItemRenderer']) && is_array($node['reelItemRenderer'])) {
        $video = yt_video_from_reel_renderer($node['reelItemRenderer']);
        if ($video) yt_add_video($video, $videos, $seen, $limit);
    }

    if (isset($node['lockupViewModel']) && is_array($node['lockupViewModel'])) {
        $video = yt_video_from_lockup_model($node['lockupViewModel']);
        if ($video) yt_add_video($video, $videos, $seen, $limit);
    }

    foreach ($node as $value) {
        if (is_array($value)) yt_collect_video_items($value, $videos, $seen, $limit);
        if (count($videos) >= $limit) return;
    }
}

function yt_video_from_renderer(array $renderer): ?array {
    $id = media_clean_token((string)($renderer['videoId'] ?? ''));
    if ($id === '') return null;

    $title = yt_text($renderer['title'] ?? []);
    if ($title === '') return null;

    $duration_text = yt_renderer_duration($renderer);
    $snippet = yt_text($renderer['descriptionSnippet'] ?? []);
    $published = yt_text($renderer['publishedTimeText'] ?? []);
    $views = yt_text($renderer['viewCountText'] ?? []);
    $description_parts = array_filter([$snippet, trim($published . ($published && $views ? ' - ' : '') . $views)]);

    return yt_video_record($id, $title, implode("\n", $description_parts), $duration_text, yt_best_thumbnail($renderer));
}

function yt_title_near_video_id(string $html, string $id): string {
    $quoted_id = preg_quote($id, '/');
    $patterns = [
        '/"videoId":"' . $quoted_id . '".{0,5000}?"title":\{"runs":\[\{"text":"([^"]+)"/s',
        '/"videoId":"' . $quoted_id . '".{0,5000}?"title":\{"simpleText":"([^"]+)"/s',
        '/"title":\{"runs":\[\{"text":"([^"]+)"\}\]\}.{0,5000}?"videoId":"' . $quoted_id . '"/s',
        '/"title":\{"simpleText":"([^"]+)"\}.{0,5000}?"videoId":"' . $quoted_id . '"/s',
    ];
    foreach ($patterns as $pattern) {
        if (preg_match($pattern, $html, $m)) {
            $decoded = json_decode('"' . str_replace('"', '\"', $m[1]) . '"');
            return is_string($decoded) ? $decoded : html_entity_decode($m[1], ENT_QUOTES | ENT_HTML5, 'UTF-8');
        }
    }
    return '';
}

function yt_duration_near_video_id(string $html, string $id): string {
    $quoted_id = preg_quote($id, '/');
    $patterns = [
        '/"videoId":"' . $quoted_id . '".{0,5000}?"lengthText":\{"[^}]*"simpleText":"([^"]+)"/s',
        '/"lengthText":\{"[^}]*"simpleText":"([^"]+)".{0,5000}?"videoId":"' . $quoted_id . '"/s',
    ];
    foreach ($patterns as $pattern) {
        if (preg_match($pattern, $html, $m)) return html_entity_decode($m[1], ENT_QUOTES | ENT_HTML5, 'UTF-8');
    }
    return '';
}

function yt_videos_from_html(string $html, int $limit): array {
    preg_match_all('/(?:watch\?v=|shorts\/|embed\/|\"videoId\":\")([A-Za-z0-9_-]{11})/', $html, $matches);
    $ids = array_values(array_unique($matches[1] ?? []));
    $videos = [];
    $seen = [];
    foreach ($ids as $id) {
        if (count($videos) >= $limit) break;
        $title = yt_title_near_video_id($html, $id);
        $duration = yt_duration_near_video_id($html, $id);
        $video = yt_video_record($id, $title, '', $duration, 'https://i.ytimg.com/vi/' . rawurlencode($id) . '/hqdefault.jpg');
        if ($video) yt_add_video($video, $videos, $seen, $limit);
    }
    return $videos;
}

function yt_channel_candidate_urls(string $url): array {
    return array_values(array_unique([
        $url,
        media_append_query($url, ['view' => '0', 'sort' => 'dd', 'flow' => 'grid']),
    ]));
}

function yt_scrape_channel_videos(string $input, int $limit): array {
    $url = yt_channel_videos_url($input);
    if ($url === '') {
        return ['url' => '', 'videos' => [], 'error' => 'Enter a YouTube channel URL, @handle, or UC channel ID.'];
    }

