import fs from 'fs';
import path from 'path';
import { promisify } from 'util';

const writeFileAsync = promisify(fs.writeFile);
const readFileAsync = promisify(fs.readFile);

/**
 * File utilities
 *
 * @module @doodle/i18n/onesky/dist/utils
 */

/**
 * Write a JSON object to a file
 *
 * @param {String} file
 * @param {object} messages
 * @returns {Promise}
 * @async
 */
export const writeJsonFile = async (file, messages) => {
  const content = JSON.stringify(messages);
  try {
    path
      .dirname(file)
      .split('/')
      .reduce((currentPath, directory) => {
        if (!fs.existsSync(currentPath)) {
          fs.mkdirSync(currentPath);
        }
        return `${currentPath}/${directory}`;
      });
  } catch (e) {
    // ignore
  }

  return writeFileAsync(file, content);
};

/**
 * Read a JSON file and parse the contents
 *
 * @param {string} file
 * @returns {Promise<object>}
 * @async
 */
export const readJsonFile = async file => {
  const content = await readFileAsync(file);
  return JSON.parse(content);
};

/**
 * Read OneSky resource configuration file, `.oneskyrc`
 *
 * @param {string} file
 * @returns {Promise<object>}
 * @async
 */
export const getResourceConfiguration = async (file = `${process.cwd()}/.oneskyrc`) => readJsonFile(file);