const debug = require('debug')('cenv:api');
const axios = require('axios');

/**
 * @class Api
 */
class Api {
  /**
   * @param {Config} config
   */
  constructor(config) {
    const hasRegistry = !!config.registry;
    const hasToken = !!config.token;
    const hasAuth = (config.username && config.password);

    if (!hasRegistry) throw new Error('Registry ulr must be specified');
    if (!hasToken && !hasAuth) throw new Error('Neither token or user auth was specified');

    const axiosConfig = {
      baseURL: `${config.registry}/v1/`,
      timeout: config.timeout || 1000,
    };
    if (config.token) {
      axiosConfig.headers = { Authorization: `Bearer ${config.token}` };
    }

    this.config = config;
    this.instance = axios.create(axiosConfig);
  }

  /**
   * @return {Boolean}
   */
  get authNeeded() {
    return !this.config.token;
  }

  /**
   * @return {Promise.<TResult>}
   */
  authenticate() {
    if (!this.authNeeded) return Promise.resolve();

    const { username, password } = this.config;
    return this.instance.post('auth', { username, password })
      .then(data => (this.config.token = data.token))
      .catch(() => console.log('passou aqui 1'));
  }

  /**
   * @param {String} name
   * @return {Promise.<TResult>}
   */
  environment(name) {
    debug(`retrieving variables for "${name}" environment`);

    return this.authenticate()
      .then(this.instance.get(`environment/${name}`))
      .catch(() => {});
  }
}

new Api({ registry: 'asdasdasd', username: 'asdasd', password: 'asdasd' })
  .environment('asda')
  .catch(() => console.log('passou aqui 2'));

module.exports = Api;