import { fileURLToPath } from 'node:url';
import path from 'node:path';
import { defineConfig } from 'vite';
import react from '@vitejs/plugin-react';

const rootDir = path.dirname(fileURLToPath(import.meta.url));
const engineDir = path.resolve(rootDir, '../engine');

export default defineConfig({
  plugins: [react()],
  resolve: {
    // Follow the node_modules symlink to the real sibling directory, so Vite's dev server
    // watches and transforms the actual engine source files (not a frozen pre-bundled copy).
    preserveSymlinks: false,
  },
  optimizeDeps: {
    // Treat @incgame/engine as first-party source, not a vendor dependency to pre-bundle once
    // and cache — otherwise edits to the engine package wouldn't trigger HMR until a full
    // dev-server restart.
    exclude: ['@incgame/engine'],
  },
  server: {
    fs: {
      // The engine package lives outside this project's root (a sibling directory reached
      // through a node_modules symlink); allow Vite to serve/watch files from there too.
      allow: [rootDir, engineDir],
    },
  },
});