/**
 * libtransport -- C++ library for easy XMPP Transports development
 *
 * Copyright (C) 2011, Jan Kaluza <hanzz.k@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
 */

#include "transport/NetworkPlugin.h"
#include "transport/MemoryUsage.h"
#include "transport/Logging.h"

#include <sstream>

#ifndef WIN32
#include <arpa/inet.h>
#include <sys/types.h>
#include <unistd.h>
#else 
#include <winsock2.h>
#include <stdint.h>
#include <process.h>
#define getpid _getpid
#endif

DEFINE_LOGGER(logger, "NetworkPlugin");

namespace Transport {

#define WRAP(MESSAGE, TYPE) 	pbnetwork::WrapperMessage wrap; \
	wrap.set_type(TYPE); \
	wrap.set_payload(MESSAGE); \
	wrap.SerializeToString(&MESSAGE);

template <class T> std::string stringOf(T object) {
	std::ostringstream os;
	os << object;
	return (os.str());
}

NetworkPlugin::NetworkPlugin() {
	m_pingReceived = false;

	double shared;
#ifndef WIN32
	process_mem_usage(shared, m_init_res);
#endif
}

NetworkPlugin::~NetworkPlugin() {
}

void NetworkPlugin::sendConfig(const PluginConfig &cfg) {
	std::string data = "[registration]\n";
	data += std::string("needPassword=") + (cfg.m_needPassword ? "1" : "0") + "\n";
	data += std::string("needRegistration=") + (cfg.m_needRegistration ? "1" : "0") + "\n";

	for (std::vector<std::string>::const_iterator it = cfg.m_extraFields.begin(); it != cfg.m_extraFields.end(); it++) {
		data += std::string("extraField=") + (*it) + "\n";
	}

	data += "[features]\n";
	data += std::string("muc=") + (cfg.m_supportMUC ? "1" : "0") + "\n";
	data += std::string("rawxml=") + (cfg.m_rawXML ? "1" : "0") + "\n";
	data += std::string("disable_jid_escaping=") + (cfg.m_disableJIDEscaping ? "1" : "0") + "\n";
	

	pbnetwork::BackendConfig m;
	m.set_config(data);

	std::string message;
	m.SerializeToString(&message);

	WRAP(message, pbnetwork::WrapperMessage_Type_TYPE_BACKEND_CONFIG);

	send(message);
}

void NetworkPlugin::sendRawXML(std::string &xml) {
	WRAP(xml, pbnetwork::WrapperMessage_Type_TYPE_RAW_XML);

	send(xml);
}

void NetworkPlugin::handleMessage(const std::string &user, const std::string &legacyName, const std::string &msg, const std::string &nickname, const std::string &xhtml, const std::string &timestamp, bool headline, bool pm) {
	pbnetwork::ConversationMessage m;
	m.set_username(user);
	m.set_buddyname(legacyName);
	m.set_message(msg);
	m.set_nickname(nickname);
	m.set_xhtml(xhtml);
	m.set_timestamp(timestamp);
	m.set_headline(headline);
	m.set_pm(pm);

	std::string message;
	m.SerializeToString(&message);

	WRAP(message, pbnetwork::WrapperMessage_Type_TYPE_CONV_MESSAGE);

	send(message);
}

void NetworkPlugin::handleMessageAck(const std::string &user, const std::string &legacyName, const std::string &id) {
	pbnetwork::ConversationMessage m;
	m.set_username(user);
	m.set_buddyname(legacyName);
	m.set_message("");
	m.set_id(id);

	std::string message;
	m.SerializeToString(&message);

	WRAP(message, pbnetwork::WrapperMessage_Type_TYPE_CONV_MESSAGE_ACK);

	send(message);
}

void NetworkPlugin::handleAttention(const std::string &user, const std::string &buddyName, const std::string &msg) {
	pbnetwork::ConversationMessage m;
	m.set_username(user);
	m.set_buddyname(buddyName);
	m.set_message(msg);

	std::string message;
	m.SerializeToString(&message);

