import type { NextConfig } from "next";

// 后端地址：开发环境兜底 localhost:3001，生产部署必须显式配置 BACKEND_URL
const API_TARGET =
  process.env.BACKEND_URL || process.env.NEXT_PUBLIC_API_URL || "http://localhost:3001";

const nextConfig: NextConfig = {
  images: {
    minimumCacheTTL: 14400, // 4 小时
    remotePatterns: [
      { protocol: "http", hostname: "localhost" },
    ],
  },
  async rewrites() {
    return [
      {
        source: "/api/:path*",
        destination: `${API_TARGET}/api/:path*`,
      },
      // 用户上传文件（头像等，全部 WebP）
      {
        source: "/uploads/:path*",
        destination: `${API_TARGET}/uploads/:path*`,
      },
    ];
  },
};

export default nextConfig;