(*

 * 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 uGearsHedgehog;

interface

uses uTypes;

procedure doStepHedgehog(Gear: PGear);

procedure AfterAttack; 

procedure HedgehogStep(Gear: PGear); 

procedure doStepHedgehogMoving(Gear: PGear); 

procedure HedgehogChAngle(HHGear: PGear); 

procedure PickUp(HH, Gear: PGear);

procedure AddPickup(HH: THedgehog; ammo: TAmmoType; cnt, X, Y: LongWord);

implementation

uses uConsts, uVariables, uFloat, uAmmos, uSound, uCaptions, 

    uCommands, uLocale, uUtils, uVisualGears, uStats, uIO, uScript,

    uGearsList, uGears, uCollisions, uRandom, uStore, uTeams, 

    uGearsUtils;

var GHStepTicks: LongWord = 0;

// Shouldn't more of this ammo switching stuff be moved to uAmmos ?

function ChangeAmmo(HHGear: PGear): boolean;

var slot, i: Longword;

    ammoidx: LongInt;

    prevAmmo: TAmmoType;

begin

ChangeAmmo:= false;

slot:= HHGear^.MsgParam;

with HHGear^.Hedgehog^ do

    begin

    HHGear^.Message:= HHGear^.Message and (not gmSlot);

    prevAmmo:= CurAmmoType;

    ammoidx:= 0;

    if ((HHGear^.State and (gstAttacking or gstAttacked)) <> 0)

    or ((MultiShootAttacks > 0) and ((Ammoz[CurAmmoType].Ammo.Propz and ammoprop_NoRoundEnd) = 0))

    or ((HHGear^.State and gstHHDriven) = 0) then

        exit;

    ChangeAmmo:= true;

    while (ammoidx < cMaxSlotAmmoIndex) and (Ammo^[slot, ammoidx].AmmoType <> CurAmmoType) do

        inc(ammoidx);

    if ((Ammoz[CurAmmoType].Ammo.Propz and ammoprop_NoRoundEnd) <> 0) and (MultiShootAttacks > 0) then

        OnUsedAmmo(HHGear^.Hedgehog^);

    MultiShootAttacks:= 0;

    HHGear^.Message:= HHGear^.Message and (not (gmLJump or gmHJump));

    if Ammoz[CurAmmoType].Slot = slot then

        begin

        i:= 0;

        repeat

        inc(ammoidx);

        if (ammoidx > cMaxSlotAmmoIndex) then

            begin

            inc(i);

            CurAmmoType:= amNothing;

            ammoidx:= -1;

            //TryDo(i < 2, 'Engine bug: no ammo in current slot', true)

            end;

        until (i = 1) or ((Ammo^[slot, ammoidx].Count > 0)

        and (Team^.Clan^.TurnNumber > Ammoz[Ammo^[slot, ammoidx].AmmoType].SkipTurns))

        end 

    else

        begin

        i:= 0;

        // check whether there is ammo in slot

        while (i <= cMaxSlotAmmoIndex) and ((Ammo^[slot, i].Count = 0)

        or (Team^.Clan^.TurnNumber <= Ammoz[Ammo^[slot, i].AmmoType].SkipTurns))

            do inc(i);

        if i <= cMaxSlotAmmoIndex then

            ammoidx:= i

        else ammoidx:= -1

        end;

        if ammoidx >= 0 then

            CurAmmoType:= Ammo^[slot, ammoidx].AmmoType;

    if (prevAmmo <> CurAmmoType) then

        begin

        if CurAmmoType = amKnife then

            LoadHedgehogHat(HHGear^.Hedgehog^, 'Reserved/chef')

        else if prevAmmo = amKnife then

            LoadHedgehogHat(HHGear^.Hedgehog^, Hat);

        end

    end

end;

procedure HHSetWeapon(HHGear: PGear);

var t: LongInt;

    weap: TAmmoType;

    Hedgehog: PHedgehog;

    s: boolean;

begin

s:= false;

weap:= TAmmoType(HHGear^.MsgParam);

