/**
 * Unpacked extensions for the Jarvis Chromium window.
 * Playwright starts with --disable-extensions, so these are loaded explicitly.
 */
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';

export const BROWSER_EXTENSIONS = [
  { id: 'ublock-origin-lite', name: 'uBlock Origin Lite' },
  { id: 'dark-reader', name: 'Dark Reader' },
];

export function extensionRoot(env = process.env) {
  const override = String(env.JARVIS_BROWSER_EXTENSIONS || '').trim();
  if (override) return override;
  const state = env.XDG_STATE_HOME || path.join(os.homedir(), '.local/state');
  return path.join(state, 'jarvis', 'browser', 'extensions');
}

export function installedExtensionDirs(root = extensionRoot()) {
  const dirs = [];
  for (const ext of BROWSER_EXTENSIONS) {
    const dir = path.join(root, ext.id);
    try {
      if (fs.existsSync(path.join(dir, 'manifest.json'))) dirs.push(dir);
    } catch {
      // A missing or unreadable extension is skipped so the browser still starts.
    }
  }
  return dirs;
}

export function extensionLaunch(dirs = installedExtensionDirs()) {
  const list = (Array.isArray(dirs) ? dirs : []).filter(Boolean);
  if (!list.length) return { args: [], ignoreDefaultArgs: undefined, extensions: [] };
  const joined = list.join(',');
  return {
    args: [
      `--disable-extensions-except=${joined}`,
      `--load-extension=${joined}`,
    ],
    ignoreDefaultArgs: ['--disable-extensions'],
    extensions: list.map((dir) => path.basename(dir)),
  };
}