#include "broadcast.h"

Broadcast::Broadcast(bool isServer, QObject* p) : QObject(p)
{
	m_isServer = isServer;
	m_server = new QUdpSocket(this);
	connect(m_server, SIGNAL(readyRead()), this, SLOT(readyRead()));
	connect(&m_timeoutTimer, SIGNAL(timeout()), this, SLOT(clearData()));
	connect(&m_bcTimer, SIGNAL(timeout()), this, SLOT(broadcastClient()));
	m_timeoutTimer.setSingleShot(true);
	m_bcTimer.setSingleShot(true);
	setTimeout(2500);
	setBroadcastInterval(5000);
}

QString Broadcast::getError() const
{
	return m_server->errorString();
}

bool Broadcast::isServer() const
{
	return m_isServer;
}

QByteArray Broadcast::clientData()
{
	return PTSocket::handshakeData() + "bcastc";
}

QByteArray Broadcast::serverData()
{
	return PTSocket::handshakeData() + "bcasts";
}

void Broadcast::setTimeout(int t)
{
	if(m_timeoutTimer.isActive())
		m_timeoutTimer.start(t);
	else
		m_timeoutTimer.setInterval(t);
}

void Broadcast::setBroadcastInterval(int t)
{
	if(m_bcTimer.isActive())
		m_bcTimer.start(t);
	else
		m_bcTimer.setInterval(t);
}

bool Broadcast::start(int port, int r, QHostAddress ad)
{
	m_remotePort = r;
	bool ok = m_server->bind(ad, port);
	if(m_isServer)
		m_server->writeDatagram(serverData(), QHostAddress::Broadcast, m_remotePort);
	else
		broadcastClient();
	return ok;
}

void Broadcast::broadcastClient()
{
	m_server->writeDatagram(clientData(), QHostAddress::Broadcast, m_remotePort);
//	m_bcTimer.start();
}

void Broadcast::readyRead()
{
	while(m_server->hasPendingDatagrams())
	{
		QByteArray data;
		data.resize(m_server->pendingDatagramSize());
		QHostAddress host;
		quint16 port = 0;
		m_server->readDatagram(data.data(), data.size(), &host, &port);
		BcClient client(host.toIPv4Address(), port);
		m_data[client].append(data);
		if(m_isServer)
		{
			if(m_data[client].size() < clientData().size())
				continue;
			if(m_data[client] == clientData())
				m_server->writeDatagram(serverData(), QHostAddress(client.first), m_remotePort);
			m_data.remove(client);
		}
		else
		{
			if(m_data[client].size() < serverData().size())
				continue;
			if(m_data[client] == serverData())
				emit serverDiscovered(QHostAddress(client.first));
			m_data.remove(client);
		}
	}
	m_timeoutTimer.start();
}

void Broadcast::clearData()
{
	m_data.clear();
}