/*
 Copyright (C) 2010 Erik Ogenvik <erik@ogenvik.org>

 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 2 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, write to the Free Software Foundation,
 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "Segment.h"
#include <Mercator/Segment.h>
#include <sstream>

namespace Ember {
namespace OgreView {

namespace Terrain {

Segment::Segment(int xIndex, int yIndex, std::function<Mercator::Segment*()>& segmentProvider, std::function<void(Mercator::Segment*)>& segmentInvalidator) :
		mXIndex(xIndex),
		mYIndex(yIndex),
		mSegment(nullptr),
		mSegmentProvider(segmentProvider),
		mSegmentInvalidator(segmentInvalidator) {
}

Segment::~Segment() = default;

Mercator::Segment& Segment::getMercatorSegment() {
	if (!mSegment) {
		mSegment = mSegmentProvider();
	}
	return *mSegment;
}

int Segment::getXIndex() const {
	return mXIndex;

}

int Segment::getYIndex() const {
	return mYIndex;
}

std::string Segment::getKey() const {
	std::stringstream ss;
	ss << getXIndex() << "_" << getYIndex();
	return ss.str();
}

void Segment::invalidate() {
	mSegmentInvalidator(mSegment);
}

bool Segment::hasSegment() const {
	return mSegment != nullptr;
}

}

}
}
