(*

 * 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"}

{$IFDEF WIN32}

{$R hwengine.rc}

{$ENDIF}

{$IFDEF HWLIBRARY}

unit hwengine;

interface

{$ELSE}

program hwengine;

{$ENDIF}

uses SDLh, uMisc, uConsole, uGame, uConsts, uLand, uAmmos, uVisualGears, uGears, uStore, uWorld, uInputHandler,

     uSound, uScript, uTeams, uStats, uIO, uLocale, uChat, uAI, uAIMisc, uAILandMarks, uLandTexture, uCollisions,

     SysUtils, uTypes, uVariables, uCommands, uUtils, uCaptions, uDebug, uCommandHandlers, uLandPainted

     {$IFDEF USE_VIDEO_RECORDING}, uVideoRec {$ENDIF}

     {$IFDEF USE_TOUCH_INTERFACE}, uTouch {$ENDIF}

     {$IFDEF ANDROID}, GLUnit{$ENDIF}

     ;

{$IFDEF HWLIBRARY}

procedure initEverything(complete:boolean);

procedure freeEverything(complete:boolean);

procedure Game(gameArgs: PPChar); cdecl; export;

procedure GenLandPreview(port: Longint); cdecl; export;

implementation

{$ELSE}

procedure initEverything(complete:boolean); forward;

procedure freeEverything(complete:boolean); forward;

{$ENDIF}

////////////////////////////////////////////////////////////////////////////////

function DoTimer(Lag: LongInt): boolean;

var s: shortstring;

begin

    DoTimer:= false;

    inc(RealTicks, Lag);

    case GameState of

        gsLandGen:

            begin

            GenMap;

            SetLandTexture;

            UpdateLandTexture(0, LAND_WIDTH, 0, LAND_HEIGHT, false);

            setAILandMarks;

            ParseCommand('sendlanddigest', true);

            GameState:= gsStart;

            end;

        gsStart:

            begin

            if HasBorder then

                DisableSomeWeapons;

            AddClouds;

            AddFlakes;

            AssignHHCoords;

            AddMiscGears;

            StoreLoad(false);

            InitWorld;

            ResetKbd;

            if GameType = gmtSave then

                SetSound(false);

            FinishProgress;

            PlayMusic;

            SetScale(zoom);

            ScriptCall('onGameStart');

            GameState:= gsGame;

            end;

        gsConfirm, gsGame:

            begin

            DrawWorld(Lag);

            DoGameTick(Lag);

            ProcessVisualGears(Lag);

            end;

        gsChat:

            begin

            DrawWorld(Lag);

            DoGameTick(Lag);

            ProcessVisualGears(Lag);

            end;

        gsExit:

            begin

            DoTimer:= true;

            end;

        gsSuspend:

            exit(false);

            end;

    SwapBuffers;

{$IFDEF USE_VIDEO_RECORDING}

    if flagPrerecording then

        SaveCameraPosition;

{$ENDIF}

    if flagMakeCapture then

        begin

        flagMakeCapture:= false;

        {$IFDEF PAS2C}

        s:= '/Screenshots/hw';

        {$ELSE}

        s:= '/Screenshots/hw_' + FormatDateTime('YYYY-MM-DD_HH-mm-ss', Now()) + inttostr(GameTicks);

        {$ENDIF}

        // flash

        playSound(sndShutter);

        ScreenFade:= sfFromWhite;

        ScreenFadeValue:= sfMax;

        ScreenFadeSpeed:= 5;

        if MakeScreenshot(s, 1) then

            WriteLnToConsole('Screenshot saved: ' + s)

        else

            begin

            WriteLnToConsole('Screenshot failed.');

            AddChatString(#5 + 'screen capture failed (lack of memory or write permissions)');

            end

        end;

end;

////////////////////////////////////////////////////////////////////////////////

procedure MainLoop;

var event: TSDL_Event;

    PrevTime, CurrTime: Longword;

    isTerminated: boolean;

{$IFDEF SDL13}

    previousGameState: TGameState;

{$ELSE}

    prevFocusState: boolean;

{$ENDIF}

begin

    isTerminated:= false;

    PrevTime:= SDL_GetTicks;

    while isTerminated = false do

    begin

        SDL_PumpEvents();

        while SDL_PeepEvents(@event, 1, SDL_GETEVENT, {$IFDEF SDL13}SDL_FIRSTEVENT, SDL_LASTEVENT{$ELSE}SDL_ALLEVENTS{$ENDIF}) > 0 do

        begin

            case event.type_ of

{$IFDEF SDL13}

                SDL_KEYDOWN:

                    if GameState = gsChat then

                    // sdl on iphone supports only ashii keyboards and the unicode field is deprecated in sdl 1.3

