/*! \file picloudserver.h
 * \ingroup Cloud
 * \~\brief
 * \~english PICloud Server
 * \~russian Сервер PICloud
 */
/*
    PIP - Platform Independent Primitives
    PICloud Server
    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 PICLOUDSERVER_H
#define PICLOUDSERVER_H

#include "picloudbase.h"
#include "piconditionvar.h"


class PIP_CLOUD_EXPORT PICloudServer
	: public PIIODevice
	, public PICloudBase {
	PIIODEVICE(PICloudServer, "");

public:
	//! PICloudServer
	explicit PICloudServer(const PIString & path = PIString(), PIIODevice::DeviceMode mode = PIIODevice::ReadWrite);
	virtual ~PICloudServer();

	class Client: public PIIODevice {
		PIIODEVICE(PICloudServer::Client, "");
		friend class PICloudServer;

	public:
		Client(PICloudServer * srv = nullptr, uint id = 0);
		virtual ~Client();

	protected:
		bool openDevice() override;
		bool closeDevice() override;
		ssize_t readDevice(void * read_to, ssize_t max_size) override;
		ssize_t writeDevice(const void * data, ssize_t size) override;
		DeviceInfoFlags deviceInfoFlags() const override { return PIIODevice::Reliable; }
		ssize_t bytesAvailable() const override { return buff.size(); }
		void interrupt() override;

	private:
		void pushBuffer(const PIByteArray & ba);
		PICloudServer * server;
		uint client_id;
		PIByteArray buff;
		PIMutex mutex_buff;
		PIConditionVariable cond_buff;
		std::atomic_bool is_connected;
	};

	void setServerName(const PIString & server_name);

	PIVector<PICloudServer::Client *> clients() const;

	EVENT1(newConnection, PICloudServer::Client *, client);

protected:
	bool openDevice() override;
	bool closeDevice() override;
	ssize_t readDevice(void * read_to, ssize_t max_size) override;
	ssize_t writeDevice(const void * data, ssize_t max_size) override;
	void interrupt() override;

private:
	EVENT_HANDLER1(void, _readed, PIByteArray &, ba);
	EVENT_HANDLER1(void, clientDeleted, PIObject *, o);
	void clientDisconnect(uint client_id);
	int sendData(const PIByteArray & data, uint client_id);

	PIVector<Client *> clients_;
	PIVector<Client *> removed_clients_;
	PIMap<uint, Client *> index_clients;
	PIThread ping_timer;
	PIConditionVariable cvar;
	PIMutex open_mutex;
	mutable PIMutex clients_mutex;
	std::atomic_bool is_deleted;
};

#endif // PICLOUDSERVER_H