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');
  
  // 如果没有code参数，则重定向到登录页面
  if (!code) {
    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
    await supabaseRouteHandler.auth.exchangeCodeForSession(code);
    
    // 直接重定向到首页，避免中间跳转
    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)
    );
  }
}