	WRAP(message, pbnetwork::WrapperMessage_Type_TYPE_ATTENTION);

	send(message);
}

void NetworkPlugin::handleVCard(const std::string &user, unsigned int id, const std::string &legacyName, const std::string &fullName, const std::string &nickname, const std::string &photo) {
	pbnetwork::VCard vcard;
	vcard.set_username(user);
	vcard.set_buddyname(legacyName);
	vcard.set_id(id);
	vcard.set_fullname(fullName);
	vcard.set_nickname(nickname);
	vcard.set_photo(photo);

	std::string message;
	vcard.SerializeToString(&message);

	WRAP(message, pbnetwork::WrapperMessage_Type_TYPE_VCARD);
	send(message);
}

void NetworkPlugin::handleSubject(const std::string &user, const std::string &legacyName, const std::string &msg, const std::string &nickname) {
	pbnetwork::ConversationMessage m;
	m.set_username(user);
	m.set_buddyname(legacyName);
	m.set_message(msg);
	m.set_nickname(nickname);

	std::string message;
	m.SerializeToString(&message);

	WRAP(message, pbnetwork::WrapperMessage_Type_TYPE_ROOM_SUBJECT_CHANGED);
// 	std::cout << "SENDING MESSAGE\n";

	send(message);
}

void NetworkPlugin::handleBuddyChanged(const std::string &user, const std::string &buddyName, const std::string &alias,
			const std::vector<std::string> &groups, pbnetwork::StatusType status, const std::string &statusMessage, const std::string &iconHash, bool blocked) {
	pbnetwork::Buddy buddy;
	buddy.set_username(user);
	buddy.set_buddyname(buddyName);
	buddy.set_alias(alias);
	for (std::vector<std::string>::const_iterator it = groups.begin(); it != groups.end(); it++) {
		buddy.add_group(*it);
	}
	buddy.set_status((pbnetwork::StatusType) status);
	buddy.set_statusmessage(statusMessage);
	buddy.set_iconhash(iconHash);
	buddy.set_blocked(blocked);

	std::string message;
	buddy.SerializeToString(&message);

	WRAP(message, pbnetwork::WrapperMessage_Type_TYPE_BUDDY_CHANGED);

	send(message);
}

void NetworkPlugin::handleBuddyRemoved(const std::string &user, const std::string &buddyName) {
	pbnetwork::Buddy buddy;
	buddy.set_username(user);
	buddy.set_buddyname(buddyName);

	std::string message;
	buddy.SerializeToString(&message);

	WRAP(message, pbnetwork::WrapperMessage_Type_TYPE_BUDDY_REMOVED);

	send(message);
}

void NetworkPlugin::handleBuddyTyping(const std::string &user, const std::string &buddyName) {
	pbnetwork::Buddy buddy;
	buddy.set_username(user);
	buddy.set_buddyname(buddyName);

	std::string message;
	buddy.SerializeToString(&message);

	WRAP(message, pbnetwork::WrapperMessage_Type_TYPE_BUDDY_TYPING);

	send(message);
}

void NetworkPlugin::handleBuddyTyped(const std::string &user, const std::string &buddyName) {
	pbnetwork::Buddy buddy;
	buddy.set_username(user);
	buddy.set_buddyname(buddyName);

	std::string message;
	buddy.SerializeToString(&message);

	WRAP(message, pbnetwork::WrapperMessage_Type_TYPE_BUDDY_TYPED);

	send(message);
}

void NetworkPlugin::handleBuddyStoppedTyping(const std::string &user, const std::string &buddyName) {
	pbnetwork::Buddy buddy;
	buddy.set_username(user);
	buddy.set_buddyname(buddyName);

	std::string message;
	buddy.SerializeToString(&message);

