/*

 * Hedgewars, a worms-like game

 * Copyright (c) 2005 Andrey Korotaev <unC0Rr@gmail.com>

 *

 * Distributed under the terms of the BSD-modified licence:

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * with the Software without restriction, including without limitation the

 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or

 * sell copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * 1. Redistributions of source code must retain the above copyright notice,

 *    this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright notice,

 *    this list of conditions and the following disclaimer in the documentation

 *    and/or other materials provided with the distribution.

 * 3. The name of the author may not be used to endorse or promote products

 *    derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED

 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO

 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;

 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF

 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include <QMessageBox>

#include "netclient.h"

#include "game.h"

HWNet::HWNet(GameUIConfig * config)

	: QObject()

{

	this->config = config;

	state = nsDisconnected;

	IRCmsg_cmd_text = new QRegExp("^[A-Z]+ :.+$");

	IRCmsg_number_param = new QRegExp("^:\\S+ [0-9]{3} .+$");

	IRCmsg_who_cmd_target = new QRegExp("^:\\S+ [A-Z]+ \\S+$"); // last \\S should mean 'the 1st char is not ":"'

	IRCmsg_who_cmd_text = new QRegExp("^:\\S+ [A-Z]+ :.+$");

	IRCmsg_who_cmd_target_text = new QRegExp("^:\\S+ [A-Z]+ \\S+ :.+$");

	isOp = false;

	teamsCount = 0;

	connect(&NetSocket, SIGNAL(readyRead()), this, SLOT(ClientRead()));

	connect(&NetSocket, SIGNAL(connected()), this, SLOT(OnConnect()));

	connect(&NetSocket, SIGNAL(disconnected()), this, SLOT(OnDisconnect()));

	connect(&NetSocket, SIGNAL(error(QAbstractSocket::SocketError)), this,

			SLOT(displayError(QAbstractSocket::SocketError)));

}

void HWNet::ClientRead()

{

	while (NetSocket.canReadLine())

	{

		ParseLine(NetSocket.readLine().trimmed());

	}

}

void HWNet::displayError(QAbstractSocket::SocketError socketError)

{

	switch (socketError)

	{

		case QAbstractSocket::RemoteHostClosedError:

			break;

		case QAbstractSocket::HostNotFoundError:

			QMessageBox::information(0, tr("Error"),

					tr("The host was not found. Please check the host name and port settings."));

			break;

		case QAbstractSocket::ConnectionRefusedError:

			QMessageBox::information(0, tr("Error"),

					tr("Connection refused"));

			break;

		default:

			QMessageBox::information(0, tr("Error"),

					NetSocket.errorString());

    }

}

void HWNet::Connect(const QString & hostName, quint16 port, const QString & nick)

{

	state = nsConnecting;

	NetSocket.connectToHost(hostName, port);

	mynick = nick;

	opnick = "";

	opCount = 0;

}

void HWNet::OnConnect()

{

	state = nsConnected;

	RawSendNet(QString("USER hwgame 1 2 Hedgewars game"));

	RawSendNet(QString("NICK %1").arg(mynick));

}

void HWNet::OnDisconnect()

{

	state = nsDisconnected;

}

void HWNet::Perform()

{

}

void HWNet::JoinGame(const QString & game)

{

	state = nsJoining;

	RawSendNet(QString("JOIN %1").arg(game));

}

void HWNet::Disconnect()

{

	switch (state)

	{

		case nsDisconnected:

		{

			break;

		}

		case nsConnecting:

		case nsQuitting:

		{

			NetSocket.disconnect();

			break;

		}

		default:

		{

			state = nsQuitting;

			RawSendNet(QString("QUIT :oops"));

		}

	}

}

void HWNet::RawSendNet(const QString & str)

{

	RawSendNet(str.toLatin1());

}

void HWNet::RawSendNet(const QByteArray & buf)

{

	if (buf.size() > 510) return;

	NetSocket.write(buf);

	NetSocket.write("\x0d\x0a", 2);

}

void HWNet::SendNet(const QByteArray & buf)

{

	if ((state == nsGaming) || (state == nsStarting))

	{

		QString msg = QString(buf.toBase64());

		if ((msg == "AUM=") && (mynick == opnick))

		{

			ConfigAsked();

		} else

		if (msg == "AT8=")

		{

			// its ping ("?")

