g_client.cpp

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/*
Copyright (C) 2002-2022 UFO: Alien Invasion.

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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

#include "g_client.h"
#include "g_actor.h"
#include "g_ai.h"
#include "g_combat.h"
#include "g_edicts.h"
#include "g_inventory.h"
#include "g_match.h"
#include "g_move.h"
#include "g_reaction.h"
#include "g_utils.h"
#include "g_vis.h"

static chrScoreMission_t scoreMission[MAX_EDICTS];
static int scoreMissionNum = 0;

Player* G_PlayerGetNextHuman (Player* lastPlayer)
{
    if (!game.sv_maxplayersperteam)
        return nullptr;

    if (!lastPlayer)
        return game.players;

    const Player* endOfPlayers = &game.players[game.sv_maxplayersperteam];

    assert(lastPlayer >= game.players);
    assert(lastPlayer < endOfPlayers);

    Player* player = lastPlayer;

    player++;
    if (player >= endOfPlayers)
        return nullptr;
    else
        return player;
}

Player* G_PlayerGetNextAI (Player* lastPlayer)
{
    if (!game.sv_maxplayersperteam)
        return nullptr;

    if (!lastPlayer)
        return &game.players[game.sv_maxplayersperteam];

    const Player* endOfPlayers = &game.players[game.sv_maxplayersperteam * 2];  /* two teams */

    assert(lastPlayer >= &game.players[game.sv_maxplayersperteam]); /* AI players are in the upper half of the players array */
    assert(lastPlayer < endOfPlayers);

    Player* player = lastPlayer;

    player++;
    if (player >= endOfPlayers)
        return nullptr;
    else
        return player;
}

Player* G_PlayerGetNextActiveHuman (Player* lastPlayer)
{
    Player* player = lastPlayer;

    while ((player = G_PlayerGetNextHuman(player))) {
        if (player->isInUse())
            return player;
    }

    return nullptr;
}

Player* G_PlayerGetNextActiveAI (Player* lastPlayer)
{
    Player* player = lastPlayer;

    while ((player = G_PlayerGetNextAI(player))) {
        if (player->isInUse())
            return player;
    }

    return nullptr;
}

playermask_t G_TeamToPM (int team)
{
    playermask_t playerMask = 0;
    Player* p = nullptr;

    /* don't handle the ai players, here */
    while ((p = G_PlayerGetNextHuman(p))) {
        if (p->isInUse() && team == p->getTeam())
            playerMask |= G_PlayerToPM(*p);
    }

    return playerMask;
}

teammask_t G_PMToVis (playermask_t playerMask)
{
    teammask_t teamMask = 0;
    Player* p = nullptr;

    /* don't handle the ai players, here */
    while ((p = G_PlayerGetNextActiveHuman(p))) {
        if (playerMask & G_PlayerToPM(*p))
            teamMask |= G_TeamToVisMask(p->getTeam());
    }

    return teamMask;
}

playermask_t G_VisToPM (teammask_t teamMask)
{
    playermask_t playerMask = 0;
    Player* p = nullptr;

    /* don't handle the ai players, here */
    while ((p = G_PlayerGetNextActiveHuman(p))) {
        if (teamMask & G_TeamToVisMask(p->getTeam()))
            playerMask |= G_PlayerToPM(*p);
    }

    return playerMask;
}

void G_ClientPrintf (const Player& player, int printLevel, const char* fmt, ...)
{
    /* there is no client for an AI controlled player on the server where we
     * could send the message to */
    if (G_IsAIPlayer(&player))
        return;

    va_list ap;
    va_start(ap, fmt);
    gi.PlayerPrintf(&player, printLevel, fmt, ap);
    va_end(ap);
}

void G_GiveTimeUnits (int team)
{
    Actor* actor = nullptr;

    while ((actor = G_EdictsGetNextLivingActorOfTeam(actor, team))) {
        G_ActorGiveTimeUnits(actor);
        G_SendStats(*actor);
    }
}

void G_AppearPerishEvent (playermask_t playerMask, bool appear, Edict& check, const Edict* ent)
{
    /* test for pointless player mask */
    if (!playerMask)
        return;

    const teammask_t teamMaskDiff = G_PMToVis(playerMask);
    G_VisFlagsSwap(check, teamMaskDiff);

    if (appear) {
        /* appear */
        switch (check.type) {
        case ET_ACTOR:
        case ET_ACTOR2x2: {
            Actor* actor = makeActor(&check);
            G_EventActorAppear(playerMask, *actor, ent);
            break;
        }

        case ET_CAMERA:
            G_EventCameraAppear(playerMask, check);
            break;

        case ET_ITEM:
            G_EventEdictAppear(playerMask, check);
            G_SendInventory(playerMask, check);
            break;

        case ET_PARTICLE:
            G_EventEdictAppear(playerMask, check);
            G_EventSendParticle(playerMask, check);
            break;

        case ET_TRIGGER_RESCUE:
            G_EventAddBrushModel(playerMask, check);
            break;

        default:
            if (G_IsVisibleOnBattlefield(&check))
                gi.Error("Missing edict type %i in G_AppearPerishEvent", check.type);
            break;
        }
    } else if (G_IsVisibleOnBattlefield(&check)) {
        G_EventEdictPerish(playerMask, check);
    }
}

void G_SendInvisible (const Player& player)
{
    const int team = player.getTeam();

    assert(team != TEAM_NO_ACTIVE);
    if (!level.num_alive[team])
        return;

