/*! \file pibroadcast.h
 * \ingroup IO-Utils
 * \~\brief
 * \~english Broadcast for all interfaces, including loopback
 * \~russian Широкое вещание на все интерфейсы, включая loopback
 */
/*
    PIP - Platform Independent Primitives
    Broadcast for all interfaces, including loopback
    Ivan Pelipenko peri4ko@yandex.ru, Andrey Bychkov work.a.b@yandex.ru

    This program 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 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 Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef PIBROADCAST_H
#define PIBROADCAST_H

#include "piethernet.h"
#include "piethutilbase.h"
#include "pip_io_utils_export.h"


//! \~english Broadcast for all interfaces, including loopback
//! \~russian Широкое вещание на все интерфейсы, включая loopback
class PIP_IO_UTILS_EXPORT PIBroadcast
	: public PIThread
	, public PIEthUtilBase {
	PIOBJECT_SUBCLASS(PIBroadcast, PIThread);

public:
	//! \~english %PIBroadcast channels, can be used independently
	//! \~russian Каналы %PIBroadcast, могут использоваться независимо
	enum Channel {
		Multicast /** Use multicast addresses */ = 0x01,
		Broadcast /** Use broadcast addresses */ = 0x02,
		Loopback /** Use loopback addresses */   = 0x04,
		All /** Use all channels */              = 0xFFFF,
	};

	//! \~english Channels flags type
	//! \~russian Тип флагов каналов
	typedef PIFlags<Channel> Channels;

	//! \~english Constructs %PIBroadcast. If "send_only" not set, all PIEthernets will be binded to receive data
	//! \~russian Создает %PIBroadcast. Если "send_only" не установлен, все PIEthernets будут привязаны для приема данных
	PIBroadcast(bool send_only = false);

	//! \~english Destructor
	//! \~russian Деструктор
	~PIBroadcast();

	//! \~english Set channels to "ch" and queue to reinit
	//! \~russian Установить каналы в "ch" и очередь на реинициализацию
	void setChannels(Channels ch);

	//! \~english Returns channels
	//! \~russian Возвращает каналы
	Channels channels() const { return _channels; }

	//! \~english Returns if is send_only
	//! \~russian Возвращает, является ли отправка только
	bool isSendOnly() const { return _send_only; }


	//! \~english Set multicast IP to "mg" and queue to reinit
	//! \~russian Установить multicast IP в "mg" и очередь на реинициализацию
	void setMulticastGroup(const PIString & mg);

	//! \~english Returns multicast IP
	//! \~russian Возвращает multicast IP
	PIString multicastGroup() const { return mcast_address.ipString(); }

	//! \~english Set multicast port to "port" and queue to reinit
	//! \~russian Установить multicast порт в "port" и очередь на реинициализацию
	void setMulticastPort(ushort port);

	//! \~english Returns multicast port
	//! \~russian Возвращает multicast порт
	ushort multicastPort() const { return mcast_address.port(); }

	//! \~english Set multicast address to "addr" and queue to reinit
	//! \~russian Установить multicast адрес в "addr" и очередь на реинициализацию
	void setMulticastAddress(const PINetworkAddress & addr);

	//! \~english Returns multicast address
	//! \~russian Возвращает multicast адрес
	PINetworkAddress multicastAddress() const { return mcast_address; }


	//! \~english Set broadcast port to "port" and queue to reinit
	//! \~russian Установить broadcast порт в "port" и очередь на реинициализацию
	void setBroadcastPort(ushort port);

	//! \~english Returns broadcast port
	//! \~russian Возвращает broadcast порт
	ushort broadcastPort() { return bcast_port; }


	//! \~english Set loopback start port to "port" and queue to reinit
	//! \~russian Установить начальный loopback порт в "port" и очередь на реинициализацию
	void setLoopbackPort(ushort port);

	//! \~english Returns loopback start port
	//! \~russian Возвращает начальный loopback порт
	ushort loopbackPort() { return lo_port; }

	//! \~english Set loopback ports count to "count" and queue to reinit
	//! \~russian Установить количество loopback портов в "count" и очередь на реинициализацию
	void setLoopbackPortsCount(int count);

	//! \~english Returns loopback ports count
	//! \~russian Возвращает количество loopback портов
	int loopbackPortsCount() const { return lo_pcnt; }


	//! \~english If not send_only starts all threaded reads
	//! \~russian Если не send_only запускает все потоковые чтения
	void startRead();

	//! \~english Stop all threaded reads
	//! \~russian Остановить все потоковые чтения
	void stopRead();

	//! \~english Reinit all PIEthernets with current \a PIEthernet::allAddresses()
	//! \~russian Реинициализировать все PIEthernets с текущими \a PIEthernet::allAddresses()
	void reinit();


	//! \~english Send packet
	//! \~russian Отправить пакет
	void send(const PIByteArray & data);

	EVENT1(receiveEvent, PIByteArray, data);

	//! \events
	//! \{

	//! \fn void receiveEvent(PIByteArray data)
	//! \brief Raise on packet received

	//! \}

protected:
	//! Called when packet received
	virtual void received(PIByteArray data) {}

	//! Called when addresses are changed
	virtual void addressesChanged() {}

private:
	EVENT_HANDLER2(void, mcastRead, const uchar *, data, ssize_t, size);
	void destroyAll();
	void initAll(PIVector<PINetworkAddress> al);
	void run() override;

	Channels _channels;
	PINetworkAddress mcast_address;
	PIMutex mcast_mutex;
	PIVector<PIEthernet *> eth_mcast;
	PIEthernet * eth_lo;
	PIVector<PINetworkAddress> prev_al;
	ushort lo_port, bcast_port;
	int lo_pcnt;
	bool _started, _send_only, _reinit;
};

#endif // PIBROADCAST_H