		} else

		{

			if (state == nsGaming)

			{

				NetBuffer += buf;

			} else

			{

				RawSendNet(QString("PRIVMSG %1 :"MAGIC_CHAR MAGIC_CHAR"%2").arg(channel, msg));

			}

		}

	}

}

void HWNet::FlushNetBuf()

{

	if (NetBuffer.size() > 0)

	{

		RawSendNet(QString("PRIVMSG %1 :"MAGIC_CHAR MAGIC_CHAR"%2").arg(channel, QString(NetBuffer.toBase64())));

		NetBuffer.clear();

	}

}

void HWNet::ParseLine(const QString & msg)

{

	//QMessageBox::information(0, "", msg);

	if (IRCmsg_cmd_text->exactMatch(msg))

	{

		msgcmd_textHandler(msg);

	} else

	if (IRCmsg_number_param->exactMatch(msg))

	{

		msgnumber_paramHandler(msg);

	} else

	if (IRCmsg_who_cmd_text->exactMatch(msg))

	{

		msgwho_cmd_textHandler(msg);

	} else

	if (IRCmsg_who_cmd_target->exactMatch(msg))

	{

		msgwho_cmd_targetHandler(msg);

	} else

	if (IRCmsg_who_cmd_target_text->exactMatch(msg))

	{

		msgwho_cmd_target_textHandler(msg);

	}

}

void HWNet::msgcmd_textHandler(const QString & msg)

{

	QStringList list = msg.split(" :");

	if (list[0] == "PING")

	{

		RawSendNet(QString("PONG %1").arg(list[1]));

	}

}

void HWNet::msgnumber_paramHandler(const QString & msg)

{

	int pos = msg.indexOf(" :");

	QString text = msg.mid(pos + 2);

	QStringList list = msg.mid(0, pos).split(" ");

	bool ok;

	quint16 number = list[1].toInt(&ok);

	if (!ok)

		return ;

	switch (number)

	{

		case 001 :

		{

			Perform();

			emit Connected();

			break;

		}

		case 322 : // RPL_LIST

		{

			emit AddGame(list[3]);

			break;

		}

		case 353 : // RPL_NAMREPLY

		{

			QStringList ops = text.split(" ").filter(QRegExp("^@\\S+$"));

			opCount += ops.size();

			if (ops.size() == 1)

			{

				opnick = ops[0].mid(1);

			}

			break;

		}

		case 366 : // RPL_ENDOFNAMES

		{

			if (opCount != 1)

			{

				opnick = "";

			}

			opCount = 0;

			break;

		}

		case 432 : // ERR_ERRONEUSNICKNAME

		case 433 : // ERR_NICKNAMEINUSE

		{

			// ask for another nick

		}

	}

}

void HWNet::msgwho_cmd_targetHandler(const QString & msg)

{

	QStringList list = msg.split(" ");

	QString who = list[0].mid(1).split("!")[0];

	if (list[1] == "NICK")

	{

		if (mynick == who)

			mynick = list[2];

		if (opnick == who)

			opnick = list[2];

	}

}

void HWNet::msgwho_cmd_textHandler(const QString & msg)

{

	int pos = msg.indexOf(" :");

	QString text = msg.mid(pos + 2);

	QStringList list = msg.mid(0, pos).split(" ");

	QString who = list[0].mid(1).split("!")[0];

	if (list[1] == "JOIN")

	{

		if (who == mynick)

		{

			channel = text;

			state = nsJoined;

			emit EnteredGame();

			RawSendNet(QString("PRIVMSG %1 :Hello!").arg(channel));

		}

	}

}

void HWNet::msgwho_cmd_target_textHandler(const QString & msg)

{

	int pos = msg.indexOf(" :");

	QString text = msg.mid(pos + 2);

	QStringList list = msg.mid(0, pos).split(" ");

	QString who = list[0].mid(1).split("!")[0];

	if (list[1] == "PRIVMSG")

	{

		if (list[2] == opnick)

		{

			hwp_opmsg(who, text);

		} else

		if (list[2] == channel)

		{

			hwp_chanmsg(who, text);

		}

	}

}

void HWNet::hwp_opmsg(const QString & who, const QString & msg)

{

	if (state != nsJoined)

		return ;

	if (!msg.startsWith(MAGIC_CHAR))

		return ;

	QStringList list = msg.split(MAGIC_CHAR, QString::SkipEmptyParts);

	if (list[0] == "A")

	{

		list.removeFirst();

		if (list.size() != 9)

			return ;

		if (teamsCount < 5)

		{

			teams[teamsCount].nick = who;

			teams[teamsCount].hhs = list;

			teamsCount++;

			QString teamnames;

			for(int i = 0; i < teamsCount; i++)

			{

				teamnames += MAGIC_CHAR;

				teamnames += teams[i].hhs[0];

			}

			QString tmsg = QString(MAGIC_CHAR"=%2").arg(teamnames);

			RawSendNet(QString("PRIVMSG %1 :").arg(channel) + tmsg);

			hwp_chanmsg(mynick, tmsg);

		}

	}

}

void HWNet::ConfigAsked()

{

	configasks++;

	if (configasks == playerscnt)

	{

		quint32 color = 65535;

		for (int i = 0; i < teamsCount; i++)

		{

			QString msg;

			msg = MAGIC_CHAR "T" MAGIC_CHAR + teams[i].nick + MAGIC_CHAR + teams[i].hhs.join(MAGIC_CHAR);

			RawSendNet(QString("PRIVMSG %1 :%2").arg(channel, msg));

			hwp_chanmsg(mynick, msg);

			QByteArray cache;

