(*

 * 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, uLandTexture, uCollisions,

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

     uLandPainted, uFloat, uPhysFSLayer

     {$IFDEF USE_VIDEO_RECORDING}, uVideoRec {$ENDIF}

     {$IFDEF USE_TOUCH_INTERFACE}, uTouch {$ENDIF}

     {$IFDEF ANDROID}, GLUnit{$ENDIF}

     {$IFDEF WEBGL}, uWeb{$ENDIF}

     ;

{$IFDEF HWLIBRARY}

procedure preInitEverything();

procedure initEverything(complete:boolean);

procedure freeEverything(complete:boolean);

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

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

implementation

{$ELSE}

procedure preInitEverything(); forward;

procedure initEverything(complete:boolean); forward;

procedure freeEverything(complete:boolean); forward;

{$ENDIF}

{$IFDEF WEBGL}

procedure playFile(path: PChar); forward;

function isEngineRunning():Integer; forward;

procedure shutdown();forward;

function getRealTicks():Integer; forward;

procedure mainhook(); forward;

var

    args: array[0..3] of PChar;

    PrevTime, CurrTime: LongInt;

    isTerminated: boolean;

    prevFocusState: boolean;

    isRunning : boolean;

{$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

            if not cOnlyStats then

{$IFDEF WEBGL}

                drawworld_hook();

{$ELSE}

                // never place between ProcessKbd and DoGameTick - bugs due to /put cmd and isCursorVisible

                DrawWorld(Lag);

{$ENDIF}

            DoGameTick(Lag);

            if not cOnlyStats then ProcessVisualGears(Lag);

            end;

        gsChat:

            begin

            if not cOnlyStats then DrawWorld(Lag);

            DoGameTick(Lag);

            if not cOnlyStats then ProcessVisualGears(Lag);

            end;

        gsExit:

            begin

            DoTimer:= true;

            end;

        gsSuspend:

            exit(false);

            end;

    if not cOnlyStats then 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;

{$IFNDEF WEBGL}

    PrevTime, CurrTime: LongInt;

    isTerminated: boolean;

{$IFDEF SDL13}

    previousGameState: TGameState;

{$ELSE}

    prevFocusState: boolean;

{$ENDIF}

{$ENDIF}

begin

{$IFNDEF WEBGL}

    isTerminated:= false;

    PrevTime:= SDL_GetTicks;

    while isTerminated = false do

    begin

{$ENDIF}

        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:= isTerminated or DoTimer(CurrTime - PrevTime);

            PrevTime:= CurrTime;

            {$IFDEF WEBGL}

            if not isTerminated then

                mainloop_hook();

            else

            begin

                freeEverything(true);

                isRunning := false;

            end

            {$ENDIF}

        end

        else {$IFNDEF WEBGL}SDL_Delay(1){$ELSE}mainloop_hook(){$ENDIF};

        IPCCheckSock();

{$IFNDEF WEBGL}

    end;

{$ENDIF}

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;

{$IFDEF WEBGL}

    l:TResourceList;

{$ENDIF}

begin

{$IFDEF HWLIBRARY}

    preInitEverything();

    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];

    UserNick:= gameArgs[5];

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

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

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

    PathPrefix:= gameArgs[9];

    UserPathPrefix:= '../Documents';

    recordFileName:= gameArgs[10];

{$ENDIF}

    initEverything(true);

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

    for i:= 0 to ParamCount do

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

    WriteToConsole('Init SDL... ');

    if not cOnlyStats then 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(cPathz[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) > 3) and (Copy(cLocale, 1, 2) <> 'en') then

            begin

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

            end;

        LoadLocale(cPathz[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

    begin

        RecorderMainLoop();

        freeEverything(true);

        exit;

    end;

{$ENDIF}

{$IFDEF WEBGL}

    l := generateResourceList();

    clear_filelist_hook();

    for i:= 0 to l.count - 1 do

    add_file_hook(PChar(l.files[i] + '.png'));

    isTerminated := false;

    isRunning := true;

    PrevTime := SDL_GetTicks();

    idb_loader_hook();

{$ELSE}

    MainLoop;

    // clean up all the memory allocated

    freeEverything(true);

{$ENDIF}

end;