(*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2006-2008 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 uAmmos;

interface

uses uConsts, uTeams;

procedure init_uAmmos;

procedure free_uAmmos;

procedure AddAmmoStore(s: shortstring);

procedure AssignStores;

procedure AddAmmo(var Hedgehog: THedgehog; ammo: TAmmoType);

function  HHHasAmmo(var Hedgehog: THedgehog; Ammo: TAmmoType): boolean;

procedure PackAmmo(Ammo: PHHAmmo; Slot: LongInt);

procedure OnUsedAmmo(var Hedgehog: THedgehog);

procedure ApplyAngleBounds(var Hedgehog: THedgehog; AmmoType: TAmmoType);

procedure ApplyAmmoChanges(var Hedgehog: THedgehog);

procedure SwitchNotHeldAmmo(var Hedgehog: THedgehog);

procedure SetWeapon(weap: TAmmoType);

procedure DisableSomeWeapons;

var shoppa: boolean;

implementation

uses uMisc, uGears, uWorld, uLocale, uConsole;

type TAmmoCounts = array[TAmmoType] of Longword;

var StoresList: array[0..Pred(cMaxHHs)] of PHHAmmo;

    StoreCnt: Longword;

procedure FillAmmoStore(Ammo: PHHAmmo; var cnts: TAmmoCounts);

var mi: array[0..cMaxSlotIndex] of byte;

    a: TAmmoType;

begin

FillChar(mi, sizeof(mi), 0);

FillChar(Ammo^, sizeof(Ammo^), 0);

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

    if cnts[a] > 0 then

       begin

       TryDo(mi[Ammoz[a].Slot] <= cMaxSlotAmmoIndex, 'Ammo slot overflow', true);

       Ammo^[Ammoz[a].Slot, mi[Ammoz[a].Slot]]:= Ammoz[a].Ammo;

       Ammo^[Ammoz[a].Slot, mi[Ammoz[a].Slot]].Count:= cnts[a];

       inc(mi[Ammoz[a].Slot])

       end

end;

procedure AddAmmoStore(s: shortstring);

const probability: array [0..8] of LongWord = (0,20,30,60,100,150,200,400,600);

var cnt: Longword;

    a: TAmmoType;

    ammos: TAmmoCounts;

    substr: shortstring; // TEMPORARY

begin

TryDo(byte(s[0]) = byte(ord(High(TAmmoType))) * 2, 'Invalid ammo scheme (incompatible frontend)', true);

// FIXME - TEMPORARY hardcoded check on shoppa pending creation of crate *type* probability editor

substr:= Copy(s,1,15);

if (substr = '000000990000009') or 

   (substr = '000000990000000') then

    shoppa:= true;

inc(StoreCnt);

TryDo(StoreCnt <= cMaxHHs, 'Ammo stores overflow', true);

new(StoresList[Pred(StoreCnt)]);

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

    begin

    if a <> amNothing then

        begin

        Ammoz[a].Probability:= probability[byte(s[ord(a) + ord(High(TAmmoType))]) - byte('0')];

		if (TrainingFlags and tfIgnoreDelays) <> 0 then Ammoz[a].SkipTurns:= 0;

        cnt:= byte(s[ord(a)]) - byte('0');

        // avoid things we already have infinite number

        if cnt = 9 then

            begin

            cnt:= AMMO_INFINITE;

            Ammoz[a].Probability:= 0

            end;

        // avoid things we already have by scheme

        // merge this into DisableSomeWeapons ?

        if ((a = amLowGravity) and ((GameFlags and gfLowGravity) <> 0)) or

           ((a = amInvulnerable) and ((GameFlags and gfInvulnerable) <> 0)) or

           ((a = amLaserSight) and ((GameFlags and gfLaserSight) <> 0)) or

           ((a = amVampiric) and ((GameFlags and gfVampiric) <> 0)) then

            begin

            cnt:= 0;

            Ammoz[a].Probability:= 0

            end;

        ammos[a]:= cnt;

        if shoppa then Ammoz[a].NumberInCase:= 1;  // FIXME - TEMPORARY remove when crate number in case editor is added

        if ((GameFlags and gfKing) <> 0) and (Ammoz[a].SkipTurns = 0) and (a <> amTeleport) and (a <> amSkip) then 

