import type { NextConfig } from "next";

/** 本地调试代理目标，见 config/*.env / .env.local 的 API_PROXY_TARGET */
const apiProxyTarget = (process.env.API_PROXY_TARGET || "").replace(/\/$/, "");
const appEnv = process.env.APP_ENV;

const nextConfig: NextConfig = {
  output: "standalone",
  // 仅在显式 APP_ENV=test|development 时分目录；未设置 / production 仍用 .next
  distDir:
    appEnv === "test" ? ".next-test" : appEnv === "development" ? ".next-dev" : ".next",
  poweredByHeader: false,
  cacheComponents: true,
  partialPrefetching: true,
  // 用 127.0.0.1 打开本地 dev 时允许 HMR（默认只放行 localhost）
  allowedDevOrigins: ["127.0.0.1"],
  async rewrites() {
    if (!apiProxyTarget) return [];
    return [
      {
        source: "/api/:path*",
        destination: `${apiProxyTarget}/api/:path*`,
      },
      // /h5/m3u8、/enkey、/newenkey 由 route handler 代理，密钥地址不带尾斜杠
    ];
  },
};

export default nextConfig;