/*-----------------------------------------------------------------------------
 * datagram.cpp
 * Copyright (C) 2004, 2005  Akito Nozaki
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Original code came from cutestuff bytestream.h and cpp by Justin K.
 * Converted to use Tanoshi library stuff.
 *
 */

#include <memory>

#include <tanoshi/datagram.h>
#include <tanoshi/datagram_p.h>

NAMESPACE_TANOSHI
{
	//============================================
	// DataGramPrivate code starts here
	DataGramPrivate::DataGramPrivate()
	{
	}

	DataGramPrivate::~DataGramPrivate()
	{
	}

	void DataGramPrivate::reset()
	{
		resetReadBuffer();
		resetWriteBuffer();
	}

	void DataGramPrivate::resetReadBuffer()
	{
		while(readBuf.size())
		{
			delete readBuf.front();
			readBuf.pop();
		}
	}

	void DataGramPrivate::resetWriteBuffer()
	{
		while(writeBuf.size())
		{
			delete writeBuf.front();
			writeBuf.pop();
		}
	}
	
	//============================================
	// DataGram code starts here
	DataGram::DataGram(Object *parent)
		: Object(parent), d(new DataGramPrivate)
	{
	}

	DataGram::~DataGram()
	{
	}

	bool DataGram::isOpen() const
	{
		return false;
	}

	void DataGram::close()
	{
	}

	void DataGram::write(DGramPacket *dgp)
	{
		if(isOpen())
			return;

		bool doWrite = packetsToWrite() == 0 ? true : false;
		appendWrite(dgp);
	}

	DGramPacket *DataGram::read()
	{
		return takeRead();
	}

	int DataGram::packetsAvailable() const
	{
		return d->readBuf.size();
	}

	int DataGram::packetsToWrite() const
	{
		return d->writeBuf.size();
	}

	void DataGram::clearReadBuffer()
	{
		d->resetReadBuffer();
	}

	void DataGram::clearWriteBuffer()
	{
		d->resetWriteBuffer();
	}

	void DataGram::appendRead(DGramPacket *dgp)
	{
		d->readBuf.push(dgp);
	}

	void DataGram::appendWrite(DGramPacket *dgp)
	{
		d->writeBuf.push(dgp);
	}

	// TODO del == false this will cause problems!!
	DGramPacket *DataGram::takeRead(bool del)
	{
		if(!packetsAvailable())
			return NULL;
		
		DGramPacket *t(d->readBuf.front());
		if(del)
		{
			d->readBuf.pop();
		}

		return t;
	}

	// TODO 
	DGramPacket *DataGram::takeWrite(bool del)
	{
		if(!packetsToWrite())
			return NULL;
		
		DGramPacket *t(d->writeBuf.front());
		if(del)
		{
			d->writeBuf.pop();
		}

		return t;
	}

	std::queue<DGramPacket *> &DataGram::readBuf()
	{
		return d->readBuf;
	}
	
	std::queue<DGramPacket *> &DataGram::writeBuf()
	{
		return d->writeBuf;
	}
	
	int DataGram::tryWrite()
	{
		return -1;
	}
}