/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/* eslint-disable rulesdir/no_underscored_properties */

import * as Common from '../common/common.js';
import * as Host from '../host/host.js';

let fileManagerInstance: FileManager|null;

interface SaveCallbackParam {
  fileSystemPath?: string;
}

export class FileManager extends Common.ObjectWrapper.ObjectWrapper {
  _saveCallbacks: Map<string, (arg0: SaveCallbackParam|null) => void>;
  private constructor() {
    super();
    this._saveCallbacks = new Map();
    Host.InspectorFrontendHost.InspectorFrontendHostInstance.events.addEventListener(
        Host.InspectorFrontendHostAPI.Events.SavedURL, this._savedURL, this);
    Host.InspectorFrontendHost.InspectorFrontendHostInstance.events.addEventListener(
        Host.InspectorFrontendHostAPI.Events.CanceledSaveURL, this._canceledSavedURL, this);
    Host.InspectorFrontendHost.InspectorFrontendHostInstance.events.addEventListener(
        Host.InspectorFrontendHostAPI.Events.AppendedToURL, this._appendedToURL, this);
  }

  static instance(opts: {forceNew: boolean|null} = {forceNew: null}): FileManager {
    const {forceNew} = opts;
    if (!fileManagerInstance || forceNew) {
      fileManagerInstance = new FileManager();
    }

    return fileManagerInstance;
  }

  save(url: string, content: string, forceSaveAs: boolean): Promise<SaveCallbackParam|null> {
    // Remove this url from the saved URLs while it is being saved.
    const result = new Promise<SaveCallbackParam|null>(resolve => this._saveCallbacks.set(url, resolve));
    Host.InspectorFrontendHost.InspectorFrontendHostInstance.save(url, content, forceSaveAs);
    return result;
  }

  _savedURL(event: Common.EventTarget.EventTargetEvent): void {
    const url = event.data.url as string;
    const callback = this._saveCallbacks.get(url);
    this._saveCallbacks.delete(url);
    if (callback) {
      callback({fileSystemPath: event.data.fileSystemPath as string});
    }
  }

  _canceledSavedURL(event: Common.EventTarget.EventTargetEvent): void {
    const url = event.data as string;
    const callback = this._saveCallbacks.get(url);
    this._saveCallbacks.delete(url);
    if (callback) {
      callback(null);
    }
  }

  append(url: string, content: string): void {
    Host.InspectorFrontendHost.InspectorFrontendHostInstance.append(url, content);
  }

  close(url: string): void {
    Host.InspectorFrontendHost.InspectorFrontendHostInstance.close(url);
  }

  _appendedToURL(event: Common.EventTarget.EventTargetEvent): void {
    const url = event.data as string;
    this.dispatchEventToListeners(Events.AppendedToURL, url);
  }
}

// TODO(crbug.com/1167717): Make this a const enum again
// eslint-disable-next-line rulesdir/const_enum
export enum Events {
  AppendedToURL = 'AppendedToURL',
}