(*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2004-2012 Andrey Korotaev <unC0Rr@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; version 2 of the License

 *

 * 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 "options.inc"}

unit uGears;

(*

 * This unit defines the behavior of gears.

 *

 * Gears are "things"/"objects" that may be visible to the player or not,

 * but always have an effect on the course of the game.

 *

 * E.g.: weapons, hedgehogs, etc.

 *

 * Note: The visual appearance of gears is defined in the unit "uGearsRender".

 *

 * Note: Gears that do not have an effect on the game but are just visual

 *       effects are called "Visual Gears" and defined in the respective unit!

 *)

interface

uses SDLh, uConsts, uFloat, uTypes;

procedure initModule;

procedure freeModule;

function  SpawnCustomCrateAt(x, y: LongInt; crate: TCrateType; content, cnt: Longword): PGear;

function  SpawnFakeCrateAt(x, y: LongInt; crate: TCrateType; explode: boolean; poison: boolean ): PGear;

function  GetAmmo(Hedgehog: PHedgehog): TAmmoType;

function  GetUtility(Hedgehog: PHedgehog): TAmmoType;

procedure HideHog(HH: PHedgehog);

procedure RestoreHog(HH: PHedgehog);

procedure ProcessGears;

procedure EndTurnCleanup;

procedure SetAllToActive;

procedure SetAllHHToActive;

procedure DrawGears;

procedure FreeGearsList;

procedure AddMiscGears;

procedure AssignHHCoords;

function  GearByUID(uid : Longword) : PGear;

procedure doStepDrowningGear(Gear: PGear);

implementation

uses uStore, uSound, uTeams, uRandom, uCollisions, uIO, uLandGraphics,

    uLocale, uAI, uAmmos, uStats, uVisualGears, uScript, GLunit, uMobile, uVariables,

    uCommands, uUtils, uTextures, uRenderUtils, uGearsRender, uCaptions, uDebug, uLandTexture,

    uGearsHedgehog, uGearsUtils, uGearsList, uGearsHandlers, uGearsHandlersRope;

var skipFlag: boolean;

procedure AmmoShove(Ammo: PGear; Damage, Power: LongInt); forward;

//procedure AmmoFlameWork(Ammo: PGear); forward;

function  GearsNear(X, Y: hwFloat; Kind: TGearType; r: LongInt): PGearArrayS; forward;

procedure SpawnBoxOfSmth; forward;

procedure ShotgunShot(Gear: PGear); forward;

procedure doStepCase(Gear: PGear); forward;

var delay: LongWord;

    delay2: LongWord;

    step: (stDelay, stChDmg, stSweep, stTurnReact,

    stAfterDelay, stChWin, stWater, stChWin2, stHealth,

    stSpawn, stNTurn);

    upd: Longword;

    snowLeft,snowRight: LongInt;

    //SDMusic: shortstring;

// For better maintainability the step handlers of gears are stored in

// separate files.

// Note: step handlers of gears that are hedgehogs are in a different file

//       than the handlers for all other gears.

{$INCLUDE "GSHandlers.inc"}

function CheckNoDamage: boolean; // returns TRUE in case of no damaged hhs

var Gear: PGear;

    dmg: LongInt;

begin

CheckNoDamage:= true;

Gear:= GearsList;

while Gear <> nil do

    begin

    if (Gear^.Kind = gtHedgehog) and (((GameFlags and gfInfAttack) = 0) or ((Gear^.dX.QWordValue < _0_000004.QWordValue)

    and (Gear^.dY.QWordValue < _0_000004.QWordValue))) then

        begin

        if (not isInMultiShoot) then

            inc(Gear^.Damage, Gear^.Karma);

        if (Gear^.Damage <> 0) and (not Gear^.Invulnerable) then

            begin

            CheckNoDamage:= false;

            dmg:= Gear^.Damage;

            if Gear^.Health < dmg then

                begin

                Gear^.Active:= true;

                Gear^.Health:= 0

                end

            else

                dec(Gear^.Health, dmg);

            if (Gear^.Hedgehog^.Team = CurrentTeam) and (Gear^.Damage <> Gear^.Karma)

            and (not Gear^.Hedgehog^.King) and (Gear^.Hedgehog^.Effects[hePoisoned] = 0) and (not SuddenDeathDmg) then

