/* Copyright 2014 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.
 */

"use strict";

if (!pdfjsLib.getDocument || !pdfjsViewer.PDFViewer) {
  // eslint-disable-next-line no-alert
  alert("Please build the pdfjs-dist library using\n  `gulp dist-install`");
}

// The workerSrc property shall be specified.
//
pdfjsLib.GlobalWorkerOptions.workerSrc =
  "../../node_modules/pdfjs-dist/build/pdf.worker.js";

// Some PDFs need external cmaps.
//
const CMAP_URL = "../../node_modules/pdfjs-dist/cmaps/";
const CMAP_PACKED = true;

const DEFAULT_URL = "../../web/compressed.tracemonkey-pldi-09.pdf";

const container = document.getElementById("viewerContainer");

const eventBus = new pdfjsViewer.EventBus();

// (Optionally) enable hyperlinks within PDF files.
const pdfLinkService = new pdfjsViewer.PDFLinkService({
  eventBus,
});

const pdfViewer = new pdfjsViewer.PDFViewer({
  container,
  eventBus,
  linkService: pdfLinkService,
  renderer: "svg",
  textLayerMode: 0,
});
pdfLinkService.setViewer(pdfViewer);

eventBus.on("pagesinit", function () {
  // We can use pdfViewer now, e.g. let's change default scale.
  pdfViewer.currentScaleValue = "page-width";
});

// Loading document.
const loadingTask = pdfjsLib.getDocument({
  url: DEFAULT_URL,
  cMapUrl: CMAP_URL,
  cMapPacked: CMAP_PACKED,
});
loadingTask.promise.then(function (pdfDocument) {
  // Document loaded, specifying document for the viewer and
  // the (optional) linkService.
  pdfViewer.setDocument(pdfDocument);

  pdfLinkService.setDocument(pdfDocument, null);
});
