<?php
require __DIR__ . '/auth.php';
mvlog_require_login();
$config = require __DIR__ . '/config.php';
header('Content-Type: application/json; charset=UTF-8');
header('Cache-Control: no-store, no-cache, must-revalidate, max-age=0');

function mvlog_job_status_log(string $message): void {
    $log = __DIR__ . '/logs/job_status_cleanup.log';
    $line = '[' . date('c') . '] ' . $message . "\n";
    @file_put_contents($log, $line, FILE_APPEND | LOCK_EX);
    @chmod($log, 0664);
}

function mvlog_worker_running(): bool {
    $out = [];
    $rc = 1;
    @exec('systemctl is-active --quiet mvlog-worker.service 2>/dev/null', $out, $rc);
    if ($rc === 0) return true;

    $ps = @shell_exec('ps -eo args= 2>/dev/null');
    if (!is_string($ps) || $ps === '') return false;
    foreach (explode("\n", $ps) as $line) {
        if (strpos($line, 'mvlog_worker.py') !== false && strpos($line, '--remote-root /var/www/html') !== false) {
            return true;
        }
    }
    return false;
}

function mvlog_rm_rf(string $path): void {
    if (!is_dir($path)) return;
    $items = scandir($path);
    if (!is_array($items)) return;
    foreach ($items as $item) {
        if ($item === '.' || $item === '..') continue;
        $child = $path . '/' . $item;
        if (is_dir($child) && !is_link($child)) mvlog_rm_rf($child);
        else @unlink($child);
    }
    @rmdir($path);
}

function mvlog_cleanup_stale_processing(string $dir, string $name, array $state, string $lockDir, bool $locked, string $status, string $articleId): array {
    $stateFile = $dir . '/.movmaker-state.json';
    $started = '';
    if (is_file($lockDir . '/started_at')) $started = trim((string)@file_get_contents($lockDir . '/started_at'));
    if ($started === '') $started = (string)($state['started_at'] ?? $state['updated_at'] ?? '');

    $backup = '';
    if (is_file($stateFile)) {
        $backup = $stateFile . '.bak.' . date('YmdHis');
        @copy($stateFile, $backup);
        @chmod($backup, 0664);
    }

    $state['status'] = 'error';
    $state['updated_at'] = gmdate('c');
    if ($articleId !== '') $state['article_id'] = $articleId;
    $state['message'] = 'Previous render appears abandoned: no mvlog-worker process is running; stale lock/processing state was cleaned by job_status.php. Re-enable Render to retry.';
    $json = json_encode($state, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT) . "\n";
    @file_put_contents($stateFile, $json, LOCK_EX);
    @chmod($stateFile, 0664);
    if ($locked) mvlog_rm_rf($lockDir);

    mvlog_job_status_log('cleaned stale processing job=' . $name . ' article_id=' . ($articleId ?: '-') . ' started_at=' . ($started ?: '-') . ' status=' . ($status ?: '-') . ' lock=' . ($locked ? 'yes' : 'no') . ' backup=' . ($backup ?: '-'));
    return $state;
}

$jobs = [];
$switches = [];
$cleaned = [];
$workerRunning = mvlog_worker_running();
$dirs = glob($config['uploads_dir'] . '/*', GLOB_ONLYDIR) ?: [];
foreach ($dirs as $dir) {
    $name = basename($dir);
    $stateFile = $dir . '/.movmaker-state.json';
    $lockDir = $dir . '/.movmaker-lock';
    $idFile = $dir . '/.mvlog-id';
    $state = is_file($stateFile) ? json_decode((string)file_get_contents($stateFile), true) : [];
    if (!is_array($state)) $state = [];
    $status = (string)($state['status'] ?? '');
    $articleId = strtolower((string)($state['article_id'] ?? ''));
    if ($articleId === '' && is_file($idFile)) $articleId = strtolower(trim((string)file_get_contents($idFile)));
    if (!preg_match('/^[0-9]{14}[a-f0-9]{16}$/', $articleId)) $articleId = '';
    $locked = is_dir($lockDir);

    if (!$workerRunning && ($locked || $status === 'processing')) {
        $state = mvlog_cleanup_stale_processing($dir, $name, $state, $lockDir, $locked, $status, $articleId);
        $status = (string)($state['status'] ?? '');
        $locked = is_dir($lockDir);
        $cleaned[] = ['dir' => $name, 'id' => $articleId, 'status' => $status];
    }

    $switches[] = [
        'dir' => $name,
        'id' => $articleId,
        'enabled' => is_file($dir . '/.movmaker-enabled'),
        'preview' => is_file($dir . '/.movmaker-preview'),
    ];

    if ($locked || $status === 'processing') {
        $started = '';
        if (is_file($lockDir . '/started_at')) $started = trim((string)file_get_contents($lockDir . '/started_at'));
        if ($started === '') $started = (string)($state['started_at'] ?? $state['updated_at'] ?? '');
        $jobs[] = [
            'name' => $name,
            'id' => $articleId,
            'status' => $status ?: ($locked ? 'processing' : 'unknown'),
            'started_at' => $started,
        ];
    }
}
echo json_encode(['jobs' => $jobs, 'switches' => $switches, 'cleaned' => $cleaned, 'worker_running' => $workerRunning, 'checked_at' => date('c')], JSON_UNESCAPED_UNICODE);