text: import $ from 'jquery';
  import axios from '~/lib/utils/axios_utils';
  import { deprecatedCreateFlash as createFlash } from '~/flash';
  import { BLOB_EDITOR_ERROR, BLOB_PREVIEW_ERROR } from './constants';
  import TemplateSelectorMediator from '../blob/file_template_mediator';
  import { addEditorMarkdownListeners } from '~/lib/utils/text_markdown';
  import EditorLite from '~/editor/editor_lite';
  import { FileTemplateExtension } from '~/editor/extensions/editor_file_template_ext';
  import { insertFinalNewline } from '~/lib/utils/text_utility';
  
  export default class EditBlob {
    // The options object has:
    // assetsPath, filePath, currentAction, projectId, isMarkdown
    constructor(options) {
      this.options = options;
      this.configureMonacoEditor();
  
      if (this.options.isMarkdown) {
        import('~/editor/extensions/editor_markdown_ext')
          .then(({ EditorMarkdownExtension: MarkdownExtension } = {}) => {
            this.editor.use(new MarkdownExtension());
            addEditorMarkdownListeners(this.editor);
          })
          .catch((e) => createFlash(`${BLOB_EDITOR_ERROR}: ${e}`));
      }
  
      this.initModePanesAndLinks();
      this.initFileSelectors();
      this.initSoftWrap();
      this.editor.focus();
    }
  
    configureMonacoEditor() {
      const editorEl = document.getElementById('editor');
      const fileNameEl = document.getElementById('file_path') || document.getElementById('file_name');
      const fileContentEl = document.getElementById('file-content');
      const form = document.querySelector('.js-edit-blob-form');
  
      const rootEditor = new EditorLite();
  
      this.editor = rootEditor.createInstance({
        el: editorEl,
        blobPath: fileNameEl.value,
        blobContent: editorEl.innerText,
      });
      this.editor.use(new FileTemplateExtension());
  
      fileNameEl.addEventListener('change', () => {
        this.editor.updateModelLanguage(fileNameEl.value);
      });
  
      form.addEventListener('submit', () => {
        fileContentEl.value = insertFinalNewline(this.editor.getValue());
      });
    }
  
    initFileSelectors() {
      const { currentAction, projectId } = this.options;
      this.fileTemplateMediator = new TemplateSelectorMediator({
        currentAction,
        editor: this.editor,
        projectId,
      });
    }
  
    initModePanesAndLinks() {
      this.$editModePanes = $('.js-edit-mode-pane');
      this.$editModeLinks = $('.js-edit-mode a');
      this.$editModeLinks.on('click', (e) => this.editModeLinkClickHandler(e));
    }
  
    editModeLinkClickHandler(e) {
      e.preventDefault();
  
      const currentLink = $(e.target);
      const paneId = currentLink.attr('href');
      const currentPane = this.$editModePanes.filter(paneId);
  
      this.$editModeLinks.parent().removeClass('active hover');
  
      currentLink.parent().addClass('active hover');
  
      this.$editModePanes.hide();
  
      currentPane.fadeIn(200);
  
      if (paneId === '#preview') {
        this.$toggleButton.hide();
        axios
          .post(currentLink.data('previewUrl'), {
            content: this.editor.getValue(),
          })
          .then(({ data }) => {
            currentPane.empty().append(data);
            currentPane.renderGFM();
          })
          .catch(() => createFlash(BLOB_PREVIEW_ERROR));
      }
  
      this.$toggleButton.show();
  
      return this.editor.focus();
    }
  
    initSoftWrap() {
      this.isSoftWrapped = true;
      this.$toggleButton = $('.soft-wrap-toggle');
      this.$toggleButton.toggleClass('soft-wrap-active', this.isSoftWrapped);
      this.$toggleButton.on('click', () => this.toggleSoftWrap());
    }
  
    toggleSoftWrap() {
      this.isSoftWrapped = !this.isSoftWrapped;
      this.$toggleButton.toggleClass('soft-wrap-active', this.isSoftWrapped);
      this.editor.updateOptions({ wordWrap: this.isSoftWrapped ? 'on' : 'off' });
    }
  }
  