/*

 * Hedgewars, a free turn based strategy game

 * Copyright (C) 2012 Simeon Maxein <smaxein@googlemail.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  02110-1301, USA.

 */

#ifndef NETCONN_H_

#define NETCONN_H_

#include "../model/gamesetup.h"

#include "../model/scheme.h"

#include <stddef.h>

#include <stdint.h>

#include <stdbool.h>

#define NETCONN_STATE_CONNECTING 0

#define NETCONN_STATE_LOBBY 1

#define NETCONN_STATE_ROOM 2

#define NETCONN_STATE_INGAME 3

#define NETCONN_STATE_DISCONNECTED 10

#define NETCONN_DISCONNECT_NORMAL 0

#define NETCONN_DISCONNECT_SERVER_TOO_OLD 1

#define NETCONN_DISCONNECT_AUTH_FAILED 2 // TODO can you retry instead?

#define NETCONN_DISCONNECT_CONNLOST 3

#define NETCONN_DISCONNECT_INTERNAL_ERROR 100

#define NETCONN_ROOMLEAVE_ABANDONED 0

#define NETCONN_ROOMLEAVE_KICKED 1

#define NETCONN_MSG_TYPE_PLAYERINFO 0

#define NETCONN_MSG_TYPE_SERVERMESSAGE 1

#define NETCONN_MSG_TYPE_WARNING 2

#define NETCONN_MSG_TYPE_ERROR 3

#define NETCONN_MAPCHANGE_FULL 0

#define NETCONN_MAPCHANGE_MAP 1

#define NETCONN_MAPCHANGE_MAPGEN 2

#define NETCONN_MAPCHANGE_DRAWNMAP 3

#define NETCONN_MAPCHANGE_MAZE_SIZE 4

#define NETCONN_MAPCHANGE_TEMPLATE 5

#define NETCONN_MAPCHANGE_THEME 6

#define NETCONN_MAPCHANGE_SEED 7

// TODO: Order of functions, and match the order in netconn.c

typedef struct _flib_netconn flib_netconn;

/**

 * Create a new netplay connection with these parameters.

 * The path to the data directory must end with a path delimiter (e.g. C:\Games\Hedgewars\Data\)

 */

flib_netconn *flib_netconn_create(const char *playerName, flib_metascheme *metacfg, const char *dataDirPath, const char *host, int port);

void flib_netconn_destroy(flib_netconn *conn);

/**

 * Perform I/O operations and call callbacks if something interesting happens.

 * Should be called regularly.

 */

void flib_netconn_tick(flib_netconn *conn);

/**

 * Are you currently the owner of this room? The return value only makes sense in

 * NETCONN_STATE_ROOM and NETCONN_STATE_INGAME states.

 */

bool flib_netconn_is_chief(flib_netconn *conn);

/**

 * Are you in the context of a room, i.e. either in room or ingame state?

 */

bool flib_netconn_is_in_room_context(flib_netconn *conn);

/**

 * Generate a game setup from the current room state.

 * Returns NULL if the room state does not contain enough information

 * for a complete game setup, or if an error occurs.

 *

 * The new gamesetup must be destroyed with flib_gamesetup_destroy().

 */

flib_gamesetup *flib_netconn_create_gamesetup(flib_netconn *conn);

/**

 * quitmsg may be null

 */

int flib_netconn_send_quit(flib_netconn *conn, const char *quitmsg);

int flib_netconn_send_chat(flib_netconn *conn, const char *chat);

/**

 * Send a teamchat message, forwarded from the engine. Only makes sense ingame.

 * The server does not send a reply. In contrast to a Chat message, the server

 * automatically converts this into an engine message and passes it on to the other

 * clients.

 */

int flib_netconn_send_teamchat(flib_netconn *conn, const char *msg);

/**

 * Send the password in reply to a password request.

 */

int flib_netconn_send_password(flib_netconn *conn, const char *passwd);

/**

 * Request a different nickname.

 * This function only makes sense in reaction to an onNickTaken callback, because the netconn automatically

 * requests the nickname you provide on creation, and once the server accepts the nickname it can no longer

 * be changed.

 */

int flib_netconn_send_nick(flib_netconn *conn, const char *nick);

/**

 * Join a room as guest (not chief). Only makes sense when in lobby state. If the action succeeds, you will

 * receive an onEnterRoom callback with chief=false.

 */

int flib_netconn_send_joinRoom(flib_netconn *conn, const char *room);

/**

 * Create and join a new room. Only makes sense when in lobby state. If the action succeeds, you will

 * receive an onEnterRoom callback with chief=true.