Hedgehog:= HHGear^.Hedgehog;

if Hedgehog^.Team^.Clan^.TurnNumber <= Ammoz[weap].SkipTurns then

    exit; // weapon is not activated yet

HHGear^.MsgParam:= Ammoz[weap].Slot;

t:= cMaxSlotAmmoIndex;

HHGear^.Message:= HHGear^.Message and (not gmWeapon);

with Hedgehog^ do

    while (CurAmmoType <> weap) and (t >= 0) do

        begin

        s:= ChangeAmmo(HHGear);

        dec(t)

        end;

if s then

    ApplyAmmoChanges(HHGear^.Hedgehog^)

end;

procedure HHSetTimer(Gear: PGear);

var CurWeapon: PAmmo;

    color: LongWord;

begin

Gear^.Message:= Gear^.Message and (not gmTimer);

CurWeapon:= GetCurAmmoEntry(Gear^.Hedgehog^);

with Gear^.Hedgehog^ do

    if ((Gear^.Message and gmPrecise) <> 0) and ((CurWeapon^.Propz and ammoprop_SetBounce) <> 0) then

        begin

        color:= Gear^.Hedgehog^.Team^.Clan^.Color;

        case Gear^.MsgParam of

            1: begin

               AddCaption(FormatA(trmsg[sidBounce], trmsg[sidBounce1]), color, capgrpAmmostate);

               CurWeapon^.Bounciness:= 350;

               end;

            2: begin

               AddCaption(FormatA(trmsg[sidBounce], trmsg[sidBounce2]), color, capgrpAmmostate);

               CurWeapon^.Bounciness:= 700;

               end;

            3: begin

               AddCaption(FormatA(trmsg[sidBounce], trmsg[sidBounce3]), color, capgrpAmmostate);

               CurWeapon^.Bounciness:= 1000;

               end;

            4: begin

               AddCaption(FormatA(trmsg[sidBounce], trmsg[sidBounce4]), color, capgrpAmmostate);

               CurWeapon^.Bounciness:= 2000;

               end;

            5: begin

               AddCaption(FormatA(trmsg[sidBounce], trmsg[sidBounce5]), color, capgrpAmmostate);

               CurWeapon^.Bounciness:= 4000;

               end

            end

        end

    else if (CurWeapon^.Propz and ammoprop_Timerable) <> 0 then

        begin

        CurWeapon^.Timer:= 1000 * Gear^.MsgParam;

        with CurrentTeam^ do

            ApplyAmmoChanges(Hedgehogs[CurrHedgehog]);

        end;

end;

procedure Attack(Gear: PGear);

var xx, yy, newDx, newDy, lx, ly: hwFloat;

    speech: PVisualGear;

    newGear:  PGear;

    CurWeapon: PAmmo;

    altUse: boolean;

    elastic: hwFloat;

begin

newGear:= nil;

bShowFinger:= false;

CurWeapon:= GetCurAmmoEntry(Gear^.Hedgehog^);

with Gear^,

    Gear^.Hedgehog^ do

        begin

        if ((State and gstHHDriven) <> 0) and ((State and (gstAttacked or gstHHChooseTarget)) = 0) and (((State and gstMoving) = 0)

        or (Power > 0)

        or (CurAmmoType = amTeleport)

        or 

        // Allow attacks while moving on ammo with AltAttack

        ((CurAmmoGear <> nil) and ((Ammoz[CurAmmoGear^.AmmoType].Ammo.Propz and ammoprop_AltAttack) <> 0))

        or ((Ammoz[CurAmmoType].Ammo.Propz and ammoprop_AttackInMove) <> 0))

        and ((TargetPoint.X <> NoPointX) or ((Ammoz[CurAmmoType].Ammo.Propz and ammoprop_NeedTarget) = 0)) then

            begin

            State:= State or gstAttacking;

            if Power = cMaxPower then

                Message:= Message and (not gmAttack)

            else if (Ammoz[CurAmmoType].Ammo.Propz and ammoprop_Power) = 0 then

                Message:= Message and (not gmAttack)

            else

                begin

                if Power = 0 then

                    begin

                    AttackBar:= CurrentTeam^.AttackBar;