	WRAP(message, pbnetwork::WrapperMessage_Type_TYPE_BUDDY_STOPPED_TYPING);

	send(message);
}

void NetworkPlugin::handleAuthorization(const std::string &user, const std::string &buddyName) {
	pbnetwork::Buddy buddy;
	buddy.set_username(user);
	buddy.set_buddyname(buddyName);

	std::string message;
	buddy.SerializeToString(&message);

	WRAP(message, pbnetwork::WrapperMessage_Type_TYPE_AUTH_REQUEST);

	send(message);
}

void NetworkPlugin::handleConnected(const std::string &user) {
	pbnetwork::Connected d;
	d.set_user(user);

	std::string message;
	d.SerializeToString(&message);

	WRAP(message, pbnetwork::WrapperMessage_Type_TYPE_CONNECTED);

	send(message);	
}

void NetworkPlugin::handleDisconnected(const std::string &user, int error, const std::string &msg) {
	pbnetwork::Disconnected d;
	d.set_user(user);
	d.set_error(error);
	d.set_message(msg);

	std::string message;
	d.SerializeToString(&message);

	WRAP(message, pbnetwork::WrapperMessage_Type_TYPE_DISCONNECTED);

	send(message);
}

void NetworkPlugin::handleParticipantChanged(const std::string &user, const std::string &nickname, const std::string &room, int flags, pbnetwork::StatusType status, const std::string &statusMessage, const std::string &newname, const std::string &alias) {
	pbnetwork::Participant d;
	d.set_username(user);
	d.set_nickname(nickname);
	d.set_room(room);
	d.set_flag(flags);
	d.set_newname(newname);
	d.set_status((pbnetwork::StatusType) status);
	d.set_statusmessage(statusMessage);
	d.set_alias(alias);

	std::string message;
	d.SerializeToString(&message);

	WRAP(message, pbnetwork::WrapperMessage_Type_TYPE_PARTICIPANT_CHANGED);

	send(message);
}

void NetworkPlugin::handleRoomNicknameChanged(const std::string &user, const std::string &r, const std::string &nickname) {
	pbnetwork::Room room;
	room.set_username(user);
	room.set_nickname(nickname);
	room.set_room(r);
	room.set_password("");

	std::string message;
	room.SerializeToString(&message);

	WRAP(message, pbnetwork::WrapperMessage_Type_TYPE_ROOM_NICKNAME_CHANGED);
 
	send(message);
}

void NetworkPlugin::handleFTStart(const std::string &user, const std::string &buddyName, const std::string fileName, unsigned long size) {
	pbnetwork::File room;
	room.set_username(user);
	room.set_buddyname(buddyName);
	room.set_filename(fileName);
	room.set_size(size);

	std::string message;
	room.SerializeToString(&message);

	WRAP(message, pbnetwork::WrapperMessage_Type_TYPE_FT_START);
 
	send(message);
}

void NetworkPlugin::handleFTFinish(const std::string &user, const std::string &buddyName, const std::string fileName, unsigned long size, unsigned long ftid) {
	pbnetwork::File room;
	room.set_username(user);
	room.set_buddyname(buddyName);
	room.set_filename(fileName);
	room.set_size(size);
	if (ftid) {
		room.set_ftid(ftid);
	}

	std::string message;
	room.SerializeToString(&message);

	WRAP(message, pbnetwork::WrapperMessage_Type_TYPE_FT_FINISH);
 
	send(message);
}

void NetworkPlugin::handleFTData(unsigned long ftID, const std::string &data) {
	pbnetwork::FileTransferData d;
	d.set_ftid(ftID);
	d.set_data(data);

	std::string message;
	d.SerializeToString(&message);

	WRAP(message, pbnetwork::WrapperMessage_Type_TYPE_FT_DATA);
 
	send(message);
}

void NetworkPlugin::handleRoomList(const std::string &user, const std::list<std::string> &rooms, const std::list<std::string> &names) {
	pbnetwork::RoomList d;
	for (std::list<std::string>::const_iterator it = rooms.begin(); it != rooms.end(); it++) {
		d.add_room(*it);
	}

	for (std::list<std::string>::const_iterator it = names.begin(); it != names.end(); it++) {
		d.add_name(*it);
	}

	d.set_user(user);

	std::string message;
	d.SerializeToString(&message);

