/**
	This file is a part of r0nk, atlas_moon, and rexy's matrix client
	Copyright (C) 2019 rexy712

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU Affero 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 Affero General Public License for more details.

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

#ifndef MATRIX_SYNCER_HPP
#define MATRIX_SYNCER_HPP

#include "raii/curler.hpp"
#include "raii/rjp_ptr.hpp"
#include "raii/rjp_string.hpp"
#include "raii/string.hpp"
#include "matrix/event_info.hpp"
#include "matrix/session_info.hpp"
#include "matrix/client_base.hpp"
#include <cstdlib> //size_t
#include <utility> //forward
#include <functional> //function
#include <memory> //shared_ptr

namespace matrix{
	class session;
	class syncer : public internal::client_base
	{
	friend class ::matrix::session;
	private:
		const std::shared_ptr<internal::session_info> m_ses;

		std::function<void(const msg_info&)> m_message_callback;
		std::function<void(const membership_info&)> m_membership_callback;
		std::function<void(const raii::rjp_ptr&)> m_raw_callback;
		raii::rjp_string m_next_batch;   //string which tracks where we are in the server history

	public:
		syncer(std::shared_ptr<internal::session_info>&);
		syncer(const syncer& b) = default;
		syncer(syncer&& b) = default;
		~syncer(void) = default;

		syncer& operator=(const syncer&) = default;
		syncer& operator=(syncer&&) = default;

		template<class Func>
		void set_message_callback(Func&& f){
			m_message_callback = std::forward<Func>(f);
		}
		template<class Func>
		void set_membership_callback(Func&& f){
			m_membership_callback = std::forward<Func>(f);
		}
		template<class Func>
		void set_raw_callback(Func&& f){
			m_raw_callback = std::forward<Func>(f);
		}
		raii::string sync(size_t timeout);

	private:
		void _handle_membership_events(RJP_value* rooms);
		void _handle_other_membership(RJP_value* join);
		void _handle_invites(RJP_value* invites);
		void _handle_messages(RJP_value* messages);
	};
}

#endif