BFF

// Next.js API Route를 BFF로 활용
// pages/api/dashboard.ts (또는 app/api/dashboard/route.ts)

import type { NextApiRequest, NextApiResponse } from 'next';

// 여러 마이크로서비스에서 데이터 집계
async function fetchUserProfile(userId: string) {
  const res = await fetch(`${process.env.USER_SERVICE}/users/${userId}`);
  return res.json();
}

async function fetchOrders(userId: string) {
  const res = await fetch(`${process.env.ORDER_SERVICE}/users/${userId}/orders?limit=5`);
  return res.json();
}

async function fetchNotifications(userId: string) {
  const res = await fetch(`${process.env.NOTIFICATION_SERVICE}/users/${userId}`);
  return res.json();
}

export default async function handler(req: NextApiRequest, res: NextApiResponse) {
  const userId = req.headers['x-user-id'] as string;

  // 병렬로 여러 서비스 호출
  const [profile, orders, notifications] = await Promise.all([
    fetchUserProfile(userId),
    fetchOrders(userId),
    fetchNotifications(userId),
  ]);

  // 클라이언트에 필요한 형태로 변환
  res.json({
    user: {
      name: profile.name,
      avatar: profile.avatarUrl,
    },
    recentOrders: orders.map(o => ({
      id: o.id,
      total: o.totalAmount,
      status: o.status,
    })),
    unreadCount: notifications.filter(n => !n.read).length,
  });
}