<?php

namespace App\Exceptions;

use App\Helpers\ResponseEnum;
use Illuminate\Auth\AuthenticationException;
use Illuminate\Foundation\Exceptions\Handler as ExceptionHandler;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Validation\ValidationException;
use Symfony\Component\HttpFoundation\Response;
use Throwable;

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',
    ];

    /**
     * Register the exception handling callbacks for the application.
     */
    public function register(): void
    {
        $this->reportable(function (Throwable $e) {
            // 记录异常到日志
            if ($this->shouldReport($e)) {
                LogException::safeLog(
                    '应用异常: ' . $e->getMessage(),
                    $e,
                    [
                        'file' => $e->getFile(),
                        'line' => $e->getLine(),
                        'url' => request()->fullUrl(),
                        'method' => request()->method(),
                        'ip' => request()->ip(),
                        'user_agent' => request()->userAgent(),
                    ]
                );
            }
        });
    }

    /**
     * Render an exception into an HTTP response.
     *
     * @param Request $request
     * @param Throwable $e
     * @return Response
     */
    public function render($request, Throwable $e): Response
    {
        // 如果请求期望JSON响应（API请求），返回JSON格式错误
        if ($request->expectsJson() || $request->is('admin/*')) {
            return $this->renderJsonException($request, $e);
        }

        // 非API请求使用默认处理
        return parent::render($request, $e);
    }

    /**
     * 渲染JSON格式的异常响应
     *
     * @param Request $request
     * @param Throwable $e
     * @return JsonResponse
     */
    protected function renderJsonException(Request $request, Throwable $e): JsonResponse
    {
        // 认证异常
        if ($e instanceof AuthenticationException) {
            return $this->jsonResponse('授权失败，请先登录', 401, 401);
        }

        // 参数验证异常
        if ($e instanceof ValidationException) {
            return $this->jsonResponse('参数错误', 422, 422, $e->errors());
        }

        // 业务异常
        if ($e instanceof BusinessException) {
            return $this->jsonResponse($e->getMessage(), $e->getCode());
        }

        // 其他异常统一处理
        return $this->renderSystemException($e);
    }

    /**
     * 渲染系统异常
     *
     * @param Throwable $e
     * @return JsonResponse
     */
    protected function renderSystemException(Throwable $e): JsonResponse
    {
        // 生产环境隐藏详细错误信息
        if (!config('app.debug')) {
            return $this->jsonResponse('服务器错误', 500, 500);
        }

        // 开发环境显示详细错误信息
        $debugInfo = [
            'exception' => get_class($e),
            'file' => $e->getFile(),
            'line' => $e->getLine(),
            'message' => $e->getMessage()
        ];

        return $this->jsonResponse($e->getMessage(), 500, 500, $debugInfo);
    }

    /**
     * 统一的JSON响应格式
     *
     * @param string $message 错误消息
     * @param int $code 错误代码
     * @param int $status HTTP状态码
     * @param mixed $data 额外数据
     * @return JsonResponse
     */
    protected function jsonResponse(string $message, int $code, int $status = 200, mixed $data = null): JsonResponse
    {
        $response = [
            'success' => false,
            'message' => $message,
            'code' => $code,
            'data' => $data,
        ];

        // 如果有验证错误，添加errors字段
        if ($data && is_array($data) && $status === 422) {
            $response['errors'] = $data;
            $response['data'] = null;
        }

        return response()->json($response, $status);
    }

    /**
     * 抛出业务异常 - 统一入口
     * @param string $message 错误消息
     * @param int $code 错误代码 (默认400)
     * @throws BusinessException
     */
    public static function throw(string $message, int $code = 400): void
    {
        throw new BusinessException([$code, $message]);
    }

    /**
     * 抛出错误 - throw方法的别名
     * @param string $message
     * @param int $code
     * @throws BusinessException
     */
    public static function error(string $message, int $code = 400): void
    {
        self::throw($message, $code);
    }

    /**
     * 抛出失败异常
     * @param string $message
     * @throws BusinessException
     */
    public static function fail(string $message = '操作失败'): void
    {
        self::throw($message, 400);
    }
}