                        KeyPressChat(SDL_GetKeyFromScancode(event.key.keysym.sym))//TODO correct for keymodifiers

                    else

                        ProcessKey(event.key);

                SDL_KEYUP:

                    if GameState <> gsChat then

                        ProcessKey(event.key);

                SDL_WINDOWEVENT:

                    if event.window.event = SDL_WINDOWEVENT_SHOWN then

                    begin

                        cHasFocus:= true;

                        onFocusStateChanged()

                    end

                    else if event.window.event = SDL_WINDOWEVENT_MINIMIZED then

                    begin

                        previousGameState:= GameState;

                        GameState:= gsSuspend;

                    end

                    else if event.window.event = SDL_WINDOWEVENT_RESTORED then

                    begin

                        GameState:= previousGameState;

{$IFDEF ANDROID}

                        //This call is used to reinitialize the glcontext and reload the textures

                        ParseCommand('fullscr '+intToStr(LongInt(cFullScreen)), true);

{$ENDIF}

                    end

                    else if event.window.event = SDL_WINDOWEVENT_RESIZED then

                    begin

                        cNewScreenWidth:= max(2 * (event.window.data1 div 2), cMinScreenWidth);

                        cNewScreenHeight:= max(2 * (event.window.data2 div 2), cMinScreenHeight);

                        cScreenResizeDelay:= RealTicks + 500{$IFDEF IPHONEOS}div 2{$ENDIF};

                    end;

                SDL_FINGERMOTION:

                    onTouchMotion(event.tfinger.x, event.tfinger.y,event.tfinger.dx, event.tfinger.dy, event.tfinger.fingerId);

                SDL_FINGERDOWN:

                    onTouchDown(event.tfinger.x, event.tfinger.y, event.tfinger.fingerId);

                SDL_FINGERUP:

                    onTouchUp(event.tfinger.x, event.tfinger.y, event.tfinger.fingerId);

{$ELSE}

                SDL_KEYDOWN:

                    if GameState = gsChat then

                        KeyPressChat(event.key.keysym.unicode)

                    else

                        ProcessKey(event.key);

                SDL_KEYUP:

                    if GameState <> gsChat then

                        ProcessKey(event.key);

                SDL_MOUSEBUTTONDOWN:

                    ProcessMouse(event.button, true);

                SDL_MOUSEBUTTONUP:

                    ProcessMouse(event.button, false); 

                SDL_ACTIVEEVENT:

                    if (event.active.state and SDL_APPINPUTFOCUS) <> 0 then

                    begin

                        prevFocusState:= cHasFocus;

                        cHasFocus:= event.active.gain = 1;

                        if prevFocusState xor cHasFocus then

                            onFocusStateChanged()

                    end;

                SDL_VIDEORESIZE:

                begin

                    // using lower values than cMinScreenWidth or cMinScreenHeight causes widget overlap and off-screen widget parts

                    // Change by sheepluva:

                    // Let's only use even numbers for custom width/height since I ran into scaling issues with odd width values.

                    // Maybe just fixes the symptom not the actual cause(?), I'm too tired to find out :P

                    cNewScreenWidth:= max(2 * (event.resize.w div 2), cMinScreenWidth);

                    cNewScreenHeight:= max(2 * (event.resize.h div 2), cMinScreenHeight);

                    cScreenResizeDelay:= RealTicks+500;

                end;

{$ENDIF}

                SDL_JOYAXISMOTION:

                    ControllerAxisEvent(event.jaxis.which, event.jaxis.axis, event.jaxis.value);

                SDL_JOYHATMOTION:

                    ControllerHatEvent(event.jhat.which, event.jhat.hat, event.jhat.value);

                SDL_JOYBUTTONDOWN:

                    ControllerButtonEvent(event.jbutton.which, event.jbutton.button, true);

                SDL_JOYBUTTONUP:

                    ControllerButtonEvent(event.jbutton.which, event.jbutton.button, false);

