/*
 * main.cpp -- test ElapsedTimer (JavaScript binding)
 *
 * Copyright (c) 2013-2018 David Demelier <markand@malikania.fr>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <thread>

#define BOOST_TEST_MODULE "Javascript ElapsedTimer"
#include <boost/format.hpp>
#include <boost/test/unit_test.hpp>

#include <malikania/js/test/js_api_fixture.hpp>

using boost::format;
using boost::str;

using namespace std::chrono_literals;

namespace mlk {

namespace {

/*
 * For all tests, we tolerate 30 ms because some systems have bigger lags.
 */
constexpr int margin = 30;

void assert_range(int value, int expected)
{
	if (value < (expected - margin) || value > (expected + margin))
		throw std::invalid_argument(
			str(format("%d is bigger than [%d, %d]") % value % (expected - margin) % (expected + margin)));
}

BOOST_FIXTURE_TEST_SUITE(test_elapsed_timer_suite, js::test::js_api_fixture)

BOOST_AUTO_TEST_CASE(standard)
{
	if (duk_peval_string(ctx_, "timer = new Malikania.ElapsedTimer();") != 0)
		throw mlk::js::duk::get_stack(ctx_, -1);

	std::this_thread::sleep_for(300ms);

	if (duk_peval_string(ctx_, "result = timer.elapsed();") != 0)
		throw mlk::js::duk::get_stack(ctx_, -1);

	duk_get_global_string(ctx_, "result");
	assert_range(duk_to_int(ctx_, -1), 300);
	duk_pop(ctx_);
}

BOOST_AUTO_TEST_CASE(pause)
{
	if (duk_peval_string(ctx_, "timer = new Malikania.ElapsedTimer();") != 0)
		throw mlk::js::duk::get_stack(ctx_, -1);

	/*
	 * Simulate a pause in the game like this:
	 *
	 * start pause restart elapsed
	 * |   10ms   |.5ms.| 6ms  |
	 *
	 * Since the game was paused, the 5ms must not be totalized.
	 */
	std::this_thread::sleep_for(10ms);

	if (duk_peval_string(ctx_, "timer.pause();") != 0)
		throw mlk::js::duk::get_stack(ctx_, -1);

	std::this_thread::sleep_for(5ms);

	if (duk_peval_string(ctx_, "timer.restart();") != 0)
		throw mlk::js::duk::get_stack(ctx_, -1);

	std::this_thread::sleep_for(6ms);

	if (duk_peval_string(ctx_, "result = timer.elapsed()") != 0)
		throw mlk::js::duk::get_stack(ctx_, -1);

	duk_get_global_string(ctx_, "result");
	assert_range(duk_to_int(ctx_, -1), 16);
	duk_pop(ctx_);
}

BOOST_AUTO_TEST_CASE(doublecheck)
{
	if (duk_peval_string(ctx_, "timer = new Malikania.ElapsedTimer();") != 0)
		throw mlk::js::duk::get_stack(ctx_, -1);

	std::this_thread::sleep_for(50ms);

	if (duk_peval_string(ctx_, "result = timer.elapsed()") != 0)
		throw mlk::js::duk::get_stack(ctx_, -1);

	std::this_thread::sleep_for(50ms);

	if (duk_peval_string(ctx_, "result = timer.elapsed()") != 0)
		throw mlk::js::duk::get_stack(ctx_, -1);

	duk_get_global_string(ctx_, "result");
	assert_range(duk_to_int(ctx_, -1), 100);
	duk_pop(ctx_);
}

BOOST_AUTO_TEST_SUITE_END()

} // !namespace

} // !mlk