	WRAP(message, pbnetwork::WrapperMessage_Type_TYPE_ROOM_LIST);
 
	send(message);
}

void NetworkPlugin::handleLoginPayload(const std::string &data) {
	pbnetwork::Login payload;
	if (payload.ParseFromString(data) == false) {
		// TODO: ERROR
		return;
	}
	handleLoginRequest(payload.user(), payload.legacyname(), payload.password());
}

void NetworkPlugin::handleLogoutPayload(const std::string &data) {
	pbnetwork::Logout payload;
	if (payload.ParseFromString(data) == false) {
		// TODO: ERROR
		return;
	}
	handleLogoutRequest(payload.user(), payload.legacyname());
}

void NetworkPlugin::handleStatusChangedPayload(const std::string &data) {
	pbnetwork::Status payload;
	if (payload.ParseFromString(data) == false) {
		// TODO: ERROR
		return;
	}

	handleStatusChangeRequest(payload.username(), payload.status(), payload.statusmessage());
}

void NetworkPlugin::handleConvMessagePayload(const std::string &data) {
	pbnetwork::ConversationMessage payload;
	if (payload.ParseFromString(data) == false) {
		// TODO: ERROR
		return;
	}

	handleMessageSendRequest(payload.username(), payload.buddyname(), payload.message(), payload.xhtml(), payload.id());
}

void NetworkPlugin::handleRoomSubjectChangedPayload(const std::string &data) {
	pbnetwork::ConversationMessage payload;
	if (payload.ParseFromString(data) == false) {
		// TODO: ERROR
		return;
	}

	handleRoomSubjectChangedRequest(payload.username(), payload.buddyname(), payload.message());
}

void NetworkPlugin::handleAttentionPayload(const std::string &data) {
	pbnetwork::ConversationMessage payload;
	if (payload.ParseFromString(data) == false) {
		// TODO: ERROR
		return;
	}

	handleAttentionRequest(payload.username(), payload.buddyname(), payload.message());
}

void NetworkPlugin::handleFTStartPayload(const std::string &data) {
	pbnetwork::File payload;
	if (payload.ParseFromString(data) == false) {
		// TODO: ERROR
		return;
	}

	handleFTStartRequest(payload.username(), payload.buddyname(), payload.filename(), payload.size(), payload.ftid());
}

void NetworkPlugin::handleFTFinishPayload(const std::string &data) {
	pbnetwork::File payload;
	if (payload.ParseFromString(data) == false) {
		// TODO: ERROR
		return;
	}

	handleFTFinishRequest(payload.username(), payload.buddyname(), payload.filename(), payload.size(), payload.ftid());
}

void NetworkPlugin::handleFTPausePayload(const std::string &data) {
	pbnetwork::FileTransferData payload;
	if (payload.ParseFromString(data) == false) {
		// TODO: ERROR
		return;
	}

	handleFTPauseRequest(payload.ftid());
}

void NetworkPlugin::handleFTContinuePayload(const std::string &data) {
	pbnetwork::FileTransferData payload;
	if (payload.ParseFromString(data) == false) {
		// TODO: ERROR
		return;
	}

	handleFTContinueRequest(payload.ftid());
}

void NetworkPlugin::handleJoinRoomPayload(const std::string &data) {
	pbnetwork::Room payload;
	if (payload.ParseFromString(data) == false) {
		// TODO: ERROR
		return;
	}

	handleJoinRoomRequest(payload.username(), payload.room(), payload.nickname(), payload.password());
}

void NetworkPlugin::handleLeaveRoomPayload(const std::string &data) {
	pbnetwork::Room payload;
	if (payload.ParseFromString(data) == false) {
		// TODO: ERROR
		return;
	}

