import { alias, equal } from '@ember/object/computed';
import Service, { inject as service } from '@ember/service';
import { task } from 'ember-concurrency';

const ROOT_NAMESPACE = '';
export default Service.extend({
  store: service(),
  auth: service(),
  userRootNamespace: alias('auth.authData.userRootNamespace'),
  //populated by the query param on the cluster route
  path: null,
  // list of namespaces available to the current user under the
  // current namespace
  accessibleNamespaces: null,

  inRootNamespace: equal('path', ROOT_NAMESPACE),

  setNamespace(path) {
    this.set('path', path);
  },

  findNamespacesForUser: task(function*() {
    // uses the adapter and the raw response here since
    // models get wiped when switching namespaces and we
    // want to keep track of these separately
    let store = this.get('store');
    let adapter = store.adapterFor('namespace');
    let userRoot = this.get('auth.authData.userRootNamespace');
    try {
      let ns = yield adapter.findAll(store, 'namespace', null, {
        adapterOptions: {
          forUser: true,
          namespace: userRoot,
        },
      });
      let keys = ns.data.keys || [];
      this.set(
        'accessibleNamespaces',
        keys.map(n => {
          let fullNS = n;
          // if the user's root isn't '', then we need to construct
          // the paths so they connect to the user root to the list
          // otherwise using the current ns to grab the correct leaf
          // node in the graph doesn't work
          if (userRoot) {
            fullNS = `${userRoot}/${n}`;
          }
          return fullNS.replace(/\/$/, '');
        })
      );
    } catch (e) {
      //do nothing here
    }
  }).drop(),

  reset() {
    this.set('accessibleNamespaces', null);
  },
});