                SDL_QUITEV:

                    isTerminated:= true

            end; //end case event.type_ of

        end; //end while SDL_PollEvent(@event) <> 0 do

        if (cScreenResizeDelay <> 0) and (cScreenResizeDelay < RealTicks) and

           ((cNewScreenWidth <> cScreenWidth) or (cNewScreenHeight <> cScreenHeight)) then

        begin

            cScreenResizeDelay:= 0;

            cScreenWidth:= cNewScreenWidth;

            cScreenHeight:= cNewScreenHeight;

            ParseCommand('fullscr '+intToStr(LongInt(cFullScreen)), true);

            WriteLnToConsole('window resize: ' + IntToStr(cScreenWidth) + ' x ' + IntToStr(cScreenHeight));

            ScriptOnScreenResize();

            InitCameraBorders();

            InitTouchInterface();

        end;

        CurrTime:= SDL_GetTicks();

        if PrevTime + longword(cTimerInterval) <= CurrTime then

        begin

            isTerminated:= DoTimer(CurrTime - PrevTime);

            PrevTime:= CurrTime

        end

        else SDL_Delay(1);

        IPCCheckSock();

    end;

end;

{$IFDEF USE_VIDEO_RECORDING}

procedure RecorderMainLoop;

var oldGameTicks, oldRealTicks, newGameTicks, newRealTicks: LongInt;

begin

    if not BeginVideoRecording() then

        exit;

    DoTimer(0); // gsLandGen -> gsStart

    DoTimer(0); // gsStart -> gsGame

    if not LoadNextCameraPosition(newRealTicks, newGameTicks) then

        exit;

    fastScrolling:= true;

    DoGameTick(newGameTicks);

    fastScrolling:= false;

    oldRealTicks:= 0;

    oldGameTicks:= newGameTicks;

    while LoadNextCameraPosition(newRealTicks, newGameTicks) do

    begin

        IPCCheckSock();

        DoGameTick(newGameTicks - oldGameTicks);

        if GameState = gsExit then

            break;

        ProcessVisualGears(newRealTicks - oldRealTicks);

        DrawWorld(newRealTicks - oldRealTicks);

        EncodeFrame();

        oldRealTicks:= newRealTicks;

        oldGameTicks:= newGameTicks;

    end;

    StopVideoRecording();

end;

{$ENDIF}

////////////////////////////////////////////////////////////////////////////////

procedure Game{$IFDEF HWLIBRARY}(gameArgs: PPChar); cdecl; export{$ENDIF};

var p: TPathType;

    s: shortstring;

    i: LongInt;

begin

{$IFDEF HWLIBRARY}

    initEverything(true);

    cShowFPS:= {$IFDEF DEBUGFILE}true{$ELSE}false{$ENDIF};

    ipcPort:= StrToInt(gameArgs[0]);

    cScreenWidth:= StrToInt(gameArgs[1]);

    cScreenHeight:= StrToInt(gameArgs[2]);

    cReducedQuality:= StrToInt(gameArgs[3]);

    cLocaleFName:= gameArgs[4];

    // cFullScreen functionality is platform dependent, ifdef it if you need to modify it

    cFullScreen:= false;

    if (Length(cLocaleFName) > 6) then

        cLocale := Copy(cLocaleFName,1,5)

    else

        cLocale := Copy(cLocaleFName,1,2);

    UserNick:= gameArgs[5];

    SetSound(gameArgs[6] = '1');

    SetMusic(gameArgs[7] = '1');

    cAltDamage:= gameArgs[8] = '1';

    PathPrefix:= gameArgs[9];

    UserPathPrefix:= '../Documents';

    recordFileName:= gameArgs[10];

    cStereoMode:= smNone;

{$ENDIF}

    cMinScreenWidth:= min(cScreenWidth, cMinScreenWidth);

    cMinScreenHeight:= min(cScreenHeight, cMinScreenHeight);

    cOrigScreenWidth:= cScreenWidth;

    cOrigScreenHeight:= cScreenHeight;

    WriteLnToConsole('Hedgewars ' + cVersionString + ' engine (network protocol: ' + inttostr(cNetProtoVersion) + ')');

    AddFileLog('Prefix: "' + PathPrefix +'"');

    AddFileLog('UserPrefix: "' + UserPathPrefix +'"');

    for i:= 0 to ParamCount do

        AddFileLog(inttostr(i) + ': ' + ParamStr(i));

    for p:= Succ(Low(TPathType)) to High(TPathType) do

        if (p <> ptMapCurrent) and (p <> ptData) then

            UserPathz[p]:= UserPathPrefix + '/Data/' + Pathz[p];