    Actor* actor = nullptr;
    /* check visibility */
    while ((actor = G_EdictsGetNextActor(actor))) {
        if (actor->getTeam() == team)
            continue;
        /* not visible for this team - so add the le only */
        if (!G_IsVisibleForTeam(actor, team)) {
            G_EventActorAdd(G_PlayerToPM(player), *actor);
        }
    }
}

int G_GetActiveTeam (void)
{
    return level.activeTeam;
}

static bool G_ActionCheck (const Player& player, Edict* ent)
{
    if (!ent || !ent->inuse) {
        G_ClientPrintf(player, PRINT_HUD, _("Can't perform action - object not present!"));
        return false;
    }

    if (!G_IsActor(ent)) {
        G_ClientPrintf(player, PRINT_HUD, _("Can't perform action - not an actor!"));
        return false;
    }

    if (G_IsStunned(ent)) {
        G_ClientPrintf(player, PRINT_HUD, _("Can't perform action - actor is stunned!"));
        return false;
    }

    if (G_IsDead(ent)) {
        G_ClientPrintf(player, PRINT_HUD, _("Can't perform action - actor is dead!"));
        return false;
    }

    if (ent->getTeam() != player.getTeam()) {
        G_ClientPrintf(player, PRINT_HUD, _("Can't perform action - not on same team!"));
        return false;
    }

    if (ent->getPlayerNum() != player.getNum()) {
        G_ClientPrintf(player, PRINT_HUD, _("Can't perform action - no control over allied actors!"));
        return false;
    }

    /* could be possible */
    return true;
}

bool G_ActionCheckForCurrentTeam (const Player& player, Actor* ent, int TU)
{
    /* a generic tester if an action could be possible */
    if (level.activeTeam != player.getTeam()) {
        G_ClientPrintf(player, PRINT_HUD, _("Can't perform action - it is not your turn!"));
        return false;
    }

    if (TU > G_ActorUsableTUs(ent)) {
        return false;
    }

    return G_ActionCheck(player, ent);
}

bool G_ActionCheckForReaction (const Player& player, Actor* actor, int TU)
{
    if (TU > actor->getTus()) {
        return false;
    }

    return G_ActionCheck(player, actor);
}

static void G_ClientTurn (Player& player, Actor* actor, dvec_t dvec)
{
    /* check if action is possible */
    if (!G_ActionCheckForCurrentTeam(player, actor, TU_TURN))
        return;

    /* check if we're already facing that direction */
    const int dir = getDVdir(dvec);
    if (actor->dir == dir)
        return;

    /* do the turn */
    G_ActorDoTurn(actor, dir);
    G_ActorUseTU(actor, TU_TURN);

    /* send the turn */
    G_EventActorTurn(*actor);

    /* send the new TUs */
    G_SendStats(*actor);

    /* end the event */
    G_EventEnd();
}

static void G_ClientStateChangeUpdate (Edict& ent)
{
    /* Send the state change. */
    G_EventSendState(G_VisToPM(ent.visflags), ent);

    /* Check if the player appears/perishes, seen from other teams. */
    G_CheckVis(&ent);

    /* Calc new vis for this player. */
    G_CheckVisTeamAll(ent.getTeam(), 0, &ent);

    /* Send the new TUs. */
    G_SendStats(ent);

    /* End the event. */
    G_EventEnd();
}

void G_ClientStateChange (const Player& player, Actor* actor, int reqState, bool checkaction)
{
    /* Check if any action is possible. */
    if (checkaction && !G_ActionCheckForCurrentTeam(player, actor, 0))
        return;

    if (!reqState)
        return;

    switch (reqState) {
    case STATE_CROUCHED: /* Toggle between crouch/stand. */
        /* Check if player has enough TUs (TU_CROUCH TUs for crouch/uncrouch). */
        if (!checkaction || G_ActionCheckForCurrentTeam(player, actor, TU_CROUCH)) {
            if (actor->isCrouched()) {
                if (!gi.CanActorStandHere(actor->fieldSize, actor->pos))
                    break;
            }
            G_ToggleCrouched(actor);
            G_ActorUseTU(actor, TU_CROUCH);
            G_ActorSetMaxs(actor);
        }
        break;
    case ~STATE_REACTION: /* Request to turn off reaction fire. */
        if (actor->isReaction()) {
            if (actor->isShaken() && G_ReactionFireSettingsReserveTUs(actor)) {
                G_ClientPrintf(player, PRINT_HUD, _("Currently shaken, won't let their guard down."));
            } else {
                /* Turn off reaction fire. */
                actor->removeReaction();
                G_ActorReserveTUs(actor, 0, actor->chr.reservedTus.shot, actor->chr.reservedTus.crouch);
                if (!G_IsAI(actor))
                    G_EventReactionFireChange(*actor);
            }
        }
        break;
    /* Request to turn on multi- or single-reaction fire mode. */
    case STATE_REACTION:
        /* Disable reaction fire. */
        actor->removeReaction();

        if (G_ReactionFireSettingsReserveTUs(actor)) {
            /* Enable requested reaction fire. */
            G_SetState(actor, reqState);
        }
        if (!G_IsAI(actor))
            G_EventReactionFireChange(*actor);
        break;
    default:
        gi.DPrintf("G_ClientStateChange: unknown request %i, ignoring\n", reqState);
        return;
    }

