/**
 * 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.openstack-service-api')
    .factory('horizon.app.core.openstack-service-api.zun', ZunAPI);

  ZunAPI.$inject = [
    'horizon.framework.util.http.service',
    'horizon.framework.widgets.toast.service',
    'horizon.framework.util.i18n.gettext'
  ];

  function ZunAPI(apiService, toastService, gettext) {
    var service = {
      createContainer: createContainer,
      getContainer: getContainer,
      getContainers: getContainers,
      deleteContainer: deleteContainer,
      deleteContainers: deleteContainers,
      startContainer: startContainer,
      stopContainer: stopContainer,
      logsContainer: logsContainer,
      rebootContainer: rebootContainer,
      pauseContainer: pauseContainer,
      unpauseContainer: unpauseContainer,
      executeContainer: executeContainer,
      killContainer: killContainer
    };

    return service;

    ///////////////
    // Containers //
    ///////////////

    function createContainer(params) {
      return apiService.post('/api/zun/containers/', params)
        .error(function() {
          toastService.add('error', gettext('Unable to create Container'));
        });
    }

    function getContainer(id) {
      return apiService.get('/api/zun/containers/' + id)
        .success(function(data, status, headers, config) {
          convertMemorySize(data);
          return data;
        })
        .error(function() {
          toastService.add('error', gettext('Unable to retrieve the Container.'));
        });
    }

    function getContainers() {
      return apiService.get('/api/zun/containers/')
        .success(function(data, status, headers, config) {
          angular.forEach(data.items, function(container, idx){
            convertMemorySize(container);
          });
          return data;
        })
        .error(function() {
          toastService.add('error', gettext('Unable to retrieve the Containers.'));
        });
    }

    function deleteContainer(id, suppressError) {
      var promise = apiService.delete('/api/zun/containers/', [id]);
      return suppressError ? promise : promise.error(function() {
        var msg = gettext('Unable to delete the Container with id: %(id)s');
        toastService.add('error', interpolate(msg, { id: id }, true));
      });
    }

    // FIXME(shu-mutou): Unused for batch-delete in Horizon framework in Feb, 2016.
    function deleteContainers(ids) {
      return apiService.delete('/api/zun/containers/', ids)
        .error(function() {
          toastService.add('error', gettext('Unable to delete the Containers.'));
        });
    }

    function startContainer(id) {
      return apiService.post('/api/zun/containers/' + id + '/start')
        .error(function() {
          toastService.add('error', gettext('Unable to start Container'));
        });
    }

    function stopContainer(id) {
        return apiService.post('/api/zun/containers/' + id + '/stop')
          .error(function() {
            toastService.add('error', gettext('Unable to stop Container'));
          });
      }

    function logsContainer(id) {
        return apiService.get('/api/zun/containers/' + id + '/logs')
          .error(function() {
            toastService.add('error', gettext('Unable to get logs of Container'));
          });
      }

    function convertMemorySize(container){
      var memoryUnits = { "b": gettext("bytes"),
                          "k": gettext("KB"),
                          "m": gettext("MB"),
                          "g": gettext("GB") };

      container.memorysize = "";
      container.memoryunit = "";
      if(container.memory !== null && container.memory !== ""){
        // separate number and unit.
        var regex = /(\d+)([bkmg]?)/;
        var match = regex.exec(container.memory);
        container.memorysize = match[1];
        if(match[2]){
          container.memoryunit = memoryUnits[match[2]];
        }
      }
    }

    function rebootContainer(id) {
      return apiService.post('/api/zun/containers/' + id + '/reboot')
        .error(function() {
          toastService.add('error', gettext('Unable to reboot Container'));
        });
    }

    function pauseContainer(id) {
      return apiService.post('/api/zun/containers/' + id + '/pause')
        .error(function() {
          toastService.add('error', gettext('Unable to pause Container'));
        });
    }

    function unpauseContainer(id) {
      return apiService.post('/api/zun/containers/' + id + '/unpause')
        .error(function() {
          toastService.add('error', gettext('Unable to unpause of Container'));
        });
    }

    function executeContainer(id, params) {
      return apiService.post('/api/zun/containers/' + id + '/execute', params)
        .error(function() {
          toastService.add('error', gettext('Unable to execute the command'));
        });
    }

    function killContainer(id, params) {
      return apiService.post('/api/zun/containers/' + id + '/kill', params)
        .error(function() {
          toastService.add('error', gettext('Unable to send kill signal'));
        });
    }
  }
}());