'use babel';

/**
 * @license
 * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.
 * This code may only be used under the BSD style license found at
 * http://polymer.github.io/LICENSE.txt
 * The complete set of authors may be found at
 * http://polymer.github.io/AUTHORS.txt
 * The complete set of contributors may be found at
 * http://polymer.github.io/CONTRIBUTORS.txt
 * Code distributed by Google as part of the polymer project is also
 * subject to an additional IP rights grant found at
 * http://polymer.github.io/PATENTS.txt
 */


/// <reference path="../custom_typings/main.d.ts" />

import {CompositeDisposable} from 'atom';
import * as lint from 'atom-lint';
import {RemoteEditorService} from 'polymer-editor-service/lib/remote-editor-service';
import * as autocomplete from 'atom-autocomplete-plus';
import Autocompleter from './auto-completer';
import Linter from './linter';
import TooltipManager from './tooltip-manager';

interface ViewState {}

class PolymerIde {
  subscriptions: CompositeDisposable = null;
  linter: Linter = null;
  autocompleter: Autocompleter = null;
  editorService: RemoteEditorService;

  activate(_: ViewState) {
    // Initialize.
    this.linter = new Linter();
    this.autocompleter = new Autocompleter();

    // Events subscribed to in atom's system can be easily cleaned up with a
    // CompositeDisposable
    this.subscriptions = new CompositeDisposable();

    this.subscriptions.add(
        atom.project.onDidChangePaths((projectPaths: string[]) => {
          this.setProjectPaths(projectPaths);
        }));
    this.setProjectPaths(atom.project.getPaths());
    this.subscriptions.add(new TooltipManager(this.editorService));
  };

  deactivate() {
    this.subscriptions.dispose();
    this.subscriptions = null;
    this.editorService = null;
    this.linter = null;
    this.autocompleter = null;
  };

  setProjectPaths(projectPaths: string[]) {
    if (projectPaths.length === 0) {
      this.linter.configurationError = 'polymer-ide only works with projects.';
    } else if (projectPaths.length > 1) {
      this.linter.configurationError =
          `polymer-ide only works with projects with exactly one root ` +
          `directory, this project has: ${JSON.stringify(projectPaths)}`;
    } else {
      const rootDir = projectPaths[0];
      if (this.editorService) {
        this.editorService.dispose();
      }
      this.editorService = new RemoteEditorService(rootDir);
      this.subscriptions.add(this.editorService);
      this.linter.configurationError = null;
      this.linter.editorService = this.editorService;
      this.autocompleter.editorService = this.editorService;
    }
  };

  serialize(): ViewState {
    return {};
  };

  provideLinter(): lint.Provider|lint.Provider[] {
    return this.linter;
  };

  provideAutocompleter(): autocomplete.Provider|autocomplete.Provider[] {
    return this.autocompleter;
  };
};

export default new PolymerIde();