/*
 * 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_elapsed_timer.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.
 */
static constexpr int margin = 30;

class test_elapsed_timer {
protected:
	dukx_context m_ctx;

	test_elapsed_timer()
	{
		duk_push_object(m_ctx);
		duk_put_global_string(m_ctx, "Malikania");
		mlk::dukx_load_elapsedtimer(m_ctx);
	}

	inline void assert_range(int value, int expected) const
	{
		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, test_elapsed_timer)

BOOST_AUTO_TEST_CASE(standard)
{
	try {
		if (duk_peval_string(m_ctx, "timer = new Malikania.ElapsedTimer();") != 0)
			throw dukx_get_exception(m_ctx, -1);

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

		if (duk_peval_string(m_ctx, "result = timer.elapsed();") != 0)
			throw dukx_get_exception(m_ctx, -1);

		duk_get_global_string(m_ctx, "result");
		assert_range(duk_to_int(m_ctx, -1), 300);
		duk_pop(m_ctx);
	} catch (const std::exception &ex) {
		BOOST_FAIL(ex.what());
	}
}

BOOST_AUTO_TEST_CASE(reset)
{
	try {
		if (duk_peval_string(m_ctx, "timer = new Malikania.ElapsedTimer();") != 0)
			throw dukx_get_exception(m_ctx, -1);

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

		if (duk_peval_string(m_ctx, "timer.reset(); result = timer.elapsed();") != 0)
			throw dukx_get_exception(m_ctx, -1);

		duk_get_global_string(m_ctx, "result");
		assert_range(duk_to_int(m_ctx, -1), 0);
		duk_pop(m_ctx);
	} catch (const std::exception &ex) {
		BOOST_FAIL(ex.what());
	}
}

BOOST_AUTO_TEST_CASE(pause)
{
	try {
		if (duk_peval_string(m_ctx, "timer = new Malikania.ElapsedTimer();") != 0)
			throw dukx_get_exception(m_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(m_ctx, "timer.pause();") != 0)
			throw dukx_get_exception(m_ctx, -1);

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

		if (duk_peval_string(m_ctx, "timer.restart();") != 0)
			throw dukx_get_exception(m_ctx, -1);

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

		if (duk_peval_string(m_ctx, "result = timer.elapsed()") != 0)
			throw dukx_get_exception(m_ctx, -1);

		duk_get_global_string(m_ctx, "result");
		assert_range(duk_to_int(m_ctx, -1), 16);
		duk_pop(m_ctx);
	} catch (const std::exception &ex) {
		BOOST_FAIL(ex.what());
	}
}

BOOST_AUTO_TEST_CASE(doublecheck)
{
	try {
		if (duk_peval_string(m_ctx, "timer = new Malikania.ElapsedTimer();") != 0)
			throw dukx_get_exception(m_ctx, -1);

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

		if (duk_peval_string(m_ctx, "result = timer.elapsed()") != 0)
			throw dukx_get_exception(m_ctx, -1);

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

		if (duk_peval_string(m_ctx, "result = timer.elapsed()") != 0)
			throw dukx_get_exception(m_ctx, -1);

		duk_get_global_string(m_ctx, "result");
		assert_range(duk_to_int(m_ctx, -1), 100);
		duk_pop(m_ctx);
	} catch (const std::exception &ex) {
		BOOST_FAIL(ex.what());
	}
}

BOOST_AUTO_TEST_SUITE_END()

} // !namespace

} // !mlk