// This file expects `tests` to have been declared in the global scope.
/* global tests */

var RemoteCanvas = function (url, id) {
  this.url = url;
  this.id = id;
  this.snapshot = null;
};

RemoteCanvas.CANVAS_WIDTH = 200;
RemoteCanvas.CANVAS_HEIGHT = 200;

RemoteCanvas.prototype.compare = function (otherCanvas, expected) {
  return compareSnapshots(this.snapshot, otherCanvas.snapshot, expected)[0];
};

RemoteCanvas.prototype.load = function (callback) {
  var iframe = document.createElement("iframe");
  iframe.id = this.id + "-iframe";
  iframe.width = RemoteCanvas.CANVAS_WIDTH + "px";
  iframe.height = RemoteCanvas.CANVAS_HEIGHT + "px";
  iframe.src = this.url;
  var me = this;
  iframe.addEventListener("load", function () {
    info("iframe loaded");
    var m = iframe.contentDocument.getElementById("av");
    m.addEventListener(
      "suspend",
      function () {
        setTimeout(function () {
          let mediaElement =
            iframe.contentDocument.querySelector("audio, video");
          const { widget } = SpecialPowers.wrap(iframe.contentWindow)
            .windowGlobalChild.getActor("UAWidgets")
            .widgets.get(mediaElement);
          widget.impl.Utils.l10n.translateRoots().then(() => {
            me.remotePageLoaded(callback);
          });
        }, 0);
      },
      { once: true }
    );
    m.src = m.getAttribute("source");
  });
  window.document.body.appendChild(iframe);
};

RemoteCanvas.prototype.remotePageLoaded = function (callback) {
  var ldrFrame = document.getElementById(this.id + "-iframe");
  this.snapshot = snapshotWindow(ldrFrame.contentWindow);
  this.snapshot.id = this.id + "-canvas";
  window.document.body.appendChild(this.snapshot);
  callback(this);
};

RemoteCanvas.prototype.cleanup = function () {
  var iframe = document.getElementById(this.id + "-iframe");
  iframe.remove();
  var canvas = document.getElementById(this.id + "-canvas");
  canvas.remove();
};

function runTest(index) {
  var canvases = [];
  function testCallback(canvas) {
    canvases.push(canvas);

    if (canvases.length == 2) {
      // when both canvases are loaded
      var expectedEqual = currentTest.op == "==";
      var result = canvases[0].compare(canvases[1], expectedEqual);
      ok(
        result,
        "Rendering of reftest " +
          currentTest.test +
          " should " +
          (expectedEqual ? "not " : "") +
          "be different to the reference"
      );

      if (result) {
        canvases[0].cleanup();
        canvases[1].cleanup();
      } else {
        info("Snapshot of canvas 1: " + canvases[0].snapshot.toDataURL());
        info("Snapshot of canvas 2: " + canvases[1].snapshot.toDataURL());
      }

      if (index < tests.length - 1) {
        runTest(index + 1);
      } else {
        SimpleTest.finish();
      }
    }
  }

  var currentTest = tests[index];
  var testCanvas = new RemoteCanvas(currentTest.test, "test-" + index);
  testCanvas.load(testCallback);

  var refCanvas = new RemoteCanvas(currentTest.ref, "ref-" + index);
  refCanvas.load(testCallback);
}

SimpleTest.waitForExplicitFinish();
SimpleTest.requestCompleteLog();

window.addEventListener(
  "load",
  function () {
    SpecialPowers.pushPrefEnv(
      { set: [["media.cache_size", 40000]] },
      function () {
        runTest(0);
      }
    );
  },
  true
);
