/**
 * 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');
var validator = require('utils/validator');

App.WizardStep2Controller = Em.Controller.extend({
  name: 'wizardStep2Controller',
  hostNameArr: [],
  isPattern: false,
  bootRequestId:  null,
  hasSubmitted: false,
  inputtedAgainHostNames: [],

  isInstaller: function () {
    return this.get('content.controllerName') == 'installerController';
  }.property('content.controllerName'),

  hostNames: function () {
    return this.get('content.installOptions.hostNames');
  }.property('content.installOptions.hostNames'),

  manualInstall: function () {
    return this.get('content.installOptions.manualInstall');
  }.property('content.installOptions.manualInstall'),

  sshKey: function () {
    return this.get('content.installOptions.sshKey');
  }.property('content.installOptions.sshKey'),

  sshUser: function () {
    return this.get('content.installOptions.sshUser');
  }.property('content.installOptions.sshUser'),

  installType: function () {
    return this.get('manualInstall') ? 'manualDriven' : 'ambariDriven';
  }.property('manualInstall'),

  isHostNameValid: function (hostname) {
    return validator.isHostname(hostname);
  },
  /**
   * set not installed hosts to the hostNameArr
   */
  updateHostNameArr: function(){
    this.hostNameArr = this.get('hostNames').trim().split(new RegExp("\\s+", "g"));
    this.patternExpression();
    this.get('inputtedAgainHostNames').clear();
    var installedHostNames = App.Host.find().mapProperty('hostName');
    var tempArr = [];
    for (var i = 0; i < this.hostNameArr.length; i++) {
      if (!installedHostNames.contains(this.hostNameArr[i])) {
        tempArr.push(this.hostNameArr[i]);
      } else {
        this.get('inputtedAgainHostNames').push(this.hostNameArr[i]);
      }
    }
    this.set('hostNameArr', tempArr);
  },

  invalidHostNames: [],

  /**
   * validate host names
   * @return {Boolean}
   */
  isAllHostNamesValid: function () {
    var result = true;
    this.updateHostNameArr();
    this.get('invalidHostNames').clear();
    this.hostNameArr.forEach(function(hostName){
      if (!this.isHostNameValid(hostName)) {
        this.get('invalidHostNames').push(hostName);
        result = false;
      }
    }, this);

    return result;
  },

  hostsError: null,
  /**
   * set hostsError if host names don't pass validation
   */
  checkHostError: function () {
    if (this.get('hostNames').trim() === '') {
      this.set('hostsError', Em.I18n.t('installer.step2.hostName.error.required'));
    }
    else {
      this.set('hostsError', null);
    }
  },

  checkHostAfterSubmitHandler: function() {
    if (this.get('hasSubmitted')) {
      this.checkHostError();
    }
  }.observes('hasSubmitted', 'hostNames'),

  sshKeyError: function () {
    if (this.get('hasSubmitted') && this.get('manualInstall') === false && this.get('sshKey').trim() === '') {
      return Em.I18n.t('installer.step2.sshKey.error.required');
    }
    return null;
  }.property('sshKey', 'manualInstall', 'hasSubmitted'),

  sshUserError: function(){
    if (this.get('manualInstall') === false && this.get('sshUser').trim() === '') {
      return Em.I18n.t('installer.step2.sshUser.required');
    }
    return null;
  }.property('sshUser', 'hasSubmitted', 'manualInstall'),

  /**
   * Get host info, which will be saved in parent controller
   */
  getHostInfo: function () {

    var hostNameArr = this.get('hostNameArr');
    var hostInfo = {};
    for (var i = 0; i < hostNameArr.length; i++) {
      hostInfo[hostNameArr[i]] = {
        name: hostNameArr[i],
        installType: this.get('installType'),
        bootStatus: 'PENDING'
      };
    }

    return hostInfo;
  },

  /**
   * Used to set sshKey from FileUploader
   * @param sshKey
   */
  setSshKey: function(sshKey){
    this.set("content.installOptions.sshKey", sshKey);
  },

  /**
   * Onclick handler for <code>next button</code>. Do all UI work except data saving.
   * This work is doing by router.
   * @return {Boolean}
   */
  evaluateStep: function () {
    console.log('TRACE: Entering controller:WizardStep2:evaluateStep function');

    if (this.get('isSubmitDisabled')) {
      return false;
    }

    this.set('hasSubmitted', true);

    this.checkHostError();
    if (this.get('hostsError') || this.get('sshUserError') || this.get('sshKeyError')) {
      return false;
    }

    this.updateHostNameArr();

    if (!this.hostNameArr.length) {
      this.set('hostsError', Em.I18n.t('installer.step2.hostName.error.already_installed'));
      return false;
    }

    if(this.isPattern)
    {
      this.hostNamePatternPopup(this.hostNameArr);
      return false;
    }
    if (this.get('inputtedAgainHostNames').length) {
      this.installedHostsPopup();
    } else {
      this.proceedNext();
    }
  },
  /**
   * check is there a pattern expression in host name textarea
   * push hosts that match pattern in hostNamesArr
   */
  patternExpression: function(){
    this.isPattern = false;
    var self = this;
    var hostNames = [];
    $.each(this.hostNameArr, function(e,a){
      var start, end, extra = {0:""};
      if(/\[\d*\-\d*\]/.test(a)){
        start=a.match(/\[\d*/);
        end=a.match(/\-\d*]/);

        start=start[0].substr(1);
        end=end[0].substr(1);

        if(parseInt(start) <= parseInt(end, 10) && parseInt(start, 10) >= 0){
          self.isPattern = true;

          if(start[0] == "0" && start.length > 1) {
            extra = start.match(/0*/);
          }

          for (var i = parseInt(start, 10); i < parseInt(end, 10) + 1; i++) {
            hostNames.push(a.replace(/\[\d*\-\d*\]/,extra[0].substring(0,start.length-i.toString().length)+i))
          }

