(*
* Hedgewars, a free turn based strategy game
* Copyright (c) 2004-2010 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, uKeys, uSound, 
     uScript, uTeams, uStats, uIO, uLocale, uChat, uAI, uAIMisc, uRandom, uLandTexture, uCollisions, sysutils;
     
type arrayofpchar = array[0..9] of PChar;
var isTerminated: boolean = false;
    alsoShutdownFrontend: boolean = false;

{$IFDEF HWLIBRARY}
procedure initEverything(complete:boolean);
procedure freeEverything(complete:boolean);

implementation
{$ELSE}
procedure OnDestroy; forward;
procedure initEverything(complete:boolean); forward;
procedure freeEverything(complete:boolean); forward;
{$ENDIF}

////////////////////////////////
procedure DoTimer(Lag: LongInt);
{$IFNDEF IPHONEOS}
var s: shortstring;
{$ENDIF}
begin
    if not isPaused then inc(RealTicks, Lag);

    case GameState of
        gsLandGen: begin
                GenMap;
                GameState:= gsStart;
                end;
        gsStart: begin
                if HasBorder then DisableSomeWeapons;
                AddClouds;
                AssignHHCoords;
                AddMiscGears;
                StoreLoad;
                InitWorld;
                ResetKbd;
                SoundLoad;
                if GameType = gmtSave then
                    begin
                    isSEBackup:= isSoundEnabled;
                    isSoundEnabled:= false
                    end;
                FinishProgress;
                PlayMusic;
                SetScale(zoom);
                ScriptCall('onGameStart');
                GameState:= gsGame;
                end;
        gsConfirm,
        gsGame: begin
                DrawWorld(Lag); // never place between ProcessKbd and DoGameTick - bugs due to /put cmd and isCursorVisible
                ProcessKbd;
                if not isPaused then
                    begin
                    DoGameTick(Lag);
                    ProcessVisualGears(Lag);
                    end;
                end;
        gsChat: begin
                DrawWorld(Lag);
                if not isPaused then
                    begin
                    DoGameTick(Lag);
                    ProcessVisualGears(Lag);
                    end;
                end;
        gsExit: begin
                isTerminated:= true;
                end;
        end;

{$IFDEF SDL13}
    SDL_RenderPresent();
{$ELSE}
    SDL_GL_SwapBuffers();
{$ENDIF}
{$IFNDEF IPHONEOS}
    // not going to make captures on the iPhone
    if flagMakeCapture then
    begin
        flagMakeCapture:= false;
        s:= 'hw_' + FormatDateTime('YYYY-MM-DD_HH-mm-ss', Now()) + inttostr(GameTicks);
        WriteLnToConsole('Saving ' + s + '...');
        MakeScreenshot(s);
        //SDL_SaveBMP_RW(SDLPrimSurface, SDL_RWFromFile(Str2PChar(s), 'wb'), 1)
    end;
{$ENDIF}
end;

////////////////////
procedure OnDestroy;
begin
    WriteLnToConsole('Freeing resources...');
    FreeActionsList();
    StoreRelease();
    ControllerClose();
    SendKB();
    CloseIPC();
    TTF_Quit();
{$IFDEF SDL13}
    SDL_DestroyRenderer(SDLwindow);
    SDL_DestroyWindow(SDLwindow);
{$ENDIF}
    SDL_Quit();
    isTerminated:= false;
end;

///////////////////
procedure MainLoop; 
var PrevTime, CurrTime: Longword;
    event: TSDL_Event;
begin
    PrevTime:= SDL_GetTicks;
    while isTerminated = false do
    begin

        while SDL_PollEvent(@event) <> 0 do
        begin
            case event.type_ of
                SDL_KEYDOWN: if GameState = gsChat then KeyPressChat(event.key.keysym.unicode);
{$IFDEF SDL13}
                SDL_WINDOWEVENT:
                    if event.wevent.event = SDL_WINDOWEVENT_SHOWN then
                        cHasFocus:= true;
{$ELSE}
                SDL_ACTIVEEVENT:
                    if (event.active.state and SDL_APPINPUTFOCUS) <> 0 then
                        cHasFocus:= event.active.gain = 1;
{$ENDIF}
{$IFNDEF IPHONEOS}
                SDL_MOUSEBUTTONDOWN: if event.button.button = SDL_BUTTON_WHEELDOWN then uKeys.wheelDown:= true;
                SDL_MOUSEBUTTONUP: if event.button.button = SDL_BUTTON_WHEELUP then uKeys.wheelUp:= true;
{$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_
        end; // end while SDL_PollEvent(@event) <> 0

        if isTerminated = false then
        begin
            CurrTime:= SDL_GetTicks;
            if PrevTime + cTimerInterval <= CurrTime then
            begin
                DoTimer(CurrTime - PrevTime);
                PrevTime:= CurrTime
            end 
            else SDL_Delay(1);
            IPCCheckSock();
        end;
    end;
end;

