import { resolve } from 'node:path';
import { fileURLToPath } from 'node:url';

import type { BuildOptions } from 'esbuild';

export const electronDir = fileURLToPath(new URL('..', import.meta.url));

export const rootDir = resolve(electronDir, '..', '..');

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;

export const mode = (process.env.NODE_ENV =
  process.env.NODE_ENV || 'development');

export const config = (): BuildOptions => {
  const define = Object.fromEntries([
    ['process.env.NODE_ENV', `"${mode}"`],
    ['process.env.USE_WORKER', '"true"'],
  ]);

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

  return {
    entryPoints: [
      resolve(electronDir, './src/main/index.ts'),
      resolve(electronDir, './src/preload/index.ts'),
      resolve(electronDir, './src/helper/index.ts'),
    ],
    entryNames: '[dir]',
    outdir: resolve(electronDir, './dist'),
    bundle: true,
    target: `node${NODE_MAJOR_VERSION}`,
    platform: 'node',
    external: [
      'electron',
      'electron-updater',
      '@toeverything/plugin-infra',
      'yjs',
      'semver',
      'tinykeys',
    ],
    define: define,
    format: 'cjs',
    loader: {
      '.node': 'copy',
    },
    assetNames: '[name]',
    treeShaking: true,
    sourcemap: 'linked',
  };
};