 */

int flib_netconn_send_createRoom(flib_netconn *conn, const char *room);

/**

 * Rename the current room. Only makes sense in room state and if you are chief. If the action succeeds, you will

 * receive an onRoomUpdate callback containing the change.

 */

int flib_netconn_send_renameRoom(flib_netconn *conn, const char *roomName);

/**

 * Leave the room for the lobby. Only makes sense in room state. msg can be NULL if you don't want to

 * send a message. The server always accepts a part message, so once you send it off, you can just

 * assume that you are back in the lobby.

 */

int flib_netconn_send_leaveRoom(flib_netconn *conn, const char *msg);

/**

 * Change your "ready" status in the room. Only makes sense when in room state. If the action succeeds, you will

 * receive an onReadyState callback containing the change.

 */

int flib_netconn_send_toggleReady(flib_netconn *conn);

/**

 * Add a team to the current room. The message includes the team color, but not

 * the number of hogs. Only makes sense when in room state. If the action succeeds, you will

 * receive an onTeamAccepted callback with the name of the team.

 */

int flib_netconn_send_addTeam(flib_netconn *conn, const flib_team *team);

/**

 * Remove the team with the name teamname. Only makes sense when in room state.

 * The server does not send a reply on success.

 */

int flib_netconn_send_removeTeam(flib_netconn *conn, const char *teamname);

/**

 * Send an engine message. Only makes sense when ingame. In a networked game, you have to

 * pass all the engine messages from the engine here, and they will be spread to all other

 * clients in the game to keep the game in sync.

 */

int flib_netconn_send_engineMessage(flib_netconn *conn, const uint8_t *message, size_t size);

/**

 * Set the number of hogs for a team. Only makes sense in room state and if you are chief.

 * The server does not send a reply.

 */

int flib_netconn_send_teamHogCount(flib_netconn *conn, const char *teamname, int hogcount);

/**

 * Set the teamcolor of a team. Only makes sense in room state and if you are chief.

 * The server does not send a reply.

 */

int flib_netconn_send_teamColor(flib_netconn *conn, const char *teamname, int colorIndex);

/**

 * Set the weaponset for the room. Only makes sense in room state and if you are chief.

 * The server does not send a reply.

 */

int flib_netconn_send_weaponset(flib_netconn *conn, const flib_weaponset *weaponset);

/**

 * Set the map for the room. Only makes sense in room state and if you are chief.

 * The server does not send a reply.

 */

int flib_netconn_send_map(flib_netconn *conn, const flib_map *map);

/**

 * Set the mapname. Only makes sense in room state and if you are chief.

 * The server does not send a reply.

 */

int flib_netconn_send_mapName(flib_netconn *conn, const char *mapName);

/**

 * Set the map generator. Only makes sense in room state and if you are chief.

 * The server does not send a reply.

 */

int flib_netconn_send_mapGen(flib_netconn *conn, int mapGen);

/**

 * Set the map template for regular maps. Only makes sense in room state and if you are chief.

 * The server does not send a reply.

 */

int flib_netconn_send_mapTemplate(flib_netconn *conn, int templateFilter);

/**

 * Set the maze template (maze size) for mazes. Only makes sense in room state and if you are chief.

 * The server does not send a reply.

 */

int flib_netconn_send_mapMazeSize(flib_netconn *conn, int mazeSize);

/**

 * Set the seed for the map. Only makes sense in room state and if you are chief.

 * The server does not send a reply.

 */

int flib_netconn_send_mapSeed(flib_netconn *conn, const char *seed);

/**

 * Set the theme for the map. Only makes sense in room state and if you are chief.

 * The server does not send a reply.

 */

int flib_netconn_send_mapTheme(flib_netconn *conn, const char *theme);

/**

 * Set the draw data for the drawn map. Only makes sense in room state and if you are chief.

 * The server does not send a reply.

 */

int flib_netconn_send_mapDrawdata(flib_netconn *conn, const uint8_t *drawData, size_t size);

/**

 * Set the script (game style). Only makes sense in room state and if you are chief.

 * The server does not send a reply.

 */

int flib_netconn_send_script(flib_netconn *conn, const char *scriptName);

/**

 * Set the scheme. Only makes sense in room state and if you are chief.

 * The server does not send a reply.

 */

int flib_netconn_send_scheme(flib_netconn *conn, const flib_scheme *scheme);

/**

 * Inform the server that the round has ended. Call this when the engine

 * has disconnected, passing 1 if the round ended normally, 0 otherwise.

