/**
	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/>.
*/

#include "matrix/fat_strings.hpp"
#include "matrix/upload_info.hpp"
#include "raii/string_base.hpp"
#include "matrix/json_targets.hpp"
#include "raii/util.hpp"

namespace matrix::json{
	static constexpr auto quote(const raii::string_base& str){
		return "\"" + str + "\"";
	}
	static constexpr auto key(const raii::string_base& str){
		return "\"" + str + "\":";
	}
	static constexpr raii::static_string open_brace(void){
		return "{"_ss;
	}
	static constexpr raii::static_string close_brace(void){
		return "}"_ss;
	}
	static constexpr raii::static_string comma(void){
		return ","_ss;
	}
	template<class Arg, class... Args>
	static constexpr auto object_impl(Arg&& arg, Args&&... args){
		if constexpr(sizeof...(args) > 0){
			return arg + comma() + object_impl(std::forward<Args>(args)...);
		}else{
			return std::forward<Arg>(arg);
		}
	}
	template<class... Args>
	static constexpr auto object(Args&&... args){
		return open_brace() + object_impl(std::forward<Args>(args)...) + close_brace();
	}
	template<class Str1, class Str2>
	static constexpr auto member(Str1&& k, Str2&& value){
		return key(k) + value;
	}

	raii::static_string _empty(void){
		return "{}"_ss;
	}
	raii::string _image_body(const uploaded_image& image){
		raii::string url = raii::json_escape(image.url());
		const raii::string_base* thumburl;
		if(image.thumb_url())
			thumburl = &image.thumb_url();
		else
			thumburl = &url;

		return raii::string(
			object(
				member(json::keys::message::body(), quote(raii::json_escape(image.name()))),
				member(json::keys::message::info(), object(
					member(json::keys::message::infobody::height(), raii::itostr(image.height())),
					member(json::keys::message::infobody::mimetype(), quote(image.mimetype())),
					member(json::keys::message::infobody::size(), raii::itostr(image.size())),
					member(json::keys::message::infobody::thumbinfo(), object(
						member(json::keys::message::infobody::thumbnail::height(), raii::itostr(image.thumb_height())),
						member(json::keys::message::infobody::thumbnail::mimetype(), quote(image.thumb_mimetype())),
						member(json::keys::message::infobody::thumbnail::size(), raii::itostr(image.thumb_size())),
						member(json::keys::message::infobody::thumbnail::width(), raii::itostr(image.thumb_width()))
					)),
					member(json::keys::message::infobody::thumburl(), quote(raii::json_escape(*thumburl))),
					member(json::keys::message::infobody::width(), raii::itostr(image.width()))
				)),
				member(json::keys::message::msgtype(), quote("m.image"_ss)),
				member(json::keys::message::url(), quote(raii::json_escape(url)))
			));
	}

	raii::string _video_body(const uploaded_video& video){
		return raii::string(
			object(
				member(json::keys::message::body(), quote(raii::json_escape(video.name()))),
				member(json::keys::message::info(), object(
					member(json::keys::message::infobody::height(), raii::itostr(video.height())),
					member(json::keys::message::infobody::mimetype(), quote(video.mimetype())),
					member(json::keys::message::infobody::size(), raii::itostr(video.size())),
					member(json::keys::message::infobody::thumbinfo(), object(
						member(json::keys::message::infobody::thumbnail::height(), raii::itostr(video.thumb_height())),
						member(json::keys::message::infobody::thumbnail::mimetype(), quote(video.thumb_mimetype())),
						member(json::keys::message::infobody::thumbnail::size(), raii::itostr(video.thumb_size())),
						member(json::keys::message::infobody::thumbnail::width(), raii::itostr(video.thumb_width()))
					)),
					member(json::keys::message::infobody::thumburl(), quote(raii::json_escape(video.thumb_url()))),
					member(json::keys::message::infobody::width(), raii::itostr(video.width()))
				)),
				member(json::keys::message::msgtype(), quote("m.video"_ss)),
				member(json::keys::message::url(), quote(raii::json_escape(video.url())))
			));
	}
	raii::string _file_body(const uploaded_file& file){
		return raii::string(
			object(
				member(json::keys::message::body(), quote(raii::json_escape(file.name()))),
				member(json::keys::message::info(), object(
					member(json::keys::message::infobody::size(), raii::itostr(file.size()))
				)),
				member(json::keys::message::msgtype(), quote("m.file"_ss)),
				member(json::keys::message::url(), quote(raii::json_escape(file.url())))
			));
	}