	handleLeaveRoomRequest(payload.username(), payload.room());
}

void NetworkPlugin::handleVCardPayload(const std::string &data) {
	pbnetwork::VCard payload;
	if (payload.ParseFromString(data) == false) {
		// TODO: ERROR
		return;
	}

	if (payload.has_photo()) {
		handleVCardUpdatedRequest(payload.username(), payload.photo(), payload.nickname());
	}
	else if (!payload.buddyname().empty()) {
		handleVCardRequest(payload.username(), payload.buddyname(), payload.id());
	}
}

void NetworkPlugin::handleBuddyChangedPayload(const std::string &data) {
	pbnetwork::Buddy payload;
	if (payload.ParseFromString(data) == false) {
		// TODO: ERROR
		return;
	}
	if (payload.has_blocked()) {
		handleBuddyBlockToggled(payload.username(), payload.buddyname(), payload.blocked());
	}
	else {
		std::vector<std::string> groups;
		for (int i = 0; i < payload.group_size(); i++) {
			groups.push_back(payload.group(i));
		}
		handleBuddyUpdatedRequest(payload.username(), payload.buddyname(), payload.alias(), groups);
	}
}

void NetworkPlugin::handleBuddyRemovedPayload(const std::string &data) {
	pbnetwork::Buddy payload;
	if (payload.ParseFromString(data) == false) {
		// TODO: ERROR
		return;
	}

	std::vector<std::string> groups;
	for (int i = 0; i < payload.group_size(); i++) {
		groups.push_back(payload.group(i));
	}

	handleBuddyRemovedRequest(payload.username(), payload.buddyname(), groups);
}

void NetworkPlugin::handleChatStatePayload(const std::string &data, int type) {
	pbnetwork::Buddy payload;
	if (payload.ParseFromString(data) == false) {
		// TODO: ERROR
		return;
	}

	switch(type) {
		case pbnetwork::WrapperMessage_Type_TYPE_BUDDY_TYPING:
			handleTypingRequest(payload.username(), payload.buddyname());
			break;
		case pbnetwork::WrapperMessage_Type_TYPE_BUDDY_TYPED:
			handleTypedRequest(payload.username(), payload.buddyname());
			break;
		case pbnetwork::WrapperMessage_Type_TYPE_BUDDY_STOPPED_TYPING:
			handleStoppedTypingRequest(payload.username(), payload.buddyname());
			break;
		default:
			break;
	}
}

void NetworkPlugin::handleDataRead(std::string &data) {
	m_data.insert(m_data.end(), data.begin(), data.end());

	while (m_data.size() != 0) {
		unsigned int expected_size;

		if (m_data.size() >= 4) {
			expected_size = *((unsigned int*) &m_data[0]);
			expected_size = ntohl(expected_size);
			if (m_data.size() - 4 < expected_size)
				return;
		}
		else {
			return;
		}

		pbnetwork::WrapperMessage wrapper;
		if (wrapper.ParseFromArray(&m_data[4], expected_size) == false) {
			m_data.erase(m_data.begin(), m_data.begin() + 4 + expected_size);
			return;
		}
		m_data.erase(m_data.begin(), m_data.begin() + 4 + expected_size);