    $videos = [];
    $seen = [];
    $last_error = '';
    $found_initial_data = false;

    foreach (yt_channel_candidate_urls($url) as $candidate_url) {
        $fetch = yt_http_get($candidate_url);
        if ($fetch['body'] === '' || $fetch['error']) {
            $last_error = 'Could not fetch YouTube channel page. ' . $fetch['error'];
            continue;
        }

        $data = yt_extract_initial_data($fetch['body']);
        if ($data) {
            $found_initial_data = true;
            yt_collect_video_items($data, $videos, $seen, $limit);
        }

        if (count($videos) < $limit) {
            foreach (yt_videos_from_html($fetch['body'], $limit) as $video) {
                yt_add_video($video, $videos, $seen, $limit);
            }
        }

        if ($videos) break;
    }

    if (!$videos) {
        if (!$found_initial_data) {
            if ($last_error !== '') return ['url' => $url, 'videos' => [], 'error' => $last_error];
            return ['url' => $url, 'videos' => [], 'error' => 'Could not find ytInitialData or watch links in the scraped page. YouTube may have returned a consent, age gate, or bot-check page.'];
        }
        return ['url' => $url, 'videos' => [], 'error' => 'No importable videos were found. The channel may have no public videos, or YouTube may have served an unsupported layout.'];
    }

    return ['url' => $url, 'videos' => $videos, 'error' => ''];
}

function yt_download_thumbnail(string $url, string $slug): string {
    return media_download_thumbnail($url, $slug, 'yt');
}

function yt_import_videos(PDO $db, array $videos, array $selected_ids, bool $published): array {
    $selected = array_fill_keys($selected_ids, true);
    $inserted = 0;
    $skipped = 0;
    $errors = [];

    foreach ($videos as $video) {
        if (!isset($selected[$video['id']])) continue;

        $exists = $db->prepare("SELECT COUNT(*) FROM video_sources WHERE source_type='remote' AND source_url=?");
        $exists->execute([$video['watch_url']]);
        if ((int)$exists->fetchColumn() > 0) {
            $skipped++;
            continue;
        }

        try {
            $slug = make_slug($video['title']);
            $thumbnail = yt_download_thumbnail($video['thumbnail_url'], $slug);
            $published_at = media_youtube_publish_datetime($video['watch_url']);
            $video_params = [
                $video['title'],
                $video['description'],
                $slug,
                $thumbnail,
                (int)$video['duration'],
                0,
                $published ? 1 : 0,
            ];
            if ($published_at !== '') {
                $video_params[] = $published_at;
                $db->prepare("
                    INSERT INTO videos (title, description, slug, thumbnail, duration, sort_order, published, created_at, updated_at)
                    VALUES (?, ?, ?, ?, ?, ?, ?, ?, datetime('now'))
                ")->execute($video_params);
            } else {
                $db->prepare("
                    INSERT INTO videos (title, description, slug, thumbnail, duration, sort_order, published)
                    VALUES (?, ?, ?, ?, ?, ?, ?)
                ")->execute($video_params);
            }
            $video_id = (int)$db->lastInsertId();
            $db->prepare("
                INSERT INTO video_sources (video_id, label, source_type, file_path, source_url, mime_type, quality, sort_order)
                VALUES (?,?,?,?,?,?,?,?)
            ")->execute([
                $video_id,
                'YouTube',
                'remote',
                '',
                $video['watch_url'],
                source_storage_mime_from_url($video['watch_url']),
                '',
                0,
            ]);
            $inserted++;
        } catch (Throwable $e) {
            $errors[] = $video['title'] . ': ' . $e->getMessage();
        }
    }