                    PlaySound(sndThrowPowerUp)

                    end;

                inc(Power)

                end;

        if ((Message and gmAttack) <> 0) then

            exit;

        if (Ammoz[CurAmmoType].Ammo.Propz and ammoprop_Power) <> 0 then

            begin

            StopSound(sndThrowPowerUp);

            PlaySound(sndThrowRelease);

            end;

        xx:= SignAs(AngleSin(Angle), dX);

        yy:= -AngleCos(Angle);

        lx:= X + int2hwfloat(round(GetLaunchX(CurAmmoType, hwSign(dX), Angle)));

        ly:= Y + int2hwfloat(round(GetLaunchY(CurAmmoType, Angle)));

        if ((Gear^.State and gstHHHJump) <> 0) and (not cArtillery) then

            xx:= - xx;

        if Ammoz[CurAmmoType].Ammo.AttackVoice <> sndNone then

            AddVoice(Ammoz[CurAmmoType].Ammo.AttackVoice, CurrentTeam^.voicepack);

// Initiating alt attack

        if  (CurAmmoGear <> nil)

        and ((Ammoz[CurAmmoGear^.AmmoType].Ammo.Propz and ammoprop_AltAttack) <> 0)

        and ((Gear^.Message and gmLJump) <> 0)

        and ((Ammoz[CurAmmoType].Ammo.Propz and ammoprop_AltUse) <> 0) then

            begin

            newDx:= dX; 

            newDy:= dY;

            altUse:= true

            end

        else

            begin

            newDx:= xx*Power/cPowerDivisor;

            newDy:= yy*Power/cPowerDivisor;

            altUse:= false

            end;

             case CurAmmoType of

                      amGrenade: newGear:= AddGear(hwRound(lx), hwRound(ly), gtGrenade,         0, newDx, newDy, CurWeapon^.Timer);

                      amMolotov: newGear:= AddGear(hwRound(lx), hwRound(ly), gtMolotov,      0, newDx, newDy, 0);

                  amClusterBomb: newGear:= AddGear(hwRound(lx), hwRound(ly), gtClusterBomb,  0, newDx, newDy, CurWeapon^.Timer);

                      amGasBomb: newGear:= AddGear(hwRound(lx), hwRound(ly), gtGasBomb,      0, newDx, newDy, CurWeapon^.Timer);

                      amBazooka: newGear:= AddGear(hwRound(lx), hwRound(ly), gtShell,        0, newDx, newDy, 0);

                     amSnowball: newGear:= AddGear(hwRound(lx), hwRound(ly), gtSnowball,     0, newDx, newDy, 0);

                          amBee: newGear:= AddGear(hwRound(lx), hwRound(ly), gtBee,          0, newDx, newDy, 0);

                      amShotgun: begin

                                 PlaySound(sndShotgunReload);

                                 newGear:= AddGear(hwRound(lx), hwRound(ly), gtShotgunShot,  0, xx * _0_5, yy * _0_5, 0);

                                 end;

                   amPickHammer: newGear:= AddGear(hwRound(lx), hwRound(ly) + cHHRadius, gtPickHammer, 0, _0, _0, 0);

                         amSkip: ParseCommand('/skip', true);

                         amRope: newGear:= AddGear(hwRound(lx), hwRound(ly), gtRope, 0, xx, yy, 0);

                         amMine: newGear:= AddGear(hwRound(lx) + hwSign(dX) * 7, hwRound(ly), gtMine, gstWait, SignAs(_0_02, dX), _0, 3000);

                        amSMine: newGear:= AddGear(hwRound(lx), hwRound(ly), gtSMine,    0, xx*Power/cPowerDivisor, yy*Power/cPowerDivisor, 0);

                        amKnife: begin 

                                 newGear:= AddGear(hwRound(lx), hwRound(ly), gtKnife,    0, xx*Power/cPowerDivisor, yy*Power/cPowerDivisor, 0);

                                 newGear^.State:= newGear^.State or gstMoving; 

                                 newGear^.Radius:= 6 // temporarily shrink so it doesn't instantly embed in the ground