            Ammoz[a].SkipTurns:= 1;

        end else

        ammos[a]:= AMMO_INFINITE

    end;

FillAmmoStore(StoresList[Pred(StoreCnt)], ammos)

end;

function GetAmmoByNum(num: Longword): PHHAmmo;

begin

TryDo(num < StoreCnt, 'Invalid store number', true);

exit(StoresList[num])

end;

procedure AssignStores;

var t: LongInt;

    i: Longword;

begin

for t:= 0 to Pred(TeamsCount) do

   with TeamsArray[t]^ do

      begin

      for i:= 0 to cMaxHHIndex do

          if Hedgehogs[i].Gear <> nil then

             Hedgehogs[i].Ammo:= GetAmmoByNum(Hedgehogs[i].AmmoStore);

      end

end;

procedure AddAmmo(var Hedgehog: THedgehog; ammo: TAmmoType);

var ammos: TAmmoCounts;

    slot, ami: LongInt;

    hhammo: PHHAmmo;

begin

FillChar(ammos, sizeof(ammos), 0);

hhammo:= Hedgehog.Ammo;

for slot:= 0 to cMaxSlotIndex do

    for ami:= 0 to cMaxSlotAmmoIndex do

        if hhammo^[slot, ami].Count > 0 then

           ammos[hhammo^[slot, ami].AmmoType]:= hhammo^[slot, ami].Count;

if ammos[ammo] <> AMMO_INFINITE then

   begin

   inc(ammos[ammo], Ammoz[ammo].NumberInCase);

   if ammos[ammo] > AMMO_INFINITE then ammos[ammo]:= AMMO_INFINITE

   end;

FillAmmoStore(hhammo, ammos)

end;

procedure PackAmmo(Ammo: PHHAmmo; Slot: LongInt);

var ami: LongInt;

    b: boolean;

begin

    repeat

      b:= false;

      ami:= 0;

      while (not b) and (ami < cMaxSlotAmmoIndex) do

          if (Ammo^[Slot, ami].Count = 0)

             and (Ammo^[Slot, ami + 1].Count > 0) then b:= true

                                                  else inc(ami);

      if b then // there is a free item in ammo stack

         begin

         Ammo^[Slot, ami]:= Ammo^[Slot, ami + 1];

         Ammo^[Slot, ami + 1].Count:= 0

         end;

    until not b;

end;

procedure OnUsedAmmo(var Hedgehog: THedgehog);

begin

with Hedgehog do

	begin

	MultiShootAttacks:= 0;

	with Ammo^[CurSlot, CurAmmo] do

		if Count <> AMMO_INFINITE then

			begin

			dec(Count);

			if Count = 0 then

				begin

				PackAmmo(Ammo, CurSlot);

				SwitchNotHeldAmmo(Hedgehog)

				end

			end

	end

end;

function  HHHasAmmo(var Hedgehog: THedgehog; Ammo: TAmmoType): boolean;

var slot, ami: LongInt;

begin

Slot:= Ammoz[Ammo].Slot;

ami:= 0;

while (ami <= cMaxSlotAmmoIndex) do

      begin

      with Hedgehog.Ammo^[Slot, ami] do

            if (AmmoType = Ammo) then

               exit((Count > 0) and (Hedgehog.Team^.Clan^.TurnNumber > Ammoz[AmmoType].SkipTurns));

      inc(ami)

      end;

HHHasAmmo:= false

end;

procedure ApplyAngleBounds(var Hedgehog: THedgehog; AmmoType: TAmmoType);

begin

with Hedgehog do

	begin

	CurMinAngle:= Ammoz[AmmoType].minAngle;

	if Ammoz[AmmoType].maxAngle <> 0 then

		CurMaxAngle:= Ammoz[AmmoType].maxAngle

	else

		CurMaxAngle:= cMaxAngle;

	with Hedgehog.Gear^ do

		begin

		if Angle < CurMinAngle then Angle:= CurMinAngle;

		if Angle > CurMaxAngle then Angle:= CurMaxAngle;

		end

	end

end;

procedure SwitchToFirstLegalAmmo(var Hedgehog: THedgehog);

begin

with Hedgehog do

	begin

	CurAmmo:= 0;

