(*
 * Hedgewars, a worms-like game
 * Copyright (c) 2004, 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 uWorld;
interface
uses SDLh, uGears, uConsts;
{$INCLUDE options.inc}
const WorldDx: integer = -512;
      WorldDy: integer = -256;

procedure InitWorld;
procedure DrawWorld(Lag: integer; Surface: PSDL_Surface);
procedure AddCaption(s: string; Color: Longword; Group: TCapGroup);

{$IFDEF COUNTTICKS}
var cntTicks: LongWord;
{$ENDIF}
var FollowGear: PGear = nil;
    WindBarWidth: integer = 0;
    bShowAmmoMenu: boolean = false;
    bSelected: boolean = false;
    bShowFinger: boolean = false;
    Frames: Longword = 0;

implementation
uses uStore, uMisc, uTeams, uIO, uConsole, uKeys, uLocale, uSound;
const RealTicks: Longword = 0;
      FPS: Longword = 0;
      CountTicks: Longword = 0;
      SoundTimerTicks: Longword = 0;
      prevPoint: TPoint = (X: 0; Y: 0);

type TCaptionStr = record
                   Surf: PSDL_Surface;
                   EndTime: LongWord;
                   end;

var cWaterSprCount: integer;
    Captions: array[TCapGroup] of TCaptionStr;
    AMxLeft, AMxCurr, SlotsNum: integer;

procedure InitWorld;
begin
cWaterSprCount:= 1 + cScreenWidth div (SpritesData[sprWater].Width);
cScreenEdgesDist:= Min(cScreenWidth div 4, cScreenHeight div 4);
SDL_WarpMouse(cScreenWidth div 2, cScreenHeight div 2);
prevPoint.X:= cScreenWidth div 2;
prevPoint.Y:= cScreenHeight div 2;
WorldDx:=  - 1024 + cScreenWidth div 2;
WorldDy:=  - 512 + cScreenHeight div 2;
AMxLeft:= cScreenWidth - 210;
AMxCurr:= cScreenWidth
end;

procedure ShowAmmoMenu(Surface: PSDL_Surface);
const MENUSPEED = 15;
var x, y, i, t: integer;
    Slot, Pos: integer;
begin
if (TurnTimeLeft = 0) or KbdKeyPressed then bShowAmmoMenu:= false;
if bShowAmmoMenu then
   begin
   if AMxCurr = cScreenWidth then prevPoint.X:= 0;
   if AMxCurr > AMxLeft then dec(AMxCurr, MENUSPEED);
   end else
   begin
   if AMxCurr = AMxLeft then
      begin
      CursorPoint.X:= cScreenWidth div 2;
      CursorPoint.Y:= cScreenHeight div 2;
      prevPoint:= CursorPoint;
      SDL_WarpMouse(CursorPoint.X, CursorPoint.Y)
      end;
   if AMxCurr < cScreenWidth then inc(AMxCurr, MENUSPEED);
   end;

if CurrentTeam = nil then exit;
Slot:= 0;
Pos:= -1;
with CurrentTeam.Hedgehogs[CurrentTeam.CurrHedgehog] do
     begin
     if Ammo = nil then exit;
     SlotsNum:= 0;
     x:= AMxCurr;
     y:= cScreenHeight - 40;
     dec(y);
     DrawSprite(sprAMBorders, x, y, 0, Surface);
     dec(y);
     DrawSprite(sprAMBorders, x, y, 1, Surface);
     dec(y, 33);
     DrawSprite(sprAMSlotName, x, y, 0, Surface);
     for i:= cMaxSlotIndex downto 0 do
         if Ammo[i, 0].Count > 0 then
            begin
            if (CursorPoint.Y >= y - 33) and (CursorPoint.Y < y) then Slot:= i;
            dec(y, 33);
            inc(SlotsNum);
            DrawSprite(sprAMSlot, x, y, 0, Surface);
            DrawSprite(sprAMSlotKeys, x + 2, y + 1, i, Surface);
            t:= 0;
            while (t <= cMaxSlotAmmoIndex) and (Ammo[i, t].Count > 0) do
                  begin
                  DrawSprite(sprAMAmmos, x + t * 33 + 35, y + 1, integer(Ammo[i, t].AmmoType), Surface);
                  if (Slot = i) and (CursorPoint.X >= x + t * 33 + 35) and (CursorPoint.X < x + t * 33 + 68) then
                     begin
                     DrawSprite(sprAMSelection, x + t * 33 + 35, y + 1, 0, Surface);
                     Pos:= t;
                     end;
                  inc(t)
                  end
            end;
     dec(y, 1);
     DrawSprite(sprAMBorders, x, y, 0, Surface);

