import Component from '@ember/component';
import layout from './template';
import {
  computed, get, set, setProperties, observer
} from '@ember/object';
import { inject as service } from '@ember/service';
import { alias } from '@ember/object/computed';
import { isEmpty } from '@ember/utils';
import C from 'ui/utils/constants';
import { azure as AzureInfo } from './cloud-provider-info';
import { next } from '@ember/runloop';

const azureDefaults = C.AZURE_DEFAULTS;
const GENERIC_PATH  = 'cluster.rancherKubernetesEngineConfig.cloudProvider.cloudConfig';
const AWS_PATH      = 'cluster.rancherKubernetesEngineConfig.cloudProvider.awsCloudProvider';
const AZURE_PATH    = 'cluster.rancherKubernetesEngineConfig.cloudProvider.azureCloudProvider';

export default Component.extend({
  globalStore:           service(),
  layout,
  configType:            null,
  cluster:               null,
  driver:                null,
  selectedCloudProvider: 'none',
  mode:                  'new',
  hasBuiltIn:            false,
  configAnswers:         null,
  clusterTemplateCreate: false,
  configVariable:        null,
  questions:             null,
  azureDefaults,
  azureDescriptions:     AzureInfo,

  configName:            alias('cluster.rancherKubernetesEngineConfig.cloudProvider.name'),

  init() {
    this._super(...arguments);


    const cloudProviderName = get(this, 'cluster.rancherKubernetesEngineConfig.cloudProvider.name');

    if ( cloudProviderName === 'aws' ) {
      setProperties(this, {
        selectedCloudProvider: 'amazonec2',
        configAnswers:         get(this, AWS_PATH)
      });
    } else if ( cloudProviderName === 'azure' ) {
      const reorderedAnswers = this.sortAzureFields(this.globalStore.getById('schema', 'azurecloudprovider'), get(this, AZURE_PATH));

      this.setCpFields(`azureCloudProvider`, reorderedAnswers);

      setProperties(this, {
        selectedCloudProvider: 'azure',
        configAnswers:         reorderedAnswers,
      });
    } else if ( !cloudProviderName ) {
      set(this, 'selectedCloudProvider', 'none');
    } else {
      setProperties(this, {
        selectedCloudProvider: 'generic',
        configAnswers:         get(this, GENERIC_PATH)
      });
    }
  },

  driverDidChange: observer('driver', function() {
    set(this, 'selectedCloudProvider', 'none');
  }),

  modeChanged: observer('selectedCloudProvider', function() {
    let selectedCloudProvider = get(this, 'selectedCloudProvider');

    if ( selectedCloudProvider !== 'none' ) {
      this.constructConfig();
    } else {
      let config = get(this, 'cluster.rancherKubernetesEngineConfig');

      if (config && get(config, 'cloudProvider')) {
        delete config.cloudProvider;
      }
    }
  }),

  configAnswersDidChange: observer('configAnswers', function() {
    const configAnswers         = get(this, 'configAnswers');
    const selectedCloudProvider = get(this, 'selectedCloudProvider');

    switch (selectedCloudProvider) {
    case 'azure':

      set(this, AZURE_PATH, configAnswers);

      break;

    case 'amazonec2':

      set(this, AWS_PATH, configAnswers);

      break;

    default:

      set(this, GENERIC_PATH, configAnswers);

      break;
    }
  }),

  selectedCloudProviderOverrideAvailable: computed(
    'selectedCloudProvider',
    'clusterTemplateCreate',
    'applyClusterTemplate',
    'clusterTemplateRevision.questions',
    'clusterTemplateRevision.id',
    function() {
      let { clusterTemplateRevision, applyClusterTemplate } = this;

      if (applyClusterTemplate && clusterTemplateRevision) {
        if (clusterTemplateRevision.questions) {
          let found = clusterTemplateRevision.questions.filter((ctr) => {
            return ctr.variable.includes('rancherKubernetesEngineConfig.cloudProvider');
          });

