<?php
require_once __DIR__ . '/../config.php';
require_once __DIR__ . '/../../includes/auth.php';

header('Content-Type: application/json');
AuthMiddleware::requireAuth();

$action = $_GET['action'] ?? 'sessions';

function jf_get(string $path): array {
    $url = JELLYFIN_URL . $path . (str_contains($path, '?') ? '&' : '?') . 'api_key=' . JELLYFIN_API_KEY;
    $ctx = stream_context_create(['http' => ['timeout' => 5, 'ignore_errors' => true]]);
    $raw = @file_get_contents($url, false, $ctx);
    return $raw ? (json_decode($raw, true) ?? []) : [];
}

switch ($action) {
    case 'sessions':
        $sessions = jf_get('/Sessions');
        $active = array_filter($sessions, fn($s) => isset($s['NowPlayingItem']));
        $out = [];
        foreach ($active as $s) {
            $np = $s['NowPlayingItem'];
            $pos = $s['PlayState']['PositionTicks'] ?? 0;
            $dur = $np['RunTimeTicks'] ?? 0;
            $out[] = [
                'session_id'  => $s['Id'],
                'user'        => $s['UserName'] ?? 'Unknown',
                'device'      => $s['DeviceName'] ?? '',
                'client'      => $s['Client'] ?? '',
                'title'       => $np['Name'] ?? '',
                'type'        => $np['Type'] ?? '',
                'series'      => $np['SeriesName'] ?? null,
                'year'        => $np['ProductionYear'] ?? null,
                'paused'      => $s['PlayState']['IsPaused'] ?? false,
                'position_pct'=> $dur > 0 ? round($pos / $dur * 100) : 0,
            ];
        }
        echo json_encode(['sessions' => array_values($out), 'total_active' => count($out)]);
        break;

    case 'library':
        $movies  = jf_get('/Items?IncludeItemTypes=Movie&Recursive=true&Limit=0');
        $series  = jf_get('/Items?IncludeItemTypes=Series&Recursive=true&Limit=0');
        $episodes= jf_get('/Items?IncludeItemTypes=Episode&Recursive=true&Limit=0');
        echo json_encode([
            'movies'   => $movies['TotalRecordCount'] ?? 0,
            'series'   => $series['TotalRecordCount'] ?? 0,
            'episodes' => $episodes['TotalRecordCount'] ?? 0,
        ]);
        break;

    case 'search':
        $q = trim($_GET['q'] ?? '');
        if (!$q) { echo json_encode(['results' => []]); break; }
        $data = jf_get('/Search/Hints?SearchTerm=' . urlencode($q) . '&Limit=8&IncludeItemTypes=Movie,Series,Episode');
        $hints = $data['SearchHints'] ?? [];
        $results = array_map(fn($h) => [
            'id'    => $h['ItemId'],
            'name'  => $h['Name'],
            'type'  => $h['Type'],
            'year'  => $h['ProductionYear'] ?? null,
            'series'=> $h['Series'] ?? null,
        ], $hints);
        echo json_encode(['results' => $results]);
        break;

    case 'recent':
        $data = jf_get('/Items/Latest?Limit=8&IncludeItemTypes=Movie,Episode&Fields=Overview');
        $out = array_map(fn($i) => [
            'name'   => $i['Name'],
            'type'   => $i['Type'],
            'series' => $i['SeriesName'] ?? null,
            'year'   => $i['ProductionYear'] ?? null,
        ], is_array($data) ? $data : []);
        echo json_encode(['recent' => $out]);
        break;

    case 'control':
        $jfSessionId = $_GET['session_id'] ?? '';
        $jfCommand   = $_GET['command'] ?? '';
        // General commands supported by Jellyfin session control
        $allowed = ['TogglePause', 'Stop', 'NextTrack', 'PreviousTrack', 'VolumeUp', 'VolumeDown'];
        if (!$jfSessionId || !in_array($jfCommand, $allowed, true)) {
            // No session_id: get the first active session automatically
            if (!$jfSessionId && in_array($jfCommand, $allowed, true)) {
                $sessions = jf_get('/Sessions');
                foreach ($sessions as $s) {
                    if (isset($s['NowPlayingItem'])) { $jfSessionId = $s['Id']; break; }
                }
            }
            if (!$jfSessionId) { echo json_encode(['error' => 'No active session or invalid command']); break; }
        }
        $url = JELLYFIN_URL . '/Sessions/' . rawurlencode($jfSessionId) . '/Command/' . $jfCommand
             . '?api_key=' . JELLYFIN_API_KEY;
        $ctx = stream_context_create(['http' => [
            'method'  => 'POST',
            'timeout' => 5,
            'header'  => 'Content-Type: application/json',
            'content' => '{}',
            'ignore_errors' => true,
        ]]);
        @file_get_contents($url, false, $ctx);
        echo json_encode(['success' => true, 'command' => $jfCommand, 'session_id' => $jfSessionId]);
        break;

    default:
        echo json_encode(['error' => 'Unknown action']);
}