     if (Pos >= 0) then
        if Ammo[Slot, Pos].Count > 0 then
           begin
           DXOutText(AMxCurr + 10, cScreenHeight - 68, fnt16, trAmmo[Ammoz[Ammo[Slot, Pos].AmmoType].NameId], Surface);
           if Ammo[Slot, Pos].Count < 10 then
              DXOutText(AMxCurr + 175, cScreenHeight - 68, fnt16, chr(Ammo[Slot, Pos].Count + 48) + 'x', Surface);
           if bSelected then
              begin
              bShowAmmoMenu:= false;
              SetWeapon(Ammo[Slot, Pos].AmmoType);
              bSelected:= false;
              exit
              end;
           end;
     end;

bSelected:= false;
if AMxLeft = AMxCurr then DrawSprite(sprArrow, CursorPoint.X, CursorPoint.Y, (RealTicks shr 6) mod 8, Surface)
end;

procedure MoveCamera; forward;

procedure DrawWorld(Lag: integer; Surface: PSDL_Surface);
var i, t: integer;
    r: TSDL_Rect;
    team: PTeam;
    tdx, tdy: Double;
    grp: TCapGroup;
    s: string[15];

    procedure DrawRepeated(spr: TSprite; Shift: integer);
    var i, w: integer;
    begin
    w:= SpritesData[spr].Width;
    i:= Shift mod w;
    if i > 0 then dec(i, w);
    repeat
      DrawSprite(spr, i, WorldDy + 1024 - SpritesData[spr].Height, 0, Surface);
      inc(i, w)
    until i > cScreenWidth
    end;

begin
MoveCamera;

// Sky
inc(RealTicks, Lag);
if WorldDy > 0 then
   begin
   if WorldDy > cScreenHeight then r.h:= cScreenHeight
                              else r.h:= WorldDy;
   r.x:= 0;
   r.y:= 0;
   r.w:= cScreenWidth;
   SDL_FillRect(Surface, @r, cSkyColor)
   end;
// background
DrawRepeated(sprSky, WorldDx * 3 div 8);
DrawRepeated(sprHorizont, WorldDx * 3 div 5);

// Waves
{$WARNINGS OFF}
for i:= -1 to cWaterSprCount do DrawSprite(sprWater,  i * 256  + ((WorldDx + (RealTicks shr 6)      ) and $FF), cWaterLine + WorldDy - 64, 0, Surface);
for i:= -1 to cWaterSprCount do DrawSprite(sprWater,  i * 256  + ((WorldDx - (RealTicks shr 6) + 192) and $FF), cWaterLine + WorldDy - 48, 0, Surface);
{$WARNINGS ON}

DrawLand(WorldDx, WorldDy, Surface);
// Water
r.y:= WorldDy + cWaterLine + 32;
if r.y < cScreenHeight then
   begin
   if r.y < 0 then r.y:= 0;
   r.h:= cScreenHeight - r.y;
   r.x:= 0;
   r.w:= cScreenWidth;
   SDL_FillRect(Surface, @r, cWaterColor)
   end;