                Gear^.State:= Gear^.State or gstLoser;

            spawnHealthTagForHH(Gear, dmg);

            RenderHealth(Gear^.Hedgehog^);

            RecountTeamHealth(Gear^.Hedgehog^.Team);

            end;

        if (not isInMultiShoot) then

            Gear^.Karma:= 0;

        Gear^.Damage:= 0

        end;

    Gear:= Gear^.NextGear

    end;

end;

procedure HealthMachine;

var Gear: PGear;

    team: PTeam;

    i: LongWord;

    flag: Boolean;

    tmp: LongWord;

begin

    Gear:= GearsList;

    while Gear <> nil do

    begin

        if Gear^.Kind = gtHedgehog then

            begin

            tmp:= 0;

            if Gear^.Hedgehog^.Effects[hePoisoned] <> 0 then

                begin

                inc(tmp, ModifyDamage(5, Gear));

                if (GameFlags and gfResetHealth) <> 0 then

                    dec(Gear^.Hedgehog^.InitialHealth)  // does not need a minimum check since <= 1 basically disables it

                end;

            if (TotalRounds > cSuddenDTurns - 1) then

                begin

                inc(tmp, cHealthDecrease);

                if (GameFlags and gfResetHealth) <> 0 then

                    dec(Gear^.Hedgehog^.InitialHealth, cHealthDecrease)

                end;

            if Gear^.Hedgehog^.King then

                begin

                flag:= false;

                team:= Gear^.Hedgehog^.Team;

                for i:= 0 to Pred(team^.HedgehogsNumber) do

                    if (team^.Hedgehogs[i].Gear <> nil) and (not team^.Hedgehogs[i].King)

                    and (team^.Hedgehogs[i].Gear^.Health > team^.Hedgehogs[i].Gear^.Damage) then

                        flag:= true;

                if not flag then

                    begin

                    inc(tmp, 5);

                    if (GameFlags and gfResetHealth) <> 0 then

                        dec(Gear^.Hedgehog^.InitialHealth, 5)

                    end

                end;

            if tmp > 0 then 

                begin

                inc(Gear^.Damage, min(tmp, max(0,Gear^.Health - 1 - Gear^.Damage)));

                HHHurt(Gear^.Hedgehog, dsPoison);

                end

            end;

        Gear:= Gear^.NextGear

    end;

end;

procedure ProcessGears;

var t: PGear;

    i, AliveCount: LongInt;

    s: shortstring;

begin

PrvInactive:= AllInactive;

AllInactive:= true;

if (StepSoundTimer > 0) and (StepSoundChannel < 0) then

    StepSoundChannel:= LoopSound(sndSteps)

else if (StepSoundTimer = 0) and (StepSoundChannel > -1) then

    begin

    StopSoundChan(StepSoundChannel);

    StepSoundChannel:= -1

    end;

if StepSoundTimer > 0 then

    dec(StepSoundTimer, 1);

t:= GearsList;

while t <> nil do

    begin

    curHandledGear:= t;

    t:= curHandledGear^.NextGear;

    if curHandledGear^.Message and gmDelete <> 0 then

        DeleteGear(curHandledGear)

    else

        begin

        if curHandledGear^.Message and gmRemoveFromList <> 0 then 

            begin

            RemoveGearFromList(curHandledGear);

            // since I can't think of any good reason this would ever be separate from a remove from list, going to keep it inside this block

            if curHandledGear^.Message and gmAddToList <> 0 then InsertGearToList(curHandledGear);

            curHandledGear^.Message:= curHandledGear^.Message and (not (gmRemoveFromList or gmAddToList))

            end;

        if curHandledGear^.Active then

            begin

            if curHandledGear^.RenderTimer and (curHandledGear^.Timer > 500) and ((curHandledGear^.Timer mod 1000) = 0) then

                begin

                FreeTexture(curHandledGear^.Tex);

                curHandledGear^.Tex:= RenderStringTex(inttostr(curHandledGear^.Timer div 1000), cWhiteColor, fntSmall);

                end;

            curHandledGear^.doStep(curHandledGear);

