#include <td/simulation/GameHistory.h>

namespace td {
namespace game {

GameHistory::GameHistory() : m_History(std::numeric_limits<HistorySizeType>::max()) {}

void GameHistory::SetLockStep(HistorySizeType a_Index, protocol::LockStep&& a_LockStep) {
	m_History[a_Index] = std::move(a_LockStep);
}

const protocol::LockStep& GameHistory::GetLockStep(HistorySizeType a_Index) const {
	return *m_History[a_Index];
}

bool GameHistory::HasLockStep(HistorySizeType a_Index) const {
	return m_History[a_Index].has_value();
}

void GameHistory::FromPacket(protocol::pdata::LockSteps&& a_Steps) {
	for (int i = 0; i < LOCKSTEP_BUFFER_SIZE; i++) {
		protocol::LockStep& step = a_Steps.m_LockSteps[i];
		SetLockStep(i + a_Steps.m_FirstFrameNumber, std::move(step));
	}
}

protocol::packets::LockStepsPacket GameHistory::ToPacket(HistorySizeType a_StartIndex) {
	std::array<protocol::LockStep, LOCKSTEP_BUFFER_SIZE> steps;
	for (int i = 0; i < LOCKSTEP_BUFFER_SIZE; i++) {
		steps[i] = GetLockStep(a_StartIndex + i);
	}
	return {a_StartIndex, std::move(steps)};
}

}  // namespace game
}  // namespace td