    UserPathz[ptData]:= UserPathPrefix + '/Data';

    for p:= Succ(Low(TPathType)) to High(TPathType) do

        if p <> ptMapCurrent then

            Pathz[p]:= PathPrefix + '/' + Pathz[p];

    WriteToConsole('Init SDL... ');

    SDLTry(SDL_Init(SDL_INIT_VIDEO or SDL_INIT_NOPARACHUTE) >= 0, true);

    WriteLnToConsole(msgOK);

    SDL_EnableUNICODE(1);

    SDL_ShowCursor(0);

    WriteToConsole('Init SDL_ttf... ');

    SDLTry(TTF_Init() <> -1, true);

    WriteLnToConsole(msgOK);

{$IFDEF USE_VIDEO_RECORDING}

    if GameType = gmtRecord then

        InitOffscreenOpenGL()

    else

{$ENDIF}

        begin            

        // show main window

        if cFullScreen then

            ParseCommand('fullscr 1', true)

        else

            ParseCommand('fullscr 0', true);

        end;

    ControllerInit(); // has to happen before InitKbdKeyTable to map keys

    InitKbdKeyTable();

    AddProgress();

    LoadLocale(UserPathz[ptLocale] + '/en.txt');  // Do an initial load with english

    LoadLocale(Pathz[ptLocale] + '/en.txt');  // Do an initial load with english

    if cLocaleFName <> 'en.txt' then

        begin

        // Try two letter locale first before trying specific locale overrides

        if (Length(cLocale) > 2) and (Copy(cLocale,1,2) <> 'en') then

            begin

            LoadLocale(UserPathz[ptLocale] + '/' + Copy(cLocale,1,2)+'.txt');

            LoadLocale(Pathz[ptLocale] + '/' + Copy(cLocale,1,2)+'.txt')

            end;

        LoadLocale(UserPathz[ptLocale] + '/' + cLocaleFName);

        LoadLocale(Pathz[ptLocale] + '/' + cLocaleFName)

        end

    else cLocale := 'en';

    WriteLnToConsole(msgGettingConfig);

    if recordFileName = '' then

        begin

        InitIPC;

        SendIPCAndWaitReply(_S'C');        // ask for game config

        end

    else

        LoadRecordFromFile(recordFileName);

    ScriptOnGameInit;

    s:= 'eproto ' + inttostr(cNetProtoVersion);

    SendIPCRaw(@s[0], Length(s) + 1); // send proto version

    InitTeams();

    AssignStores();

    if GameType = gmtRecord then

        SetSound(false);

    InitSound();

    isDeveloperMode:= false;

    TryDo(InitStepsFlags = cifAllInited, 'Some parameters not set (flags = ' + inttostr(InitStepsFlags) + ')', true);

    ParseCommand('rotmask', true);

{$IFDEF USE_VIDEO_RECORDING}

    if GameType = gmtRecord then

        RecorderMainLoop()

    else

{$ENDIF}

        MainLoop();

    // clean up all the memory allocated

    freeEverything(true);

end;

////////////////////////////////////////////////////////////////////////////////

// As a rule of thumb, every module that is listed in either initEverything or 

// freeEverything should come in pair, even if they are stubs. Only use this 

// section for inialising variables and remeber that game args overwrite these,

// so handle this section with care. Pay attention to the init/free order too! 

procedure initEverything (complete:boolean);

begin

    Randomize();

    uUtils.initModule(complete);    // opens the debug file, must be the first

    uVariables.initModule;          // inits all global variables

    uConsole.initModule;            // opens stdout

    uCommands.initModule;           // helps below

    uCommandHandlers.initModule;    // registers all messages from frontend

    uLand.initModule;               // computes land

    uLandPainted.initModule;        // computes drawn land

    uIO.initModule;                 // sets up sockets

    if complete then

    begin

{$IFDEF ANDROID}GLUnit.initModule;{$ENDIF}

{$IFDEF USE_TOUCH_INTERFACE}uTouch.initModule;{$ENDIF}

{$IFDEF USE_VIDEO_RECORDING}uVideoRec.initModule;{$ENDIF}   //stub

        uAI.initModule;

        uAIMisc.initModule;

        uAILandMarks.initModule;    //stub

        uAmmos.initModule;

        uCaptions.initModule;

        uChat.initModule;

        uCollisions.initModule;

        uGears.initModule;

        uInputHandler.initModule;   //stub