<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

class ApiResponseMiddleware
{
    /**
     * Handle an incoming request.
     * @param Request $request
     * @param Closure $next
     * @return JsonResponse|mixed
     */
    public function handle(Request $request, Closure $next): mixed
    {
        $response = $next($request);

        // 只处理非标准格式的 API 响应
        if ($response instanceof JsonResponse) {
            $content = $response->getData(true);

            // 如果已经是标准响应格式，则不处理
            if (isset($content['error']) && isset($content['body']) && isset($content['message'])) {
                return $response;
            }

            // 处理错误响应
            if ($response->getStatusCode() >= 400) {
                $error = 500;
                $message = '';

                // 标准的错误响应
                if (isset($content['message'])) {
                    $message = $content['message'];
                }

                // 根据状态码设置不同的错误码
                if ($response->getStatusCode() === 401) {
                    $error = 401;
                    $message = $message ?: __('middleware.api.login');
                } elseif ($response->getStatusCode() === 403) {
                    $error = 403;
                    $message = $message ?: __('middleware.api.permission');
                } elseif ($response->getStatusCode() === 404) {
                    $error = 404;
                    $message = $message ?: __('middleware.api.resource');
                } elseif ($response->getStatusCode() === 422) {
                    $error = 422;
                    $message = $message ?: __('middleware.api.data');
                } else {
                    $message = $message ?: __('middleware.api.system');
                }

                // 重新包装响应
                $newContent = [
                    'error' => $error,
                    'body' => (object)[],
                    'message' => $message,
                ];

                // 如果是验证错误，添加错误详情
                if ($response->getStatusCode() === 422 && isset($content['errors'])) {
                    $newContent['body'] = ['validation_errors' => $content['errors']];
                }

                $response->setData($newContent);
                $response->setStatusCode(200);
            }
            // 处理成功响应
            else {
                // 重新包装响应
                $response->setData([
                    'error' => 0,
                    'body' => $content,
                    'message' => '',
                ]);
            }
        }

        return $response;
    }
}