/* $Id$ */

/*
 * This file is part of OpenTTD.
 * OpenTTD 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, version 2.
 * OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file network_type.h Types used for networking. */

#ifndef NETWORK_TYPE_H
#define NETWORK_TYPE_H

#include "core/game.h"

/** How many clients can we have */
static const uint MAX_CLIENTS = 255;

/**
 * The number of slots; must be at least 1 more than MAX_CLIENTS. It must
 * furthermore be less than or equal to 256 as client indices (sent over
 * the network) are 8 bits. It needs 1 more for the dedicated server.
 */
static const uint MAX_CLIENT_SLOTS = 256;

/**
 * Vehicletypes in the order they are send in info packets.
 */
enum NetworkVehicleType {
	NETWORK_VEH_TRAIN = 0,
	NETWORK_VEH_LORRY,
	NETWORK_VEH_BUS,
	NETWORK_VEH_PLANE,
	NETWORK_VEH_SHIP,

	NETWORK_VEH_END
};

/** 'Unique' identifier to be given to clients */
enum ClientID : uint32 {
	INVALID_CLIENT_ID = 0, ///< Client is not part of anything
	CLIENT_ID_SERVER  = 1, ///< Servers always have this ID
	CLIENT_ID_FIRST   = 2, ///< The first client ID
};

/** Indices into the client tables */
typedef uint8 ClientIndex;

/** Indices into the admin tables. */
typedef uint8 AdminIndex;

/** Maximum number of allowed admins. */
static const AdminIndex MAX_ADMINS = 16;
/** An invalid admin marker. */
static const AdminIndex INVALID_ADMIN_ID = UINT8_MAX;

/** Simple calculated statistics of a company */
struct NetworkCompanyStats {
	uint16 num_vehicle[NETWORK_VEH_END];            ///< How many vehicles are there of this type?
	uint16 num_station[NETWORK_VEH_END];            ///< How many stations are there of this type?
	bool ai;                                        ///< Is this company an AI
};

/** Some state information of a company, especially for servers */
struct NetworkCompanyState {
	char password[NETWORK_PASSWORD_LENGTH];         ///< The password for the company
	uint16 months_empty;                            ///< How many months the company is empty
};

struct NetworkClientInfo;

/** The type of password we're asking for. */
enum NetworkPasswordType {
	NETWORK_GAME_PASSWORD,    ///< The password of the game.
	NETWORK_COMPANY_PASSWORD, ///< The password of the company.
};

/** Destination of our chat messages. */
enum DestType {
	DESTTYPE_BROADCAST, ///< Send message/notice to all clients (All)
	DESTTYPE_TEAM,      ///< Send message/notice to everyone playing the same company (Team)
	DESTTYPE_CLIENT,    ///< Send message/notice to only a certain client (Private)
	DESTTYPE_BROADCAST_SS, ///< Send message/notice to all clients (All), but tag the broadcast to self as a self-send
};

/** Actions that can be used for NetworkTextMessage */
enum NetworkAction {
	NETWORK_ACTION_JOIN,
	NETWORK_ACTION_LEAVE,
	NETWORK_ACTION_SERVER_MESSAGE,
	NETWORK_ACTION_CHAT,
	NETWORK_ACTION_CHAT_COMPANY,
	NETWORK_ACTION_CHAT_CLIENT,
	NETWORK_ACTION_GIVE_MONEY,
	NETWORK_ACTION_NAME_CHANGE,
	NETWORK_ACTION_COMPANY_SPECTATOR,
	NETWORK_ACTION_COMPANY_JOIN,
	NETWORK_ACTION_COMPANY_NEW,
};

/** The error codes we send around in the protocols. */
enum NetworkErrorCode {
	NETWORK_ERROR_GENERAL, // Try to use this one like never

	/* Signals from clients */
	NETWORK_ERROR_DESYNC,
	NETWORK_ERROR_SAVEGAME_FAILED,
	NETWORK_ERROR_CONNECTION_LOST,
	NETWORK_ERROR_ILLEGAL_PACKET,
	NETWORK_ERROR_NEWGRF_MISMATCH,

	/* Signals from servers */
	NETWORK_ERROR_NOT_AUTHORIZED,
	NETWORK_ERROR_NOT_EXPECTED,
	NETWORK_ERROR_WRONG_REVISION,
	NETWORK_ERROR_NAME_IN_USE,
	NETWORK_ERROR_WRONG_PASSWORD,
	NETWORK_ERROR_COMPANY_MISMATCH, // Happens in CLIENT_COMMAND
	NETWORK_ERROR_KICKED,
	NETWORK_ERROR_CHEATER,
	NETWORK_ERROR_FULL,
	NETWORK_ERROR_TOO_MANY_COMMANDS,
	NETWORK_ERROR_TIMEOUT_PASSWORD,
	NETWORK_ERROR_TIMEOUT_COMPUTER,
	NETWORK_ERROR_TIMEOUT_MAP,
	NETWORK_ERROR_TIMEOUT_JOIN,

	NETWORK_ERROR_END,
};

struct NetworkTextMessageData {
	int64 data;
	int64 auxdata;

	NetworkTextMessageData(int64 data = 0, int64 auxdata = 0)
			: data(data), auxdata(auxdata) { }

	template <typename T> void recv(T *p) {
		this->data = p->Recv_uint64();
		this->auxdata = p->Recv_uint64();
	}

	template <typename T> void send(T *p) const {
		p->Send_uint64(this->data);
		p->Send_uint64(this->auxdata);
	}
};

#endif /* NETWORK_TYPE_H */
