/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

/*
 * Copyright (C) 2006-2010 - Frictional Games
 *
 * This file is part of HPL1 Engine.
 */

#include "hpl1/engine/system/LogicTimer.h"
#include "hpl1/engine/system/low_level_system.h"

namespace hpl {

//////////////////////////////////////////////////////////////////////////
// CONSTRUCTORS
//////////////////////////////////////////////////////////////////////////

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

cLogicTimer::cLogicTimer(int alUpdatesPerSec, LowLevelSystem *apLowLevelSystem) {
	mlMaxUpdates = alUpdatesPerSec;
	mlUpdateCount = 0;

	mpLowLevelSystem = apLowLevelSystem;

	SetUpdatesPerSec(alUpdatesPerSec);
}

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

cLogicTimer::~cLogicTimer() {
}

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

//////////////////////////////////////////////////////////////////////////
// PUBLIC METHODS
//////////////////////////////////////////////////////////////////////////

//-----------------------------------------------------------------------
void cLogicTimer::Reset() {
	mlLocalTime = (double)GetApplicationTime();
}

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

bool cLogicTimer::WantUpdate() {
	++mlUpdateCount;
	if (mlUpdateCount > mlMaxUpdates)
		return false;

	if (mlLocalTime < (double)GetApplicationTime()) {
		Update();
		return true;
	}
	return false;
}

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

void cLogicTimer::EndUpdateLoop() {
	if (mlUpdateCount > mlMaxUpdates) {
		Reset();
	}

	mlUpdateCount = 0;
}

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

void cLogicTimer::SetUpdatesPerSec(int alUpdatesPerSec) {
	mlLocalTimeAdd = 1000.0 / ((double)alUpdatesPerSec);
	Reset();
}

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

void cLogicTimer::SetMaxUpdates(int alMax) {
	mlMaxUpdates = alMax;
}

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

int cLogicTimer::GetUpdatesPerSec() {
	return (int)(1000.0 / ((double)mlLocalTimeAdd));
}

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

float cLogicTimer::GetStepSize() {
	return ((float)mlLocalTimeAdd) / 1000.0f;
}

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

//////////////////////////////////////////////////////////////////////////
// PRIVATE METHODS
//////////////////////////////////////////////////////////////////////////

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

void cLogicTimer::Update() {
	mlLocalTime += mlLocalTimeAdd;
}

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

} // namespace hpl