/////////////////////////
procedure ShowMainWindow;
begin
    if cFullScreen then ParseCommand('fullscr 1', true)
    else ParseCommand('fullscr 0', true);
    SDL_ShowCursor(0)
end;

///////////////
{$IFDEF HWLIBRARY}
procedure Game(gameArgs: arrayofpchar); cdecl; export;
var tmp_quality: LongInt;
{$ELSE}
procedure Game;
{$ENDIF}
var p: TPathType;
    s: shortstring;
{$IFDEF DEBUGFILE}
    i: LongInt;
{$ENDIF}
begin
{$IFDEF HWLIBRARY}
    cBits:= 32;
    cFullScreen:= false;
    cVSyncInUse:= true;
    cTimerInterval:= 8;
    PathPrefix:= 'Data';
{$IFDEF DEBUGFILE}
    cShowFPS:= true;
{$ELSE}
    cShowFPS:= true;    // update me at release time
{$ENDIF}
    cInitVolume:= 100;

    UserNick:= gameArgs[0];
    val(gameArgs[1], ipcPort);
    isSoundEnabled:= gameArgs[2] = '1';
    isMusicEnabled:= gameArgs[3] = '1';
    cLocaleFName:= gameArgs[4];
    cAltDamage:= gameArgs[5] = '1';
    val(gameArgs[6], cScreenHeight);
    val(gameArgs[7], cScreenWidth);
    recordFileName:= gameArgs[8];
    
    val(gameArgs[9], tmp_quality);
    case tmp_quality of
        0: cReducedQuality:= rqNone;
        1: cReducedQuality:= rqBlurryLand;
        2: cReducedQuality:= rqBlurryLand or rqKillFlakes;
        3: cReducedQuality:= rqBlurryLand or rqKillFlakes or rqLowRes;
    end;
{$ENDIF}

    initEverything(true);
    WriteLnToConsole('Hedgewars ' + cVersionString + ' engine (network protocol: ' + inttostr(cNetProtoVersion) + ')');
{$IFDEF DEBUGFILE}
    AddFileLog('Prefix: "' + PathPrefix +'"');
    for i:= 0 to ParamCount do
        AddFileLog(inttostr(i) + ': ' + ParamStr(i));
{$ENDIF}

    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) >= 0, true);
    WriteLnToConsole(msgOK);

    SDL_EnableUNICODE(1);

    WriteToConsole('Init SDL_ttf... ');
    SDLTry(TTF_Init() <> -1, true);
    WriteLnToConsole(msgOK);

{$IFDEF WIN32}
    s:= SDL_getenv('SDL_VIDEO_CENTERED');
    SDL_putenv('SDL_VIDEO_CENTERED=1');
    ShowMainWindow();
    SDL_putenv(str2pchar('SDL_VIDEO_CENTERED=' + s));
{$ELSE}
    ShowMainWindow();
{$ENDIF}

    AddProgress();

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

    if recordFileName = '' then
        InitIPC;
    WriteLnToConsole(msgGettingConfig);

    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(cLocaleFName) > 6) and (Copy(cLocaleFName,1,2)+'.txt' <> 'en.txt') then 
            LoadLocale(Pathz[ptLocale] + '/' + Copy(cLocaleFName,1,2)+'.txt');
        LoadLocale(Pathz[ptLocale] + '/' + cLocaleFName);
    end;

    if recordFileName = '' then
        SendIPCAndWaitReply('C')        // ask for game config
    else
        LoadRecordFromFile(recordFileName);

    ScriptOnGameInit;

    s:= 'eproto ' + inttostr(cNetProtoVersion);
    SendIPCRaw(@s[0], Length(s) + 1); // send proto version

    InitTeams();
    AssignStores();

    if isSoundEnabled then
        InitSound();

    isDeveloperMode:= false;

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

    ParseCommand('rotmask', true);

