(*
* 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 in 'SDLh.pas',
    uConsts in 'uConsts.pas',
    uGame in 'uGame.pas',
    uMisc in 'uMisc.pas',
    uStore in 'uStore.pas',
    uWorld in 'uWorld.pas',
    uIO in 'uIO.pas',
    uGears in 'uGears.pas',
    uVisualGears in 'uVisualGears.pas',
    uConsole in 'uConsole.pas',
    uKeys in 'uKeys.pas',
    uTeams in 'uTeams.pas',
    uSound in 'uSound.pas',
    uRandom in 'uRandom.pas',
    uAI in 'uAI.pas',
    uAIMisc in 'uAIMisc.pas',
    uAIAmmoTests in 'uAIAmmoTests.pas',
    uAIActions in 'uAIActions.pas',
    uCollisions in 'uCollisions.pas',
    uLand in 'uLand.pas',
    uLandTemplates in 'uLandTemplates.pas',
    uLandObjects in 'uLandObjects.pas',
    uLandGraphics in 'uLandGraphics.pas',
    uLocale in 'uLocale.pas',
    uAmmos in 'uAmmos.pas',
    uSHA in 'uSHA.pas',
    uFloat in 'uFloat.pas',
    uStats in 'uStats.pas',
    uChat in 'uChat.pas',
    uLandTexture in 'uLandTexture.pas',
    uScript in 'uScript.pas',
    sysutils;

// also: GSHandlers.inc
//       GearDrawing.inc
//       CCHandlers.inc
//       HHHandlers.inc
//       SinTable.inc
//       proto.inc

var isTerminated: boolean = false;
    alsoShutdownFrontend: boolean = false;
{$IFDEF HWLIBRARY}
type arrayofpchar = array[0..7] of PChar;

procedure initEverything;
procedure freeEverything;

implementation
{$ELSE}
procedure OnDestroy; forward;
procedure freeEverything; forward;
{$ENDIF}

////////////////////////////////
procedure DoTimer(Lag: LongInt);
{$IFNDEF IPHONEOS}
var s: shortstring;
{$ENDIF}
begin
    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;
                DoGameTick(Lag);
                ProcessVisualGears(Lag);
                end;
        gsChat: begin
                DrawWorld(Lag);
                DoGameTick(Lag);
                ProcessVisualGears(Lag);
                end;
        gsExit: begin
                isTerminated:= true;
                end;
        end;

    SDL_GL_SwapBuffers();
{$IFDEF SDL13}
    SDL_RenderPresent();
{$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...');
    if isSoundEnabled then ReleaseSound();
    StoreRelease();
    FreeGearsList();
    FreeVisualGears();
    FreeLand();
    ControllerClose();
    SendKB();
    CloseIPC();
    TTF_Quit();
    SDL_Quit();
    isTerminated:= false;
end;

///////////////////
procedure MainLoop; 
var PrevTime, CurrTime: Longword;
    {$IFNDEF IPHONEOS}event: TSDL_Event;{$ENDIF}
begin
    PrevTime:= SDL_GetTicks;
    while isTerminated = false do
    begin
{$IFNDEF IPHONEOS}
// have to remove this cycle because otherwise it segfaults at exit
        while SDL_PollEvent(@event) <> 0 do
        begin
            case event.type_ of
                SDL_KEYDOWN: if GameState = gsChat then KeyPressChat(event.key.keysym.unicode);
{$IFDEF SDL13}
                SDL_WINDOWEVENT:
{$ELSE}
                SDL_ACTIVEEVENT:
{$ENDIF}
                    if (event.active.state and SDL_APPINPUTFOCUS) <> 0 then
                        cHasFocus:= event.active.gain = 1;
                //SDL_VIDEORESIZE: Resize(max(event.resize.w, 600), max(event.resize.h, 450));
                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;
                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
{$ENDIF}
        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;

