/**
 * (c) Copyright 2016 Hewlett-Packard Development Company, L.P.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License. You may obtain
 * a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

(function() {
  'use strict';

  angular
    .module('horizon.app.core.images')
    .factory('horizon.app.core.images.actions.edit.service', editService);

  editService.$inject = [
    '$q',
    'horizon.app.core.images.events',
    'horizon.app.core.images.resourceType',
    'horizon.app.core.images.actions.editWorkflow',
    'horizon.app.core.metadata.service',
    'horizon.app.core.openstack-service-api.glance',
    'horizon.app.core.openstack-service-api.policy',
    'horizon.framework.util.actions.action-result.service',
    'horizon.framework.util.q.extensions',
    'horizon.framework.widgets.modal.wizard-modal.service',
    'horizon.framework.widgets.toast.service'
  ];

  /**
   * @ngDoc factory
   * @name horizon.app.core.images.actions.editService
   * @Description A service to open the user wizard.
   */
  function editService(
    $q,
    events,
    imageResourceType,
    editWorkflow,
    metadataService,
    glance,
    policy,
    actionResultService,
    $qExtensions,
    wizardModalService,
    toast
  ) {
    var message = {
      success: gettext('Image %s was successfully updated.')
    };

    var service = {
      allowed: allowed,
      perform: perform
    };

    return service;

    //////////////

    function allowed(image) {
      return $q.all([
        policy.ifAllowed({rules: [['image', 'modify_image']]}),
        isActive(image)
      ]);
    }

    function perform(image) {
      var deferred = glance.getImage(image.id);
      deferred.then(onLoad);
      var data = {};
      data.imagePromise = deferred;

      function onLoad(response) {
        var localImage = response.data;
        data.image = localImage;
      }

      return wizardModalService.modal({
        data: data,
        workflow: editWorkflow,
        submit: submit
      }).result;
    }

    function submit(stepModels) {
      var image = stepModels.imageForm;
      var metadata = stepModels.updateMetadataForm;
      return updateMetadata().then(updateImage, onUpdateImageFail);

      function updateMetadata() {

        return metadataService
          .getMetadata('image', image.id)
          .then(onMetadataGet);

        function onMetadataGet(response) {
          var updated = metadata;
          var removed = angular.copy(response.data);
          angular.forEach(updated, function(value, key) {
            delete removed[key];
          });

          return metadataService
            .editMetadata('image', image.id, updated, Object.keys(removed));
        }
      }

      function updateImage() {
        return glance.updateImage(image).then(onUpdateImageSuccess, onUpdateImageFail);
      }

      function onUpdateImageSuccess() {
        toast.add('success', interpolate(message.success, [image.name]));
        return actionResultService.getActionResult()
          .updated(imageResourceType, image.id)
          .result;
      }

      function onUpdateImageFail() {
        return actionResultService.getActionResult()
          .failed(imageResourceType, image.id)
          .result;
      }
    }

    function isActive(image) {
      return $qExtensions.booleanAsPromise(image.status === 'active');
    }

  } // end of editService
})(); // end of IIFE