		switch(wrapper.type()) {
			case pbnetwork::WrapperMessage_Type_TYPE_LOGIN:
				handleLoginPayload(wrapper.payload());
				break;
			case pbnetwork::WrapperMessage_Type_TYPE_LOGOUT:
				handleLogoutPayload(wrapper.payload());
				break;
			case pbnetwork::WrapperMessage_Type_TYPE_PING:
				sendPong();
				break;
			case pbnetwork::WrapperMessage_Type_TYPE_CONV_MESSAGE:
				handleConvMessagePayload(wrapper.payload());
				break;
			case pbnetwork::WrapperMessage_Type_TYPE_ROOM_SUBJECT_CHANGED:
				handleRoomSubjectChangedPayload(wrapper.payload());
				break;
			case pbnetwork::WrapperMessage_Type_TYPE_JOIN_ROOM:
				handleJoinRoomPayload(wrapper.payload());
				break;
			case pbnetwork::WrapperMessage_Type_TYPE_LEAVE_ROOM:
				handleLeaveRoomPayload(wrapper.payload());
				break;
			case pbnetwork::WrapperMessage_Type_TYPE_VCARD:
				handleVCardPayload(wrapper.payload());
				break;
			case pbnetwork::WrapperMessage_Type_TYPE_BUDDY_CHANGED:
				handleBuddyChangedPayload(wrapper.payload());
				break;
			case pbnetwork::WrapperMessage_Type_TYPE_BUDDY_REMOVED:
				handleBuddyRemovedPayload(wrapper.payload());
				break;
			case pbnetwork::WrapperMessage_Type_TYPE_STATUS_CHANGED:
				handleStatusChangedPayload(wrapper.payload());
				break;
			case pbnetwork::WrapperMessage_Type_TYPE_BUDDY_TYPING:
				handleChatStatePayload(wrapper.payload(), pbnetwork::WrapperMessage_Type_TYPE_BUDDY_TYPING);
				break;
			case pbnetwork::WrapperMessage_Type_TYPE_BUDDY_TYPED:
				handleChatStatePayload(wrapper.payload(), pbnetwork::WrapperMessage_Type_TYPE_BUDDY_TYPED);
				break;
			case pbnetwork::WrapperMessage_Type_TYPE_BUDDY_STOPPED_TYPING:
				handleChatStatePayload(wrapper.payload(), pbnetwork::WrapperMessage_Type_TYPE_BUDDY_STOPPED_TYPING);
				break;
			case pbnetwork::WrapperMessage_Type_TYPE_ATTENTION:
				handleAttentionPayload(wrapper.payload());
				break;
			case pbnetwork::WrapperMessage_Type_TYPE_FT_START:
				handleFTStartPayload(wrapper.payload());
				break;
			case pbnetwork::WrapperMessage_Type_TYPE_FT_FINISH:
				handleFTFinishPayload(wrapper.payload());
				break;
			case pbnetwork::WrapperMessage_Type_TYPE_FT_PAUSE:
				handleFTPausePayload(wrapper.payload());
				break;
			case pbnetwork::WrapperMessage_Type_TYPE_FT_CONTINUE:
				handleFTContinuePayload(wrapper.payload());
				break;
			case pbnetwork::WrapperMessage_Type_TYPE_EXIT:
				handleExitRequest();
				break;
			case pbnetwork::WrapperMessage_Type_TYPE_RAW_XML:
				handleRawXML(wrapper.payload());
				break;
			default:
				return;
		}
	}
}

void NetworkPlugin::send(const std::string &data) {
	uint32_t size = htonl(data.size());
	char *header = (char *) &size;
	sendData(std::string(header, 4) + data);
}

void NetworkPlugin::checkPing() {
	if (m_pingReceived == false) {
		LOG4CXX_ERROR(logger, "PING request not received - exiting...");
		handleExitRequest();
	}
	m_pingReceived = false;
}

void NetworkPlugin::sendPong() {
	m_pingReceived = true;
	std::string message;
	pbnetwork::WrapperMessage wrap;
	wrap.set_type(pbnetwork::WrapperMessage_Type_TYPE_PONG);
	wrap.SerializeToString(&message);

	send(message);
	sendMemoryUsage();
}

void NetworkPlugin::sendMemoryUsage() {
	pbnetwork::Stats stats;

	stats.set_init_res(m_init_res);
	double res = 0;
	double shared = 0;
#ifndef WIN32
	process_mem_usage(shared, res);
#endif

	double e_res;
	double e_shared;
	handleMemoryUsage(e_res, e_shared);

	stats.set_res(res + e_res);
	stats.set_shared(shared + e_shared);
	stats.set_id(stringOf(getpid()));

	std::string message;
	stats.SerializeToString(&message);

	WRAP(message, pbnetwork::WrapperMessage_Type_TYPE_STATS);

	send(message);
}

}