DrawGears(Surface);

if CurrentTeam <> nil then
   begin
   team:= TeamsList;
   while team<>nil do
      begin
      for i:= 0 to 7 do
          with team.Hedgehogs[i] do
               if Gear<>nil then
                  if Gear.State = 0 then
                     begin
                     t:= round(Gear.Y) - cHHRadius - 10 + WorldDy;
                     dec(t, HealthTag.h + 2);
                     DrawCentered(round(Gear.X) + WorldDx, t, HealthTag, Surface);
                     dec(t, NameTag.h + 2);
                     DrawCentered(round(Gear.X) + WorldDx, t, NameTag, Surface);
                     dec(t, Team.NameTag.h + 2);
                     DrawCentered(round(Gear.X) + WorldDx, t, Team.NameTag, Surface)
                     end else // Current hedgehog
                     begin
                     if bShowFinger
                        and ((Gear.State and gstHHDriven) <> 0) then DrawSprite(sprFinger, round(Gear.X) - 16 + WorldDx, round(Gear.Y) - 64 + WorldDy, RealTicks div 32 mod 16, Surface);
                     if (Gear.State and (gstMoving or gstDrowning or gstFalling)) = 0 then
                        if (Gear.State and gstHHThinking) <> 0 then
                           DrawGear(sQuestion, Round(Gear.X) - 10 + WorldDx, Round(Gear.Y) - cHHRadius - 34 + WorldDy, Surface)
                        else
                        if ShowCrosshair and ((Gear.State and gstAttacked) = 0) then
                           DrawSurfSprite(Round(Gear.X + hwSign(Gear.dX) * Sin(Gear.Angle*pi/cMaxAngle)*60) + WorldDx - 8,
                                          Round(Gear.Y - Cos(Gear.Angle*pi/cMaxAngle)*60) + WorldDy - 12,
                                          24, (18 + hwSign(Gear.dX) * integer(((Gear.Angle * 72 div cMaxAngle) + 1) div 2) mod 18) mod 18,
                                          Team.CrosshairSurf, Surface);
                     end;
      team:= team.Next
      end;
   end;


// Waves
{$WARNINGS OFF}
for i:= -1 to cWaterSprCount do DrawSprite(sprWater,  i * 256  + ((WorldDx + (RealTicks shr 6) +  64) and $FF), cWaterLine + WorldDy - 32, 0, Surface);
for i:= -1 to cWaterSprCount do DrawSprite(sprWater,  i * 256  + ((WorldDx - (RealTicks shr 6) + 128) and $FF), cWaterLine + WorldDy - 16, 0, Surface);
for i:= -1 to cWaterSprCount do DrawSprite(sprWater,  i * 256  + ((WorldDx + (RealTicks shr 6)      ) and $FF), cWaterLine + WorldDy     , 0, Surface);
{$WARNINGS ON}

// Turn time
if TurnTimeLeft <> 0 then
   begin
   i:= Succ(Pred(TurnTimeLeft) div 1000);
   if i>99 then t:= 112
      else if i>9 then t:= 96
                  else t:= 80;
   DrawSprite(sprFrame, t, cScreenHeight - 48, 1, Surface);
   while i > 0 do
         begin
         dec(t, 32);
         DrawSprite(sprBigDigit, t, cScreenHeight - 48, i mod 10, Surface);
         i:= i div 10
         end;
   DrawSprite(sprFrame, t - 4, cScreenHeight - 48, 0, Surface);
   end;

// Attack bar
if CurrentTeam <> nil then
   case AttackBar of
        1: begin
           r:= StuffPoz[sPowerBar];
           {$WARNINGS OFF}
           r.w:= (CurrentTeam.Hedgehogs[CurrentTeam.CurrHedgehog].Gear.Power * 256) div cPowerDivisor;
           {$WARNINGS ON}
           DrawSpriteFromRect(r, cScreenWidth - 272, cScreenHeight - 48, 16, 0, Surface);
           end;
        2: with CurrentTeam.Hedgehogs[CurrentTeam.CurrHedgehog] do
                begin
                tdx:= hwSign(Gear.dX) * Sin(Gear.Angle*pi/cMaxAngle);
                tdy:= - Cos(Gear.Angle*pi/cMaxAngle);
                for i:= (Gear.Power * 24) div cPowerDivisor downto 0 do
                    DrawSprite(sprPower, round(Gear.X + WorldDx + tdx * (24 + i * 2)) - 16,
                                         round(Gear.Y + WorldDy + tdy * (24 + i * 2)) - 12,
                                         i, Surface)
                end
        end;