            // might be useful later

            //ScriptCall('onGearStep', Gear^.uid);

            end

        end

    end;

curHandledGear:= nil;

if AllInactive then

case step of

    stDelay:

        begin

        if delay = 0 then

            delay:= cInactDelay

        else

            dec(delay);

        if delay = 0 then

            inc(step)

        end;

    stChDmg:

    if CheckNoDamage then

        inc(step)

    else

        step:= stDelay;

    stSweep:

    if SweepDirty then

        begin

        SetAllToActive;

        step:= stChDmg

        end

    else

        inc(step);

    stTurnReact:

        begin

        if (not bBetweenTurns) and (not isInMultiShoot) then

            begin

            uStats.TurnReaction;

            inc(step)

            end

        else

            inc(step, 2);

        end;

    stAfterDelay:

        begin

        if delay = 0 then

            delay:= cInactDelay

        else

            dec(delay);

        if delay = 0 then

            inc(step)

            end;

    stChWin:

        begin

        CheckForWin();

        inc(step)

        end;

    stWater:

    if (not bBetweenTurns) and (not isInMultiShoot) then

        begin

        if TotalRounds = cSuddenDTurns + 1 then

            bWaterRising:= true;

        if bWaterRising and (cWaterRise > 0) then

            AddGear(0, 0, gtWaterUp, 0, _0, _0, 0)^.Tag:= cWaterRise;

        inc(step)

        end

    else // since we are not raising the water, a second win-check isn't needed

        inc(step,2);

    stChWin2:

        begin

        CheckForWin;

        inc(step)

        end;

    stHealth:

        begin

        if (cWaterRise <> 0) or (cHealthDecrease <> 0) then

             begin

            if (TotalRounds = cSuddenDTurns) and (not SuddenDeath) and (not isInMultiShoot) then

                begin

                SuddenDeath:= true;

                if cHealthDecrease <> 0 then

                    begin

                    SuddenDeathDmg:= true;

                    // flash

                    ScreenFade:= sfFromWhite;

                    ScreenFadeValue:= sfMax;

                    ScreenFadeSpeed:= 1;

                    ChangeToSDClouds;

                    ChangeToSDFlakes;

                    glClearColor(SDSkyColor.r * (SDTint/255) / 255, SDSkyColor.g * (SDTint/255) / 255, SDSkyColor.b * (SDTint/255) / 255, 0.99);

                    Ammoz[amTardis].SkipTurns:= 9999;

                    Ammoz[amTardis].Probability:= 0;

                    end;

                AddCaption(trmsg[sidSuddenDeath], cWhiteColor, capgrpGameState);

                playSound(sndSuddenDeath);

                StopMusic //No SDMusic for now

                    //ChangeMusic(SDMusic)

                    end

                else if (TotalRounds < cSuddenDTurns) and (not isInMultiShoot) then

                    begin

                    i:= cSuddenDTurns - TotalRounds;

                    s:= inttostr(i);

                    if i = 1 then

                        AddCaption(trmsg[sidRoundSD], cWhiteColor, capgrpGameState)

                    else if (i = 2) or ((i > 0) and ((i mod 50 = 0) or ((i <= 25) and (i mod 5 = 0)))) then

                        AddCaption(Format(trmsg[sidRoundsSD], s), cWhiteColor, capgrpGameState);

                    end;

                end;

            if bBetweenTurns

            or isInMultiShoot

            or (TotalRounds = -1) then

                inc(step)

            else

                begin

                bBetweenTurns:= true;

                HealthMachine;

                step:= stChDmg

                end

            end;

    stSpawn:

        begin

        if not isInMultiShoot then

            SpawnBoxOfSmth;

        inc(step)

        end;

    stNTurn:

        begin

        if isInMultiShoot then

            isInMultiShoot:= false

        else

            begin

            // delayed till after 0.9.12

            // reset to default zoom

            //ZoomValue:= ZoomDefault;

            with CurrentHedgehog^ do

                if (Gear <> nil)

                and ((Gear^.State and gstAttacked) = 0)

                and (MultiShootAttacks > 0) then

                    OnUsedAmmo(CurrentHedgehog^);