    /* Only activate the events - network stuff is handled in the calling function */
    if (!checkaction)
        return;

    G_ClientStateChangeUpdate(*actor);
}

bool G_ClientCanReload (Actor* actor, containerIndex_t containerID)
{
    const objDef_t* weapon;

    if (actor->getContainer(containerID)) {
        weapon = actor->getContainer(containerID)->def();
    } else if (containerID == CID_LEFT && actor->getRightHandItem()->isHeldTwoHanded()) {
        /* Check for two-handed weapon */
        weapon = actor->getRightHandItem()->def();
    } else
        return false;

    assert(weapon);

    /* also try the temp containers */
    const Container* cont = nullptr;
    while ((cont = actor->chr.inv.getNextCont(cont, true))) {
        Item* item = nullptr;
        while ((item = cont->getNextItem(item))) {
            if (item->def()->isLoadableInWeapon(weapon))
                return true;
        }
    }
    return false;
}

bool G_ClientGetWeaponFromInventory (Actor* actor)
{
    /* e.g. bloodspiders are not allowed to carry or collect weapons */
    if (!actor->chr.teamDef->weapons)
        return false;

    /* search for weapons and select the one that is available easily */
    const invDef_t* bestContainer = nullptr;
    Item* theWeapon = nullptr;
    int tu = 100;
    const Container* cont = nullptr;
    while ((cont = actor->chr.inv.getNextCont(cont, true))) {
        if (cont->def()->out >= tu)
            continue;
        Item* item = nullptr;
        while ((item = cont->getNextItem(item))) {
            /* We are looking for the *fastest* way to get a weapon,
             * no matter what kind of weapon it is. */
            assert(item->def());
            if (item->isWeapon() && !item->mustReload()) {
                theWeapon = item;
                bestContainer = cont->def();
                tu = bestContainer->out;
                break;
            }
        }
    }

    /* send request */
    const invDef_t* invDef = INVDEF(CID_RIGHT);
    if (bestContainer) {
        return G_ActorInvMove(actor, bestContainer, theWeapon, invDef, 0, 0, true);
    }
    return false;   /* no weapon found */
}

bool G_ClientUseEdict (const Player& player, Actor* actor, Edict* edict)
{
    /* check whether the actor has sufficient TUs to 'use' this edicts */
    if (!G_ActionCheckForCurrentTeam(player, actor, edict->TU))
        return false;

    if (!G_UseEdict(edict, actor))
        return false;

    /* using a group of edicts only costs TUs once (for the master) */
    G_ActorUseTU(actor, edict->TU);
    /* send the new TUs */
    G_SendStats(*actor);

    G_EventEnd();

    return true;
}

int G_ClientAction (Player& player)
{
    pos3_t pos;
    int i;
    int from;

    /* read the header */
    player_action_t action = (player_action_t)gi.ReadByte();
    int num = gi.ReadShort();

    Edict* ent = G_EdictsGetByNum(num);
    if (ent == nullptr)
        return action;

    /* we expext this ent to be an Actor */
    Actor* actor = makeActor(ent);

    const char* format = pa_format[action];

    switch (action) {
    case PA_NULL:
        /* do nothing on a null action */
        break;

    case PA_TURN:
        gi.ReadFormat(format, &i);
        G_ClientTurn(player, actor, (dvec_t) i);
        break;

    case PA_MOVE:
        gi.ReadFormat(format, &pos);
        G_ClientMove(player, player.getTeam(), actor, pos);
        break;

    case PA_STATE:
        gi.ReadFormat(format, &i);
        G_ClientStateChange(player, actor, i, true);
        break;

    case PA_SHOOT:
        fireDefIndex_t firemode;
        gi.ReadFormat(format, &pos, &i, &firemode, &from);
        G_ClientShoot(player, actor, pos, i, firemode, nullptr, true, from);
        break;

    case PA_INVMOVE:
        int fx, fy, to, tx, ty;
        gi.ReadFormat(format, &from, &fx, &fy, &to, &tx, &ty);

        if (!isValidContId(from) || !isValidContId(to)) {
            gi.DPrintf("G_ClientAction: PA_INVMOVE Container index out of range. (from: %i, to: %i)\n", from, to);
        } else {
            const invDef_t* fromPtr = INVDEF(from);
            const invDef_t* toPtr = INVDEF(to);
            Item* fromItem = ent->chr.inv.getItemAtPos(fromPtr, fx, fy);
            if (fromItem)
                G_ActorInvMove(actor, fromPtr, fromItem, toPtr, tx, ty, true);
        }
        break;

    case PA_USE:
        if (actor->clientAction) {
            /* read the door the client wants to open */
            gi.ReadFormat(format, &i);