                                 end;

                       amDEagle: newGear:= AddGear(hwRound(lx + xx * cHHRadius), hwRound(ly + yy * cHHRadius), gtDEagleShot, 0, xx * _0_5, yy * _0_5, 0);

                      amSineGun: newGear:= AddGear(hwRound(lx + xx * cHHRadius), hwRound(ly + yy * cHHRadius), gtSineGunShot, 0, xx * _0_5, yy * _0_5, 0);

                    amPortalGun: begin

                                 newGear:= AddGear(hwRound(lx + xx * cHHRadius), hwRound(ly + yy * cHHRadius), gtPortal, 0, xx * _0_6, yy * _0_6, 

                                 // set selected color

                                 CurWeapon^.Pos);

                                 end;

                  amSniperRifle: begin

                                 PlaySound(sndSniperReload);

                                 newGear:= AddGear(hwRound(lx + xx * cHHRadius), hwRound(ly + yy * cHHRadius), gtSniperRifleShot, 0, xx * _0_5, yy * _0_5, 0);

                                 end;

                     amDynamite: newGear:= AddGear(hwRound(lx) + hwSign(dX) * 7, hwRound(ly), gtDynamite, 0, SignAs(_0_03, dX), _0, 5000);

                    amFirePunch: newGear:= AddGear(hwRound(lx) + hwSign(dX) * 10, hwRound(ly), gtFirePunch, 0, xx, _0, 0);

                         amWhip: begin

                                 newGear:= AddGear(hwRound(lx) + hwSign(dX) * 10, hwRound(ly), gtWhip, 0, SignAs(_1, dX), - _0_8, 0);

                                 PlaySound(sndWhipCrack)

                                 end;

                       amHammer: begin

                                 newGear:= AddGear(hwRound(lx) + hwSign(dX) * 10, hwRound(ly), gtHammer, 0, SignAs(_1, dX), - _0_8, 0);

                                 PlaySound(sndWhack)

                                 end;

                  amBaseballBat: begin

                                 newGear:= AddGear(hwRound(lx) + hwSign(dX) * 10, hwRound(ly), gtShover, gsttmpFlag, xx * _0_5, yy * _0_5, 0);

                                 PlaySound(sndBaseballBat) // TODO: Only play if something is hit?

                                 end;

                    amParachute: begin

                                 newGear:= AddGear(hwRound(lx), hwRound(ly), gtParachute, 0, _0, _0, 0);

                                 PlaySound(sndParachute)

                                 end;

                    // we save CurWeapon^.Pos (in this case: cursor direction) by using it as (otherwise irrelevant) X value of the new gear.

                    amAirAttack: newGear:= AddGear(CurWeapon^.Pos, 0, gtAirAttack, 0, _0, _0, 0);

                   amMineStrike: newGear:= AddGear(CurWeapon^.Pos, 0, gtAirAttack, 1, _0, _0, 0);

                  amDrillStrike: newGear:= AddGear(CurWeapon^.Pos, 0, gtAirAttack, 3, _0, _0, CurWeapon^.Timer);

                       amNapalm: newGear:= AddGear(CurWeapon^.Pos, 0, gtAirAttack, 2, _0, _0, 0);

                    amBlowTorch: newGear:= AddGear(hwRound(lx), hwRound(ly), gtBlowTorch, 0, SignAs(_0_5, dX), _0, 0);

                       amGirder: newGear:= AddGear(0, 0, gtGirder, CurWeapon^.Pos, _0, _0, 0);

                     amTeleport: newGear:= AddGear(CurWeapon^.Pos, 0, gtTeleport, 0, _0, _0, 0);

                       amSwitch: newGear:= AddGear(hwRound(lx), hwRound(ly), gtSwitcher, 0, _0, _0, 0);

                       amMortar: begin

                                 playSound(sndMortar);

                                 newGear:= AddGear(hwRound(lx), hwRound(ly), gtMortar,  0, xx*cMaxPower/cPowerDivisor, yy*cMaxPower/cPowerDivisor, 0);

                                 end;

                      amRCPlane: begin

                                 newGear:= AddGear(hwRound(lx), hwRound(ly), gtRCPlane,  0, xx * cMaxPower / cPowerDivisor / 4, yy * cMaxPower / cPowerDivisor / 4, 0);

                                 newGear^.SoundChannel:= LoopSound(sndRCPlane)

