import { HttpInterceptorFn, HttpErrorResponse } from '@angular/common/http';
import { inject } from '@angular/core';
import { Router } from '@angular/router';
import { catchError, throwError } from 'rxjs';
import { ConfigService } from 'base-core';
import { AuthService } from '../services/auth.service';

export const MockInterceptor: HttpInterceptorFn = (req, next) => {
  const config = inject(ConfigService);
  const router = inject(Router);
  const authService = inject(AuthService);
  
  console.log(`拦截请求: ${req.method} ${req.url}`);
  console.log(`完整URL: ${req.urlWithParams}`);
  
  // 如果启用模拟数据且请求是API调用，可以在此拦截
  // 目前仅记录请求
  if (config.useMockData) {
    console.log(`Mock enabled for: ${req.url}`);
  }
  
  // 克隆请求以添加认证头
  let authReq = req;
  
  // 检查是否为公开端点（不需要认证）
  const isPublicEndpoint = req.url.includes('/login') || req.url.includes('/register');
  
  // 为需要认证的API请求添加Basic认证头（暂时禁用）
  if (req.url.includes('/api/') && !isPublicEndpoint) {
    console.log('API请求，添加默认认证头');
    const defaultBasicAuth = 'YWRtaW46MTIz'; // base64("admin:123")
    authReq = req.clone({
      setHeaders: {
        Authorization: `Basic ${defaultBasicAuth}`
      }
    });
  } else {
    console.log('公开端点或非API请求，不添加认证头');
  }
  
  return next(authReq).pipe(
    catchError((error: HttpErrorResponse) => {
      console.log(`请求错误: ${error.status} ${req.method} ${req.url}`);
      console.log('错误详情:', error.error);
      
      // 处理认证错误
      if (error.status === 401 || error.status === 403 || 
          (error.error && (error.error.error?.includes('认证') || error.error.error?.includes('缺少认证')))) {
        console.warn('认证失败，跳转到登录页面:', error.error);
        console.log('当前路由:', router.url);
        
        // 清除本地存储的认证信息
        authService.logout();
        
        // 跳转到登录页面，除非当前已经在登录页面
        if (!router.url.includes('/login')) {
          console.log('重定向到登录页面');
          router.navigate(['/login'], {
            queryParams: { returnUrl: router.url }
          });
        } else {
          console.log('已经在登录页面，不重定向');
        }
      }
      
      return throwError(() => error);
    })
  );
};