/* -*- Mode: javascript; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

(function() {
  /* jshint validthis: true */
  'use strict';

  /*
   * sgSubscribe - Common subscription widget
   * @restrict attribute
   * @param {string} sgSubscribe - the folder type
   * @param {function} sgSubscribeOnSelect - the function to call when subscribing to a folder.
   *        One variable is available: folderData.
   * @ngInject
   * @example:

     <md-button sg-subscribe="contact" sg-subscribe-on-select="subscribeToFolder">Subscribe ..</md-button>
  */
  sgSubscribe.$inject = ['User'];
  function sgSubscribe(User) {
    return {
      restrict: 'A',
      scope: {
        folderType: '@sgSubscribe',
        onFolderSelect: '&sgSubscribeOnSelect'
      },
      replace: false,
      bindToController: true,
      controller: sgSubscribeDialogController,
      controllerAs: '$sgSubscribeDialogController',
      link: link
    };
  }

  function link(scope, element, attrs, controller) {
    var inputEl = element.find('input');
    element.on('click', controller.showDialog);
  }

  /**
   * @ngInject
   */
  sgSubscribeDialogController.$inject = ['$mdDialog'];
  function sgSubscribeDialogController($mdDialog) {
    var vm = this;
    vm.showDialog = function() {
      $mdDialog.show({
        templateUrl: '../Contacts/UIxContactsUserFolders',
        clickOutsideToClose: true,
        locals: {
          folderType: vm.folderType,
          onFolderSelect: vm.onFolderSelect
        },
        controller: sgSubscribeController,
        controllerAs: 'subscribe'
      });
    };
  }

  /**
   * @ngInject
   */
  sgSubscribeController.$inject = ['$mdDialog', 'folderType', 'onFolderSelect', 'User'];
  function sgSubscribeController($mdDialog, folderType, onFolderSelect, User) {
    var vm = this;

    vm.selectedUser = null;
    vm.users = [];
    vm.folderType = folderType;

    vm.searchTextOptions = {
      updateOn: 'default blur',
      debounce: {
        default: 300,
        blur: 0
      }
    };

    vm.onChange = function(input) {
      User.$filter(vm.searchText, null, { results: vm.users }).then(function(users) {
        input.$setValidity('matches', users.length > 0);
        input.$setTouched();
        if (vm.selectedUser) {
          // If selected user is no longer part of the matching users, unselect it
          if (_.isUndefined(_.find(users, function(user) {
            return user.uid == vm.selectedUser.uid;
          }))) {
            vm.selectedUser = null;
          }
        }
      });
    };

    vm.selectUser = function(i) {
      if (vm.selectedUser == vm.users[i]) {
        vm.selectedUser = null;
      }
      else {
        // Fetch folders of specific type for selected user
        vm.users[i].$folders(folderType).then(function() {
          vm.selectedUser = vm.users[i];
        });
      }
    };

    // Callback upon subscription to a folder
    vm.selectFolder = function(folder) {
      onFolderSelect({folderData: folder});
    };

    vm.close = function() {
      User.$query = null;
      $mdDialog.hide();
    };
  }

  angular
    .module('SOGo.Common')
    .directive('sgSubscribe', sgSubscribe);
})();