        }else{
          hostNames.push(a);
        }
      }else{
        hostNames.push(a);
      }
    });
    this.hostNameArr =  hostNames;
  },
  /**
   * launch hosts to bootstrap
   * and save already registered hosts
   * @return {Boolean}
   */
  proceedNext: function(warningConfirmed){
    if (this.isAllHostNamesValid() !== true && !warningConfirmed) {
      this.warningPopup();
      return false;
    }

    if (this.get('manualInstall') === true) {
      this.manualInstallPopup();
      return false;
    }

    var bootStrapData = JSON.stringify({'verbose': true, 'sshKey': this.get('sshKey'), 'hosts': this.get('hostNameArr'), 'user': this.get('sshUser')});

    if (App.skipBootstrap) {
      this.saveHosts();
      return true;
    }

    var requestId = App.router.get(this.get('content.controllerName')).launchBootstrap(bootStrapData);
    if (requestId == '0') {
      var controller = App.router.get(App.clusterStatus.wizardControllerName);
      controller.registerErrPopup(Em.I18n.t('common.information'), Em.I18n.t('installer.step2.evaluateStep.hostRegInProgress'));
    } else if (requestId) {
      this.set('content.installOptions.bootRequestId', requestId);
      this.saveHosts();
    }
  },

  /**
   * show warning for host names without dots or IP addresses
   */
  warningPopup: function () {
    var self = this;
    App.ModalPopup.show({
      header: Em.I18n.t('common.warning'),
      onPrimary: function () {
        this.hide();
        self.proceedNext(true);
      },
      bodyClass: Ember.View.extend({
        template: Ember.Handlebars.compile(Em.I18n.t('installer.step2.warning.popup.body').format(self.get('invalidHostNames').join(', ')))
      })
    });
  },

  /**
   * show popup with the list of hosts that are already part of the cluster
   */
  installedHostsPopup: function () {
    var self = this;
    App.ModalPopup.show({
      header: Em.I18n.t('common.warning'),
      onPrimary: function () {
        self.proceedNext();
        this.hide();
      },
      bodyClass: Ember.View.extend({
        template: Ember.Handlebars.compile('<p>{{t installer.step2.evaluateStep.installedHosts}}</p><p>' + self.get('inputtedAgainHostNames').join(', ') + '</p><p>{{t installer.step2.evaluateStep.continueConfirm}}</p>')
      })
    });
  },

  /**
   * show popup with hosts generated by pattern
   * @param hostNames
   */
  hostNamePatternPopup: function (hostNames) {
    var self = this;
    App.ModalPopup.show({
      header: Em.I18n.t('installer.step2.hostName.pattern.header'),
      onPrimary: function () {
        self.proceedNext();
        this.hide();
      },
      bodyClass: Ember.View.extend({
        template: Ember.Handlebars.compile(['{{#each host in view.hostNames}}<p>{{host}}</p>{{/each}}'].join('\n')),
        hostNames: hostNames
      })
    });
  },
  /**
   * show notify that installation is manual
   * save hosts
   */
  manualInstallPopup: function () {
    var self = this;
    App.ModalPopup.show({
      header: Em.I18n.t('installer.step2.manualInstall.popup.header'),
      onPrimary: function () {
        this.hide();
        self.saveHosts();
      },
      bodyClass: Ember.View.extend({
        templateName: require('templates/wizard/step2ManualInstallPopup')
      })
    });
  },
  /**
   * warn to manually install ambari-agent on each host
   */
  manualInstallWarningPopup: function(){
    if(!this.get('content.installOptions.useSsh')){
      App.ModalPopup.show({
        header: Em.I18n.t('common.warning'),
        body: Em.I18n.t('installer.step2.manualInstall.info'),
        encodeBody: false,
        onPrimary: function () {
          this.hide();
        },
        secondary: null
      });
    }
    this.set('content.installOptions.manualInstall', !this.get('content.installOptions.useSsh'));
  }.observes('content.installOptions.useSsh'),

  isSubmitDisabled: function () {
    return (this.get('hostsError') || this.get('sshKeyError') || this.get('sshUserError'))  ;
  }.property('hostsError', 'sshKeyError', 'sshUserError'),

  setAmbariJavaHome: function(){
    App.ajax.send({
      name: 'ambari.service',
      sender: this,
      success: 'onGetAmbariJavaHomeSuccess',
      error: 'onGetAmbariJavaHomeError'
    });
  },

  onGetAmbariJavaHomeSuccess: function(data) {
    this.set('content.installOptions.javaHome',data.RootServiceComponents.properties['java.home']);
  },

  onGetAmbariJavaHomeError: function() {
    console.warn('can\'t get java.home value from server');
    this.set('content.installOptions.javaHome',App.defaultJavaHome);
  },

  saveHosts: function(){
    this.set('content.hosts', this.getHostInfo());
    this.setAmbariJavaHome();
    App.router.send('next');
  }

});