<?php
/**
 * 本地调试用路由脚本（生产环境不使用，由 Nginx/Apache 处理）。
 *
 * 启动：php -S 127.0.0.1:8001 router.php
 *
 * 注意：内置服务器的 docroot 是项目根目录而非 public/，因此不能用
 * `return false` 交还给内置服务器（那样会在项目根下找文件导致 404）。
 * 这里直接读取 public/ 下的静态文件并附上正确的 MIME 类型。
 */

$uri = urldecode(parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH) ?? '/');
$publicDir = __DIR__ . '/public';

// 防目录穿越
$realPublic = realpath($publicDir);
$staticPath = realpath($publicDir . $uri);

if (
    $uri !== '/'
    && $staticPath !== false
    && is_file($staticPath)
    && str_starts_with($staticPath, $realPublic)
    && ! str_ends_with($staticPath, '.php')
) {
    $mimeMap = [
        'css' => 'text/css',
        'js' => 'application/javascript',
        'mjs' => 'application/javascript',
        'json' => 'application/json',
        'png' => 'image/png',
        'jpg' => 'image/jpeg',
        'jpeg' => 'image/jpeg',
        'gif' => 'image/gif',
        'svg' => 'image/svg+xml',
        'ico' => 'image/x-icon',
        'webp' => 'image/webp',
        'woff' => 'font/woff',
        'woff2' => 'font/woff2',
        'ttf' => 'font/ttf',
        'map' => 'application/json',
        'txt' => 'text/plain',
        'xml' => 'application/xml',
        'pdf' => 'application/pdf',
    ];

    $ext = strtolower(pathinfo($staticPath, PATHINFO_EXTENSION));
    header('Content-Type: ' . ($mimeMap[$ext] ?? 'application/octet-stream'));
    header('Content-Length: ' . filesize($staticPath));
    header('Cache-Control: public, max-age=3600');
    readfile($staticPath);

    return true;
}

require $publicDir . '/index.php';