///////////////
{$IFDEF HWLIBRARY}
procedure Game(gameArgs: arrayofpchar); cdecl; export;
{$ELSE}
procedure Game;
{$ENDIF}
var p: TPathType;
    s: shortstring;
begin
{$IFDEF HWLIBRARY}
    initEverything();
    Randomize();

    cBits:= 32;
    cFullScreen:= false;
    cVSyncInUse:= true;
    cTimerInterval:= 8;
    PathPrefix:= 'Data';
    cReducedQuality:= false;
    cShowFPS:= true;
    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);
    cInitHeight:= cScreenHeight;
    cInitWidth:= cScreenWidth;
{$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();
    OnDestroy();
{$IFDEF HWLIBRARY}freeEverything();{$ENDIF}
    if alsoShutdownFrontend then halt;
end;

procedure initEverything;
begin
    Randomize();

    uConsts.initModule;
    uMisc.initModule;
    uConsole.initModule;    // MUST happen after uMisc
    
    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;
    uIO.initModule;
    uKeys.initModule;
    uLand.initModule;
    //uLandGraphics does not need initialization
    //uLandObjects does not need initialization
    //uLandTemplates does not need initialization
    //uLandTexture does not need initialization
    //uLocale does not need initialization
    uRandom.initModule; 
    //uSHA is initialized internally
    uSound.initModule;
    uStats.initModule;
    uStore.initModule;
    uTeams.initModule;
    uVisualGears.initModule;
    uWorld.initModule;
    uScript.initModule;
end;

procedure freeEverything;
begin
    uWorld.freeModule;
    uVisualGears.freeModule;    //stub
    uTeams.freeModule;
    uStore.freeModule;          //stub
    uStats.freeModule;          //stub
    uSound.freeModule;          //stub
    //uSHA does not need to be freed
    uRandom.freeModule;         //stub
    //uLocale does not need to be freed
    //uLandTemplates does not need to be freed
    //uLandTexture does not need to be freed
    //uLandObjects does not need to be freed
    //uLandGraphics does not need to be freed
    uLand.freeModule;
    uKeys.freeModule;           //stub
    uIO.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

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

end;

/////////////////////////
procedure GenLandPreview{$IFDEF IPHONEOS}(port: LongInt){$ENDIF}; {$IFDEF HWLIBRARY}cdecl; export;{$ENDIF}
var Preview: TPreview;
begin
{$IFDEF IPHONEOS}
    initEverything();
    WriteLnToConsole('Preview connecting on port ' + inttostr(port));
    ipcPort:= port;
{$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();
{$IFDEF IPHONEOS}
    freeEverything();
{$ENDIF}
end;

{$IFNDEF HWLIBRARY}
////////////////////////////////
procedure Resize(w, h: LongInt);
begin
    cScreenWidth:= w;
    cScreenHeight:= h;
    if cFullScreen then
        ParseCommand('/fullscr 1', true)
    else
        ParseCommand('/fullscr 0', true);
end;

/////////////////////
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;
{$IFDEF DEBUGFILE}
var i: LongInt;
{$ENDIF}
begin

    case ParamCount of
        18: begin
            val(ParamStr(2), cScreenWidth);
            val(ParamStr(3), cScreenHeight);
            cInitWidth:= cScreenWidth;
            cInitHeight:= cScreenHeight;
            cBitsStr:= ParamStr(4);
            val(cBitsStr, cBits);
            val(ParamStr(5), ipcPort);
            cFullScreen:= ParamStr(6) = '1';
            isSoundEnabled:= ParamStr(7) = '1';
            cVSyncInUse:= ParamStr(8) = '1';
            cWeaponTooltips:= ParamStr(9) = '1';
            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';
            cReducedQuality:= ParamStr(18) = '1';
        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);
                cInitWidth:= cScreenWidth;
                cInitHeight:= 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);
                cInitWidth:= cScreenWidth;
                cInitHeight:= 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);
                cInitWidth:= cScreenWidth;
                cInitHeight:= 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);
                cReducedQuality:= ParamStr(15) = '1';
            end
            else GameType:= gmtSyntax;
        end;
        else GameType:= gmtSyntax;
    end;

{$IFDEF DEBUGFILE}
    AddFileLog('Prefix: "' + PathPrefix +'"');
    for i:= 0 to ParamCount do
        AddFileLog(inttostr(i) + ': ' + ParamStr(i));
{$ENDIF}
end;

////////////////////////////////////////////////////////////////////////////////
/////////////////////////////// m a i n ////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
begin
    initEverything();
    WriteLnToConsole('Hedgewars ' + cVersionString + ' engine (network protocol: ' + inttostr(cNetProtoVersion) + ')');
    
    GetParams();

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