<?php

namespace App\Exceptions;

use Exception;
use Throwable;
use Illuminate\Support\Facades\Log;
use App\Support\AsyncExceptionRecorder;
use Illuminate\Auth\AuthenticationException;
use Illuminate\Session\TokenMismatchException;
use Illuminate\Validation\ValidationException;
use Symfony\Component\HttpFoundation\Response;
use Illuminate\Database\Eloquent\ModelNotFoundException;
use Symfony\Component\HttpKernel\Exception\HttpException;
use Illuminate\Foundation\Exceptions\Handler as ExceptionHandler;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

class Handler extends ExceptionHandler
{
    /**
     * The list of the inputs that are never flashed to the session on validation exceptions.
     *
     * @var array<int, string>
     */
    protected $dontFlash = [
        'current_password',
        'password',
        'password_confirmation',
    ];

    /**
     * 统一的响应格式
     */
    private function formatJsonResponse(int $code, string $message, int $httpCode = 200, array $data = null): \Illuminate\Http\JsonResponse
    {
        return response()->json([
            'code' => $code,
            'message' => $message,
            'data' => $data,
        ], $httpCode);
    }

    /**
     * 统一的日志记录
     */
    private function logException(Throwable $e, string $level = 'error', array $extra = []): void
    {
        $context = [
            'exception' => get_class($e),
            'file' => $e->getFile(),
            'line' => $e->getLine(),
            'trace' => $e->getTraceAsString(),
            'url' => request()->fullUrl(),
            'method' => request()->method(),
            'ip' => request()->ip(),
            'user_agent' => request()->userAgent(),
            'user_id' => auth()->id(),
            ...$extra
        ];

        Log::{$level}($e->getMessage(), $context);
    }

    /**
     * Register the exception handling callbacks for the application.
     */
    public function register(): void
    {
        // 记录所有异常到数据库（异步）
        $this->reportable(function (Throwable $e) {
            // 预处理请求数据，确保可以被 JSON 序列化
            $requestData = [
                'url' => request()->fullUrl(),
                'method' => request()->method(),
                'params' => json_decode(json_encode(request()->all(), JSON_INVALID_UTF8_SUBSTITUTE), true) ?? [],
                'headers' => array_map(function ($item) {
                    return is_array($item) ? implode(', ', $item) : $item;
                }, request()->headers->all()),
            ];

            // 异步分发任务
            AsyncExceptionRecorder::dispatch(
                get_class($e),
                $e->getMessage(),
                $e->getFile(),
                $e->getLine(),
                $e->getTraceAsString(),
                $requestData,  // 使用处理过的数据
                auth()->id()
            );

            // 记录日志
            if ($e instanceof ValidationException) {
                $this->logException($e, 'info');
            } else {
                $this->logException($e);
            }
        });

        // 404异常
        $this->renderable(function (NotFoundHttpException $e) {
            return $this->formatJsonResponse(404, '请求的资源不存在', Response::HTTP_NOT_FOUND);
        });

        // 模型未找到异常
        $this->renderable(function (ModelNotFoundException $e) {
            return $this->formatJsonResponse(404, '请求的数据不存在', Response::HTTP_NOT_FOUND);
        });

        // CSRF Token异常
        $this->renderable(function (TokenMismatchException $e) {
            return $this->formatJsonResponse(419, 'CSRF Token 已过期，请刷新页面重试', 419);
        });

        // 认证异常
        $this->renderable(function (AuthenticationException $e) {
            return $this->formatJsonResponse(401, '请先登录', Response::HTTP_UNAUTHORIZED);
        });

        // 验证异常
        $this->renderable(function (ValidationException $e) {
            return $this->formatJsonResponse(Response::HTTP_UNPROCESSABLE_ENTITY, $e->validator->errors()->first(), 200);
        });

        // HTTP异常
        $this->renderable(function (HttpException $e) {
            return $this->formatJsonResponse($e->getStatusCode(), $e->getMessage(), 200);
        });

        // 业务异常
        $this->renderable(function (ApiException $e) {
            return $this->formatJsonResponse($e->getCode() ?: 400, $e->getMessage());
        });

        // 其他所有异常
        $this->renderable(function (Throwable $e) {
            if (config('app.debug')) {
                throw $e;
            }
            return $this->formatJsonResponse(500, '服务器内部错误', Response::HTTP_INTERNAL_SERVER_ERROR);
        });
    }

    /**
     * 渲染异常，所有异常都返回 统一的JSON 格式
     * @param mixed $request
     * @param \Throwable $exception
     * @return mixed|Response|\Illuminate\Http\JsonResponse
     */
    public function render($request, Throwable $exception)
    {
        if ($request->expectsJson()) {
            if ($exception instanceof Exception) {
                return response()->json([
                    'code' => $exception->getCode() ?: 500,
                    'message' => $exception->getMessage(),
                    'data' => null,
                ], status: Response::HTTP_INTERNAL_SERVER_ERROR);
            }
        }

        return parent::render($request, $exception);
    }
}