            /* get the door edict */
            Edict* actionEnt = G_EdictsGetByNum(i);

            /* maybe the door is no longer 'alive' because it was destroyed */
            if (actionEnt && actor->clientAction == actionEnt) {
                if (G_IsDoor(actionEnt)) {
                    G_ActorUseDoor(actor, actionEnt);
                }
            }
        }
        break;

    case PA_REACT_SELECT:
        actorHands_t hand;
        int fmIdx, objIdx;
        gi.ReadFormat(format, &hand, &fmIdx, &objIdx);
        G_ReactionFireSettingsUpdate(actor, fmIdx, hand, INVSH_GetItemByIDX(objIdx));
        break;

    case PA_RESERVE_STATE:
        int resCrouch, resShot;
        gi.ReadFormat(format, &resShot, &resCrouch);

        G_ActorReserveTUs(ent, ent->chr.reservedTus.reaction, resShot, resCrouch);
        break;

    default:
        gi.Error("G_ClientAction: Unknown action!\n");
    }
    return action;
}

static void G_GetTeam (Player& player)
{
    /* player has already a team */
    if (player.getTeam() > 0) {
        Com_DPrintf(DEBUG_GAME, "Player %s is already on team %i\n", player.pers.netname, player.getTeam());
        return;
    }

    /* number of currently connected players (no ai players) */
    int playersInGame = 0;
    Player* p = nullptr;
    while ((p = G_PlayerGetNextActiveHuman(p)))
        playersInGame++;

    const int maxTeam = std::min(sv_maxteams->integer, TEAM_MAX_HUMAN);
    /* randomly assign a teamnumber in deathmatch games */
    if (playersInGame <= 1 && G_IsMultiPlayer() && !sv_teamplay->integer) {
        int spawnCheck[MAX_TEAMS];
        int spawnSpots = 0;
        /* skip civilian teams */
        for (int i = TEAM_PHALANX; i <= maxTeam; i++) {
            spawnCheck[i] = 0;
            /* check whether there are spawnpoints for this team */
            if (level.num_spawnpoints[i])
                spawnCheck[spawnSpots++] = i;
        }
        /* we need at least 2 different team spawnpoints for multiplayer in a death match game */
        if (spawnSpots < 2)
            gi.Error("G_GetTeam: Not enough spawn spots in map!");

        /* assign random valid team number */
        int i = spawnSpots;
        int randomSpot = rand() % spawnSpots;
        for (;;) {
            const int team = spawnCheck[randomSpot];
            if (i == 0)
                gi.Error("G_GetTeam: Could not assign a team!");
            if (G_SetTeamForPlayer(player, team)) {
                gi.DPrintf("%s has been randomly assigned to team %i\n",
                        player.pers.netname, G_ClientGetTeamNum(player));
                break;
            }
            i--;
            randomSpot = (randomSpot + 1) % spawnSpots;
        }
        return;
    }

    /* find a team */
    if (G_IsSinglePlayer()) {
        G_SetTeamForPlayer(player, TEAM_PHALANX);
    } else if (sv_teamplay->integer) {
        /* set the team specified in the userinfo */
        const int i = G_ClientGetTeamNumPref(player);
        gi.DPrintf("Get a team for teamplay for %s\n", player.pers.netname);
        /* civilians are at team zero */
        if (i > TEAM_CIVILIAN && sv_maxteams->integer >= i) {
            G_SetTeamForPlayer(player, i);
            gi.BroadcastPrintf(PRINT_CONSOLE, "serverconsole: %s has chosen team %i\n", player.pers.netname, i);
        } else {
            gi.DPrintf("Team %i is not valid - choose a team between 1 and %i\n", i, sv_maxteams->integer);
            G_SetTeamForPlayer(player, TEAM_DEFAULT);
        }
    } else {
        int i;
        /* search team */
        gi.DPrintf("Getting a multiplayer team for %s\n", player.pers.netname);
        for (i = TEAM_CIVILIAN + 1; i <= maxTeam; i++) {
            if (level.num_spawnpoints[i]) {
                bool teamAvailable = true;

                p = nullptr;
                /* check if team is in use (only human controlled players) */
                while ((p = G_PlayerGetNextActiveHuman(p))) {
                    if (p->getTeam() == i) {
                        Com_DPrintf(DEBUG_GAME, "Team %i is already in use\n", i);
                        /* team already in use */
                        teamAvailable = false;
                        break;
                    }
                }
                if (teamAvailable)
                    break;
            }
        }

