(*

 * Hedgewars, a worms-like game

 * Copyright (c) 2005, 2006 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

 *)

unit uAI;

interface

uses uFloat;

{$INCLUDE options.inc}

procedure ProcessBot(FrameNo: Longword);

procedure FreeActionsList;

implementation

uses uTeams, uConsts, SDLh, uAIMisc, uGears, uAIAmmoTests, uAIActions, uMisc,

     uAIThinkStack, uAmmos;

var BestActions: TActions;

    CanUseAmmo: array [TAmmoType] of boolean;

    AIThinkStart: Longword;

    isThinking: boolean = false;

procedure FreeActionsList;

begin

isThinking:= false;

BestActions.Count:= 0;

BestActions.Pos:= 0

end;

procedure TestAmmos(var Actions: TActions; Me: PGear);

var Time, BotLevel: Longword;

    Angle, Power, Score, ExplX, ExplY, ExplR: LongInt;

    i: LongInt;

    a, aa: TAmmoType;

begin

BotLevel:= PHedgehog(Me^.Hedgehog)^.BotLevel;

for i:= 0 to Pred(Targets.Count) do

    if (Targets.ar[i].Score >= 0) then

       begin

       with CurrentTeam^.Hedgehogs[CurrentTeam^.CurrHedgehog] do

            a:= Ammo^[CurSlot, CurAmmo].AmmoType;

       aa:= a;

       repeat

        if CanUseAmmo[a] then

           begin

           Score:= AmmoTests[a](Me, Targets.ar[i].Point, BotLevel, Time, Angle, Power, ExplX, ExplY, ExplR);

           if Actions.Score + Score > BestActions.Score then

              begin

              BestActions:= Actions;

              inc(BestActions.Score, Score);

              AddAction(BestActions, aia_Weapon, Longword(a), 500, 0, 0);

              if Time <> 0 then AddAction(BestActions, aia_Timer, Time div 1000, 400, 0, 0);

              if (Angle > 0) then AddAction(BestActions, aia_LookRight, 0, 200, 0, 0)

              else if (Angle < 0) then AddAction(BestActions, aia_LookLeft, 0, 200, 0, 0);

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

                 begin

                 Angle:= LongInt(Me^.Angle) - Abs(Angle);

                 if Angle > 0 then

                    begin

                    AddAction(BestActions, aia_Up, aim_push, 500, 0, 0);

                    AddAction(BestActions, aia_Up, aim_release, Angle, 0, 0)

                    end else if Angle < 0 then

                    begin

                    AddAction(BestActions, aia_Down, aim_push, 500, 0, 0);

                    AddAction(BestActions, aia_Down, aim_release, -Angle, 0, 0)

                    end

                 end;

              AddAction(BestActions, aia_attack, aim_push, 800, 0, 0);

              AddAction(BestActions, aia_attack, aim_release, Power, 0, 0);

              if ExplR > 0 then

                 AddAction(BestActions, aia_AwareExpl, ExplR, 10, ExplX, ExplY);

              end

           end;

        if a = High(TAmmoType) then a:= Low(TAmmoType)

                               else inc(a)

       until (a = aa) or (PHedgehog(Me^.Hedgehog)^.AttacksNum > 0)

       end

end;

procedure Walk(Me: PGear);

const FallPixForBranching = cHHRadius * 2 + 8;

var Actions: TActions;

    ticks, maxticks, steps, BotLevel: Longword;

    BaseRate, Rate: LongInt;

    GoInfo: TGoInfo;

    CanGo: boolean;

    AltMe: TGear;

begin

BotLevel:= PHedgehog(Me^.Hedgehog)^.BotLevel;

if (Me^.State and gstAttacked) = 0 then maxticks:= max(0, TurnTimeLeft - 5000 - 4000 * BotLevel)

                                  else maxticks:= TurnTimeLeft;

BaseRate:= RatePlace(Me);

repeat

    if not Pop(ticks, Actions, Me^) then

       begin

       isThinking:= false;

       exit

       end;

    AddAction(Actions, Me^.Message, aim_push, 10, 0, 0);

    if (Me^.Message and gm_Left) <> 0 then AddAction(Actions, aia_WaitXL, hwRound(Me^.X), 0, 0, 0)

                                      else AddAction(Actions, aia_WaitXR, hwRound(Me^.X), 0, 0, 0);

    AddAction(Actions, Me^.Message, aim_release, 0, 0, 0);

    steps:= 0;

    if ((Me^.State and gstAttacked) = 0) then TestAmmos(Actions, Me);

    while not PosInThinkStack(Me) do

       begin

       CanGo:= HHGo(Me, @AltMe, GoInfo);

       inc(ticks, GoInfo.Ticks);

       if ticks > maxticks then break;

       if (BotLevel < 5) and (GoInfo.JumpType = jmpHJump) then // hjump support

          if Push(ticks, Actions, AltMe, Me^.Message) then

             with ThinkStack.States[Pred(ThinkStack.Count)] do

                  begin

                  AddAction(MadeActions, aia_HJump, 0, 305, 0, 0);