                                 end;

                     amKamikaze: newGear:= AddGear(hwRound(lx), hwRound(ly), gtKamikaze, 0, xx * _0_5, yy * _0_5, 0);

                         amCake: newGear:= AddGear(hwRound(lx) + hwSign(dX) * 3, hwRound(ly), gtCake, 0, SignAs(cLittle, xx), _0, 0);

                    amSeduction: newGear:= AddGear(hwRound(lx), hwRound(ly), gtSeduction, 0, _0, _0, 0);

                   amWatermelon: newGear:= AddGear(hwRound(lx), hwRound(ly), gtWatermelon,  0, newDx, newDy, CurWeapon^.Timer);

                  amHellishBomb: newGear:= AddGear(hwRound(lx), hwRound(ly), gtHellishBomb,    0, newDx, newDy, 0);

                        amDrill: newGear:= AddGear(hwRound(lx), hwRound(ly), gtDrill, 0, newDx, newDy, 0);

                      amBallgun: newGear:= AddGear(hwRound(X), hwRound(Y), gtBallgun,  0, xx * _0_5, yy * _0_5, 0);

                      amJetpack: newGear:= AddGear(hwRound(lx), hwRound(ly), gtJetpack, 0, _0, _0, 0);

                        amBirdy: begin

                             PlaySound(sndWhistle);

                             newGear:= AddGear(hwRound(lx), hwRound(ly) - 32, gtBirdy, 0, _0, _0, 0);

                             end;

                   amLowGravity: begin

                                 PlaySound(sndLowGravity);

                                 cGravity:= cMaxWindSpeed;

                                 cGravityf:= 0.00025

                                 end;

                  amExtraDamage: begin 

                                 PlaySound(sndHellishImpact4);

                                 cDamageModifier:= _1_5

                                 end;

                 amInvulnerable: Invulnerable:= true;

                    amExtraTime: begin

                                 PlaySound(sndSwitchHog);

                                 TurnTimeLeft:= TurnTimeLeft + 30000

                                 end;

                   amLaserSight: cLaserSighting:= true;

                     amVampiric: begin

                                 PlaySoundV(sndOw1, Team^.voicepack);

                                 cVampiric:= true;

                                 end;

                        amPiano: begin

                                 // Tuck the hedgehog away until the piano attack is completed

                                 Unplaced:= true;

                                 X:= _0;

                                 Y:= _0;

                                 newGear:= AddGear(TargetPoint.X, 0, gtPiano, 0, _0, _0, 0);

                                 PauseMusic

                                 end;

                 amFlamethrower: newGear:= AddGear(hwRound(X), hwRound(Y), gtFlamethrower,  0, xx * _0_5, yy * _0_5, 0);

                      amLandGun: newGear:= AddGear(hwRound(X), hwRound(Y), gtLandGun,  0, xx * _0_5, yy * _0_5, 0);

                  amResurrector: begin

                                 newGear:= AddGear(hwRound(lx), hwRound(ly), gtResurrector, 0, _0, _0, 0);

                                 newGear^.SoundChannel := LoopSound(sndResurrector);

                                 end;

                    amStructure: newGear:= AddGear(hwRound(lx) + hwSign(dX) * 7, hwRound(ly), gtStructure, gstWait, SignAs(_0_02, dX), _0, 3000);

                       amTardis: newGear:= AddGear(hwRound(X), hwRound(Y), gtTardis, 0, _0, _0, 5000);

                       amIceGun: newGear:= AddGear(hwRound(X), hwRound(Y), gtIceGun, 0, _0, _0, 0);

             end;

             if altUse and (newGear <> nil) then

                begin

                newGear^.dX:= newDx / newGear^.Density;

                newGear^.dY:= newDY / newGear^.Density

                end;

             case CurAmmoType of

                      amGrenade, amMolotov, 

                  amClusterBomb, amGasBomb, 

                      amBazooka, amSnowball, 

                          amBee, amSMine,

                       amMortar, amWatermelon,

                  amHellishBomb, amDrill: FollowGear:= newGear;

