/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */


var App = require('app');

App.AddHostController = App.WizardController.extend({

  name: 'addHostController',

  totalSteps: 7,

  /**
   * Used for hiding back button in wizard
   */
  hideBackButton: true,

  /**
   * All wizards data will be stored in this variable
   *
   * cluster - cluster name
   * hosts - hosts, ssh key, repo info, etc.
   * services - services list
   * hostsInfo - list of selected hosts
   * slaveComponentHosts, hostSlaveComponents - info about slave hosts
   * masterComponentHosts - info about master hosts
   * config??? - to be described later
   */
  content: Em.Object.create({
    cluster: null,
    hosts: null,
    installOptions: null,
    services: null,
    slaveComponentHosts: null,
    masterComponentHosts: null,
    serviceConfigProperties: null,
    advancedServiceConfig: null,
    controllerName: 'addHostController'
  }),

  components:require('data/service_components'),

  /**
   * return new object extended from clusterStatusTemplate
   * @return Object
   */
  getCluster: function(){
    return jQuery.extend({}, this.get('clusterStatusTemplate'), {name: App.router.getClusterName()});
  },

  /**
   * return new object extended from installOptionsTemplate
   * @return Object
   */
  getInstallOptions: function(){
    return jQuery.extend({}, this.get('installOptionsTemplate'));
  },

  /**
   * return empty hosts array
   * @return Array
   */
  getHosts: function(){
    return [];
  },

   /**
   * Remove host from model. Used at <code>Confirm hosts(step2)</code> step
   * @param hosts Array of hosts, which we want to delete
   */
  removeHosts: function (hosts) {
    //todo Replace this code with real logic
    App.db.removeHosts(hosts);
  },

  /**
   * Load services data from server.
   */
  loadServicesFromServer: function() {
    var displayOrderConfig = require('data/services');
    var apiUrl = App.get('stackVersionURL');
    var apiService = this.loadServiceComponents(displayOrderConfig, apiUrl);
    //
    apiService.forEach(function(item, index){
      apiService[index].isSelected = App.Service.find().someProperty('id', item.serviceName);
      apiService[index].isDisabled = apiService[index].isSelected;
      apiService[index].isInstalled = apiService[index].isSelected;
    });
    this.set('content.services', apiService);
    App.db.setService(apiService);
  },

  /**
   * Load services data. Will be used at <code>Select services(step4)</code> step
   */
  loadServices: function () {
    var servicesInfo = App.db.getService();
    servicesInfo.forEach(function (item, index) {
      servicesInfo[index] = Em.Object.create(item);
    });
    this.set('content.services', servicesInfo);
    console.log('AddHostController.loadServices: loaded data ', servicesInfo);
    var serviceNames = servicesInfo.filterProperty('isSelected', true).mapProperty('serviceName');
    console.log('selected services ', serviceNames);
    this.set('content.skipMasterStep', !serviceNames.contains('HBASE') && !serviceNames.contains('ZOOKEEPER'));
  },

  /**
   * Load master component hosts data for using in required step controllers
   */
  loadMasterComponentHosts: function () {
    var masterComponentHosts = App.db.getMasterComponentHosts();
    if (!masterComponentHosts) {
      masterComponentHosts = [];
      App.HostComponent.find().filterProperty('isMaster', true).forEach(function (item) {
        masterComponentHosts.push({
          component: item.get('componentName'),
          hostName: item.get('host.hostName'),
          isInstalled: true,
          serviceId: item.get('service.id'),
          display_name: item.get('displayName')
        })
      });
      App.db.setMasterComponentHosts(masterComponentHosts);
    }
    this.set("content.masterComponentHosts", masterComponentHosts);
    console.log("AddHostController.loadMasterComponentHosts: loaded hosts ", masterComponentHosts);
  },

  /**
   * Save HBase and ZooKeeper to main controller
   * @param stepController
   */
  saveHbZk: function(stepController) {
    var self = this;
    var hosts = stepController.get('hosts');
    var headers = stepController.get('headers');
    var masterComponentHosts = App.db.getMasterComponentHosts();

    headers.forEach(function(header) {
      var rm = masterComponentHosts.filterProperty('component', header.get('name'));
      if(rm) {
        masterComponentHosts.removeObjects(rm);
      }
    });

    headers.forEach(function(header) {
      var component = self.get('components').findProperty('component_name', header.get('name'));
      hosts.forEach(function(host) {
        if (host.get('checkboxes').findProperty('title', component.display_name).checked) {
          masterComponentHosts .push({
            display_name: component.display_name,
            component: component.component_name,
            hostName: host.get('hostName'),
            serviceId: component.service_name,
            isInstalled: false
          });
        }
      });
    });

    console.log("installerController.saveMasterComponentHosts: saved hosts ", masterComponentHosts);
    App.db.setMasterComponentHosts(masterComponentHosts);
    this.set('content.masterComponentHosts', masterComponentHosts);
  },