			#define ADD(a) { \

							QByteArray strmsg; \

							strmsg.append(a); \

							quint8 sz = strmsg.size(); \

							cache.append(QByteArray((char *)&sz, 1)); \

							cache.append(strmsg); \

							}

			ADD(QString("ecolor %1").arg(color));

			ADD("eadd hh0 0");

			ADD("eadd hh1 0");

			ADD("eadd hh2 0");

			ADD("eadd hh3 0");

			ADD("eadd hh4 0");

			#undef ADD

			QString _msg = MAGIC_CHAR MAGIC_CHAR + QString(cache.toBase64());

			hwp_chanmsg(mynick, _msg);

			RawSendNet(QString("PRIVMSG %1 :").arg(channel) + _msg);

			color <<= 8;

		}

		SENDCFGSTRNET("!");

	}

}

void HWNet::hwp_chanmsg(const QString & who, const QString & msg)

{

	if ((state < nsJoined) || (state > nsGaming))

	{

		return ;

	}

	if (state == nsJoined)

	{

		if (msg.startsWith(MAGIC_CHAR"Start!"MAGIC_CHAR) && (who == opnick))

		{

			state = nsStarting;

			RunGame(msg.mid(8));

			return ;

		}

		if (msg.startsWith(MAGIC_CHAR"="MAGIC_CHAR) && (who == opnick))

		{

			emit ChangeInTeams(msg.mid(3).split(MAGIC_CHAR));

		}

	}

	if (state == nsStarting)

	{

		if (msg == MAGIC_CHAR MAGIC_CHAR "AUM=")

		{

			if (mynick == opnick) ConfigAsked();

			return ;

		}

		if (msg == MAGIC_CHAR MAGIC_CHAR "ASE=")

		{

			state = nsGaming;

			TimerFlusher = new QTimer();

			connect(TimerFlusher, SIGNAL(timeout()), this, SLOT(FlushNetBuf()));

			TimerFlusher->start(2000);

		}

		if (msg.startsWith(MAGIC_CHAR"T"MAGIC_CHAR))

		{

			NetTeamAdded(msg.mid(3));

		}

	}

	if ((state < nsStarting) || (state > nsGaming))

	{

		return;

	}

	if (msg.startsWith(MAGIC_CHAR MAGIC_CHAR)) // HWP message

	{

		QByteArray em = QByteArray::fromBase64(msg.mid(2).toLocal8Bit());

		emit FromNet(em);

	} else // smth other

	{

	}

}

void HWNet::NetTeamAdded(const QString & msg)

{

	QStringList list = msg.split(MAGIC_CHAR, QString::SkipEmptyParts);

	if (list.size() != 10)

		return ;

	SENDCFGSTRLOC("eaddteam");

	if (list[0] == mynick)

	{

		emit LocalCFG(list[1]);

	} else

	{

		SENDCFGSTRLOC("erdriven");

		SENDCFGSTRLOC(QString("ename team %1").arg(list[1]));

		for (int i = 0; i < 8; i++)

		{

			SENDCFGSTRLOC(QString("ename hh%1 ").arg(i) + list[i + 2]);

		}

	}

}

void HWNet::AddTeam(const HWTeam & team)

{

	if (state != nsJoined)

	{

		return ;

	}

	RawSendNet(QString("PRIVMSG %1 :").arg(opnick) + MAGIC_CHAR "A" MAGIC_CHAR +

			team.TeamName + MAGIC_CHAR + team.HHName[0] + MAGIC_CHAR + team.HHName[1] + MAGIC_CHAR +

			team.HHName[2] + MAGIC_CHAR + team.HHName[3] + MAGIC_CHAR + team.HHName[4] + MAGIC_CHAR +

			team.HHName[5] + MAGIC_CHAR + team.HHName[6] + MAGIC_CHAR + team.HHName[7]);

}

void HWNet::StartGame()

{

	if ((opnick != mynick) || (state != nsJoined))

	{

		return ;

	}

	QStringList players;

	for (int i = 0; i < teamsCount; i++)

	{

		if (!players.contains(teams[i].nick))

		{

			players.append(teams[i].nick);

		}

	}

	playerscnt = players.size();

	configasks = 0;

	QString seed;

	seedgen.GenRNDStr(seed, 10);

	QString msg = QString(MAGIC_CHAR"Start!"MAGIC_CHAR"%1").arg(seed);

	RawSendNet(QString("PRIVMSG %1 :%2").arg(channel, msg));

	hwp_chanmsg(mynick, msg);

}

void HWNet::RunGame(const QString & seed)

{

	HWGame * game = new HWGame(config, 0);

	connect(game, SIGNAL(SendNet(const QByteArray &)), this, SLOT(SendNet(const QByteArray &)));

	connect(this, SIGNAL(FromNet(const QByteArray &)), game, SLOT(FromNet(const QByteArray &)));

	connect(this, SIGNAL(LocalCFG(const QString &)), game, SLOT(LocalCFG(const QString &)));

	game->StartNet(seed);