 */

int flib_netconn_send_roundfinished(flib_netconn *conn, bool withoutError);

/**

 * Ban a player. TODO: Figure out details

 */

int flib_netconn_send_ban(flib_netconn *conn, const char *playerName);

/**

 * Kick a player. TODO: Figure out details

 */

int flib_netconn_send_kick(flib_netconn *conn, const char *playerName);

/**

 * Request information about a player. If the action succeeds, you will

 * receive an onMessage callback with NETCONN_MSG_TYPE_PLAYERINFO containing

 * the requested information.

 */

int flib_netconn_send_playerInfo(flib_netconn *conn, const char *playerName);

/**

 * Follow a player. TODO figure out details

 */

int flib_netconn_send_playerFollow(flib_netconn *conn, const char *playerName);

/**

 * Signal that you want to start the game. Only makes sense in room state and if you are chief.

 * TODO details

 */

int flib_netconn_send_startGame(flib_netconn *conn);

/**

 * Allow/forbid players to join the room. Only makes sense in room state and if you are chief.

 * The server does not send a reply.

 */

int flib_netconn_send_toggleRestrictJoins(flib_netconn *conn);

/**

 * Allow/forbid adding teams to the room. Only makes sense in room state and if you are chief.

 * The server does not send a reply.

 */

int flib_netconn_send_toggleRestrictTeams(flib_netconn *conn);

/**

 * Probably does something administrator-y.

 */

int flib_netconn_send_clearAccountsCache(flib_netconn *conn);

/**

 * Sets a server variable to the indicated value. Only makes sense if you are server admin.

 * Known variables are MOTD_NEW, MOTD_OLD and LATEST_PROTO.

 * TODO reply?

 */

int flib_netconn_send_setServerVar(flib_netconn *conn, const char *name, const char *value);

/**

 * Queries all server variables. Only makes sense if you are server admin. (TODO: try)

 * If the action succeeds, you will receive several onServerVar callbacks with the

 * current values of all server variables.

 */

int flib_netconn_send_getServerVars(flib_netconn *conn);

/**

 * Callback for several informational messages that should be displayed to the user

 * (e.g. in the chat window), but do not require a reaction. If a game is running, you might

 * want to redirect some of these messages to the engine as well so the user will see them.

 */

void flib_netconn_onMessage(flib_netconn *conn, void (*callback)(void *context, int msgtype, const char *msg), void* context);

/**

 * We received a chat message. Where this message belongs depends on the current state (lobby/room/game). In particular,

 * if a game is running the message should be passed to the engine.

 */

void flib_netconn_onChat(flib_netconn *conn, void (*callback)(void *context, const char *nick, const char *msg), void* context);

/**

 * This is called when we receive a CONNECTED message from the server, which should be the first

 * message arriving from the server.

 */

void flib_netconn_onConnected(flib_netconn *conn, void (*callback)(void *context), void* context);

/**

 * This is *always* the last callback (unless the netconn is destroyed early), and the netconn should be destroyed when it is received.

 * The reason is one of the NETCONN_DISCONNECT_ constants. Sometime a message is included as well, but that parameter might

 * also be NULL.

 */

void flib_netconn_onDisconnected(flib_netconn *conn, void (*callback)(void *context, int reason, const char *message), void* context);

/**

 */

void flib_netconn_onRoomAdd(flib_netconn *conn, void (*callback)(void *context, const flib_room *room), void* context);

void flib_netconn_onRoomDelete(flib_netconn *conn, void (*callback)(void *context, const char *name), void* context);

void flib_netconn_onRoomUpdate(flib_netconn *conn, void (*callback)(void *context, const char *oldName, const flib_room *room), void* context);

/**

 * Callbacks for players joining or leaving the lobby. If join is true it's a join, otherwise a leave.

 * NOTE: partMessage is null if no parting message was given.

 */

void flib_netconn_onLobbyJoin(flib_netconn *conn, void (*callback)(void *context, const char *nick), void* context);

void flib_netconn_onLobbyLeave(flib_netconn *conn, void (*callback)(void *context, const char *nick, const char *partMessage), void* context);

/**

 * onNickTaken is called on connecting to the server, if it turns out that there is already a player with the same nick.

 * In order to proceed, a new nickname needs to be sent to the server using flib_netconn_send_nick() (or of course you can

 * bail out and send a QUIT). If you don't set a callback, the netconn will automatically react by generating a new name.

 * Once the server accepts a name, you will be informed with an onNickAccept callback.

 */

void flib_netconn_onNickTaken(flib_netconn *conn, void (*callback)(void *context, const char *nick), void* context);

/**

 * When connecting with a registered nickname, the server will ask for a password before admitting you in.

 * This callback is called when that happens. As a reaction, you can send the password using

 * flib_netconn_send_password or choose a different nick. If you don't register a callback,

 * the default behavior is to just quit in a way that will cause a disconnect with NETCONN_DISCONNECT_AUTH_FAILED.