    MainLoop();
    // clean up SDL and GL context
    OnDestroy();
    // clean up all the other memory allocated
    freeEverything(true);
    if alsoShutdownFrontend then halt;
end;

procedure initEverything (complete:boolean);
begin
    Randomize();

    uConsts.initModule;
    uMisc.initModule;
    uConsole.initModule;    // MUST happen after uMisc

    uLand.initModule;
    uIO.initModule;
    
    if complete then
    begin
        uAI.initModule;
        //uAIActions does not need initialization
        //uAIAmmoTests does not need initialization
        uAIMisc.initModule;
        uAmmos.initModule;
        uChat.initModule;
        uCollisions.initModule;
        //uFloat does not need initialization
        //uGame does not need initialization
        uGears.initModule;
        uKeys.initModule;
        //uLandGraphics does not need initialization
        //uLandObjects does not need initialization
        //uLandTemplates does not need initialization
        uLandTexture.initModule;
        //uLocale does not need initialization
        uRandom.initModule; 
        uScript.initModule;
        uSound.initModule;
        uStats.initModule;
        uStore.initModule;
        uTeams.initModule;
        uVisualGears.initModule;
        uWorld.initModule;
    end;
end;

procedure freeEverything (complete:boolean);
begin
    if complete then
    begin
        uWorld.freeModule;
        uVisualGears.freeModule;
        uTeams.freeModule;
        uStore.freeModule;          //stub
        uStats.freeModule;          //stub
        uSound.freeModule;
        uScript.freeModule;
        uRandom.freeModule;         //stub
        //uLocale does not need to be freed
        //uLandTemplates does not need to be freed
        uLandTexture.freeModule;
        //uLandObjects does not need to be freed
        //uLandGraphics does not need to be freed
        uKeys.freeModule;           //stub
        uGears.freeModule;
        //uGame does not need to be freed
        //uFloat does not need to be freed
        uCollisions.freeModule;     //stub
        uChat.freeModule;           //stub
        uAmmos.freeModule;
        uAIMisc.freeModule;         //stub
        //uAIAmmoTests does not need to be freed
        //uAIActions does not need to be freed
        uAI.freeModule;             //stub
    end;
    
    uIO.freeModule;             //stub
    uLand.freeModule;

    uConsole.freeModule;
    uMisc.freeModule;           // uMisc closes the debug log.
    uConsts.freeModule;         //stub
end;

/////////////////////////
procedure GenLandPreview{$IFDEF HWLIBRARY}(port: LongInt); cdecl; export{$ENDIF};
var Preview: TPreview;
begin
    initEverything(false);
{$IFDEF HWLIBRARY}
    WriteLnToConsole('Preview connecting on port ' + inttostr(port));
    ipcPort:= port;
{$ENDIF}
    InitIPC;
    IPCWaitPongEvent;
    TryDo(InitStepsFlags = cifRandomize, 'Some parameters not set (flags = ' + inttostr(InitStepsFlags) + ')', true);

    Preview:= GenPreview();
    WriteLnToConsole('Sending preview...');
    SendIPCRaw(@Preview, sizeof(Preview));
    SendIPCRaw(@MaxHedgehogs, sizeof(byte));
    WriteLnToConsole('Preview sent, disconnect');
    CloseIPC();
    freeEverything(false);
end;

{$IFNDEF HWLIBRARY}
/////////////////////
procedure DisplayUsage;
var i: LongInt;
begin
    WriteLn('Wrong argument format: correct configurations is');
    WriteLn();
    WriteLn('  hwengine <path to data folder> <path to replay file> [option]');
    WriteLn();
    WriteLn('where [option] must be specified either as');
    WriteLn(' --set-video [screen width] [screen height] [color dept]');
    WriteLn(' --set-audio [volume] [enable music] [enable sounds]');
    WriteLn(' --set-other [language file] [full screen] [show FPS]');
    WriteLn(' --set-multimedia [screen height] [screen width] [color dept] [volume] [enable music] [enable sounds] [language file] [full screen]');
    WriteLn(' --set-everything [screen height] [screen width] [color dept] [volume] [enable music] [enable sounds] [language file] [full screen] [show FPS] [alternate damage] [timer value] [reduced quality]');
    WriteLn();
    WriteLn('Read documentation online at http://www.hedgewars.org/node/1465 for more information');
    Write('parsed command: ');
    for i:=0 to ParamCount do
        Write(ParamStr(i) + ' ');
    WriteLn();
end;

