#include "task_ld.h"

#include <iostream>
#include <fstream>
#include <unistd.h>
#include <cstring>
#include <sys/types.h>
#include <sys/wait.h>
#include <spawn.h>

#include "libcppbuild.h"
#include "settings.h"

TaskLD::TaskLD(const BuildConfiguration& config,
               const Settings& settings,
               const std::string& target,
               const std::vector<std::string>& objects)
	: config(config)
	, settings(settings)
{
	targetFile = settings.builddir;
	targetFile /= target;
	for(const auto& object : objects)
	{
		//std::filesystem::path objectFile = settings.builddir;
		//objectFile /= object;
		std::filesystem::path objectFile = object;
		objectFiles.push_back(objectFile);
	}
}

bool TaskLD::dirty()
{
	if(!std::filesystem::exists(targetFile))
	{
		return true;
	}

	for(const auto& objectFile : objectFiles)
	{
		if(std::filesystem::last_write_time(targetFile) <=
		   std::filesystem::last_write_time(objectFile))
		{
			return true;
		}
	}

	return false;
}

int TaskLD::run()
{
	std::string objectlist;
	for(const auto& objectFile : objectFiles)
	{
		if(!objectlist.empty())
		{
			objectlist += " ";
		}
		objectlist += std::string(objectFile);
	}

	std::string compiler = "g++ " + objectlist + " " +
		config.ldflags + " " +
		"-o " + std::string(targetFile);
	std::cout << compiler << "\n";
	if(system(compiler.data()))
	{
		return 1;
	}
	return 0;
}

int TaskLD::clean()
{
	std::filesystem::remove(targetFile);
	return 0;
}

std::vector<std::string> TaskLD::depends() const
{
	return {};
}

std::string TaskLD::target() const
{
	std::cout << "Removing " << std::string(targetFile) << "\n";
	return std::string(targetFile);
}