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

const HIST_NAME = "TELEMETRY_SEND_SUCCESS";
const HIST_NAME2 = "RANGE_CHECKSUM_ERRORS";
const KEYED_HIST = { id: "TELEMETRY_INVALID_PING_TYPE_SUBMITTED", key: "TEST" };

var refObj = {},
  refObj2 = {};

var originalCount1, originalCount2, originalCount3;

function run_test() {
  let histogram = Telemetry.getHistogramById(HIST_NAME);
  let snapshot = histogram.snapshot();
  originalCount1 = Object.values(snapshot.values).reduce((a, b) => (a += b), 0);

  histogram = Telemetry.getHistogramById(HIST_NAME2);
  snapshot = histogram.snapshot();
  originalCount2 = Object.values(snapshot.values).reduce((a, b) => (a += b), 0);

  histogram = Telemetry.getKeyedHistogramById(KEYED_HIST.id);
  snapshot = histogram.snapshot()[KEYED_HIST.key] || { values: [] };
  originalCount3 = Object.values(snapshot.values).reduce((a, b) => (a += b), 0);

  Assert.ok(TelemetryStopwatch.start("mark1"));
  Assert.ok(TelemetryStopwatch.start("mark2"));

  Assert.ok(TelemetryStopwatch.start("mark1", refObj));
  Assert.ok(TelemetryStopwatch.start("mark2", refObj));

  // Same timer can't be re-started before being stopped
  Assert.ok(!TelemetryStopwatch.start("mark1"));
  Assert.ok(!TelemetryStopwatch.start("mark1", refObj));

  // Can't stop a timer that was accidentaly started twice
  Assert.ok(!TelemetryStopwatch.finish("mark1"));
  Assert.ok(!TelemetryStopwatch.finish("mark1", refObj));

  Assert.ok(TelemetryStopwatch.start("NON-EXISTENT_HISTOGRAM"));
  Assert.ok(!TelemetryStopwatch.finish("NON-EXISTENT_HISTOGRAM"));

  Assert.ok(TelemetryStopwatch.start("NON-EXISTENT_HISTOGRAM", refObj));
  Assert.ok(!TelemetryStopwatch.finish("NON-EXISTENT_HISTOGRAM", refObj));

  Assert.ok(!TelemetryStopwatch.running(HIST_NAME));
  Assert.ok(!TelemetryStopwatch.running(HIST_NAME2));
  Assert.ok(!TelemetryStopwatch.running(HIST_NAME, refObj));
  Assert.ok(!TelemetryStopwatch.running(HIST_NAME2, refObj));
  Assert.ok(!TelemetryStopwatch.running(HIST_NAME, refObj2));
  Assert.ok(!TelemetryStopwatch.running(HIST_NAME2, refObj2));

  Assert.ok(TelemetryStopwatch.start(HIST_NAME));
  Assert.ok(TelemetryStopwatch.start(HIST_NAME2));
  Assert.ok(TelemetryStopwatch.start(HIST_NAME, refObj));
  Assert.ok(TelemetryStopwatch.start(HIST_NAME2, refObj));
  Assert.ok(TelemetryStopwatch.start(HIST_NAME, refObj2));
  Assert.ok(TelemetryStopwatch.start(HIST_NAME2, refObj2));

  Assert.ok(TelemetryStopwatch.running(HIST_NAME));
  Assert.ok(TelemetryStopwatch.running(HIST_NAME));
  Assert.ok(TelemetryStopwatch.running(HIST_NAME2));
  Assert.ok(TelemetryStopwatch.running(HIST_NAME, refObj));
  Assert.ok(TelemetryStopwatch.running(HIST_NAME2, refObj));
  Assert.ok(TelemetryStopwatch.running(HIST_NAME, refObj2));
  Assert.ok(TelemetryStopwatch.running(HIST_NAME2, refObj2));

