// Copyright (c) 2026 Gordon Bolton. MIT License.
import { defineConfig, loadEnv } from 'vite'
import path from 'path'

export default defineConfig(({ mode }) => {
  // Load env variables from root directory to match backend TLS configuration
  const env = loadEnv(mode, path.resolve(__dirname, '..'), '');

  const port = env.PORT || 3001;
  const tlsEnabled = (env.TLS_ENABLED || 'true').toLowerCase() !== 'false';
  const target = `${tlsEnabled ? 'https' : 'http'}://localhost:${port}`;

  return {
    build: {
      // NOTE (Issue #66): `outDir` is intentionally the repo-root `../public`,
      // NOT the Vite default `client/dist/`. The Express server in
      // `server/app.js` serves static assets directly from `public/`, so the
      // Vite build emits its bundle alongside the hand-authored static assets
      // (favicon, etc.) that live in `public/` and are committed to the repo.
      // Do NOT change this back to `dist/` without also updating the Express
      // static-serve configuration and the Dockerfile copy steps.
      outDir: '../public',
      // NOTE (Issue #66): `emptyOutDir: false` is REQUIRED because `public/`
      // contains hand-authored static assets that must survive the build.
      // Setting this to `true` would wipe those assets on every `vite build`.
      emptyOutDir: false,
      rollupOptions: {
        input: {
          main: './src/main.js'
        },
        output: {
          entryFileNames: 'app.js',
          chunkFileNames: '[name].js',
          assetFileNames: '[name][extname]'
        }
      }
    },
    server: {
      port: 5173,
      host: true, // Listen on all network interfaces
      proxy: {
        '/api': {
          target: target,
          changeOrigin: true,
          secure: false // Allow self-signed certificate in development
        }
      }
    }
  };
});