import {createEntry} from '../../valueObjects/Entry';
import AuthenticationPage from './AuthenticationPage';
import API from './API';

export default class GitHub {
  constructor(config) {
    this.config = config;
    if (config.getIn(['backend', 'repo']) == null) {
      throw 'The GitHub backend needs a "repo" in the backend configuration.';
    }
    this.repo = config.getIn(['backend', 'repo']);
    this.branch = config.getIn(['backend', 'branch']) || 'master';
  }

  authComponent() {
    return AuthenticationPage;
  }

  setUser(user) {
    this.api = new API(user.token, this.repo, this.branch || 'master');
  }

  authenticate(state) {
    this.api = new API(state.token, this.repo, this.branch || 'master');
    return this.api.user().then((user) => {
      user.token = state.token;
      return user;
    });
  }

  entries(collection) {
    return this.api.listFiles(collection.get('folder')).then((files) => (
      Promise.all(files.map((file) => (
        this.api.readFile(file.path, file.sha).then((data) => {
          return createEntry(file.path, file.path.split('/').pop().replace(/\.[^\.]+$/, ''), data);
        })
      )))
    )).then((entries) => ({
      pagination: {},
      entries
    }));
  }

  entry(collection, slug) {
    return this.entries(collection).then((response) => (
      response.entries.filter((entry) => entry.slug === slug)[0]
    ));
  }

  persistEntry(entry, mediaFiles = [], options = {}) {
    return this.api.persistFiles(entry, mediaFiles, options);
  }
}