import { createRouteHandlerClient } from '@supabase/auth-helpers-nextjs';
import { cookies } from 'next/headers';
import { NextResponse } from 'next/server';
import type { NextRequest } from 'next/server';

export async function GET(request: NextRequest) {
  const requestUrl = new URL(request.url);
  const code = requestUrl.searchParams.get('code');
  
  console.log('Auth callback received:', { url: request.url, hasCode: !!code });
  
  // 如果没有code参数，则重定向到登录页面
  if (!code) {
    console.log('没有找到code参数，重定向到登录页面');
    return NextResponse.redirect(new URL('/login', request.url));
  }

  try {
    // 创建supabase客户端
    const cookieStore = cookies();
    const supabaseRouteHandler = createRouteHandlerClient({ cookies: () => cookieStore });
    
    // 交换code获取会话
    console.log('开始交换code获取会话');
    const { data, error } = await supabaseRouteHandler.auth.exchangeCodeForSession(code);
    
    if (error) {
      console.error('交换会话时出错:', error);
      throw error;
    }
    
    console.log('成功获取会话，用户:', data.session?.user.email);
    
    // 检查会话是否成功创建
    if (data.session) {
      console.log('会话创建成功:', {
        userId: data.session.user.id,
        email: data.session.user.email,
        expiresAt: data.session.expires_at ? new Date(data.session.expires_at * 1000).toISOString() : 'unknown'
      });
      
      // 设置额外的cookie以确保客户端能检测到登录状态
      // 使用Next.js的Response来设置cookie
      const response = NextResponse.redirect(new URL('/', request.url));
      response.cookies.set({
        name: 'sb-auth-token',
        value: 'true',
        path: '/',
        maxAge: 60 * 60 * 24 * 7, // 7 days
        sameSite: 'lax',
        secure: process.env.NODE_ENV === 'production',
        httpOnly: false,
      });
      console.log('设置了备用cookie: sb-auth-token');
      return response;
    }
    
    // 优先使用应用程序根路径重定向
    console.log('重定向到首页');
    return NextResponse.redirect(new URL('/', request.url));
  } catch (error) {
    console.error('Auth callback error:', error);
    // 出错时重定向到登录页面
    return NextResponse.redirect(
      new URL('/login?message=Authentication failed. Please try again.', request.url)
    );
  }
}