unit mod_winboard;

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils,
  StdCtrls, Forms, Controls,
  chessmodules, chessgame;

type

  { TWinboardChessModule }

  TWinboardChessModule = class(TChessModule)
  private
    textEnginePatch : TStaticText;
    editEnginePatch : TEdit;
    EngineStringList: TStringList;
    side            : boolean; //Side to move true=human.
  public
    constructor Create; override;
    procedure CreateUserInterface(); override;
    procedure ShowUserInterface(AParent: TWinControl); override;
    procedure HideUserInterface(); override;
    procedure FreeUserInterface(); override;
    procedure PrepareForGame(); override;
    procedure HandleOnMove(AFrom, ATo: TPoint); override;
  end;

implementation
uses winboardConn;

{ TSinglePlayerChessModule }

constructor TWinboardChessModule.Create;
begin
  inherited Create;

  SelectionDescription := 'Play against a winboard engine';
  PlayingDescription := 'Play against a winboard engine';
  Kind := cmkAgainstComputer;
end;

procedure TWinboardChessModule.CreateUserInterface;
begin
  textEnginePatch := TStaticText.Create(nil);
  textEnginePatch.SetBounds(20, 20, 180, 50);
  textEnginePatch.Caption := 'Full patch to the engine';

  editEnginePatch := TEdit.Create(nil);
  editEnginePatch.SetBounds(200, 20, 150, 50);
  editEnginePatch.Text := 'gnuchess';
end;

procedure TWinboardChessModule.ShowUserInterface(AParent: TWinControl);
begin
  textEnginePatch.Parent := AParent;
  editEnginePatch.Parent := AParent;
end;

procedure TWinboardChessModule.HideUserInterface();
begin
  textEnginePatch.Parent := nil;
  editEnginePatch.Parent := nil;
end;

procedure TWinboardChessModule.FreeUserInterface();
begin
  textEnginePatch.Free;
  editEnginePatch.Free;
end;

procedure TWinboardChessModule.HandleOnMove(AFrom, ATo: TPoint);
var
  moveStr : String;
  CompMove: moveInCoord;
begin
  moveStr:=vwinboardConn.coordToString(AFrom,ATo,vChessGame.PreviousMove.PieceMoved,vChessGame.PreviousMove.PieceEaten);

  vwinboardConn.tellMove(moveStr);
  compMove:=vwinboardConn.engineMove;
  vChessGame.MovePiece(CompMove[1],CompMove[2]);
end;

procedure TWinboardChessModule.PrepareForGame;
var i: integer;
    CompMove: moveInCoord;
begin
  vwinboardConn.startEngine(editEnginePatch.text);
  if not vChessGame.FirstPlayerIsWhite then
  begin
    vwinboardConn.tellMove('go');
    compMove:=vwinboardConn.engineMove;
    vChessGame.MovePiece(CompMove[1],CompMove[2]);
  end;

end;

initialization
  RegisterChessModule(TWinboardChessModule.Create);
finalization
  vwinboardConn.stopEngine;
end.