        /* set the team */
        if (i <= maxTeam) {
            /* remove ai player */
            p = nullptr;
            while ((p = G_PlayerGetNextActiveAI(p))) {
                if (p->getTeam() == i) {
                    gi.BroadcastPrintf(PRINT_CONSOLE, "Removing ai player...");
                    p->setInUse(false);
                    break;
                }
            }
            Com_DPrintf(DEBUG_GAME, "Assigning %s to team %i\n", player.pers.netname, i);
            G_SetTeamForPlayer(player, i);
        } else {
            gi.DPrintf("No free team - disconnecting '%s'\n", player.pers.netname);
            G_ClientDisconnect(player);
        }
    }
}

bool G_SetTeamForPlayer (Player& player, const int team)
{
    assert(team >= TEAM_NO_ACTIVE && team < MAX_TEAMS);

    if (G_IsAIPlayer(&player)) {
        if (team != TEAM_ALIEN && team != TEAM_CIVILIAN)
            return false;
    } else {
        if (!sv_teamplay->integer) {
            Player* p = nullptr;
            while ((p = G_PlayerGetNextHuman(p)) != nullptr) {
                if (p->getTeam() == team)
                    return false;
            }
        }
    }

    player.setTeam(team);

    /* if we started in dev mode, we maybe don't have a
     * starting position in this map */
    if (!g_nospawn->integer) {
        if (team >= 0 && team < MAX_TEAMS) {
            if (!level.num_spawnpoints[team])
                gi.Error("No spawnpoints for team %i", team);
        }
    }

    if (!G_IsAIPlayer(&player))
        Info_SetValueForKeyAsInteger(player.pers.userinfo, sizeof(player.pers.userinfo), "cl_team", team);

    return true;
}

int G_ClientGetTeamNum (const Player& player)
{
    return player.getTeam();
}

int G_ClientGetTeamNumPref (const Player& player)
{
    return Info_IntegerForKey(player.pers.userinfo, "cl_teamnum");
}

bool G_ClientIsReady (const Player* player)
{
    assert(player);
    return player->isReady();
}

static void G_GetStartingTeam (const Player& player)
{
    /* return with no action if activeTeam already assigned or if are in single-player mode */
    if (G_MatchIsRunning())
        return;

    if (G_IsSinglePlayer()) {
        level.activeTeam = player.getTeam();
        level.teamOfs = MAX_TEAMS - level.activeTeam;
        return;
    }

    /* count number of currently connected unique teams and players (human controlled players only) */
    int knownTeams[MAX_TEAMS];
    Player* p = nullptr;
    int teamCount = 0;
    int playerCount = 0;
    while ((p = G_PlayerGetNextActiveHuman(p))) {
        int j;
        playerCount++;
        for (j = 0; j < teamCount; j++) {
            if (p->getTeam() == knownTeams[j])
                break;
        }
        if (j == teamCount)
            knownTeams[teamCount++] = p->getTeam();
    }

    if (teamCount) {
        const int teamIndex = (int) (frand() * (teamCount - 1) + 0.5);
        G_PrintStats("Starting new game: %s with %i teams", level.mapname, teamCount);
        level.activeTeam = knownTeams[teamIndex];
        level.teamOfs = MAX_TEAMS - level.activeTeam;
        p = nullptr;
        while ((p = G_PlayerGetNextActiveHuman(p)))
            if (p->getTeam() != level.activeTeam)
                p->roundDone = true;
    }
}

static Edict* G_ClientGetFreeSpawnPoint (const Player& player, int spawnType)
{
    /* Abort for non-spawnpoints */
    assert(spawnType == ET_ACTORSPAWN || spawnType == ET_ACTOR2x2SPAWN);

    Edict* ent = nullptr;
    if (level.noRandomSpawn) {
        while ((ent = G_EdictsGetNextInUse(ent)))
            if (ent->type == spawnType && player.getTeam() == ent->getTeam()) {
                if (G_EdictsGetLivingActorFromPos(ent->pos))
                    continue;
                return ent;
            }
    } else {
        Edict* list[MAX_EDICTS];
        int count = 0;
        while ((ent = G_EdictsGetNextInUse(ent)))
            if (ent->type == spawnType && player.getTeam() == ent->getTeam()) {
                if (G_EdictsGetLivingActorFromPos(ent->pos))
                    continue;
                list[count++] = ent;
            }

        if (count)
            return list[rand() % count];
    }

    return nullptr;
}

static inline bool G_ActorSpawnIsAllowed (const int num, const int team)
{
    if (G_IsSinglePlayer())
        return true;

    return num < sv_maxsoldiersperplayer->integer && level.num_spawned[team] < sv_maxsoldiersperteam->integer;
}

static void G_ThinkActorDieAfterSpawn (Edict* ent)
{
    /* We can safely assume that this is an Actor */
    Actor* actor = makeActor(ent);
    G_ActorDieOrStun(actor, nullptr);
    actor->think = nullptr;
}

static void G_ThinkActorGoCrouch (Edict* ent)
{
    Actor* actor = makeActor(ent);
    G_ClientStateChange(actor->getPlayer(), actor, STATE_CROUCHED, true);
    actor->think = nullptr;
}

