#include "task.h"

#include <unistd.h>
#include <iostream>

Task::Task(const std::vector<std::string>& depends)
	: dependsStr(depends)
{
}

int Task::registerDepTasks(const std::list<std::shared_ptr<Task>>& tasks)
{
	for(auto const& depStr : dependsStr)
	{
		bool found{false};
		for(const auto& task : tasks)
		{
			if(task->target() == depStr)
			{
				dependsTasks.push_back(task);
				found = true;
			}
		}
		if(!found)
		{
			std::cerr << "Could not find dependency " << depStr << " needed by " <<
				target() << " target\n";
			return 1;
		}
	}

	return 0;
}

bool Task::dirty()
{
	for(const auto& task : dependsTasks)
	{
		if(task->dirty())
		{
			return true;
		}
	}

	return dirtyInner();
}

bool Task::ready()
{
	for(const auto& task : dependsTasks)
	{
		if(task->dirty() || task->state() == State::Running)
		{
			return false;
		}
	}

	task_state.store(State::Ready);
	return true;
}

int Task::run()
{
	if(task_state.load() == State::Done)
	{
		return 0;
	}

	task_state.store(State::Running);
	auto ret = runInner();
	if(ret == 0)
	{
		task_state.store(State::Done);
	}
	else
	{
		task_state.store(State::Error);
	}

	return ret;
}

State Task::state() const
{
	return task_state.load();
}