// Target
if TargetPoint.X <> NoPointX then DrawSprite(sprTargetP, TargetPoint.X + WorldDx - 16, TargetPoint.Y + WorldDy - 16, 0, Surface);

// Captions
i:= 8;
for grp:= Low(TCapGroup) to High(TCapGroup) do
    with Captions[grp] do
         if EndTime > 0 then
            begin
            DrawCentered(cScreenWidth div 2, i + cConsoleYAdd, Surf, Surface);
            inc(i, Surf.h + 2);
            if EndTime <= RealTicks then
               begin
               SDL_FreeSurface(Surf);
               Surf:= nil;
               EndTime:= 0
               end
            end;

// Teams Healths
team:= TeamsList;
while team <> nil do
      begin
      r.x:= cScreenWidth div 2 - team.NameTag.w - 3;
      r.y:= team.DrawHealthY;
      r.w:= team.NameTag.w;
      r.h:= team.NameTag.h;
      SDL_UpperBlit(team.NameTag, nil, Surface, @r);
      r:= team.HealthRect;
      r.w:= 2 + team.TeamHealthBarWidth;
      DrawFromStoreRect(cScreenWidth div 2,
                        Team.DrawHealthY,
                        @r, Surface);
      inc(r.x, cTeamHealthWidth + 2);
      r.w:= 3;
      DrawFromStoreRect(cScreenWidth div 2 + team.TeamHealthBarWidth + 2,
                        Team.DrawHealthY,
                        @r, Surface);
      team:= team.Next
      end;

// Lag alert
if isInLag then DrawSprite(sprLag, 32, 32  + cConsoleYAdd, (RealTicks shr 7) mod 7, Surface);

// Wind bar
DrawGear(sWindBar, cScreenWidth - 180, cScreenHeight - 30, Surface);
if WindBarWidth > 0 then
   begin
   with StuffPoz[sWindR] do
        begin
        {$WARNINGS OFF}
        r.x:= x + 8 - (RealTicks shr 6) mod 8;
        {$WARNINGS ON}
        r.y:= y;
        r.w:= WindBarWidth;
        r.h:= 13;
        end;
   DrawSpriteFromRect(r, cScreenWidth - 103, cScreenHeight - 28, 13, 0, Surface);
   end else
 if WindBarWidth < 0 then
   begin
   with StuffPoz[sWindL] do
        begin
        {$WARNINGS OFF}
        r.x:= x + (WindBarWidth + RealTicks shr 6) mod 8;
        {$WARNINGS ON}
        r.y:= y;
        r.w:= - WindBarWidth;
        r.h:= 13;
        end;
   DrawSpriteFromRect(r, cScreenWidth - 106 + WindBarWidth, cScreenHeight - 28, 13, 0, Surface);
   end;

// AmmoMenu
if (AMxCurr < cScreenWidth) or bShowAmmoMenu then ShowAmmoMenu(Surface);

// Cursor
if isCursorVisible then DrawSprite(sprArrow, CursorPoint.X, CursorPoint.Y, (RealTicks shr 6) mod 8, Surface);

{$IFDEF COUNTTICKS}
DXOutText(10, 10, fnt16, inttostr(cntTicks), Surface);
{$ENDIF}

inc(Frames);
inc(CountTicks, Lag);
if CountTicks >= 1000 then
   begin
   FPS:= Frames;
   Frames:= 0;
   CountTicks:= 0;
   end;
if cShowFPS then DXOutText(cScreenWidth - 50, 10, fnt16, inttostr(FPS) + ' fps', Surface);

inc(SoundTimerTicks, Lag);
if SoundTimerTicks >= 50 then
   begin
   SoundTimerTicks:= 0;
   if cVolumeDelta <> 0 then
      begin
      str(ChangeVolume(cVolumeDelta), s);
      AddCaption(Format(trmsg[sidVolume], s), $FFFFFF, capgrpVolume)
      end
   end
end;

procedure AddCaption(s: string; Color: Longword; Group: TCapGroup);
begin
if Group in [capgrpGameState, capgrpNetSay] then WriteLnToConsole(s);
if Captions[Group].Surf <> nil then SDL_FreeSurface(Captions[Group].Surf);

