///<reference path="../../../headers/common.d.ts" />

import _ from 'lodash';
import {PanelCtrl} from 'app/plugins/sdk';

export class TextPanelCtrl extends PanelCtrl {
  static templateUrl = `public/app/plugins/panel/text/module.html`;
  static scrollable = true;

  remarkable: any;
  content: string;
  // Set and populate defaults
  panelDefaults = {
    mode    : "markdown", // 'html', 'markdown', 'text'
    content : "# title",
  };

  /** @ngInject **/
  constructor($scope, $injector, private templateSrv, private $sce) {
    super($scope, $injector);

    _.defaults(this.panel, this.panelDefaults);

    this.events.on('init-edit-mode', this.onInitEditMode.bind(this));
    this.events.on('refresh', this.onRefresh.bind(this));
    this.events.on('render', this.onRender.bind(this));

    $scope.$watch('ctrl.panel.content',
     _.throttle(() => {
       this.render();
     }, 1000)
    );
  }

  onInitEditMode() {
    this.addEditorTab('Options', 'public/app/plugins/panel/text/editor.html');
    this.editorTabIndex = 1;

    if (this.panel.mode === 'text') {
      this.panel.mode = 'markdown';
    }
  }

  onRefresh() {
    this.render();
  }

  onRender() {
    if (this.panel.mode === 'markdown') {
      this.renderMarkdown(this.panel.content);
    } else if (this.panel.mode === 'html') {
      this.updateContent(this.panel.content);
    }
    this.renderingCompleted();
  }

  renderText(content) {
    content = content
    .replace(/&/g, '&amp;')
    .replace(/>/g, '&gt;')
    .replace(/</g, '&lt;')
    .replace(/\n/g, '<br/>');
    this.updateContent(content);
  }

  renderMarkdown(content) {
    if (!this.remarkable) {
      return System.import('remarkable').then(Remarkable => {
        this.remarkable = new Remarkable();
        this.$scope.$apply(() => {
          this.updateContent(this.remarkable.render(content));
        });
      });
    }

    this.$scope.$applyAsync(() => {
      this.updateContent(this.remarkable.render(content));
    });
  }

  updateContent(html) {
    try {
      this.content = this.$sce.trustAsHtml(this.templateSrv.replace(html, this.panel.scopedVars));
    } catch (e) {
      console.log('Text panel error: ', e);
      this.content = this.$sce.trustAsHtml(html);
    }
  }
}

export {TextPanelCtrl as PanelCtrl};