/**
 * Path Utilities
 * Cross-platform path resolution helpers
 */
import { createRequire } from 'node:module';
import { join } from 'path';
import { homedir } from 'os';
import { existsSync, mkdirSync } from 'fs';

const require = createRequire(import.meta.url);

type ElectronAppLike = Pick<typeof import('electron').app, 'isPackaged' | 'getPath' | 'getAppPath'>;

export {
  quoteForCmd,
  needsWinShell,
  prepareWinSpawn,
  normalizeNodeRequirePathForNodeOptions,
  appendNodeRequireToNodeOptions,
} from './win-shell';

function getElectronApp() {
  if (process.versions?.electron) {
    return (require('electron') as typeof import('electron')).app;
  }

  const fallbackUserData = process.env.NIANCODE_USER_DATA_DIR?.trim() || join(homedir(), '.niancode');
  const fallbackAppPath = process.cwd();
  const fallbackApp: ElectronAppLike = {
    isPackaged: false,
    getPath: (name) => {
      if (name === 'userData') return fallbackUserData;
      return fallbackUserData;
    },
    getAppPath: () => fallbackAppPath,
  };
  return fallbackApp;
}

/**
 * Expand ~ to home directory
 */
export function expandPath(path: string): string {
  if (path.startsWith('~')) {
    return path.replace('~', homedir());
  }
  return path;
}

/**
 * Get Makelore config directory
 */
export function getMakeloreConfigDir(): string {
  return join(homedir(), '.niancode');
}

/**
 * Get Makelore logs directory
 */
export function getLogsDir(): string {
  return join(getElectronApp().getPath('userData'), 'logs');
}

/**
 * Get Makelore data directory
 */
export function getDataDir(): string {
  return getElectronApp().getPath('userData');
}

/**
 * Ensure directory exists
 */
export function ensureDir(dir: string): void {
  if (!existsSync(dir)) {
    mkdirSync(dir, { recursive: true });
  }
}

/**
 * Get resources directory (for bundled assets)
 */
export function getResourcesDir(): string {
  if (getElectronApp().isPackaged) {
    return join(process.resourcesPath, 'resources');
  }
  return join(__dirname, '../../resources');
}

/**
 * Get preload script path
 */
export function getPreloadPath(): string {
  return join(__dirname, '../preload/index.js');
}