<?php
define('CYBERCHAT_API', true);
require_once __DIR__ . '/../bootstrap.php';
sendCorsHeaders();

$user = authRequired();
$action = $_POST['action'] ?? $_GET['action'] ?? 'list';
$search = trim((string)($_GET['search'] ?? $_POST['search'] ?? ''));
$rows = personalArchiveRows($user, $search, min(1000, max(1, (int)($_GET['limit'] ?? 500))));

if ($action === 'export') {
    if (!featureValue($user, 'text_export', false)) jsonResponse(['error' => 'Your plan does not include exports'], 403);
    $canVoiceExport = (bool)featureValue($user, 'voice_export', false);
    $format = strtolower((string)($_GET['format'] ?? 'json'));
    $export = array_map(function(array $row) use ($canVoiceExport): array {
        $item = [
            'id' => (int)$row['id'],
            'username' => $row['username'], 'message' => $row['message'],
            'type' => $row['message_type'], 'created_at' => date(DATE_ATOM, (int)$row['created_at']),
        ];
        if ($row['message_type'] === 'voice' && $canVoiceExport && !empty($row['voice_file'])) {
            $item['voice_url'] = appBaseUrl() . '/' . voicePublicPath($row['voice_file']);
        }
        return $item;
    }, $rows);
    $filename = 'cyberchat-archive-' . date('Y-m-d');
    if ($format === 'csv') {
        header('Content-Type: text/csv; charset=utf-8');
        header('Content-Disposition: attachment; filename="' . $filename . '.csv"');
        $out = fopen('php://output', 'w');
        fputcsv($out, ['id', 'username', 'message', 'type', 'created_at', 'voice_url']);
        foreach ($export as $row) fputcsv($out, [
            $row['id'], $row['username'], $row['message'], $row['type'],
            $row['created_at'], $row['voice_url'] ?? '',
        ]);
        fclose($out);
        exit;
    }
    header('Content-Type: application/json; charset=utf-8');
    header('Content-Disposition: attachment; filename="' . $filename . '.json"');
    echo json_encode(['exported_at' => date(DATE_ATOM), 'messages' => $export], JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
    exit;
}

$payload = array_map(function(array $row): array {
    return [
        'id' => (int)$row['id'],
        'message' => $row['message'], 'message_type' => $row['message_type'],
        'voice_url' => $row['message_type'] === 'voice' && !empty($row['voice_file']) ? voicePublicPath($row['voice_file']) : null,
        'voice_mime' => $row['voice_mime'] ?? null,
        'voice_duration' => $row['voice_duration'] !== null ? (float)$row['voice_duration'] : null,
        'created_at' => (int)$row['created_at'], 'day_key' => $row['day_key'],
    ];
}, $rows);
jsonResponse([
    'messages' => $payload,
    'retention_days' => max(30, (int)featureValue($user, 'text_archive_days', 30)),
    'can_export' => (bool)featureValue($user, 'text_export', false),
    'voice_included' => (bool)featureValue($user, 'voice_archive', false),
]);