                EndTurnCleanup;

                FreeActionsList; // could send -left, -right and similar commands, so should be called before /nextturn

                ParseCommand('/nextturn', true);

                SwitchHedgehog;

                AfterSwitchHedgehog;

                bBetweenTurns:= false

                end;

            step:= Low(step)

            end;

    end

else if ((GameFlags and gfInfAttack) <> 0) then

    begin

    if delay2 = 0 then

        delay2:= cInactDelay * 50

    else

        begin

        dec(delay2);

        if ((delay2 mod cInactDelay) = 0) and (CurrentHedgehog <> nil) and (CurrentHedgehog^.Gear <> nil)

        and (not CurrentHedgehog^.Unplaced) then

            begin

            if (CurrentHedgehog^.Gear^.State and gstAttacked <> 0)

            and (Ammoz[CurrentHedgehog^.CurAmmoType].Ammo.Propz and ammoprop_NeedTarget <> 0) then

                begin

                CurrentHedgehog^.Gear^.State:= CurrentHedgehog^.Gear^.State or gstHHChooseTarget;

                isCursorVisible := true

                end;

            CurrentHedgehog^.Gear^.State:= CurrentHedgehog^.Gear^.State and (not gstAttacked);

            end;

        if delay2 = 0 then

            begin

            if (CurrentHedgehog^.Gear <> nil) and (CurrentHedgehog^.Gear^.State and gstAttacked = 0)

            and (CurAmmoGear = nil) then

                SweepDirty;

            CheckNoDamage;

            AliveCount:= 0; // shorter version of check for win to allow typical step activity to proceed

            for i:= 0 to Pred(ClansCount) do

                if ClansArray[i]^.ClanHealth > 0 then

                    inc(AliveCount);

            if (AliveCount <= 1) and ((GameFlags and gfOneClanMode) = 0) then

                begin

                step:= stChDmg;

                if TagTurnTimeLeft = 0 then

                    TagTurnTimeLeft:= TurnTimeLeft;

                TurnTimeLeft:= 0

                end

            end

        end

    end;

if TurnTimeLeft > 0 then

    if CurrentHedgehog^.Gear <> nil then

        if ((CurrentHedgehog^.Gear^.State and gstAttacking) = 0)

            and (not isInMultiShoot) then

                begin

                if (TurnTimeLeft = 5000)

                and (cHedgehogTurnTime >= 10000)

                and (not PlacingHogs)

                and (CurrentHedgehog^.Gear <> nil)

                and ((CurrentHedgehog^.Gear^.State and gstAttacked) = 0) then

                    PlaySoundV(sndHurry, CurrentTeam^.voicepack);

            if ReadyTimeLeft > 0 then

                begin

                if (ReadyTimeLeft = 2000) and (LastVoice.snd = sndNone) then

                    AddVoice(sndComeonthen, CurrentTeam^.voicepack);

                dec(ReadyTimeLeft)

                end

            else

                dec(TurnTimeLeft)

            end;

if skipFlag then

    begin

    if TagTurnTimeLeft = 0 then

        TagTurnTimeLeft:= TurnTimeLeft;

    TurnTimeLeft:= 0;

    skipFlag:= false;

    inc(CurrentHedgehog^.Team^.stats.TurnSkips);

    end;

if ((GameTicks and $FFFF) = $FFFF) then

    begin

    if (not CurrentTeam^.ExtDriven) then

        begin

        SendIPC(_S'#');

        AddFileLog('hiTicks increment message sent')

        end;

    if (not CurrentTeam^.ExtDriven) or CurrentTeam^.hasGone then

        inc(hiTicks) // we do not recieve a message for this

    end;

AddRandomness(CheckSum);

ScriptCall('onGameTick');

if GameTicks mod 20 = 0 then ScriptCall('onGameTick20');

inc(GameTicks)

end;

//Purpose, to reset all transient attributes toggled by a utility and clean up various gears and effects at end of turn

//If any of these are set as permanent toggles in the frontend, that needs to be checked and skipped here.

procedure EndTurnCleanup;