	CurSlot:= 0;

	while (CurSlot <= cMaxSlotIndex) and

		((Ammo^[CurSlot, CurAmmo].Count = 0) or

		(Ammoz[Ammo^[CurSlot, CurAmmo].AmmoType].SkipTurns - CurrentTeam^.Clan^.TurnNumber >= 0))

		do

		begin

		while (CurAmmo <= cMaxSlotAmmoIndex) and

			((Ammo^[CurSlot, CurAmmo].Count = 0) or

			(Ammoz[Ammo^[CurSlot, CurAmmo].AmmoType].SkipTurns - CurrentTeam^.Clan^.TurnNumber >= 0))

			do inc(CurAmmo);

		if (CurAmmo > cMaxSlotAmmoIndex) then

			begin

			CurAmmo:= 0;

			inc(CurSlot)

			end

		end;

	TryDo(CurSlot <= cMaxSlotIndex, 'Ammo slot index overflow', true)

	end

end;

procedure ApplyAmmoChanges(var Hedgehog: THedgehog);

var s: shortstring;

begin

TargetPoint.X:= NoPointX;

with Hedgehog do

	begin

	if (Ammo^[CurSlot, CurAmmo].Count = 0) then

		SwitchToFirstLegalAmmo(Hedgehog);

        //bad things could happen here in case CurSlot is overflowing

	ApplyAngleBounds(Hedgehog, Ammo^[CurSlot, CurAmmo].AmmoType);

	with Ammo^[CurSlot, CurAmmo] do

		begin

        if AmmoType <> amNothing then

            begin

		    s:= trammo[Ammoz[AmmoType].NameId];

		    if (Count <> AMMO_INFINITE) and not (Hedgehog.Team^.ExtDriven or (Hedgehog.BotLevel > 0)) then

			    s:= s + ' (' + IntToStr(Count) + ')';

		    if (Propz and ammoprop_Timerable) <> 0 then

			    s:= s + ', ' + inttostr(Timer div 1000) + ' ' + trammo[sidSeconds];

		    AddCaption(s, Team^.Clan^.Color, capgrpAmmoinfo);

            end;

		if (Propz and ammoprop_NeedTarget) <> 0

			then begin

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

			isCursorVisible:= true

			end else begin

			Gear^.State:= Gear^.State and not gstHHChooseTarget;

			isCursorVisible:= false

			end;

		ShowCrosshair:= (Propz and ammoprop_NoCrosshair) = 0

		end

	end

end;

procedure SwitchNotHeldAmmo(var Hedgehog: THedgehog);

begin

with Hedgehog do

	if ((Ammo^[CurSlot, CurAmmo].Propz and ammoprop_DontHold) <> 0) or

		(Ammoz[Ammo^[CurSlot, CurAmmo].AmmoType].SkipTurns - CurrentTeam^.Clan^.TurnNumber >= 0) then

		SwitchToFirstLegalAmmo(Hedgehog);

end;

procedure SetWeapon(weap: TAmmoType);

begin

ParseCommand('/setweap ' + char(weap), true)

end;

procedure DisableSomeWeapons;

var i, slot, a: Longword;

	t: TAmmoType;

begin

for i:= 0 to Pred(StoreCnt) do

	for slot:= 0 to cMaxSlotIndex do

		begin

		for a:= 0 to cMaxSlotAmmoIndex do

			with StoresList[i]^[slot, a] do

				if (Propz and ammoprop_NotBorder) <> 0 then Count:= 0;

		PackAmmo(StoresList[i], slot)

		end;

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

	if (Ammoz[t].Ammo.Propz and ammoprop_NotBorder) <> 0 then Ammoz[t].Probability:= 0

end;

procedure init_uAmmos;

begin

	shoppa:= false;

	StoreCnt:= 0

end;

procedure free_uAmmos;

var i: LongWord;

begin

	for i:= 0 to Pred(StoreCnt) do Dispose(StoresList[i]);

	StoreCnt:= 0

end;

end.