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

export default defineConfig(({mode}) => {
  const env = loadEnv(mode, '.', '');
  const apiProxyTarget = env.VITE_API_PROXY_TARGET || 'http://localhost:3100';
  return {
    plugins: [react(), tailwindcss()],
    resolve: {
      alias: {
        '@': path.resolve(__dirname, '.'),
      },
    },
    server: {
      // HMR is disabled in AI Studio via DISABLE_HMR env var.
      // Do not modify—file watching is disabled to prevent flickering during agent edits.
      hmr: process.env.DISABLE_HMR !== 'true',
      proxy: {
        '/api': {
          target: apiProxyTarget,
          changeOrigin: true,
          ws: true,
        },
      },
    },
    test: {
      environment: 'jsdom',
      include: ['src/**/*.{test,spec}.{ts,tsx}', 'server/**/*.{test,spec}.ts'],
      exclude: ['e2e/**', 'node_modules/**', 'dist/**'],
      globals: true,
      setupFiles: './src/test/setup.ts',
    },
  };
});