Captions[Group].Surf:= RenderString(s, Color, fntBig);
Captions[Group].EndTime:= RealTicks + 1200
end;

procedure MoveCamera;
const PrevSentPointTime: LongWord = 0;
begin
if not (CurrentTeam.ExtDriven and isCursorVisible) then SDL_GetMouseState(@CursorPoint.X, @CursorPoint.Y);
if (FollowGear <> nil) then
   if abs(CursorPoint.X - prevPoint.X) + abs(CursorPoint.Y - prevpoint.Y) > 4 then
      begin
      FollowGear:= nil;
      exit
      end
      else begin
      CursorPoint.x:= (CursorPoint.x * 7 + (round(FollowGear.X + hwSign(FollowGear.dX) * 100) + WorldDx)) div 8;
      CursorPoint.y:= (CursorPoint.y * 7 + (round(FollowGear.Y) + WorldDy)) div 8
      end;

if ((CursorPoint.X = prevPoint.X)and(CursorPoint.Y = prevpoint.Y)) then exit;

if AMxCurr < cScreenWidth then
   begin
   if CursorPoint.X < AMxCurr + 35 then CursorPoint.X:= AMxCurr + 35;
   if CursorPoint.X > AMxCurr + 200 then CursorPoint.X:= AMxCurr + 200;
   if CursorPoint.Y < cScreenHeight - 75 - SlotsNum * 33 then CursorPoint.Y:= cScreenHeight - 75 - SlotsNum * 33;
   if CursorPoint.Y > cScreenHeight - 76 then CursorPoint.Y:= cScreenHeight - 76;
   prevPoint:= CursorPoint;
   SDL_WarpMouse(CursorPoint.X, CursorPoint.Y);
   exit
   end;

if isCursorVisible then
   begin
   if (not CurrentTeam.ExtDriven)and(GameTicks >= PrevSentPointTime + cSendCursorPosTime) then
      begin
      SendIPCXY('P', CursorPoint.X - WorldDx, CursorPoint.Y - WorldDy);
      PrevSentPointTime:= GameTicks
      end;
   end;
if isCursorVisible or (FollowGear <> nil) then
   begin
   if CursorPoint.X < cScreenEdgesDist then
         begin
         WorldDx:= WorldDx - CursorPoint.X + cScreenEdgesDist;
         CursorPoint.X:= cScreenEdgesDist
         end else
      if CursorPoint.X > cScreenWidth - cScreenEdgesDist then
         begin
         WorldDx:= WorldDx - CursorPoint.X + cScreenWidth - cScreenEdgesDist;
         CursorPoint.X:= cScreenWidth - cScreenEdgesDist
         end;
      if CursorPoint.Y < cScreenEdgesDist then
         begin
         WorldDy:= WorldDy - CursorPoint.Y + cScreenEdgesDist;
         CursorPoint.Y:= cScreenEdgesDist
         end else
      if CursorPoint.Y > cScreenHeight - cScreenEdgesDist then
         begin
         WorldDy:= WorldDy - CursorPoint.Y + cScreenHeight - cScreenEdgesDist;
         CursorPoint.Y:= cScreenHeight - cScreenEdgesDist
         end;
   end else
   begin
      WorldDx:= WorldDx - CursorPoint.X + prevPoint.X;
      WorldDy:= WorldDy - CursorPoint.Y + prevPoint.Y;
      CursorPoint.X:= (cScreenWidth  shr 1);
      CursorPoint.Y:= (cScreenHeight shr 1);
   end;
SDL_WarpMouse(CursorPoint.X, CursorPoint.Y);
prevPoint:= CursorPoint;
if WorldDy < cScreenHeight - cWaterLine - cVisibleWater then WorldDy:= cScreenHeight - cWaterLine - cVisibleWater;
if WorldDy >  2048 then WorldDy:=  2048;
if WorldDx < -2048 then WorldDx:= -2048;
if WorldDx > cScreenWidth then WorldDx:=  cScreenWidth;
end;

initialization
FillChar(Captions, sizeof(Captions), 0)

end.