/*-
 * SPDX-License-Identifier: BSD-2-Clause
 * 
 * Copyright (c) 2020 NKI/AVL, Netherlands Cancer Institute
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "cif-tools.hpp"

#include <sys/time.h>
#include <sys/resource.h>

#include <stdexcept>
#include <iostream>
#include <iomanip>
#include <chrono>
#include <cmath>
#include <regex>

#include "cif++/Cif++.hpp"
#include "cif++/CifUtils.hpp"

int pr_main(int argc, char* argv[]);

// --------------------------------------------------------------------

std::ostream& operator<<(std::ostream& os, const struct timeval& t)
{
	uint64_t s = t.tv_sec;
	if (s > 24 * 60 * 60)
	{
		uint32_t days = s / (24 * 60 * 60);
		os << days << "d ";
		s %= 24 * 60 * 60;
	}
	
	if (s > 60 * 60)
	{
		uint32_t hours = s / (60 * 60);
		os << hours << "h ";
		s %= 60 * 60;
	}
	
	if (s > 60)
	{
		uint32_t minutes = s / 60;
		os << minutes << "m ";
		s %= 60;
	}
	
	double ss = s + 1e-6 * t.tv_usec;
	
	os << std::fixed << std::setprecision(1) << ss << 's';

	return os;
}

std::ostream& operator<<(std::ostream& os, const std::chrono::duration<double>& t)
{
	uint64_t s = static_cast<uint64_t>(std::trunc(t.count()));
	if (s > 24 * 60 * 60)
	{
		uint32_t days = s / (24 * 60 * 60);
		os << days << "d ";
		s %= 24 * 60 * 60;
	}
	
	if (s > 60 * 60)
	{
		uint32_t hours = s / (60 * 60);
		os << hours << "h ";
		s %= 60 * 60;
	}
	
	if (s > 60)
	{
		uint32_t minutes = s / 60;
		os << minutes << "m ";
		s %= 60;
	}
	
	double ss = s + 1e-6 * (t.count() - s);
	
	os << std::fixed << std::setprecision(1) << ss << 's';

	return os;
}

class RUsage
{
  public:
	~RUsage()
	{
		if (cif::VERBOSE)
		{
			struct rusage u;
			auto end = std::chrono::system_clock::now();
			std::chrono::duration<double> diff = end - start;
			
			if (getrusage(RUSAGE_SELF, &u) == 0)
				std::cerr << "CPU usage: "
					<< u.ru_utime << " user, "
					<< u.ru_stime << " system, "
					<< diff << " wall" << std::endl;
			else
				perror("Failed to get rusage");
		}
	}

	std::chrono::time_point<std::chrono::system_clock>	start = std::chrono::system_clock::now();
};

// --------------------------------------------------------------------

// recursively print exception whats:
void print_what (const std::exception& e)
{
	std::cerr << e.what() << std::endl;
	try
	{
		std::rethrow_if_nested(e);
	}
	catch (const std::exception& nested)
	{
		std::cerr << " >> ";
		print_what(nested);
	}
}

int main(int argc, char* argv[])
{
	int result = -1;
	
	RUsage r;
	
	try
	{
		result = pr_main(argc, argv);
	}
	catch (std::exception& ex)
	{
		print_what(ex);
		exit(1);
	}

	return result;
}
