(*

 * 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

 *)

procedure internalStartGameWithParameters();

var tmp: LongInt;

begin

    UserPathPrefix:= ParamStr(1);

    cScreenWidth:= StrToInt(ParamStr(2));

    cScreenHeight:= StrToInt(ParamStr(3));

    cBits:= StrToInt(ParamStr(4));

    ipcPort:= StrToInt(ParamStr(5));

    cFullScreen:= ParamStr(6) = '1';

    SetSound(ParamStr(7) = '1');

    SetMusic(ParamStr(8) = '1');

    SetVolume(StrToInt(ParamStr(9)));

    cTimerInterval:= StrToInt(ParamStr(10));

    PathPrefix:= ParamStr(11);

    cShowFPS:= ParamStr(12) = '1';

    cAltDamage:= ParamStr(13) = '1';

    UserNick:= DecodeBase64(ParamStr(14));

    cReducedQuality:= StrToInt(ParamStr(15));

    tmp:= StrToInt(ParamStr(16));

    GrayScale:= false;

    if (tmp > 9) and (tmp < 16) then 

        begin

        GrayScale:= true;

        cStereoMode:= TStereoMode(max(0, min(ord(high(TStereoMode)), tmp-9)))

        end

    else if tmp <= 9 then 

        cStereoMode:= TStereoMode(max(0, min(ord(high(TStereoMode)), tmp)))

    else 

        cStereoMode:= TStereoMode(max(0, min(ord(high(TStereoMode)), tmp-6)));

    cLocaleFName:= ParamStr(17);

end;

{$IFDEF USE_VIDEO_RECORDING}

procedure internalStartVideoRecordingWithParameters();

begin

    internalStartGameWithParameters();

    GameType:= gmtRecord;

    cVideoFramerateNum:= StrToInt(ParamStr(18));

    cVideoFramerateDen:= StrToInt(ParamStr(19));

    RecPrefix:= ParamStr(20);

    cAVFormat:= ParamStr(21);

    cVideoCodec:= ParamStr(22);

    cVideoQuality:= StrToInt(ParamStr(23));

    cAudioCodec:= ParamStr(24);

end;

{$ENDIF}

procedure DisplayUsage;

begin

    WriteLn(stdout, 'Usage:');

    WriteLn(stdout, '');

    WriteLn(stdout, '');

    WriteLn(stdout, 'where [options] are any of the following:');

    WriteLn(stdout, ' --locale [path to language file]');

    WriteLn(stdout, ' --width  [screen width in pixels]');

    WriteLn(stdout, ' --height [screen height in pixels]');

    WriteLn(stdout, ' --depth  [color depth]');

    WriteLn(stdout, ' --volume [sound level]');

    WriteLn(stdout, ' --time   [number of seconds]');

    WriteLn(stdout, ' --nomusic');

    WriteLn(stdout, ' --nosound');

    WriteLn(stdout, ' --fullscreen');

    WriteLn(stdout, ' --showfps');

    WriteLn(stdout, ' --altdmg');

    WriteLn(stdout, ' --lowquality');

    WriteLn(stdout, ' --stats-only');

    WriteLn(stdout, ' --help');

    WriteLn(stdout, '');

    WriteLn(stdout, 'Deprecated options:');

    WriteLn(stdout, ' --set-video [screen width] [screen height] [color dept]');

    WriteLn(stdout, ' --set-audio [volume] [enable music] [enable sounds]');

    WriteLn(stdout, ' --set-other [language file] [full screen] [show FPS]');

    WriteLn(stdout, ' --set-multimedia [screen width] [screen height] [color dept] [volume] [enable music] [enable sounds] [language file] [full screen]');

    WriteLn(stdout, ' --set-everything [screen width] [screen height] [color dept] [volume] [enable music] [enable sounds] [language file] [full screen] [show FPS] [alternate damage] [timer value] [reduced quality]');

    WriteLn(stdout, '');

    WriteLn(stdout, 'For a more detailed help and examples go to:');

    WriteLn(stdout, 'http://code.google.com/p/hedgewars/wiki/CommandLineOptions');

end;

function getLongIntParameter(str:String; var paramIndex:LongInt; var wrongParameter:Boolean): LongInt;

var tmpInt, c: LongInt;

begin

    paramIndex:= paramIndex + 1;

    val(str, tmpInt, c);

    wrongParameter:= c <> 0;

    if wrongParameter then

        WriteLn(stderr, 'ERROR: '+ParamStr(paramIndex-1)+' expects a number, you passed "'+str+'"');

    getLongIntParameter:= tmpInt;

end;

function getStringParameter(str:String; var paramIndex:LongInt): String;

begin

    paramIndex:= paramIndex + 1;

    getStringParameter:= str;

end;

procedure parseClassicParameter(cmdArray: Array of String; size:LongInt; var paramIndex:LongInt); Forward;

function parseParameter(cmd:String; arg:String; var paramIndex:LongInt): Boolean;

const videoArray: Array [1..3] of String = ('--width','--height','--depth');

const audioArray: Array [1..3] of String = ('--volume','--nomusic','--nosound');

const otherArray: Array [1..3] of String = ('--locale','--fullscreen','--showfps');

const mediaArray: Array [1..8] of String = ('--width','--height','--depth','--volume','--nomusic','--nosound','--locale','--fullscreen');

const allArray: Array [1..12] of String = ('--width','--height','--depth','--volume','--nomusic','--nosound','--locale','--fullscreen','--showfps','--altdmg','--time','--lowquality');

const reallyAll: array[0..19] of shortstring = (

            '--locale', '--width', '--height', '--depth', '--time'