                  AddAction(MadeActions, aia_HJump, 0, 350, 0, 0);

                  if (Me^.dX < 0) then AddAction(MadeActions, aia_WaitXL, hwRound(AltMe.X), 0, 0, 0)

                                  else AddAction(MadeActions, aia_WaitXR, hwRound(AltMe.X), 0, 0, 0);

                  end;

       if (BotLevel < 3) and (GoInfo.JumpType = jmpLJump) then // ljump support

          if Push(ticks, Actions, AltMe, Me^.Message) then

             with ThinkStack.States[Pred(ThinkStack.Count)] do

                  begin

                  AddAction(MadeActions, aia_LJump, 0, 305, 0, 0);

                  if (Me^.dX < 0) then AddAction(MadeActions, aia_WaitXL, hwRound(AltMe.X), 0, 0, 0)

                                  else AddAction(MadeActions, aia_WaitXR, hwRound(AltMe.X), 0, 0, 0);

                  end;

       if not CanGo then break;

       inc(steps);

       Actions.actions[Actions.Count - 2].Param:= hwRound(Me^.X);

       Rate:= RatePlace(Me);

       if Rate > BaseRate then

          begin

          BestActions:= Actions;

          BestActions.Score:= 1;

          isThinking:= false;

          exit

          end

       else if Rate < BaseRate then break;

       if GoInfo.FallPix >= FallPixForBranching then

          Push(ticks, Actions, Me^, Me^.Message xor 3); // aia_Left xor 3 = aia_Right

       if ((Me^.State and gstAttacked) = 0)

           and ((steps mod 4) = 0) then

           begin

           TestAmmos(Actions, Me);

           if SDL_GetTicks - AIThinkStart >= cTimerInterval then

              begin

              dec(Actions.Count, 3);

              Push(ticks, Actions, Me^, Me^.Message);

              exit

              end

           end

       end;

until false

end;

procedure Think(Me: PGear);

var BackMe, WalkMe: TGear;

begin

AIThinkStart:= SDL_GetTicks;

BackMe:= Me^;

WalkMe:= BackMe;

if (Me^.State and gstAttacked) = 0 then

   if Targets.Count > 0 then

      begin

      Walk(@WalkMe);

      if not isThinking then

         begin

         if BestActions.Score < -1023 then

            begin

            BestActions.Count:= 0;

            AddAction(BestActions, aia_Skip, 0, 250, 0, 0);

            end;

         Me^.State:= Me^.State and not gstHHThinking

         end

      end else

else begin

      FillBonuses(true);

      Walk(@WalkMe);

      AddAction(BestActions, aia_Wait, GameTicks + 100, 100, 0, 0);

      end

end;

procedure StartThink(Me: PGear);

var a: TAmmoType;

    tmp: LongInt;

begin

if ((Me^.State and gstAttacking) <> 0) or isInMultiShoot then exit;

ThinkingHH:= Me;

isThinking:= true;

ClearThinkStack;

Me^.State:= Me^.State or gstHHThinking;

Me^.Message:= 0;

FillTargets;

if Targets.Count = 0 then

   begin

   OutError('AI: no targets!?', false);

   exit

   end;

FillBonuses((Me^.State and gstAttacked) <> 0);

for a:= Low(TAmmoType) to High(TAmmoType) do

    CanUseAmmo[a]:= Assigned(AmmoTests[a]) and HHHasAmmo(PHedgehog(Me^.Hedgehog), a);

BestActions.Count:= 0;

BestActions.Pos:= 0;

BestActions.Score:= 0;

tmp:= random(2) + 1;

Push(0, BestActions, Me^, tmp);

Push(0, BestActions, Me^, tmp xor 3);

BestActions.Score:= Low(LongInt);

Think(Me)

end; 

procedure ProcessBot(FrameNo: Longword);

const LastFrameNo: Longword = 0;

begin

with CurrentTeam^.Hedgehogs[CurrentTeam^.CurrHedgehog] do

     if (Gear <> nil)

        and ((Gear^.State and gstHHDriven) <> 0)

        and (TurnTimeLeft < cHedgehogTurnTime - 50) then

        if not isThinking then

           if (BestActions.Pos >= BestActions.Count) then StartThink(Gear)

                                                     else ProcessAction(BestActions, Gear)

        else if FrameNo <> LastFrameNo then

                begin

                LastFrameNo:= FrameNo;

                Think(Gear)

                end;

end;

end.