  Assert.ok(TelemetryStopwatch.finish(HIST_NAME));
  Assert.ok(TelemetryStopwatch.finish(HIST_NAME2));
  Assert.ok(TelemetryStopwatch.finish(HIST_NAME, refObj));
  Assert.ok(TelemetryStopwatch.finish(HIST_NAME2, refObj));
  Assert.ok(TelemetryStopwatch.finish(HIST_NAME, refObj2));
  Assert.ok(TelemetryStopwatch.finish(HIST_NAME2, refObj2));

  Assert.ok(!TelemetryStopwatch.running(HIST_NAME));
  Assert.ok(!TelemetryStopwatch.running(HIST_NAME));
  Assert.ok(!TelemetryStopwatch.running(HIST_NAME2));
  Assert.ok(!TelemetryStopwatch.running(HIST_NAME, refObj));
  Assert.ok(!TelemetryStopwatch.running(HIST_NAME2, refObj));
  Assert.ok(!TelemetryStopwatch.running(HIST_NAME, refObj2));
  Assert.ok(!TelemetryStopwatch.running(HIST_NAME2, refObj2));

  // Verify that TS.finish deleted the timers
  Assert.ok(!TelemetryStopwatch.finish(HIST_NAME));
  Assert.ok(!TelemetryStopwatch.finish(HIST_NAME, refObj));

  // Verify that they can be used again
  Assert.ok(TelemetryStopwatch.start(HIST_NAME));
  Assert.ok(TelemetryStopwatch.start(HIST_NAME, refObj));
  Assert.ok(TelemetryStopwatch.finish(HIST_NAME));
  Assert.ok(TelemetryStopwatch.finish(HIST_NAME, refObj));

  Assert.ok(!TelemetryStopwatch.finish("unknown-mark")); // Unknown marker
  Assert.ok(!TelemetryStopwatch.finish("unknown-mark", {})); // Unknown object
  Assert.ok(!TelemetryStopwatch.finish(HIST_NAME, {})); // Known mark on unknown object

  // Test cancel
  Assert.ok(!TelemetryStopwatch.running(HIST_NAME));
  Assert.ok(!TelemetryStopwatch.running(HIST_NAME, refObj));
  Assert.ok(TelemetryStopwatch.start(HIST_NAME));
  Assert.ok(TelemetryStopwatch.start(HIST_NAME, refObj));
  Assert.ok(TelemetryStopwatch.running(HIST_NAME));
  Assert.ok(TelemetryStopwatch.running(HIST_NAME, refObj));
  Assert.ok(TelemetryStopwatch.cancel(HIST_NAME));
  Assert.ok(TelemetryStopwatch.cancel(HIST_NAME, refObj));

  // Verify that can not cancel twice
  Assert.ok(!TelemetryStopwatch.cancel(HIST_NAME));
  Assert.ok(!TelemetryStopwatch.cancel(HIST_NAME, refObj));

  // Verify that cancel removes the timers
  Assert.ok(!TelemetryStopwatch.running(HIST_NAME));
  Assert.ok(!TelemetryStopwatch.running(HIST_NAME, refObj));
  Assert.ok(!TelemetryStopwatch.finish(HIST_NAME));
  Assert.ok(!TelemetryStopwatch.finish(HIST_NAME, refObj));

  // Verify that keyed histograms can be started.
  Assert.ok(!TelemetryStopwatch.runningKeyed("HISTOGRAM", "KEY1"));
  Assert.ok(!TelemetryStopwatch.runningKeyed("HISTOGRAM", "KEY2"));
  Assert.ok(!TelemetryStopwatch.runningKeyed("HISTOGRAM", "KEY1", refObj));
  Assert.ok(!TelemetryStopwatch.runningKeyed("HISTOGRAM", "KEY2", refObj));

