goog.module('grrUi.acl.requestApprovalDialogDirective');

const apiService = goog.requireType('grrUi.core.apiService');
const {stringToList} = goog.require('grrUi.core.utils');



/**
 * Controller for RequestApprovalDialogDirective.
 * @unrestricted
 */
const RequestApprovalDialogController = class {
  /**
   * @param {!angular.Scope} $scope
   * @param {!angular.$q} $q
   * @param {!apiService.ApiService} grrApiService
   * @ngInject
   */
  constructor($scope, $q, grrApiService) {
    /** @private {!angular.Scope} */
    this.scope_ = $scope;

    /** @private {!angular.$q} */
    this.q_ = $q;

    /** @private {!apiService.ApiService} */
    this.grrApiService_ = grrApiService;

    /** @export {?string} */
    this.subjectTitle;

    /** @export {Array<string>} */
    this.ccAddresses = [];

    /** @export {Array<string>} */
    this.recentReasons;

    /** @export {string} */
    this.selectedRecentReason;

    /** @export {string} */
    this.approversList;

    /** @export {string} */
    this.reason = $scope.reason || '';

    /** @export {boolean} */
    this.useCcAddresses = true;

    this.scope_.$watch('approvalType', this.onApprovalTypeChange_.bind(this));
    this.scope_.$watch(
        'controller.selectedRecentReason',
        this.onSelectedRecentReasonChange_.bind(this));

    this.grrApiService_.getCached('/config/Email.approval_optional_cc_address')
        .then(this.onCcAddressResponse_.bind(this));
    this.grrApiService_.get('/users/me/approvals/client', {count: 7})
        .then(this.onLatestApprovalsResponse_.bind(this));
  }

  /**
   * Handles changes in approvalType binding.
   *
   * @param {string} newValue
   * @private
   */
  onApprovalTypeChange_(newValue) {
    if (angular.isString(newValue)) {
      this.subjectTitle =
          (newValue.charAt(0).toUpperCase() +
           newValue.slice(1).replace('-', ' '));
    }
  }

  /**
   * Handles changes in selectedRecentReason input binding.
   *
   * @param {string} newValue
   * @private
   */
  onSelectedRecentReasonChange_(newValue) {
    if (angular.isString(newValue) && newValue) {
      this.reason = newValue;
    }
  }

  /**
   * Handles API response that returns a list of CC addresses to be
   * used when sending the approval.
   *
   * @param {Object} response
   * @private
   */
  onCcAddressResponse_(response) {
    this.ccAddresses =
        stringToList(response['data']['value']['value']['value']['value']);
  }

  /**
   * Handles API response that returns a list of recent client approvals
   * that this user had requested.
   *
   * @param {Object} response
   * @private
   */
  onLatestApprovalsResponse_(response) {
    this.recentReasons = [];
    const items = response['data']['items'];
    for (let i = 0; i < items.length; ++i) {
      const reason = items[i]['value']['reason']['value'];
      if (this.recentReasons.indexOf(reason) === -1) {
        this.recentReasons.push(reason);
      }
    }
  }

  /**
   * Sends an approval creation request to the server.
   *
   * @return {!angular.$q.Promise} A promise indicating success or failure.
   * @export
   */
  proceed() {
    const deferred = this.q_.defer();

    const url = this.scope_['createRequestUrl'];
    const args = angular.copy(this.scope_['createRequestArgs']);
    args['approval']['reason'] = this.reason;
    args['approval']['notified_users'] = stringToList(this.approversList);
    if (this.useCcAddresses && this.ccAddresses) {
      args['approval']['email_cc_addresses'] = this.ccAddresses;
    }

    this.grrApiService_.post(url, args).then(
        function success() {
          deferred.resolve('Approval request was sent.');
        },
        function failure(response) {
          deferred.reject(response['data']['message']);
        });

    return deferred.promise;
  }
};



/**
 * Directive that displays "request approval" dialog.
 *
 * @return {!angular.Directive} Directive definition object.
 */
exports.RequestApprovalDialogDirective = function() {
  return {
    scope: {
      approvalType: '=',
      createRequestUrl: '=',
      createRequestArgs: '=',
      accessErrorDescription: '=',
      reason: '=',
    },
    restrict: 'E',
    templateUrl: '/static/angular-components/acl/' +
        'request-approval-dialog.html',
    controller: RequestApprovalDialogController,
    controllerAs: 'controller'
  };
};


/**
 * Name of the directive in Angular.
 *
 * @const
 * @export
 */
exports.RequestApprovalDialogDirective.directive_name =
    'grrRequestApprovalDialog';
