import { NextResponse } from 'next/server';
import type { NextRequest } from 'next/server';

export function middleware(request: NextRequest) {
  // 获取请求的路径
  const path = request.nextUrl.pathname;
  console.log(`[Middleware] 请求路径: ${path}`);
  
  // 定义不需要验证的路径
  const publicPaths = ['/login', '/register', '/auth/callback'];
  
  // API 路由不需要验证
  if (path.startsWith('/api/')) {
    console.log('[Middleware] API路由，跳过验证');
    return NextResponse.next();
  }

  // 静态资源不需要验证
  if (path.includes('/_next/') || path.includes('/static/') || path.match(/\.(ico|png|jpg|jpeg|svg|css|js)$/)) {
    console.log('[Middleware] 静态资源，跳过验证');
    return NextResponse.next();
  }
  
  // 检查是否是公开路径
  const isPublicPath = publicPaths.some(publicPath => path === publicPath || path.startsWith(publicPath));
  console.log(`[Middleware] 是公开路径: ${isPublicPath}`);

  // 获取所有 cookie
  const allCookies = Object.fromEntries(request.cookies.getAll().map(c => [c.name, c.value]));
  console.log('[Middleware] 所有Cookie:', JSON.stringify(allCookies));

  // 检查各个认证cookie
  const accessToken = request.cookies.get('sb-access-token');
  const refreshToken = request.cookies.get('sb-refresh-token');
  const providerToken = request.cookies.get('sb-provider-token');
  const authToken = request.cookies.get('supabase-auth-token');
  const customAuthToken = request.cookies.get('sb-auth-token');
  
  console.log('[Middleware] 认证Cookie详情:', {
    'sb-access-token': accessToken ? '存在' : '不存在',
    'sb-refresh-token': refreshToken ? '存在' : '不存在',
    'sb-provider-token': providerToken ? '存在' : '不存在',
    'supabase-auth-token': authToken ? '存在' : '不存在',
    'sb-auth-token': customAuthToken ? '存在' : '不存在'
  });

  // 检查用户是否登录
  const isLoggedIn = !!(accessToken || refreshToken || providerToken || authToken || customAuthToken);
  console.log(`[Middleware] 用户是否登录: ${isLoggedIn}`);

  // 如果是公开路径但已登录，重定向到首页
  if (isPublicPath && isLoggedIn) {
    console.log('[Middleware] 已登录用户访问公开路径，重定向到首页');
    return NextResponse.redirect(new URL('/', request.url));
  }

  // 如果不是公开路径且未登录，重定向到登录页
  if (!isPublicPath && !isLoggedIn) {
    console.log('[Middleware] 未登录用户访问私有路径，重定向到登录页');
    const redirectUrl = new URL('/login', request.url);
    redirectUrl.searchParams.set('redirect', encodeURIComponent(request.url));
    return NextResponse.redirect(redirectUrl);
  }

  console.log('[Middleware] 通过验证，允许访问');
  return NextResponse.next();
}

// 配置中间件匹配的路径
export const config = {
  matcher: [
    // 匹配所有路径，但排除静态资源
    '/((?!_next/static|_next/image|favicon.ico).*)',
    // 明确包括重要的路由
    '/', 
    '/analytics', 
    '/links',
    '/create-shorturl',
  ],
};