////////////////////
procedure GetParams;
begin
    case ParamCount of
        18: begin
            val(ParamStr(2), cScreenWidth);
            val(ParamStr(3), cScreenHeight);
            cBitsStr:= ParamStr(4);
            val(cBitsStr, cBits);
            val(ParamStr(5), ipcPort);
            cFullScreen:= ParamStr(6) = '1';
            isSoundEnabled:= ParamStr(7) = '1';
            cVSyncInUse:= ParamStr(8) = '1';        //unused
            cWeaponTooltips:= ParamStr(9) = '1';    //should be merged with rqFlags
            cLocaleFName:= ParamStr(10);
            val(ParamStr(11), cInitVolume);
            val(ParamStr(12), cTimerInterval);
            PathPrefix:= ParamStr(13);
            cShowFPS:= ParamStr(14) = '1';
            cAltDamage:= ParamStr(15) = '1';
            UserNick:= DecodeBase64(ParamStr(16));
            isMusicEnabled:= ParamStr(17) = '1';

            if (ParamStr(18) = '1') then        //HACK
                cReducedQuality:= $FFFFFFFF xor rqLowRes
            else
                val(ParamStr(18), cReducedQuality);
        end;
        3: begin
            val(ParamStr(2), ipcPort);
            GameType:= gmtLandPreview;
            if ParamStr(3) <> 'landpreview' then 
                OutError(errmsgShouldntRun, true);
        end;
        2: begin
            PathPrefix:= ParamStr(1);
            recordFileName:= ParamStr(2);
        end;
        6: begin
            PathPrefix:= ParamStr(1);
            recordFileName:= ParamStr(2);

            if ParamStr(3) = '--set-video'  then
            begin
                val(ParamStr(4), cScreenWidth);
                val(ParamStr(5), cScreenHeight);
                cBitsStr:= ParamStr(6);
                val(cBitsStr, cBits);
            end
            else
            begin
                if ParamStr(3) = '--set-audio' then
                begin
                    val(ParamStr(4), cInitVolume);
                    isMusicEnabled:= ParamStr(5) = '1';
                    isSoundEnabled:= ParamStr(6) = '1';
                end
                else
                begin
                    if ParamStr(3) = '--set-other' then
                    begin
                        cLocaleFName:= ParamStr(4);
                        cFullScreen:= ParamStr(5) = '1';
                        cShowFPS:= ParamStr(6) = '1';
                    end
                    else GameType:= gmtSyntax;
                end
            end;
        end;
        11: begin
            PathPrefix:= ParamStr(1);
            recordFileName:= ParamStr(2);

            if ParamStr(3) = '--set-multimedia' then
            begin
                val(ParamStr(4), cScreenWidth);
                val(ParamStr(5), cScreenHeight);
                cBitsStr:= ParamStr(6);
                val(cBitsStr, cBits);
                val(ParamStr(7), cInitVolume);
                isMusicEnabled:= ParamStr(8) = '1';
                isSoundEnabled:= ParamStr(9) = '1';
                cLocaleFName:= ParamStr(10);
                cFullScreen:= ParamStr(11) = '1';
            end
            else GameType:= gmtSyntax;
        end;
        15: begin
            PathPrefix:= ParamStr(1);
            recordFileName:= ParamStr(2);
            if ParamStr(3) = '--set-everything' then
            begin
                val(ParamStr(4), cScreenWidth);
                val(ParamStr(5), cScreenHeight);
                cBitsStr:= ParamStr(6);
                val(cBitsStr, cBits);
                val(ParamStr(7), cInitVolume);
                isMusicEnabled:= ParamStr(8) = '1';
                isSoundEnabled:= ParamStr(9) = '1';
                cLocaleFName:= ParamStr(10);
                cFullScreen:= ParamStr(11) = '1';
                cAltDamage:= ParamStr(12) = '1';
                cShowFPS:= ParamStr(13) = '1';
                val(ParamStr(14), cTimerInterval);
                if (ParamStr(15) = '1') then        //HACK
                    cReducedQuality:= $FFFFFFFF xor rqLowRes
                else
                    val(ParamStr(15), cReducedQuality);
            end
            else GameType:= gmtSyntax;
        end;
        else GameType:= gmtSyntax;
    end;
end;

////////////////////////////////////////////////////////////////////////////////
/////////////////////////////// m a i n ////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
begin
    GetParams();

    if GameType = gmtLandPreview then GenLandPreview()
    else if GameType = gmtSyntax then DisplayUsage()
    else Game();
    
    if GameType = gmtSyntax then
        ExitCode:= 1
    else
        ExitCode:= 0;
{$ENDIF}
end.