Actor* G_ClientGetFreeSpawnPointForActorSize (const Player& player, const actorSizeEnum_t actorSize)
{
    Edict* ent;

    if (actorSize == ACTOR_SIZE_NORMAL) {
        /* Find valid actor spawn fields for this player. */
        ent = G_ClientGetFreeSpawnPoint(player, ET_ACTORSPAWN);
        if (ent) {
            /* preserve the spawpoint so we can later spawn more (alien rush) */
            Edict* copy = G_EdictDuplicate(ent);
            if (copy != nullptr)
                copy->type = ET_ACTOR;
            ent = copy;
        }
    } else if (actorSize == ACTOR_SIZE_2x2) {
        /* Find valid actor spawn fields for this player. */
        ent = G_ClientGetFreeSpawnPoint(player, ET_ACTOR2x2SPAWN);
        if (ent) {
            Edict* copy = G_EdictDuplicate(ent);
            if (copy != nullptr) {
                copy->type = ET_ACTOR2x2;
                copy->setMorale(100);
            }
            ent = copy;
        }
    } else {
        gi.Error("G_ClientGetFreeSpawnPointForActorSize: unknown fieldSize for actor edict (actorSize: %i)\n", actorSize);
    }

    if (!ent)
        return nullptr;

    level.num_spawned[ent->getTeam()]++;
    ent->setPlayerNum(player.getNum());
    ent->chr.fieldSize = actorSize;
    ent->fieldSize = ent->chr.fieldSize;
    ent->flags |= FL_DESTROYABLE;
    G_VisFlagsReset(*ent);
    gi.LinkEdict(ent);

    if (ent->spawnflags & STATE_CROUCHED) {
        ent->think = G_ThinkActorGoCrouch;
        ent->nextthink = 1;
    }

    if (ent->spawnflags & STATE_STUN) {
        if (ent->spawnflags & STATE_DEAD)
            ent->HP = 0;
        ent->think = G_ThinkActorDieAfterSpawn;
        ent->nextthink = 1;
    }

    G_ActorModifyCounters(nullptr, ent, 1, 0, 0);

    G_ReactionFireTargetsCreate(ent);

    return makeActor(ent);
}

static void G_ClientReadInventory (Edict* ent)
{
    /* inventory */
    for (int nr = gi.ReadShort(); nr > 0; nr--) {
        const invDef_t* container;
        Item item;
        int x, y;
        G_ReadItem(&item, &container, &x, &y);
        if (container->temp)
            gi.Error("G_ClientReadInventory failed, tried to add '%s' to a temp container %i", item.def()->id, container->id);
        /* ignore the overload for now */
        if (!ent->chr.inv.canHoldItemWeight(CID_EQUIP, container->id, item, ent->chr.score.skills[ABILITY_POWER]))
            Com_Printf("G_ClientReadInventory: Item %s exceeds ent %i weight capacity\n", item.def()->id, ent->getIdNum());
        if (!level.noEquipment && game.invi.addToInventory(&ent->chr.inv, &item, container, x, y, 1) == nullptr)
            gi.Error("G_ClientReadInventory failed, could not add item '%s' to container %i (x:%i,y:%i)",
                    item.def()->id, container->id, x, y);
    }
}

static void G_ClientReadCharacter (Edict* ent)
{
    ent->chr.init();
    /* model */
    ent->chr.ucn = gi.ReadShort();
    gi.ReadString(ent->chr.name, sizeof(ent->chr.name));
    gi.ReadString(ent->chr.path, sizeof(ent->chr.path));
    gi.ReadString(ent->chr.body, sizeof(ent->chr.body));
    gi.ReadString(ent->chr.head, sizeof(ent->chr.head));
    ent->chr.bodySkin = gi.ReadByte();
    ent->chr.headSkin = gi.ReadByte();

    ent->chr.HP = gi.ReadShort();
    ent->chr.minHP = ent->chr.HP;
    ent->chr.maxHP = gi.ReadShort();
    const int teamDefIdx = gi.ReadByte();
    if (teamDefIdx < 0 || teamDefIdx >= MAX_TEAMDEFS)
        gi.Error("Invalid team definition index given: %i", teamDefIdx);
    ent->chr.teamDef = &gi.csi->teamDef[teamDefIdx];

    ent->chr.gender = gi.ReadByte();
    ent->chr.STUN = gi.ReadByte();
    ent->chr.morale = gi.ReadByte();

    for (int k = 0; k < ent->chr.teamDef->bodyTemplate->numBodyParts(); ++k)
        ent->chr.wounds.treatmentLevel[k] = gi.ReadByte();

    for (int k = 0; k < SKILL_NUM_TYPES + 1; k++) /* new attributes */
        ent->chr.score.experience[k] = gi.ReadLong();
    for (int k = 0; k < SKILL_NUM_TYPES; k++) /* new attributes */
        ent->chr.score.skills[k] = gi.ReadByte();
    for (int k = 0; k < KILLED_NUM_TYPES; k++)
        ent->chr.score.kills[k] = gi.ReadShort();
    for (int k = 0; k < KILLED_NUM_TYPES; k++)
        ent->chr.score.stuns[k] = gi.ReadShort();
    ent->chr.score.assignedMissions = gi.ReadShort();
}

static void G_ClientSkipActorInfo (void)
{
    Edict ent;
    invDef_t container;
    Item item;
    int x, y;
    const invDef_t* c = &container;

