import { inject as service } from '@ember/service';
import { or } from '@ember/object/computed';
import { isBlank } from '@ember/utils';
import { task, waitForEvent } from 'ember-concurrency';
import Component from '@ember/component';
import { set, get } from '@ember/object';
import FocusOnInsertMixin from 'vault/mixins/focus-on-insert';
import keys from 'vault/lib/keycodes';

const LIST_ROOT_ROUTE = 'vault.cluster.secrets.backend.list-root';
const SHOW_ROUTE = 'vault.cluster.secrets.backend.show';

export default Component.extend(FocusOnInsertMixin, {
  router: service(),
  wizard: service(),

  mode: null,
  // TODO: Investigate if we need all of these
  emptyData: '{\n}',
  onDataChange() {},
  onRefresh() {},
  model: null,
  requestInFlight: or('model.isLoading', 'model.isReloading', 'model.isSaving'),

  init() {
    this._super(...arguments);
    this.set('backendType', 'transform');
  },

  willDestroyElement() {
    this._super(...arguments);
    if (this.model && this.model.isError) {
      this.model.rollbackAttributes();
    }
  },

  waitForKeyUp: task(function*() {
    while (true) {
      let event = yield waitForEvent(document.body, 'keyup');
      this.onEscape(event);
    }
  })
    .on('didInsertElement')
    .cancelOn('willDestroyElement'),

  transitionToRoute() {
    this.get('router').transitionTo(...arguments);
  },

  modelPrefixFromType(modelType) {
    let modelPrefix = '';
    if (modelType && modelType.startsWith('transform/')) {
      modelPrefix = `${modelType.replace('transform/', '')}/`;
    }
    return modelPrefix;
  },

  onEscape(e) {
    if (e.keyCode !== keys.ESC || this.get('mode') !== 'show') {
      return;
    }
    this.transitionToRoute(LIST_ROOT_ROUTE);
  },

  hasDataChanges() {
    get(this, 'onDataChange')(get(this, 'model.hasDirtyAttributes'));
  },

  persist(method, successCallback) {
    const model = get(this, 'model');
    return model[method]().then(() => {
      if (!get(model, 'isError')) {
        if (this.get('wizard.featureState') === 'role') {
          this.get('wizard').transitionFeatureMachine('role', 'CONTINUE', this.get('backendType'));
        }
        successCallback(model);
      }
    });
  },

  actions: {
    createOrUpdate(type, event) {
      event.preventDefault();
      const modelId = this.get('model.id') || this.get('model.name'); // transform comes in as model.name
      const modelPrefix = this.modelPrefixFromType(this.get('model.constructor.modelName'));
      // prevent from submitting if there's no key
      // maybe do something fancier later
      if (type === 'create' && isBlank(modelId)) {
        return;
      }

      this.persist('save', () => {
        this.hasDataChanges();
        this.transitionToRoute(SHOW_ROUTE, `${modelPrefix}${modelId}`);
      });
    },

    setValue(key, event) {
      set(get(this, 'model'), key, event.target.checked);
    },

    refresh() {
      this.get('onRefresh')();
    },

    delete() {
      this.persist('destroyRecord', () => {
        this.hasDataChanges();
        this.transitionToRoute(LIST_ROOT_ROUTE);
      });
    },
  },
});