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

export default defineConfig(({ mode }) => {
  const env = loadEnv(mode, fileURLToPath(new URL(".", import.meta.url)), "VITE_");
  return {
    plugins: [react()],
    server: {
      port: 3000,
      // Optional same-origin development bridge for browser acceptance against a real remote API.
      // Production builds never use it and no target is inferred when the variable is absent.
      proxy: env.VITE_API_PROXY_TARGET ? {
        "/api": { target: env.VITE_API_PROXY_TARGET, changeOrigin: false },
      } : undefined,
    },
    test: {
      environment: "jsdom",
      setupFiles: "./src/test/setup.ts",
      // One reusable worker keeps the release gate deterministic on operator
      // hosts that also run several long-lived local control-plane processes.
      pool: "threads",
      maxWorkers: 1,
      isolate: false,
    },
  };
});