import fs from 'fs';
import path from 'path';
import { Command } from 'commander';
import { extractAlbum } from '../services';
import { WrongFileExtException } from '../exceptions';

export const AlbumExtractor = new Command();

AlbumExtractor.name('extract')
  .description('Extract google photos data')
  .argument('<url>', 'album shared url')
  .argument('<filename>', 'output json filename')
  .action(async (url: string, filename: string) => {
    const dir = path.dirname(filename);
    const extname = path.extname(filename);

    if (extname !== '.json') {
      throw new WrongFileExtException('file extension should be .json')
    }

    if (!fs.existsSync(dir)) {
      fs.mkdirSync(dir);
    }

    const album = await extractAlbum(url);

    const jsonString = JSON.stringify(album);
    fs.writeFileSync(filename, jsonString);
    console.log(`album exported in ${filename}`);
  });