            , '--volume', '--nomusic', '--nosound', '--fullscreen', '--showfps'

            , '--altdmg', '--lowquality', '--set-video', '--set-audio', '--set-other'

            , '--set-multimedia', '--set-everything', '--stats-only', '--gci', '--help');

var cmdIndex: byte;

begin

    parseParameter:= false;

    cmdIndex:= 0;

    while (cmdIndex <= High(reallyAll)) and (cmd <> reallyAll[cmdIndex]) do inc(cmdIndex);

    case cmdIndex of

        {--locale}   0 : cLocaleFName   := getStringParameter (arg, paramIndex);

        {--width}    1 : cScreenWidth   := getLongIntParameter(arg, paramIndex, parseParameter);

        {--height}   2 : cScreenHeight  := getLongIntParameter(arg, paramIndex, parseParameter);

        {--depth}    3 : cBits          := getLongIntParameter(arg, paramIndex, parseParameter);

        {--time}     4 : cTimerInterval := getLongIntParameter(arg, paramIndex, parseParameter);

        {--volume}   5 : SetVolume       ( getLongIntParameter(arg, paramIndex, parseParameter) );

        {--nomusic}  6 : SetMusic        ( false );

        {--nosound}  7 : SetSound        ( false );

        {--fullscreen}   8 : cFullScreen    := true;

        {--showfps}      9 : cShowFPS       := true;

        {--altdmg}      10 : cAltDamage     := true;

        {--lowquality}  11 : cReducedQuality:= ($FFFFFFFF * getLongIntParameter(arg, paramIndex, parseParameter)) xor rqLowRes; //HACK!

        {--set-video}   12 : parseClassicParameter(videoArray,3,paramIndex);

        {--set-audio}   13 : parseClassicParameter(audioArray,3,paramIndex);

        {--set-other}   14 : parseClassicParameter(otherArray,3,paramIndex);

        {--set-multimedia}  15 : parseClassicParameter(mediaArray,8,paramIndex);

        {--set-everything}  16 : parseClassicParameter(allArray,12,paramIndex);

        {--stats-only}  17 : begin

                             cOnlyStats:= true;

                             SetSound(false);

                             SetMusic(false);

                             cReducedQuality:= $FFFFFFFF xor rqLowRes;

                             end;

        {--gci}  18 : begin            //     We had to make up all this saved space some how...     \\

                      WriteLn(stdout, '                                                                ');

                      WriteLn(stdout, '      /\\\\\\\\\\\\        /\\\\\\\\\  /\\\\\\\\\\\             ');

                      WriteLn(stdout, '     /\\\//////////      /\\\////////  \/////\\\///             ');

                      WriteLn(stdout, '     /\\\               /\\\/               \/\\\               ');

                      WriteLn(stdout, '     \/\\\    /\\\\\\\  /\\\                 \/\\\              ');

                      WriteLn(stdout, '      \/\\\   \/////\\\ \/\\\                 \/\\\             ');

                      WriteLn(stdout, '       \/\\\       \/\\\ \//\\\                \/\\\            ');

                      WriteLn(stdout, '        \/\\\       \/\\\  \///\\\              \/\\\           ');

                      WriteLn(stdout, '         \//\\\\\\\\\\\\/     \////\\\\\\\\\  /\\\\\\\\\\\      ');

                      WriteLn(stdout, '          \////////////           \/////////  \///////////      ');

                      WriteLn(stdout, '                                                                ');

                      WriteLn(stdout, ' Command Line Parser Implementation by a Google Code-In Student ');

                      WriteLn(stdout, '             ASCII Art easter egg idea by @sheepluva            ');

                      WriteLn(stdout, '                                                                ');

                      end;

        {--help}  19 : begin

                       DisplayUsage();

                       GameType:= gmtSyntax;

                       end;

    else

        begin

        WriteLn(stderr, 'ERROR: '+cmd+' is not a valid argument');

        parseParameter:= true;

        end

    end;

end;

procedure parseClassicParameter(cmdArray: Array of String; size:LongInt; var paramIndex:LongInt);

var index, tmpInt: LongInt;

    isBool: Boolean;

begin

    index:= 0;

    tmpInt:= 1;

    while (index < size) do

        begin

        paramIndex:= paramIndex+1;

        // check if the parameter is a boolean one

        isBool:= (cmdArray[index] = '--nomusic')

            or (cmdArray[index] = '--nosound')

            or (cmdArray[index] = '--fullscreen')

            or (cmdArray[index] = '--showfps')

            or (cmdArray[index] = '--altdmg')

            or (cmdArray[index] = '--lowquality');

        if (not isBool) or ((ParamStr(paramIndex)='1') and (cmdArray[index]<>'--nomusic') and (cmdArray[index]<>'--nosound')) then

            parseParameter(cmdArray[index], ParamStr(paramIndex), tmpInt);

        index:= index+1;

        end;

end;

    wrongParameter: boolean;

begin

    wrongParameter:= false;

    while (paramIndex <= ParamCount) do

        begin

        if parseParameter( ParamStr(paramIndex), ParamStr(paramIndex+1), paramIndex) then

            wrongParameter:= true;

        paramIndex:= paramIndex+1;

        end;

    if wrongParameter = true then

        begin

        WriteLn(stderr, 'Please use --help to see possible arguments and their usage');

        GameType:= gmtSyntax;

        end

end;