  /**
   * return slaveComponents bound to hosts
   * @return {Array}
   */
  getSlaveComponentHosts: function () {
    var components = [
      {
        name: 'DATANODE',
        service: 'HDFS'
      },
      {
        name: 'TASKTRACKER',
        service: 'MAPREDUCE'
      },
      {
        name: 'HBASE_REGIONSERVER',
        service: 'HBASE'
      }
    ];

    var result = [];
    var services = App.Service.find();
    var selectedServices = this.get('content.services').filterProperty('isSelected', true).mapProperty('serviceName');
    for (var index = 0; index < components.length; index++) {
      var comp = components[index];
      if (!selectedServices.contains(comp.service)) {
        continue;
      }


      var service = services.findProperty('id', comp.service);
      var hosts = [];

      service.get('hostComponents').filterProperty('componentName', comp.name).forEach(function (host_component) {
        hosts.push({
          group: "Default",
          hostName: host_component.get('host.id'),
          isInstalled: true
        });
      }, this);

      result.push({
        componentName: comp.name,
        displayName: App.format.role(comp.name),
        hosts: hosts,
        isInstalled: true
      })
    }

    var clientsHosts = App.HostComponent.find().filterProperty('componentName', 'HDFS_CLIENT');
    var hosts = [];

    clientsHosts.forEach(function (host_component) {
      hosts.push({
        group: "Default",
        hostName: host_component.get('host.id'),
        isInstalled: true
      });
    }, this);

    result.push({
      componentName: 'CLIENT',
      displayName: 'client',
      hosts: hosts,
      isInstalled: true
    })

    return result;
  },

  /**
   * Load master component hosts data for using in required step controllers
   */
  loadSlaveComponentHosts: function () {
    var slaveComponentHosts = App.db.getSlaveComponentHosts();
    if (!slaveComponentHosts) {
      slaveComponentHosts = this.getSlaveComponentHosts();
    }
    this.set("content.slaveComponentHosts", slaveComponentHosts);
    console.log("AddHostController.loadSlaveComponentHosts: loaded hosts ", slaveComponentHosts);
  },

  /**
   * Load information about hosts with clients components
   */
  loadClients: function () {
    var clients = App.db.getClientsForSelectedServices();
    this.set('content.clients', clients);
    console.log("AddHostController.loadClients: loaded list ", clients);
  },

  /**
   * Generate clients list for selected services and save it to model
   * @param stepController step4WizardController
   */
  saveClients: function () {
    var clients = [];
    var serviceComponents = require('data/service_components');
    var hostComponents = App.HostComponent.find();

    this.get('content.services').filterProperty('isSelected', true).forEach(function (_service) {
      var client = serviceComponents.filterProperty('service_name', _service.serviceName).findProperty('isClient', true);
      if (client) {
        clients.pushObject({
          component_name: client.component_name,
          display_name: client.display_name,
          isInstalled: hostComponents.filterProperty('componentName', client.component_name).length > 0
        });
      }
    }, this);

    App.db.setClientsForSelectedServices(clients);
    this.set('content.clients', clients);
    console.log("AddHostController.saveClients: saved list ", clients);
  },

  /**
   * Load data for all steps until <code>current step</code>
   */
  loadAllPriorSteps: function () {
    var step = this.get('currentStep');
    switch (step) {
      case '9':
      case '8':
      case '7':
      case '6':
      case '5':
        this.loadServiceConfigProperties();
      case '4':
      case '3':
        this.loadClients();
        this.loadServices();
        this.loadMasterComponentHosts();
        this.loadSlaveComponentHosts();
        this.load('hosts');
      case '2':
        this.loadServices();
      case '1':
        this.load('hosts');
        this.load('installOptions');
        this.load('cluster');
    }
  },

  /**
   * Remove all loaded data.
   * Created as copy for App.router.clearAllSteps
   */
  clearAllSteps: function () {
    this.clearInstallOptions();
    // clear temporary information stored during the install
    this.set('content.cluster', this.getCluster());
  },

  /**
   * Clear all temporary data
   */
  finish: function () {
    this.setCurrentStep('1');
    this.clearAllSteps();
    this.clearStorageData();
    App.router.get('updateController').updateAll();
  }

});