                      amShotgun, amPickHammer,

                         amRope, amDEagle,

                      amSineGun, amSniperRifle,

                    amFirePunch, amWhip,

                       amHammer, amBaseballBat,

                    amParachute, amBlowTorch,

                       amGirder, amTeleport,

                       amSwitch, amRCPlane,

                     amKamikaze, amCake,

                    amSeduction, amBallgun,

                      amJetpack, amBirdy,

                 amFlamethrower, amLandGun,

                  amResurrector, amStructure,

                       amTardis, amPiano,

                       amIceGun: CurAmmoGear:= newGear;

             end;

            if ((CurAmmoType = amMine) or (CurAmmoType = amSMine)) and (GameFlags and gfInfAttack <> 0) then

                newGear^.FlightTime:= GameTicks + 1000

            else if CurAmmoType = amDrill then

                newGear^.FlightTime:= GameTicks + 250;

        if Ammoz[CurAmmoType].Ammo.Propz and ammoprop_NeedTarget <> 0 then

            begin

            newGear^.Target.X:= TargetPoint.X;

            newGear^.Target.Y:= TargetPoint.Y

            end;

        if (newGear <> nil) and (newGear^.CollisionMask and $80 <> 0) then newGear^.CollisionMask:= newGear^.CollisionMask and (not $80);

        // Clear FollowGear if using on a rope/parachute/saucer etc so focus stays with the hog's movement

        if altUse then

            FollowGear:= nil;

        if (newGear <> nil) and ((Ammoz[newGear^.AmmoType].Ammo.Propz and ammoprop_SetBounce) <> 0) then

            begin

            elastic:=  int2hwfloat(CurWeapon^.Bounciness) / _1000;

            if elastic < _1 then

                newGear^.Elasticity:= newGear^.Elasticity * elastic

            else if elastic > _1 then

                newGear^.Elasticity:= _1 - ((_1-newGear^.Elasticity) / elastic);

(* Experimented with friction modifier. Didn't seem helpful 

            fric:= int2hwfloat(CurWeapon^.Bounciness) / _250;

            if fric < _1 then newGear^.Friction:= newGear^.Friction * fric

            else if fric > _1 then newGear^.Friction:= _1 - ((_1-newGear^.Friction) / fric)*)

            end;

        uStats.AmmoUsed(CurAmmoType);

        if not (SpeechText = '') then

            begin

            speech:= AddVisualGear(0, 0, vgtSpeechBubble);

            if speech <> nil then

                begin

                speech^.Text:= SpeechText;

                speech^.Hedgehog:= Gear^.Hedgehog;

                speech^.FrameTicks:= SpeechType;

                end;

            SpeechText:= ''

            end;

        Power:= 0;

        if (CurAmmoGear <> nil)

            and ((Ammoz[CurAmmoType].Ammo.Propz and ammoprop_AltUse) = 0){check for dropping ammo from rope} then

            begin

            Message:= Message or gmAttack;

            CurAmmoGear^.Message:= Message

            end

        else

            begin

            if not CurrentTeam^.ExtDriven

            and ((Ammoz[CurAmmoType].Ammo.Propz and ammoprop_Power) <> 0) then

                SendIPC(_S'a');

            AfterAttack;

            end

        end

    else 

        Message:= Message and (not gmAttack);

    end;

    TargetPoint.X := NoPointX;

    ScriptCall('onHogAttack');

end;

procedure AfterAttack;

var s: shortstring;

    a: TAmmoType;

    HHGear: PGear;

begin

with CurrentHedgehog^ do

    begin

    HHGear:= Gear;

    a:= CurAmmoType;

    if HHGear <> nil then HHGear^.State:= HHGear^.State and (not gstAttacking);

    if (Ammoz[a].Ammo.Propz and ammoprop_Effect) = 0 then

        begin

        Inc(MultiShootAttacks);

        if (Ammoz[a].Ammo.NumPerTurn >= MultiShootAttacks) then

            begin

            s:= inttostr(Ammoz[a].Ammo.NumPerTurn - MultiShootAttacks + 1);

            AddCaption(format(trmsg[sidRemaining], s), cWhiteColor, capgrpAmmostate);

            end;

        if (Ammoz[a].Ammo.NumPerTurn >= MultiShootAttacks)

        or ((GameFlags and gfMultiWeapon) <> 0) then