<?php

require_once __DIR__ . '/../vendor/autoload.php';

use App\Config\AppConfig;
use App\Controllers\AuthController;
use App\Controllers\SessionController;
use App\Controllers\MessageController;
use App\Controllers\ChatController;
use App\Controllers\UploadController;
use App\Controllers\ConfigController;
use App\Controllers\InstallController;
use App\Middleware\AuthMiddleware;
use App\Middleware\AdminMiddleware;

// 设置响应头
header('Content-Type: application/json; charset=utf-8');

// CORS 设置
$corsOrigin = AppConfig::get('corsOrigin', '*');
header("Access-Control-Allow-Origin: {$corsOrigin}");
header('Access-Control-Allow-Methods: GET, POST, PUT, DELETE, OPTIONS');
header('Access-Control-Allow-Headers: Content-Type, Authorization');

// 处理 OPTIONS 预检请求
if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') {
    http_response_code(200);
    exit;
}

// 路由表定义
$routes = [
    // 认证路由（无需认证）
    ['POST', 'auth/login', [AuthController::class, 'login'], false, false],

    // 认证路由（需认证）
    ['GET', 'auth/me', [AuthController::class, 'me'], true, false],

    // 会话路由
    ['GET', 'sessions', [SessionController::class, 'index'], true, false],
    ['POST', 'sessions', [SessionController::class, 'create'], true, false],
    ['PUT', 'sessions/{id}', [SessionController::class, 'update'], true, false],
    ['DELETE', 'sessions/{id}', [SessionController::class, 'delete'], true, false],

    // 消息路由
    ['GET', 'sessions/{id}/messages', [MessageController::class, 'index'], true, false],
    ['POST', 'sessions/{id}/messages', [MessageController::class, 'create'], true, false],

    // 聊天路由
    ['POST', 'chat/completions', [ChatController::class, 'completions'], true, false],

    // 上传路由
    ['POST', 'upload', [UploadController::class, 'upload'], true, false],

    // 配置路由
    ['GET', 'config', [ConfigController::class, 'getConfig'], true, false],
    ['PUT', 'config', [ConfigController::class, 'updateConfig'], true, true],

    // 人格路由
    ['GET', 'personalities', [ConfigController::class, 'listPersonalities'], true, false],
    ['POST', 'personalities', [ConfigController::class, 'createPersonality'], true, true],
    ['PUT', 'personalities/{id}', [ConfigController::class, 'updatePersonality'], true, true],
    ['DELETE', 'personalities/{id}', [ConfigController::class, 'deletePersonality'], true, true],

    // 安装路由（无需认证）
    ['GET', 'install/status', [InstallController::class, 'status'], false, false],
    ['POST', 'install/test-db', [InstallController::class, 'testDb'], false, false],
    ['POST', 'install/setup', [InstallController::class, 'setup'], false, false],
];

// 解析请求路径
$requestUri = $_SERVER['REQUEST_URI'];
$path = parse_url($requestUri, PHP_URL_PATH);
$basePath = '/api/';

// 去除 /api/ 前缀
if (str_starts_with($path, $basePath)) {
    $path = substr($path, strlen($basePath));
}
$path = rtrim($path, '/');

$method = $_SERVER['REQUEST_METHOD'];

// 路由匹配
$matched = false;

try {
    foreach ($routes as $route) {
        [$routeMethod, $routePattern, $handler, $needAuth, $needAdmin] = $route;

        if ($method !== $routeMethod) {
            continue;
        }

        // 将路由模式转换为正则表达式
        $paramNames = [];
        $regexPattern = preg_replace_callback('/\{(\w+)\}/', function ($m) use (&$paramNames) {
            $paramNames[] = $m[1];
            return '([^/]+)';
        }, $routePattern);

        $regex = '#^' . $regexPattern . '$#';

        if (preg_match($regex, $path, $matches)) {
            $matched = true;

            // 提取路径参数
            $params = [];
            for ($i = 0; $i < count($paramNames); $i++) {
                $params[$paramNames[$i]] = $matches[$i + 1];
            }

            // 认证检查
            if ($needAuth) {
                AuthMiddleware::handle();
            }

            // 管理员检查
            if ($needAdmin) {
                AdminMiddleware::handle();
            }

            // 调用控制器方法
            $controllerMethod = $handler[1];
            $handler[0]::$controllerMethod(...array_values($params));

            break;
        }
    }

    if (!$matched) {
        http_response_code(404);
        echo json_encode(['success' => false, 'message' => '接口不存在']);
    }
} catch (\Throwable $e) {
    http_response_code(500);
    echo json_encode(['success' => false, 'message' => '服务器内部错误']);
}