#include <vector>
#include <string>
#include <filesystem>
#include <iostream>
#include <utility>

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

int main(int argc, const char* argv[])
{
	Settings settings;
	settings.builddir = "build/foo";
	std::filesystem::path builddir(settings.builddir);
	std::filesystem::create_directories(builddir);

	auto project = configs();
	std::string output = builddir / project.target;
	const auto& files = project.sources;
	std::vector<std::string> objects;

	std::vector<Task> tasks;

	for(const auto& file : files)
	{
		tasks.emplace_back(project, settings, file);
		objects.push_back(tasks.back().targetFile);
	}

	if(argc == 2 && std::string(argv[1]) == "clean")
	{
		std::cout << "Cleaning\n";
		//std::filesystem::remove_all(builddir);
		for(auto& task : tasks)
		{
			if(task.clean() != 0)
			{
				return 1;
			}
		}

		std::filesystem::remove(output);

		return 0;
	}

	std::cout << "Building\n";
	// Start all tasks
	for(auto& task : tasks)
	{
		task.start();
	}

	// Wait for all tasks
	for(auto& task : tasks)
	{
		if(task.wait() != 0)
		{
			return 1;
		}
	}

	std::cout << "Linking\n";
	bool dolink{false};
	if(!std::filesystem::exists(output))
	{
		dolink = true;
	}
	else
	{
		for(const auto& object : objects)
		{
			if(std::filesystem::last_write_time(output) <=
			   std::filesystem::last_write_time(object))
			{
				dolink = true;
				break;
			}
		}
	}

	if(!dolink)
	{
		std::cout << "No linking needed\n";
		return 0;
	}

	std::string objectlist;
	for(const auto& object : objects)
	{
		objectlist += object + " ";
	}
	std::string compiler = "g++ " + objectlist + " -o " + output;
	std::cout << compiler << "\n";
	if(system(compiler.data()))
	{
		return 1;
	}

	return 0;
}