/* Copyright 2017 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { DefaultExternalServices, PDFViewerApplication } from "./app.js";
import { loadScript, shadow } from "pdfjs-lib";
import { AppOptions } from "./app_options.js";
import { BasePreferences } from "./preferences.js";
import { DownloadManager } from "./download_manager.js";
import { GenericL10n } from "./genericl10n.js";

if (typeof PDFJSDev !== "undefined" && !PDFJSDev.test("GENERIC")) {
  throw new Error(
    'Module "pdfjs-web/genericcom" shall not be used outside ' +
      "GENERIC build."
  );
}

const GenericCom = {};

class GenericPreferences extends BasePreferences {
  async _writeToStorage(prefObj) {
    localStorage.setItem("pdfjs.preferences", JSON.stringify(prefObj));
  }

  async _readFromStorage(prefObj) {
    return JSON.parse(localStorage.getItem("pdfjs.preferences"));
  }
}

class GenericExternalServices extends DefaultExternalServices {
  static createDownloadManager(options) {
    return new DownloadManager();
  }

  static createPreferences() {
    return new GenericPreferences();
  }

  static createL10n({ locale = "en-US" }) {
    return new GenericL10n(locale);
  }

  static get scripting() {
    const promise = loadScript(AppOptions.get("scriptingSrc")).then(() => {
      return window.pdfjsSandbox.QuickJSSandbox();
    });
    const sandbox = {
      createSandbox(data) {
        promise.then(sbx => sbx.create(data));
      },
      dispatchEventInSandbox(event) {
        promise.then(sbx => sbx.dispatchEvent(event));
      },
      destroySandbox() {
        promise.then(sbx => sbx.nukeSandbox());
      },
    };

    return shadow(this, "scripting", sandbox);
  }
}
PDFViewerApplication.externalServices = GenericExternalServices;

export { GenericCom };