 */

void flib_netconn_onPasswordRequest(flib_netconn *conn, void (*callback)(void *context, const char *nick), void* context);

/**

 * You just left the lobby and entered a room.

 * If chief is true, you can and should send a full configuration for the room now.

 * This consists of ammo, scheme, script and map, where map apparently has to come last.

 */

void flib_netconn_onEnterRoom(flib_netconn *conn, void (*callback)(void *context, bool chief), void *context);

/**

 * The following callbacks are only relevant in room state.

 */

/**

 * This callback informs about changes to your room chief status, i.e. whether you are allowed to

 * modify the current room. Generally when you create a room you start out being room chief, and

 * when you join an existing room you are not. However, in some situations room ownership can change,

 * and if that happens this callback is called with the new status.

 *

 * Note: This callback does not automatically fire when joining a room. You can always query the

 * current chief status using flib_netconn_is_chief().

 */

void flib_netconn_onRoomChiefStatus(flib_netconn *conn, void (*callback)(void *context, bool chief), void* context);

/**

 * One of the players in the room (possibly you!) changed their ready state.

 */

void flib_netconn_onReadyState(flib_netconn *conn, void (*callback)(void *context, const char *nick, bool ready), void* context);

/**

 * You just left a room and entered the lobby again.

 * reason is one of the NETCONN_ROOMLEAVE_ constants.

 * This will not be called when you actively leave a room using PART.

 */

void flib_netconn_onLeaveRoom(flib_netconn *conn, void (*callback)(void *context, int reason, const char *message), void *context);

/**

 * A new team was added to the room. The person who adds a team does NOT receive this callback (he gets onTeamAccepted instead).

 * The team does not contain bindings, stats, weaponset, color or the number of hogs.

 */

void flib_netconn_onTeamAdd(flib_netconn *conn, void (*callback)(void *context, const flib_team *team), void *context);

/**

 * A team was removed from the room.

 */

void flib_netconn_onTeamDelete(flib_netconn *conn, void (*callback)(void *context, const char *teamname), void *context);

void flib_netconn_onRoomJoin(flib_netconn *conn, void (*callback)(void *context, const char *nick), void* context);

void flib_netconn_onRoomLeave(flib_netconn *conn, void (*callback)(void *context, const char *nick, const char *partMessage), void* context);

/**

 * The game is starting. Fire up the engine and join in!

 * You can let the netconn generate the right game setup using flib_netconn_create_gamesetup

 */

void flib_netconn_onRunGame(flib_netconn *conn, void (*callback)(void *context), void *context);

/**

 * When you ask for a team to be added, the server might reject it for several reasons, e.g. because it has the same name

 * as an existing team, or because the room chief restricted adding new teams. If the team is accepted by the server,

 * this callback is fired.

 */

void flib_netconn_onTeamAccepted(flib_netconn *conn, void (*callback)(void *context, const char *teamName), void *context);

/**

 * The number of hogs in a team has been changed by the room chief. If you are the chief and change the number of hogs yourself,

 * you will not receive this callback!

 */

void flib_netconn_onHogCountChanged(flib_netconn *conn, void (*callback)(void *context, const char *teamName, int hogs), void *context);

/**

 * The color of a team has been changed by the room chief. If you are the chief and change the color yourself,

 * you will not receive this callback!

 */

void flib_netconn_onTeamColorChanged(flib_netconn *conn, void (*callback)(void *context, const char *teamName, int colorIndex), void *context);

void flib_netconn_onEngineMessage(flib_netconn *conn, void (*callback)(void *context, const uint8_t *message, size_t size), void *context);

void flib_netconn_onCfgScheme(flib_netconn *conn, void (*callback)(void *context, const flib_scheme *scheme), void *context);

/**

 * This is called when the map configuration in a room is changed (or first received). Only non-chiefs receive these messages.

 * To reduce the number of callback functions, the netconn keeps track of the current map settings and always passes the entire

 * current map config, but informs the callee about what has changed (see the NETCONN_MAPCHANGE_ constants).

 * The map parameter passed to the callback is an internally held map config. If you want to keep it around, best make a copy

 * or it may or may not change while you are not looking.

 *

 * Caution: Due to the way the protocol works, the map might not be complete at this point if it is a hand-drawn map, because

 * the "full" map config does not include the drawn map data.

 */

void flib_netconn_onMapChanged(flib_netconn *conn, void (*callback)(void *context, const flib_map *map, int changetype), void *context);

/**

 * The "game style" script has been changed by the room chief. If you are the chief and change the script yourself,

 * you will not receive this callback!