/*! \file piclientserver_server.h
 * \ingroup ClientServer
 * \~\brief
 * \~english
 * \~russian
 */
/*
    PIP - Platform Independent Primitives
    Ivan Pelipenko peri4ko@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 piclientserver_server_H
#define piclientserver_server_H

#include "pimutex.h"
#include "pinetworkaddress.h"
#include "pip_client_server_export.h"
#include "pistreampacker.h"
#include "pithreadnotifier.h"

class PIEthernet;
class PIThread;

namespace PIClientServer {

class ServerClient;

//! ~english TCP server for client-server communication
//! ~russian TCP сервер для клиент-серверного взаимодействия
class PIP_CLIENT_SERVER_EXPORT Server: public PIStreamPackerConfig {
	friend class ServerClient;
	NO_COPY_CLASS(Server);

public:
	Server();
	virtual ~Server();

	//! ~english Starts listening on specified address
	//! ~russian Начинает прослушивание на указанном адресе
	void listen(PINetworkAddress addr);

	//! ~english Starts listening on all interfaces
	//! ~russian Начинает прослушивание на всех интерфейсах
	void listenAll(ushort port) { listen({0, port}); }


	//! ~english Stops the server
	//! ~russian Останавливает сервер
	void stopServer();

	//! ~english Closes all client connections
	//! ~russian Закрывает все клиентские соединения
	void closeAll();


	//! ~english Gets maximum allowed clients
	//! ~russian Возвращает максимальное число клиентов
	int getMaxClients() const { return max_clients; }

	//! ~english Sets maximum allowed clients
	//! ~russian Устанавливает максимальное число клиентов
	void setMaxClients(int new_max_clients);

	//! ~english Gets current clients count
	//! ~russian Возвращает текущее количество клиентов
	int clientsCount() const;


	//! ~english Executes function for each connected client
	//! ~russian Выполняет функцию для каждого подключённого клиента
	void forEachClient(std::function<void(ServerClient *)> func);


	//! ~english Sets factory for creating new client instances
	//! ~russian Устанавливает фабрику для создания клиентских экземпляров
	void setClientFactory(std::function<ServerClient *()> f) { client_factory = f; }

private:
	void newClient(ServerClient * c);
	void clientDisconnected(ServerClient * c);

	std::function<ServerClient *()> client_factory;
	std::atomic_bool is_closing = {false};
	PIEthernet * tcp_server     = nullptr;
	PIThread * clean_thread     = nullptr;
	PIThreadNotifier clean_notifier;
	PIVector<ServerClient *> clients;
	mutable PIMutex clients_mutex;

	int max_clients = 1000;
};

} // namespace PIClientServer

#endif