/**
	This file is a part of 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_ITERABLE_HPP
#define MATRIX_ITERABLE_HPP

#include "matrix/events.hpp"
#include "raii/rjp_string.hpp"
#include "raii/static_string.hpp"
#include "raii/rjp_iterator.hpp"

namespace matrix::sync{

	namespace detail{
		/*
			Class for iterating over an event array returned by a sync
		*/
		template<class T>
		class event_iterator
		{
		protected:
			raii::rjp_array_iterator m_event;
		public:
			constexpr event_iterator(void):
				m_event(nullptr){}
			constexpr event_iterator(RJP_value* v):
				m_event(v){}
			constexpr event_iterator(const event_iterator& i):
				m_event(i.m_event){}
			constexpr bool operator==(const event_iterator& e){
				return m_event == e.m_event;
			}
			constexpr bool operator!=(const event_iterator& e){
				return m_event != e.m_event;
			}
			event_iterator& operator++(void){
				++m_event;
				return *this;
			}
			constexpr T operator*(void){
				return T(*m_event);
			}
		};
		/*
			Class for iterating over an event array associated with a room returned by a sync
		*/
		template<class T>
		class room_event_iterator
		{
		protected:
			raii::rjp_array_iterator m_event;
			raii::static_string m_roomid;
		public:
			constexpr room_event_iterator(void):
				m_event(nullptr), m_roomid(){}
			constexpr room_event_iterator(RJP_value* v, const raii::string_base& roomid):
				m_event(v), m_roomid(roomid){}
			constexpr room_event_iterator(const room_event_iterator& i):
				m_event(i.m_event), m_roomid(i.m_roomid){}
			constexpr room_event_iterator& operator=(const room_event_iterator& i){
				room_event_iterator tmp(i);
				return (*this = std::move(tmp));
			}
			constexpr room_event_iterator& operator=(room_event_iterator&& i){
				m_event = i.m_event;
				m_roomid = i.m_roomid;
				return *this;
			}
			constexpr bool operator==(const room_event_iterator& e){
				return m_event == e.m_event;
			}
			constexpr bool operator!=(const room_event_iterator& e){
				return m_event != e.m_event;
			}
			room_event_iterator& operator++(void){
				++m_event;
				return *this;
			}
			constexpr T operator*(void){
				return T(*m_event, m_roomid);
			}
			constexpr const raii::static_string& roomid(void)const{
				return m_roomid;
			}
		};
	}
	///////////////////////////////////////////////////////////////////////////////////////////////////
	/*
		Base class shared by all room lists
	*/
	template<class T>
	class iterable_event_base
	{
	public:
		using iterator = T;
		using const_iterator = const T;
	protected:
		iterator m_event;
	public:
		constexpr iterable_event_base(void) = default;
		constexpr iterable_event_base(RJP_value* ev):
			m_event(ev){}
		constexpr iterable_event_base(const iterable_event_base& i):
			m_event(i.m_event){}
		constexpr const_iterator& begin(void)const{
			return m_event;
		}
		constexpr iterator& begin(void){
			return m_event;
		}
		constexpr const_iterator end(void)const{
			return const_iterator(nullptr);
		}
	};
	template<class T>
	class iterable_room_event_base
	{
	public:
		using iterator = T;
		using const_iterator = const T;
	protected:
		iterator m_event;
	public:
		constexpr iterable_room_event_base(void) = default;
		constexpr iterable_room_event_base(RJP_value* ev, const raii::string_base& roomid):
			m_event(ev, roomid){}
		constexpr iterable_room_event_base(const iterable_room_event_base& i):
			m_event(i.m_event){}
		constexpr iterable_room_event_base& operator=(const iterable_room_event_base& i){
			iterable_room_event_base tmp(i);
			return (*this = std::move(tmp));
		}
		constexpr iterable_room_event_base& operator=(iterable_room_event_base&& i){
			m_event = i.m_event;
			return *this;
		}
		constexpr const_iterator& begin(void)const{
			return m_event;
		}
		constexpr iterator& begin(void){
			return m_event;
		}
		constexpr const_iterator end(void)const{
			return const_iterator(nullptr, m_event.roomid());
		}
	};
	class event_list : public iterable_event_base<detail::event_iterator<event>>
	{
	public:
		using iterable_event_base<detail::event_iterator<event>>::iterable_event_base;
	};
	//Class representing a list of room state events
	class room_state_event_list : public iterable_room_event_base<detail::room_event_iterator<room_state_event>>
	{
	public:
		using iterable_room_event_base<detail::room_event_iterator<room_state_event>>::iterable_room_event_base;
	};
	//Class representing a list of room events
	class room_event_list : public iterable_room_event_base<detail::room_event_iterator<room_event>>
	{
	public:
		using iterable_room_event_base<detail::room_event_iterator<room_event>>::iterable_room_event_base;
	};
	//Class representing a list of room ephemeral events
	class room_ephem_event_list : public iterable_room_event_base<detail::room_event_iterator<room_ephemeral_event>>
	{
	public:
		using iterable_room_event_base<detail::room_event_iterator<room_ephemeral_event>>::iterable_room_event_base;
	};
	template<class T>
	class roomcxn_event_list_base : public iterable_room_event_base<detail::room_event_iterator<T>>
	{
	protected:
		raii::rjp_ptr m_root;
	public:
		constexpr roomcxn_event_list_base(void) = default;
		roomcxn_event_list_base(raii::rjp_ptr& root, RJP_value* event, const raii::string_base& roomid);
		raii::static_string start_token(void)const&;
		raii::rjp_string start_token(void)&&;
		raii::static_string end_token(void)const&;
		raii::rjp_string end_token(void)&&;
	};
	extern template class roomcxn_event_list_base<room_state_event>;
	class roomcxn_message_event_list : public roomcxn_event_list_base<room_state_event>
	{
	public:
		using roomcxn_event_list_base<room_state_event>::roomcxn_event_list_base;
	};
}

#endif