(*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2004-2014 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 *)

{$INCLUDE "options.inc"}

{$IFDEF WIN32}

{$R res/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

     , uPhysFSLayer, uCursor, uRandom, ArgParsers, uVisualGearsHandlers, uTextures

     {$IFDEF USE_VIDEO_RECORDING}, uVideoRec {$ENDIF}

     {$IFDEF USE_TOUCH_INTERFACE}, uTouch {$ENDIF}

     {$IFDEF ANDROID}, GLUnit{$ENDIF}

     ;

{$IFDEF HWLIBRARY}

procedure RunEngine(argc: LongInt; argv: PPChar); cdecl; export;

procedure preInitEverything();

procedure initEverything(complete:boolean);

procedure freeEverything(complete:boolean);

implementation

{$ELSE}

procedure preInitEverything(); forward;

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

            SetDefaultBinds;

            if HasBorder then

                DisableSomeWeapons;

            AddClouds;

            AddFlakes;

            SetRandomSeed(cSeed, false);

            AssignHHCoords;

            AddMiscGears;

            StoreLoad(false);

            InitWorld;

            ResetKbd;

            if GameType = gmtSave then

                SetSound(false);

            FinishProgress;

            PlayMusic;

            SetScale(zoom);

            updateViewLimits;

            ScriptCall('onGameStart');

            GameState:= gsGame;

            end;

        gsConfirm, gsGame, gsChat:

            begin

            if not cOnlyStats then

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

                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_' + inttostr(GameTicks);

        {$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 SDL2}

    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, {$IFDEF SDL2}SDL_FIRSTEVENT, SDL_LASTEVENT{$ELSE}SDL_ALLEVENTS{$ENDIF}) > 0 do

        begin

            case event.type_ of

{$IFDEF SDL2}

                SDL_KEYDOWN:

                    if GameState = gsChat then

                        begin

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

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

                        end

                    else

                        if GameState >= gsGame then ProcessKey(event.key);

                SDL_KEYUP:

                    if (GameState <> gsChat) and (GameState >= gsGame) 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;

{$IFDEF USE_TOUCH_INTERFACE}

                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);

{$ENDIF}

{$ELSE}

                SDL_KEYDOWN:

                    if GameState = gsChat then

                        KeyPressChat(event.key.keysym.unicode, event.key.keysym.sym)

                    else

                        if GameState >= gsGame then ProcessKey(event.key);

                SDL_KEYUP:

                    if (GameState <> gsChat) and (GameState >= gsGame) then

                        ProcessKey(event.key);

                SDL_MOUSEBUTTONDOWN:

                    if GameState = gsConfirm then

                        ParseCommand('quit', true)

                    else

                        if (GameState >= gsGame) then ProcessMouse(event.button, true);

                SDL_MOUSEBUTTONUP:

                    if (GameState >= gsGame) then 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 (CursorMovementX <> 0) or (CursorMovementY <> 0) then

            handlePositionUpdate(CursorMovementX * cameraKeyboardSpeed, CursorMovementY * cameraKeyboardSpeed);

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

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

        begin

            cScreenResizeDelay:= 0;

            cWindowedWidth:= cNewScreenWidth;

            cWindowedHeight:= cNewScreenHeight;

            cScreenWidth:= cWindowedWidth;

            cScreenHeight:= cWindowedHeight;

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

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

            ScriptOnScreenResize();

            InitCameraBorders();

            InitTouchInterface();

            updateViewLimits();

            SendIPC('W' + IntToStr(cScreenWidth) + 'x' + IntToStr(cScreenHeight));

        end;

        CurrTime:= SDL_GetTicks();

        if PrevTime + longword(cTimerInterval) <= CurrTime then

        begin

            isTerminated:= isTerminated or 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;

//var p: TPathType;

var s: shortstring;

    i: LongInt;

begin

    initEverything(true);

    WriteLnToConsole('Hedgewars engine ' + cVersionString + '-r' + cRevisionString +

                     ' (' + cHashString + ') with protocol #' + inttostr(cNetProtoVersion));

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

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

    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);

{$IFDEF SDL2}

    SDL_StartTextInput();

{$ELSE}

    SDL_EnableUNICODE(1);

{$ENDIF}

    SDL_ShowCursor(0);

    if not cOnlyStats then

        begin

        WriteToConsole('Init SDL_ttf... ');

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

        WriteLnToConsole(msgOK);

        end;

{$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 cTestLua then

        begin

        ParseCommand('script ' + cScriptName, true);

        end

    else

        begin

        if recordFileName = '' then

            begin

            InitIPC;

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

            end

        else

            LoadRecordFromFile(recordFileName);

        end;

    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}

    MainLoop;

    // clean up all the memory allocated

    freeEverything(true);

end;

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

// preInitEverything - init variables that are going to be ovewritten by arguments

// initEverything - init variables only. Should be coupled by below

// freeEverything - free above. Pay attention to the init/free order!

procedure preInitEverything;

begin

    Randomize();

    uVariables.preInitModule;

    uSound.preInitModule;

end;

procedure initEverything (complete:boolean);

begin

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

    uVariables.initModule;          // inits all global variables

    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

    uPhysFSLayer.initModule;

    uScript.initModule;

    if complete then

    begin

        uTextures.initModule;

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

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

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

        uAI.initModule;

        uAIMisc.initModule;

        uAILandMarks.initModule;    //stub

        uAmmos.initModule;

        uCaptions.initModule;

        uChat.initModule;

        uCollisions.initModule;

        uGears.initModule;

        uInputHandler.initModule;