export default class ResourceConsumption {

  //@ngInject
  constructor($q, $resource, vpcDomainConsumptionAuth, TokenStore) {
    this.$resource = $resource;
    this.vpcDomainConsumptionAuth = vpcDomainConsumptionAuth;
    this.TokenStore = TokenStore;

    this.defer = $q.defer();
    this.promise = this.defer.promise;
    this.resource = null;
    this.activeToken = null;

    this._createResource();
  }

  query(params, data) {
    let $promise = this.promise
      .then(() => this._setActiveToken(params.uuid))
      .then(() => this.resource.query(params, data).$promise)
      .catch(e => {
        if(e.status !== 401) return;
        return this._setActiveToken(params.uuid, true)
          .then(() => this.resource.query(params, data).$promise);
      });

    return {$promise};
  }

  getResourceInfo(params) {
    let $promise = this.promise
      .then(() => this._setActiveToken(params.uuid))
      .then(() => this.resource.getResourceInfo(params).$promise)
      .catch(e => {
        if(e.status !== 401) return;
        return this._setActiveToken(params.uuid, true)
          .then(() => this.resource.getResourceInfo(params).$promise)
      })
    ;

    return {$promise};
  }

  _createResource() {
    return this.vpcDomainConsumptionAuth.getInfo().then(({url}) => {
      const URL = url + '/v1/resource/sel_project/:uuid/metric/:type/measures';
      const PARAMS = {
        uuid: '@uuid',
        type: '@type'
      };
      const ACTIONS = {
        query: {
          method: 'GET',
          isArray: true,
          headers: {
            'X-Auth-Token': this._getActiveToken.bind(this)
          }
        },
        getResourceInfo: {
          method: 'GET',
          url: url + '/v1/resource/sel_project/:uuid',
          headers: {
            'X-Auth-Token': this._getActiveToken.bind(this)
          }
        }
      };

      this.resource = this.$resource(URL, PARAMS, ACTIONS);

      this.defer.resolve(this.$resource);

      return this.promise;
    });
  }

  _getActiveToken() {
    if (!this.activeToken) {
      throw new Error('Active token doesn\'t set');
    }
    return this.activeToken;
  }

  _setActiveToken(projectId, renew = false) {
    return this.TokenStore
      .requestResellToken({projectId}, renew, false)
      .then(token => this.activeToken = token);
  }

}