import react from "@vitejs/plugin-react";
import { loadEnv } from "vite";
import { defineConfig } from "vitest/config";

/**
 * 开发时可将 VITE_EVAL_API_BASE 留空，前端请求 /internal/... 由 Vite 代理转发。
 * 默认与 api/development.sh 中 INTERNAL_EVAL_PORT（默认 7999）一致。
 * 覆盖：VITE_EVAL_PROXY_TARGET=http://127.0.0.1:8001 npm run dev
 */
export default defineConfig(({ mode }) => {
  const env = loadEnv(mode, process.cwd(), "");
  const proxyTarget =
    (env.VITE_EVAL_PROXY_TARGET || "").trim() ||
    "http://127.0.0.1:7999";

  return {
    plugins: [react()],
    server: {
      port: 5174,
      proxy: {
        "/internal": {
          target: proxyTarget,
          changeOrigin: true,
          /** 后端未启动时默认 Vite 控制台几乎无输出；这里打出直连目标便于对照 API 终端。 */
          configure: (proxy) => {
            proxy.on("error", (err) => {
              console.error(
                `[vite proxy] /internal → ${proxyTarget} failed:`,
                (err as Error).message,
                "(请在该地址启动 Internal Eval API，默认 api 目录下 :7999)",
              );
            });
          },
        },
      },
    },
    test: {
      environment: "node",
      include: ["src/**/*.test.ts"],
    },
  };
});