	raii::string _audio_body(const uploaded_audio& audio){
		return raii::string(
			object(
				member(json::keys::message::body(), quote(raii::json_escape(audio.name()))),
				member(json::keys::message::info(), object(
					member(json::keys::message::infobody::mimetype(), quote(audio.mimetype())),
					member(json::keys::message::infobody::size(), raii::itostr(audio.size()))
				)),
				member(json::keys::message::msgtype(), quote("m.audio"_ss)),
				member(json::keys::message::url(), quote(raii::json_escape(audio.url())))
			));
	}

	raii::string _message_body(const raii::string_base& msg){
		return raii::string(
			object(
				member(json::keys::message::body(), quote(raii::json_escape(msg))),
				member(json::keys::message::msgtype(), quote("m.text"_ss))
			));
	}
	raii::string _login_password(const raii::string_base& username, const raii::string_base& password){
		return raii::string(
			object(
				member(json::keys::auth::type(), quote("m.login.password"_ss)),
				member(json::keys::auth::identifier(), object(
					member(json::keys::auth::identifierbody::type(), quote("m.id.user"_ss)),
					member(json::keys::auth::identifierbody::user(), quote(raii::json_escape(username)))
				)),
				member(json::keys::auth::password(), quote(raii::json_escape(password)))
			));
	}
	raii::string _change_psk_password(const raii::string_base& userid, const raii::string_base& newpass, const raii::string_base& oldpass, const raii::string_base& session){
		return raii::string(
			object(
				member(json::keys::auth::newpassword(), quote(raii::json_escape(newpass))),
				member(json::keys::auth::auth(), object(
					member(json::keys::auth::authbody::type(), quote("m.login.password"_ss)),
					member(json::keys::auth::authbody::session(), quote(session)),
					member(json::keys::auth::authbody::user(), quote(raii::json_escape(userid))),
					member(json::keys::auth::authbody::password(), quote(raii::json_escape(oldpass)))
				))
			));
	}
	raii::string _displayname_set(const raii::string_base& newname){
		return raii::string(
			object(
				member(json::keys::client::displayname(), quote(raii::json_escape(newname)))
			));
	}
	raii::string _avatar_set(const raii::string_base& mediaurl){
		return raii::string(
			object(
				member(json::keys::client::avatarurl(), quote(raii::json_escape(mediaurl)))
			));
	}
	raii::string _presence_set(const raii::string_base& status){
		return raii::string(
			object(
				member(json::keys::client::presence(), quote(status))
			));
	}
	raii::string _create_room(const raii::string_base& name, const raii::string_base& alias){
		if(alias){
			return raii::string(
				object(
					member(json::keys::client::name(), quote(raii::json_escape(name))),
					member(json::keys::client::roomaliasname(), quote(raii::json_escape(alias)))
				));
		}else{
			return raii::string(
				object(
					member(json::keys::client::name(), quote(raii::json_escape(name)))
				));
		}
	}
	raii::string _userid(const raii::string_base& id){
		return raii::string(
			object(
				member(json::keys::auth::userid(), quote(raii::json_escape(id)))
			));
	}
	raii::string _userid_reason(const raii::string_base& id, const raii::string_base& reason){
		return raii::string(
			object(
				member(json::keys::auth::userid(), quote(raii::json_escape(id))),
				member(json::reason(), quote(raii::json_escape(reason)))
			));
	}
	raii::string _typing(bool active, int timeout){
		return raii::string(
			object(
				member(json::keys::client::typing(), active ? json::True() : json::False()),
				member(json::keys::client::timeout(), raii::itostr(timeout))
			));
	}
	raii::string _redact(const raii::string_base& reason){
		return raii::string(
			object(
				member(json::reason(), quote(raii::json_escape(reason)))
			));
	}
	raii::string _room_upgrade(int version){
		return raii::string(
			object(
				member(json::keys::rooms::newversion(), raii::itostr(version))
			));
	}
}