    return ['inserted' => $inserted, 'skipped' => $skipped, 'errors' => $errors];
}

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $action = $_POST['action'] ?? 'preview';
    $scrape = yt_scrape_channel_videos($channel_input, $limit);
    $preview_videos = $scrape['videos'];
    if ($scrape['error']) $error = $scrape['error'];

    if ($action === 'import' && !$error) {
        $selected_ids = $_POST['video_ids'] ?? [];
        if (!is_array($selected_ids)) $selected_ids = [];
        $selected_ids = array_values(array_filter(array_map('media_clean_token', $selected_ids)));
        if (!$selected_ids) {
            $error = 'Select at least one scraped video to import.';
        } else {
            $result = yt_import_videos($db, $preview_videos, $selected_ids, $published);
            $msg = $result['inserted'] . ' imported';
            if ($result['skipped']) $msg .= ', ' . $result['skipped'] . ' skipped as duplicates';
            $msg .= '.';
            if ($result['errors']) $error = implode(' ', $result['errors']);
        }
    }
}

render_head('YouTube Importer — Admin', '
  .admin-layout { display:grid; grid-template-columns:1fr; gap:1.5rem; }
  @media(min-width:900px) { .admin-layout { grid-template-columns:220px 1fr; } }
  .admin-nav { background:var(--surface); border:1px solid var(--border); border-radius:calc(var(--r)+2px); padding:1.2rem; display:flex; flex-direction:column; gap:.4rem; align-self:start; position:sticky; top:1rem; }
  .admin-nav-label { font-family:"Share Tech Mono",monospace; font-size:.58rem; letter-spacing:.18em; text-transform:uppercase; color:var(--text-3); margin-bottom:.3rem; padding-left:.5rem; }
  .admin-nav a { display:flex; align-items:center; gap:.6rem; padding:.55rem .75rem; border-radius:var(--r); font-size:.82rem; color:var(--text-2); text-decoration:none; transition:background .15s,color .15s; }
  .admin-nav a:hover { background:rgba(255,255,255,.05); color:var(--text); }
  .admin-nav a.active { background:rgba(176,96,255,.12); color:var(--purple); }
  .nav-divider { border:none; border-top:1px solid var(--border); margin:.4rem 0; }
  .form-grid { display:grid; grid-template-columns:1fr; gap:1rem; }
  @media(min-width:720px) { .form-grid { grid-template-columns:minmax(0,1fr) 120px; } }
  .section-heading { font-family:"Share Tech Mono",monospace; font-size:.65rem; letter-spacing:.15em; text-transform:uppercase; color:var(--text-3); margin-bottom:.75rem; }
  .hint { font-size:.72rem; color:var(--text-3); margin-top:.2rem; line-height:1.5; }
  .video-import-list { display:flex; flex-direction:column; gap:.75rem; }
  .import-row { display:grid; grid-template-columns:auto 120px minmax(0,1fr); gap:.8rem; align-items:start; padding:.8rem; background:var(--surface-2); border:1px solid var(--border); border-radius:var(--r); }
  @media(max-width:640px) { .import-row { grid-template-columns:auto minmax(0,1fr); } .import-thumb { display:none; } }
  .import-thumb { width:120px; aspect-ratio:16/9; object-fit:cover; border-radius:4px; background:#000; border:1px solid var(--border-2); }
  .import-title { font-size:.86rem; font-weight:650; color:var(--text); line-height:1.35; }
  .import-meta { font-family:"Share Tech Mono",monospace; font-size:.62rem; color:var(--text-3); margin-top:.25rem; word-break:break-all; }
  .import-desc { font-size:.74rem; color:var(--text-3); line-height:1.45; margin-top:.35rem; }
');
?>
<main class="page" role="main">
  <header class="topbar">
    <div class="topbar-brand">
      <div>
        <div class="brand-name">Ty Clifford</div>
        <div class="brand-sub">admin / youtube importer</div>
      </div>
    </div>
    <nav class="topbar-social">
      <a class="social-pill" href="<?= h(public_absolute_url(public_home_url())) ?>" target="_blank">View Site</a>
      <a class="social-pill" href="logout.php">Logout</a>
    </nav>
  </header>