  Assert.ok(TelemetryStopwatch.startKeyed("HISTOGRAM", "KEY1"));
  Assert.ok(TelemetryStopwatch.startKeyed("HISTOGRAM", "KEY2"));
  Assert.ok(TelemetryStopwatch.startKeyed("HISTOGRAM", "KEY1", refObj));
  Assert.ok(TelemetryStopwatch.startKeyed("HISTOGRAM", "KEY2", refObj));

  Assert.ok(TelemetryStopwatch.runningKeyed("HISTOGRAM", "KEY1"));
  Assert.ok(TelemetryStopwatch.runningKeyed("HISTOGRAM", "KEY2"));
  Assert.ok(TelemetryStopwatch.runningKeyed("HISTOGRAM", "KEY1", refObj));
  Assert.ok(TelemetryStopwatch.runningKeyed("HISTOGRAM", "KEY2", refObj));

  // Restarting keyed histograms should fail.
  Assert.ok(!TelemetryStopwatch.startKeyed("HISTOGRAM", "KEY1"));
  Assert.ok(!TelemetryStopwatch.startKeyed("HISTOGRAM", "KEY1", refObj));

  // Finishing a stopwatch of a non existing histogram should return false.
  Assert.ok(!TelemetryStopwatch.finishKeyed("HISTOGRAM", "KEY2"));
  Assert.ok(!TelemetryStopwatch.finishKeyed("HISTOGRAM", "KEY2", refObj));

  // Starting & finishing a keyed stopwatch for an existing histogram should work.
  Assert.ok(TelemetryStopwatch.startKeyed(KEYED_HIST.id, KEYED_HIST.key));
  Assert.ok(TelemetryStopwatch.finishKeyed(KEYED_HIST.id, KEYED_HIST.key));
  // Verify that TS.finish deleted the timers
  Assert.ok(!TelemetryStopwatch.runningKeyed(KEYED_HIST.id, KEYED_HIST.key));

  // Verify that they can be used again
  Assert.ok(TelemetryStopwatch.startKeyed(KEYED_HIST.id, KEYED_HIST.key));
  Assert.ok(TelemetryStopwatch.finishKeyed(KEYED_HIST.id, KEYED_HIST.key));

  Assert.ok(!TelemetryStopwatch.finishKeyed("unknown-mark", "unknown-key"));
  Assert.ok(!TelemetryStopwatch.finishKeyed(KEYED_HIST.id, "unknown-key"));

  // Verify that keyed histograms can only be canceled through "keyed" API.
  Assert.ok(TelemetryStopwatch.startKeyed(KEYED_HIST.id, KEYED_HIST.key));
  Assert.throws(
    () => TelemetryStopwatch.cancel(KEYED_HIST.id, KEYED_HIST.key),
    /is not an object/
  );
  Assert.ok(TelemetryStopwatch.cancelKeyed(KEYED_HIST.id, KEYED_HIST.key));
  Assert.ok(!TelemetryStopwatch.cancelKeyed(KEYED_HIST.id, KEYED_HIST.key));

  finishTest();
}

function finishTest() {
  let histogram = Telemetry.getHistogramById(HIST_NAME);
  let snapshot = histogram.snapshot();
  let newCount = Object.values(snapshot.values).reduce((a, b) => (a += b), 0);

  Assert.equal(
    newCount - originalCount1,
    5,
    "The correct number of histograms were added for histogram 1."
  );

  histogram = Telemetry.getHistogramById(HIST_NAME2);
  snapshot = histogram.snapshot();
  newCount = Object.values(snapshot.values).reduce((a, b) => (a += b), 0);

  Assert.equal(
    newCount - originalCount2,
    3,
    "The correct number of histograms were added for histogram 2."
  );

  histogram = Telemetry.getKeyedHistogramById(KEYED_HIST.id);
  snapshot = histogram.snapshot()[KEYED_HIST.key];
  newCount = Object.values(snapshot.values).reduce((a, b) => (a += b), 0);

  Assert.equal(
    newCount - originalCount3,
    2,
    "The correct number of histograms were added for histogram 3."
  );
}