          if (found.length === 0 && this.selectedCloudProvider !== 'none') {
            set(this, 'selectedCloudProvider', 'none');
          }

          return found.length >= 1;
        } else {
          if (this.configName) {
            next(() => {
              if ( this.destroyed || this.destroying) {
                return;
              }

              set(this, 'selectedCloudProvider', this.configName);
            });
          }
        }
      } else {
        if (!this.configName) {
          next(() => {
            if ( this.destroyed || this.destroying) {
              return;
            }

            set(this, 'selectedCloudProvider', this.selectedCloudProvider === 'generic' ? 'generic' : 'none');
          });
        }
      }

      return false;
    }),

  isCreateClusterOrClusterTemplate: computed('applyClusterTemplate', function() {
    const { applyClusterTemplate } = this;

    if (applyClusterTemplate) {
      return false;
    } else {
      return true;
    }
  }),

  checkDefaults(record) {
    get(this, 'azureDefaults').forEach((def) => {
      if (isEmpty(record[def])) {
        set(record, def, null);
      }
    });
  },

  sortAzureFields(schema, answers) {
    const schemaFields      = schema.getFieldNames();
    const resourceFields    = get(schema, 'resourceFields');
    const descriptionInfo   = AzureInfo;
    const requiredFields    = schemaFields.filter((item) => get(descriptionInfo, `${ item }.required`)).sort();
    const keysWithoutFields = schemaFields.filter((item) => !requiredFields.includes(item)).sort();
    const prioritizedKeys   = keysWithoutFields.unshiftObjects(requiredFields);
    const reorderedFields   = {};

    // Hack the schema to be required so validation will require them
    requiredFields.forEach((key) => {
      schema.resourceFields[key].required = true;
    });

    prioritizedKeys.forEach((key) => {
      let resourceField = get(resourceFields, key);

      if (answers.hasOwnProperty(key)) {
        set(reorderedFields, key, get(answers, key));
      } else {
        if (get(resourceField, 'type') === 'password') {
          set(reorderedFields, key, null);
        }
      }
    });

    return reorderedFields;
  },

  constructConfig() {
    let nue                   = {};
    let selectedCloudProvider = get(this, 'selectedCloudProvider');
    let cluster               = get(this, 'cluster');
    let config                = get(cluster, 'rancherKubernetesEngineConfig') || set(cluster, 'rancherKubernetesEngineConfig', {});

    switch (selectedCloudProvider) {
    case 'azure':

      nue = get(this, 'globalStore').createRecord({ type: 'azureCloudProvider' });

      delete nue.type;

      this.checkDefaults(nue);

      nue = this.sortAzureFields(this.globalStore.getById('schema', 'azurecloudprovider'), nue);

      set(config, 'cloudProvider', get(this, 'globalStore').createRecord({
        type:               'cloudProvider',
        name:               'azure',
        azureCloudProvider: nue
      }));

      setProperties(this, {
        hasBuiltIn:                              true,
        'cluster.rancherKubernetesEngineConfig': config,
        configAnswers:                           nue,
      });

      break;

    case 'amazonec2':

      nue = get(this, 'globalStore').createRecord({ type: 'awsCloudProvider' });

      set(config, 'cloudProvider', get(this, 'globalStore').createRecord({
        type:             'cloudProvider',
        name:             'aws',
        awsCloudProvider: nue
      }));

      set(this, 'configAnswers', nue);

      break;

    case 'external':

      set(config, 'cloudProvider', get(this, 'globalStore').createRecord({
        type:             'cloudProvider',
        name:             'external',
        awsCloudProvider: nue
      }));

      set(this, 'configAnswers', nue);

      break;

    default:

      set(config, 'cloudProvider', get(this, 'globalStore').createRecord({
        type:        'cloudProvider',
        cloudConfig: nue
      }));

      set(this, 'configAnswers', nue);

      break;
    }
  },

  setCpFields() {
    throw new Error('setCpFields action is required!');
  },

  addOverride() {
    throw new Error('addOverride action is required!');
  },


});