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

/**
 * Tests if functions inside a single animation frame are recorded and stored
 * for a canvas context profiling.
 */

async function ifTestingSupported() {
  const currentTime = window.performance.now();
  info("Start to estimate WebGL drawArrays function.");
  var { target, front } = await initCanvasDebuggerBackend(WEBGL_DRAW_ARRAYS);

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

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

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

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

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

  let functionCalls = animationOverview.calls;
  ok(functionCalls,
    "An array of function call actors was sent after recording.");

  testFunctionCallTimestamp(functionCalls, currentTime);

  info("Check triangle and vertex counts in drawArrays()");
  is(animationOverview.primitive.tris, 5, "The count of triangles is correct.");
  is(animationOverview.primitive.vertices, 26, "The count of vertices is correct.");
  is(animationOverview.primitive.points, 4, "The count of points is correct.");
  is(animationOverview.primitive.lines, 8, "The count of lines is correct.");

  await removeTab(target.tab);

  info("Start to estimate WebGL drawElements function.");
  const result = await initCanvasDebuggerBackend(WEBGL_DRAW_ELEMENTS);
  target = result.target;
  front = result.front;

  navigated = once(target, "navigate");

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

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

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

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

  functionCalls = animationOverview.calls;
  ok(functionCalls,
    "An array of function call actors was sent after recording.");

  testFunctionCallTimestamp(functionCalls, currentTime);

  info("Check triangle and vertex counts in drawElements()");
  is(animationOverview.primitive.tris, 5, "The count of triangles is correct.");
  is(animationOverview.primitive.vertices, 26, "The count of vertices is correct.");
  is(animationOverview.primitive.points, 4, "The count of points is correct.");
  is(animationOverview.primitive.lines, 8, "The count of lines is correct.");

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

function testFunctionCallTimestamp(functionCalls, currentTime) {
  info("Check the timestamps of function calls");

  for (let i = 0; i < functionCalls.length - 1; i += 2) {
    ok(functionCalls[i].timestamp > 0, "The timestamp of the called function is larger than 0.");
    ok(functionCalls[i].timestamp < currentTime, "The timestamp has been minus the frame start time.");
    ok(functionCalls[i + 1].timestamp >= functionCalls[i].timestamp, "The timestamp of the called function is correct.");
  }
}