    G_ClientReadCharacter(&ent);

    /* skip inventory */
    const int n = gi.ReadShort();
    for (int i = 0; i < n; i++) {
        G_ReadItem(&item, &c, &x, &y);
    }
}

static void G_ClientAssignDefaultActorValues (Actor* actor)
{
    /* Mission Scores */
    scoreMission[scoreMissionNum].init();
    actor->chr.scoreMission = &scoreMission[scoreMissionNum];
    scoreMissionNum++;

    /* set initial vital statistics */
    actor->HP = actor->chr.HP;
    actor->setMorale(actor->chr.morale);

    actor->setMorale(GET_MORALE(actor->chr.score.skills[ABILITY_MIND]));

    /* set models */
    actor->setBody(gi.ModelIndex(CHRSH_CharGetBody(&actor->chr)));
    actor->setHead(gi.ModelIndex(CHRSH_CharGetHead(&actor->chr)));

    actor->chr.scoreMission->carriedWeight = actor->chr.inv.getWeight();
}

void G_ClientInitActorStates (const Player& player)
{
    const int length = gi.ReadByte(); /* Get the actor amount that the client sent. */

    for (int i = 0; i < length; i++) {
        const int ucn = gi.ReadShort();
        Actor* actor = G_EdictsGetActorByUCN(ucn, player.getTeam());
        if (!actor) {
            gi.DPrintf("Could not find character on team %i with unique character number %i\n", player.getTeam(), ucn);
            /* Skip actor info */
            gi.ReadShort();
            gi.ReadShort();
            gi.ReadShort();
            gi.ReadShort();
            continue;
        }

        /* these state changes are not consuming any TUs */
        const int saveTU = actor->getTus();
        G_ClientStateChange(player, actor, gi.ReadShort(), false);
        const actorHands_t hand = (actorHands_t)gi.ReadShort();
        const fireDefIndex_t fmIdx = gi.ReadShort();
        const int objIdx = gi.ReadShort();
        G_ActorSetTU(actor, saveTU);
        if (objIdx != NONE) {
            if (fmIdx == NONE)
                G_ReactionFireSettingsReserveTUs(actor);
            else
                G_ReactionFireSettingsUpdate(actor, fmIdx, hand, INVSH_GetItemByIDX(objIdx));
        }
        G_ClientStateChangeUpdate(*actor);
    }
}

void G_ClientTeamInfo (const Player& player)
{
    const int length = gi.ReadByte(); /* Get the actor amount that the client sent. */

    for (int i = 0; i < length; i++) {
        const actorSizeEnum_t actorFieldSize = gi.ReadByte();
        /* Search for a spawn point for each entry the client sent */
        if (player.getTeam() == TEAM_NO_ACTIVE || !G_ActorSpawnIsAllowed(i, player.getTeam()))
            G_ClientSkipActorInfo();
        else {
            Actor* actor = G_ClientGetFreeSpawnPointForActorSize(player, actorFieldSize);
            if (actor) {
                Com_DPrintf(DEBUG_GAME, "Player: %i - team %i - size: %i\n", player.getNum(), actor->getTeam(), actor->fieldSize);

                G_ClientReadCharacter(actor);
                G_ClientReadInventory(actor);
                G_ClientAssignDefaultActorValues(actor);
                G_ActorGiveTimeUnits(actor);
                G_TouchTriggers(actor);
                actor->contentFlags = G_ActorGetContentFlags(actor->origin);
                AIL_InitActor(actor);
            } else {
                gi.DPrintf("Not enough spawn points for team %i (actorsize: %i)\n", player.getTeam(), actorFieldSize);

                G_ClientSkipActorInfo();
            }
        }
    }

    Com_Printf("Used inventory slots client %s spawn: %i\n", player.pers.netname, game.invi.GetUsedSlots());
}

static void G_ClientSendEdictsAndBrushModels (const Player& player)
{
    const int mask = G_PlayerToPM(player);
    /* skip the world */
    Edict* ent = G_EdictsGetFirst();

    /* make SOLID_BSP edicts visible to the client */
    while ((ent = G_EdictsGetNextInUse(ent))) {
        /* brush models that have a type - not the world - keep in
         * mind that there are several world edicts in the list in case of
         * a map assembly */
        if (ent->solid != SOLID_BSP)
            continue;

        /* skip the world(s) in case of map assembly */
        if (ent->type > ET_NULL) {
            G_EventAddBrushModel(mask, *ent);
            G_VisFlagsAdd(*ent, ~ent->visflags);
        }
    }
}

bool G_ClientBegin (Player& player)
{
    player.began = true;
    level.numplayers++;

    /* find a team */
    G_GetTeam(player);
    if (!player.began)
        return false;

    gi.ConfigString(CS_PLAYERCOUNT, "%i", level.numplayers);

    /* spawn camera (starts client rendering) */
    G_EventStart(player, sv_teamplay->integer);

    /* send things like doors and breakables */
    G_ClientSendEdictsAndBrushModels(player);

