<?php
header('Content-Type: application/json');
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: GET, OPTIONS');
header('Access-Control-Allow-Headers: Content-Type');

if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') {
    http_response_code(204);
    exit;
}

if ($_SERVER['REQUEST_METHOD'] !== 'GET') {
    http_response_code(405);
    echo json_encode(['error' => 'Method not allowed']);
    exit;
}

$username = trim($_GET['username'] ?? '');

// Validate username
if (!preg_match('/^[a-z0-9]{3,32}$/', $username)) {
    http_response_code(400);
    echo json_encode(['error' => 'Invalid username']);
    exit;
}

// Check user exists
$db = new PDO('sqlite:/data/db/platform.sqlite');
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$stmt = $db->prepare('SELECT id FROM users WHERE username = ?');
$stmt->execute([$username]);
if (!$stmt->fetch()) {
    http_response_code(404);
    echo json_encode(['error' => 'User not found']);
    exit;
}

$htdocs = "/data/sites/{$username}/htdocs";
$files  = [];

if (is_dir($htdocs)) {
    $items = scandir($htdocs);
    foreach ($items as $item) {
        if ($item === '.' || $item === '..') continue;
        $full = "{$htdocs}/{$item}";
        if (is_file($full)) {
            $files[] = [
                'name'       => $item,
                'size'       => filesize($full),
                'updated_at' => date('Y-m-d H:i:s', filemtime($full))
            ];
        }
    }
}

echo json_encode([
    'success'  => true,
    'username' => $username,
    'files'    => $files
]);