/* Any copyright is dedicated to the Public Domain.
   http://creativecommons.org/publicdomain/zero/1.0/ */

/**
 * Tests that loops using setTimeout are recorded and stored
 * for a canvas context, and that the generated screenshots are correct.
 */

function* ifTestingSupported() {
  let { target, front } = yield initCanvasDebuggerBackend(SET_TIMEOUT_URL);

  let navigated = once(target, "navigate");

  yield front.setup({ reload: true });
  ok(true, "The front was setup up successfully.");

  yield navigated;
  ok(true, "Target automatically navigated when the front was set up.");

  let snapshotActor = yield front.recordAnimationFrame();
  ok(snapshotActor,
    "A snapshot actor was sent after recording.");

  let animationOverview = yield snapshotActor.getOverview();
  ok(snapshotActor,
    "An animation overview could be retrieved after recording.");

  let functionCalls = animationOverview.calls;
  ok(functionCalls,
    "An array of function call actors was sent after recording.");
  is(functionCalls.length, 8,
    "The number of function call actors is correct.");

  is(functionCalls[0].type, CallWatcherFront.METHOD_FUNCTION,
    "The first called function is correctly identified as a method.");
  is(functionCalls[0].name, "clearRect",
    "The first called function's name is correct.");
  is(functionCalls[0].file, SET_TIMEOUT_URL,
    "The first called function's file is correct.");
  is(functionCalls[0].line, 25,
    "The first called function's line is correct.");
  is(functionCalls[0].argsPreview, "0, 0, 128, 128",
    "The first called function's args preview is correct.");
  is(functionCalls[0].callerPreview, "Object",
    "The first called function's caller preview is correct.");

  is(functionCalls[6].type, CallWatcherFront.METHOD_FUNCTION,
    "The penultimate called function is correctly identified as a method.");
  is(functionCalls[6].name, "fillRect",
    "The penultimate called function's name is correct.");
  is(functionCalls[6].file, SET_TIMEOUT_URL,
    "The penultimate called function's file is correct.");
  is(functionCalls[6].line, 21,
    "The penultimate called function's line is correct.");
  is(functionCalls[6].argsPreview, "10, 10, 55, 50",
    "The penultimate called function's args preview is correct.");
  is(functionCalls[6].callerPreview, "Object",
    "The penultimate called function's caller preview is correct.");

  is(functionCalls[7].type, CallWatcherFront.METHOD_FUNCTION,
    "The last called function is correctly identified as a method.");
  is(functionCalls[7].name, "setTimeout",
    "The last called function's name is correct.");
  is(functionCalls[7].file, SET_TIMEOUT_URL,
    "The last called function's file is correct.");
  is(functionCalls[7].line, 30,
    "The last called function's line is correct.");
  ok(functionCalls[7].argsPreview.includes("Function"),
    "The last called function's args preview is correct.");
  is(functionCalls[7].callerPreview, "Object",
    "The last called function's caller preview is correct.");

  let firstNonDrawCall = yield functionCalls[1].getDetails();
  let secondNonDrawCall = yield functionCalls[3].getDetails();
  let lastNonDrawCall = yield functionCalls[7].getDetails();

  is(firstNonDrawCall.name, "fillStyle",
    "The first non-draw function's name is correct.");
  is(secondNonDrawCall.name, "fillStyle",
    "The second non-draw function's name is correct.");
  is(lastNonDrawCall.name, "setTimeout",
    "The last non-draw function's name is correct.");

  let firstScreenshot = yield snapshotActor.generateScreenshotFor(functionCalls[1]);
  let secondScreenshot = yield snapshotActor.generateScreenshotFor(functionCalls[3]);
  let lastScreenshot = yield snapshotActor.generateScreenshotFor(functionCalls[7]);

  ok(firstScreenshot,
    "A screenshot was successfully retrieved for the first non-draw function.");
  ok(secondScreenshot,
    "A screenshot was successfully retrieved for the second non-draw function.");
  ok(lastScreenshot,
    "A screenshot was successfully retrieved for the last non-draw function.");

  let firstActualScreenshot = yield snapshotActor.generateScreenshotFor(functionCalls[0]);
  ok(sameArray(firstScreenshot.pixels, firstActualScreenshot.pixels),
    "The screenshot for the first non-draw function is correct.");
  is(firstScreenshot.width, 128,
    "The screenshot for the first non-draw function has the correct width.");
  is(firstScreenshot.height, 128,
    "The screenshot for the first non-draw function has the correct height.");

  let secondActualScreenshot = yield snapshotActor.generateScreenshotFor(functionCalls[2]);
  ok(sameArray(secondScreenshot.pixels, secondActualScreenshot.pixels),
    "The screenshot for the second non-draw function is correct.");
  is(secondScreenshot.width, 128,
    "The screenshot for the second non-draw function has the correct width.");
  is(secondScreenshot.height, 128,
    "The screenshot for the second non-draw function has the correct height.");

  let lastActualScreenshot = yield snapshotActor.generateScreenshotFor(functionCalls[6]);
  ok(sameArray(lastScreenshot.pixels, lastActualScreenshot.pixels),
    "The screenshot for the last non-draw function is correct.");
  is(lastScreenshot.width, 128,
    "The screenshot for the last non-draw function has the correct width.");
  is(lastScreenshot.height, 128,
    "The screenshot for the last non-draw function has the correct height.");

  ok(!sameArray(firstScreenshot.pixels, secondScreenshot.pixels),
    "The screenshots taken on consecutive draw calls are different (1).");
  ok(!sameArray(secondScreenshot.pixels, lastScreenshot.pixels),
    "The screenshots taken on consecutive draw calls are different (2).");

  yield removeTab(target.tab);
  finish();
}

function sameArray(a, b) {
  if (a.length != b.length) {
    return false;
  }
  for (let i = 0; i < a.length; i++) {
    if (a[i] !== b[i]) {
      return false;
    }
  }
  return true;
}
