import { resolve } from 'node:path';

import { fileURLToPath } from 'url';

export const root = fileURLToPath(new URL('..', import.meta.url));
export const NODE_MAJOR_VERSION = 18;

// hard-coded for now:
// fixme(xp): report error if app is not running on DEV_SERVER_URL
const DEV_SERVER_URL = process.env.DEV_SERVER_URL;

/** @type 'production' | 'development'' */
const mode = (process.env.NODE_ENV = process.env.NODE_ENV || 'development');

// List of env that will be replaced by esbuild
const ENV_MACROS = ['AFFINE_GOOGLE_CLIENT_ID', 'AFFINE_GOOGLE_CLIENT_SECRET'];

/** @return {{main: import('esbuild').BuildOptions, preload: import('esbuild').BuildOptions}} */
export const config = () => {
  const define = Object.fromEntries([
    ...ENV_MACROS.map(key => [
      'process.env.' + key,
      JSON.stringify(process.env[key] ?? ''),
    ]),
    ['process.env.NODE_ENV', `"${mode}"`],
  ]);

  if (DEV_SERVER_URL) {
    define['process.env.DEV_SERVER_URL'] = `"${DEV_SERVER_URL}"`;
  }

  return {
    main: {
      entryPoints: [
        resolve(root, './layers/main/src/index.ts'),
        resolve(root, './layers/main/src/exposed.ts'),
      ],
      outdir: resolve(root, './dist/layers/main'),
      bundle: true,
      target: `node${NODE_MAJOR_VERSION}`,
      platform: 'node',
      external: [
        'electron',
        'yjs',
        'better-sqlite3',
        'electron-updater',
        '@affine/native-*',
      ],
      define: define,
      format: 'cjs',
      loader: {
        '.node': 'copy',
      },
      assetNames: '[name]',
    },
    preload: {
      entryPoints: [resolve(root, './layers/preload/src/index.ts')],
      outdir: resolve(root, './dist/layers/preload'),
      bundle: true,
      target: `node${NODE_MAJOR_VERSION}`,
      platform: 'node',
      external: ['electron', '../main/exposed-meta'],
      define: define,
    },
  };
};