program example;

uses
  sysutils, variants, Classes,
  ulibShaderFile;

const
  {$IF DEFINED(WIN32)}
  LibName = '..\..\..\libShaderFile-i386-win32.dll';
  {$ELSEIF DEFINED(WIN64)}
  LibName = '..\..\..\libShaderFile-x86_64-win64.dll';
  {$ELSEIF DEFINED(LINUX) AND DEFINED(CPU32)}
  LibName = '../../../libShaderFile-i386-linux.so';
  {$ELSEIF DEFINED(LINUX) AND DEFINED(CPU64)}
  LibName = '../../../libShaderFile-x86_64-linux.so';
  {$ELSE}
    {$ERROR 'unknown operation system'}
  {$IFEND}

type
  TFileReader = class(TInterfacedObject, IlsfFileReader)
  public
    function LoadStream(const aFilename: String; const aStream: TStream): Boolean;
  end;

var
  i: Integer;
  s: String;
  ShaderFile: TlsfShaderFile;
  Generator: TlsfGenerator;

function TFileReader.LoadStream(const aFilename: String; const aStream: TStream): Boolean;
var
  fs: TFileStream;
begin
  fs := TFileStream.Create(aFilename, fmOpenRead);
  try
    aStream.CopyFrom(fs, fs.Size - fs.Position);
    result := true;
  finally
    FreeAndNil(fs);
  end;
end;

begin
  lsf_init(ExtractFilePath(ParamStr(0)) + LibName);
  try
    if (ParamCount < 2) then begin
      WriteLn('error: expected input file and generator/class name as parameter');
      ExitCode := 1;
      exit;
    end;
    ShaderFile := TlsfShaderFile.Create;
    try
      ShaderFile.LoadFromFunc(ParamStr(1), TFileReader.Create);
      Generator := TlsfGenerator.Create(ShaderFile, ParamStr(2));
      try
        i := 3;
        while (i < ParamCount) do begin
          s := ParamStr(i+1);
          Generator.SetProperty(ParamStr(i), s);
          inc(i, 2);
        end;
        WriteLn(Generator.GenerateCode);
      finally
        FreeAndNil(Generator);
      end;
    finally
      FreeAndNil(ShaderFile);
    end;
  except
    on e: Exception do begin
      WriteLn('error: ' + e.Message);
      ExitCode := 2;
    end;
  end;
  lsf_finish;
end.