<?php
/**
 * Umbrix Update Manager - Version History API
 * Получение списка всех сохранённых версий (бэкапов)
 */

header('Access-Control-Allow-Origin: *');
header('Content-Type: application/json; charset=utf-8');

$backups_dir = __DIR__ . '/../';
$versions = [];

// Сканируем директорию на наличие бэкапов
$files = glob($backups_dir . 'latest.json.backup.*');

// Также добавляем текущую версию
if (file_exists($backups_dir . 'latest.json')) {
    $current = json_decode(file_get_contents($backups_dir . 'latest.json'), true);
    if ($current) {
        $versions[] = [
            'filename' => 'latest.json',
            'version' => $current['version'] ?? 'unknown',
            'build_number' => $current['build_number'] ?? 0,
            'published_at' => $current['published_at'] ?? null,
            'is_prerelease' => $current['is_prerelease'] ?? false,
            'is_current' => true,
            'timestamp' => file_exists($backups_dir . 'latest.json') ? filemtime($backups_dir . 'latest.json') : time(),
            'size' => filesize($backups_dir . 'latest.json')
        ];
    }
}

// Добавляем все бэкапы
foreach ($files as $file) {
    $content = json_decode(file_get_contents($file), true);
    if ($content) {
        $filename = basename($file);
        
        // Извлекаем дату из имени файла (формат: latest.json.backup.2026-01-17_08-30-45)
        preg_match('/backup\.(\d{4}-\d{2}-\d{2}_\d{2}-\d{2}-\d{2})/', $filename, $matches);
        $backup_date = $matches[1] ?? null;
        
        $versions[] = [
            'filename' => $filename,
            'version' => $content['version'] ?? 'unknown',
            'build_number' => $content['build_number'] ?? 0,
            'published_at' => $content['published_at'] ?? null,
            'is_prerelease' => $content['is_prerelease'] ?? false,
            'is_current' => false,
            'timestamp' => filemtime($file),
            'backup_date' => $backup_date,
            'size' => filesize($file),
            'release_notes' => $content['release_notes'] ?? ''
        ];
    }
}

// Сортируем по времени (новые сверху)
usort($versions, function($a, $b) {
    return $b['timestamp'] - $a['timestamp'];
});

echo json_encode([
    'success' => true,
    'count' => count($versions),
    'versions' => $versions
]);