    /* ensure that the start event is send */
    G_EventEnd();

    /* set the net name */
    gi.ConfigString(CS_PLAYERNAMES + player.getNum(), "%s", player.pers.netname);

    /* inform all clients */
    gi.BroadcastPrintf(PRINT_CONSOLE, "%s has joined team %i\n", player.pers.netname, player.getTeam());

    return true;
}

void G_ClientStartMatch (Player& player)
{
    G_GetStartingTeam(player);

    /* do all the init events here... */
    /* reset the data */
    G_EventReset(player, level.activeTeam);

    /* show visible actors and add invisible actor */
    G_VisFlagsClear(player.getTeam());
    G_CheckVisPlayer(player, false);
    G_SendInvisible(player);

    /* submit stats */
    G_SendPlayerStats(player);

    /* ensure that the last event is send, too */
    G_EventEnd();

    if (G_IsMultiPlayer()) {
        /* ensure that we restart the round time limit */
        sv_roundtimelimit->modified = true;
    }

    /* inform all clients */
    gi.BroadcastPrintf(PRINT_CONSOLE, "%s has taken control over team %i.\n", player.pers.netname, player.getTeam());
}

void G_ClientUserinfoChanged (Player& player, const char* userinfo)
{
    const bool alreadyReady = player.isReady();
    const int oldTeamnum = Info_IntegerForKey(player.pers.userinfo, "cl_teamnum");

    /* check for malformed or illegal info strings */
    if (!Info_Validate(userinfo))
        userinfo = "\\cl_name\\badinfo";

    /* set name */
    Q_strncpyz(player.pers.netname, Info_ValueForKey(userinfo, "cl_name"), sizeof(player.pers.netname));
    Q_strncpyz(player.pers.userinfo, userinfo, sizeof(player.pers.userinfo));
    player.autostand = Info_IntegerForKey(userinfo, "cl_autostand");
    player.setReady(Info_IntegerForKey(userinfo, "cl_ready"));

    /* send the updated config string */
    gi.ConfigString(CS_PLAYERNAMES + player.getNum(), "%s", player.pers.netname);

    /* try to update to the preferred team */
    if (!G_MatchIsRunning() && oldTeamnum != Info_IntegerForKey(userinfo, "cl_teamnum")) {
        /* if the player is marked as ready he can't change his team */
        if (!alreadyReady || !player.isReady()) {
            player.setTeam(TEAM_NO_ACTIVE);
            G_GetTeam(player);
        } else {
            Com_DPrintf(DEBUG_GAME, "G_ClientUserinfoChanged: player %s is already marked as being ready\n",
                    player.pers.netname);
        }
    }
}

bool G_ClientConnect (Player* player, char* userinfo, size_t userinfoSize)
{
    const char* value = Info_ValueForKey(userinfo, "ip");

    Com_Printf("connection attempt from %s\n", value);

    /* check to see if they are on the banned IP list */
    if (SV_FilterPacket(value)) {
        Info_SetValueForKey(userinfo, userinfoSize, "rejmsg", REJ_BANNED);
        return false;
    }

    if (!G_PlayerToPM(*player)) {
        Info_SetValueForKey(userinfo, userinfoSize, "rejmsg", REJ_SERVER_FULL);
        return false;
    }

    value = Info_ValueForKey(userinfo, "password");
    if (password->string[0] != '\0' && !Q_streq(password->string, "none") && !Q_streq(password->string, value)) {
        Info_SetValueForKey(userinfo, userinfoSize, "rejmsg", REJ_PASSWORD_REQUIRED_OR_INCORRECT);
        return false;
    }

    /* fix for fast reconnects after a disconnect */
    if (player->isInUse()) {
        gi.BroadcastPrintf(PRINT_CONSOLE, "%s already in use.\n", player->pers.netname);
        G_ClientDisconnect(*player);
    }

    /* reset persistent data */
    OBJZERO(player->pers);
    G_ClientUserinfoChanged(*player, userinfo);

    gi.BroadcastPrintf(PRINT_CONSOLE, "%s is connecting...\n", player->pers.netname);
    return true;
}

void G_ClientDisconnect (Player& player)
{
    /* only if the player already sent his began */
    if (player.began) {
        level.numplayers--;
        gi.ConfigString(CS_PLAYERCOUNT, "%i", level.numplayers);

        if (level.activeTeam == player.getTeam())
            G_ClientEndRound(player);

        /* if no more players are connected - stop the server */
        G_MatchEndCheck();
    }

#if 0
    /* now let's remove all the edicts that belongs to this player */
    Actor* actor = nullptr;
    while ((actor = G_EdictsGetNextLivingActor(actor))) {
        if (actor->pnum == player.num)
            G_ActorDie(actor, STATE_DEAD, nullptr);
    }
    G_MatchEndCheck();
#endif

    player.began = false;
    player.roundDone = false;
    player.setReady(false);

    gi.BroadcastPrintf(PRINT_CONSOLE, "%s disconnected.\n", player.pers.netname);
}

void G_ResetClientData (void)
{
    scoreMissionNum = 0;
    OBJZERO(scoreMission);
}