  <?php if ($msg): ?>
    <div class="notice notice-success"><?= h($msg) ?></div>
  <?php endif; ?>
  <?php if ($error): ?>
    <div class="notice notice-error"><?= h($error) ?></div>
  <?php endif; ?>

  <div class="admin-layout">
    <aside class="admin-nav">
      <div class="admin-nav-label">Navigation</div>
      <a href="index.php">Videos</a>
      <a href="add.php">Add Video</a>
      <a href="youtube_import.php" class="active">YouTube Importer</a>
      <hr class="nav-divider">
      <a href="settings.php">Settings</a>
    </aside>

    <div style="display:flex;flex-direction:column;gap:1rem;">
      <div>
        <p class="eyebrow eyebrow-purple" style="margin-bottom:.3rem">Scrape Channel</p>
        <h1 style="font-size:1.05rem;font-weight:700;color:var(--text);">YouTube Video Importer</h1>
      </div>

      <div class="card">
        <p class="section-heading">Channel Source</p>
        <form method="post" action="youtube_import.php">
          <input type="hidden" name="action" value="preview">
          <div class="form-grid">
            <div class="form-group">
              <label class="form-label" for="channel">Channel URL, @handle, or channel ID</label>
              <input class="form-input" type="text" id="channel" name="channel"
                     value="<?= h($channel_input) ?>"
                     placeholder="https://www.youtube.com/@channel/videos">
              <span class="hint">Scrapes the channel videos page and imports videos as YouTube embed sources. No YouTube API key is used.</span>
            </div>
            <div class="form-group">
              <label class="form-label" for="limit">Limit</label>
              <input class="form-input" type="number" id="limit" name="limit" value="<?= (int)$limit ?>" min="1" max="75">
            </div>
          </div>
          <div style="display:flex;align-items:center;justify-content:space-between;gap:.75rem;margin-top:1rem;flex-wrap:wrap;">
            <label style="display:flex;align-items:center;gap:.55rem;cursor:pointer;">
              <input type="checkbox" name="published" value="1" <?= $published ? 'checked' : '' ?>>
              <span class="form-label" style="margin:0">Publish imported videos</span>
            </label>
            <button class="btn btn-primary" type="submit">Scrape Videos</button>
          </div>
        </form>
      </div>

      <?php if ($preview_videos): ?>
        <div class="card">
          <p class="section-heading">Scraped Videos</p>
          <p class="hint">Review the scraped results, uncheck anything you do not want, then import. Duplicate YouTube URLs are skipped.</p>
          <form method="post" action="youtube_import.php">
            <input type="hidden" name="action" value="import">
            <input type="hidden" name="channel" value="<?= h($channel_input) ?>">
            <input type="hidden" name="limit" value="<?= (int)$limit ?>">
            <?php if ($published): ?><input type="hidden" name="published" value="1"><?php endif; ?>
            <div class="video-import-list">
              <?php foreach ($preview_videos as $video): ?>
                <label class="import-row">
                  <input type="checkbox" name="video_ids[]" value="<?= h($video['id']) ?>" checked>
                  <?php if ($video['thumbnail_url']): ?>
                    <img class="import-thumb" src="<?= h($video['thumbnail_url']) ?>" alt="">
                  <?php else: ?>
                    <div class="import-thumb"></div>
                  <?php endif; ?>
                  <span>
                    <span class="import-title"><?= h($video['title']) ?></span>
                    <span class="import-meta"><?= h($video['watch_url']) ?><?= $video['duration_text'] ? ' / ' . h($video['duration_text']) : '' ?></span>
                    <?php if ($video['description']): ?>
                      <span class="import-desc"><?= h($video['description']) ?></span>
                    <?php endif; ?>
                  </span>
                </label>
              <?php endforeach; ?>
            </div>
            <div style="display:flex;gap:.75rem;justify-content:flex-end;margin-top:1rem;flex-wrap:wrap;">
              <button class="btn btn-primary" type="submit">Import Selected</button>
            </div>
          </form>
        </div>
      <?php endif; ?>
    </div>
  </div>

  <?php render_footer(); ?>
</main>
</body>
</html>