/* pieces.js – simple data holders + starting layout */
function Piece(kind, colour) {
  this.kind   = kind;                 // "pawn" etc.
  this.colour = colour;               // "white"/"black"
  this.sprite = colour + '_' + kind;  // for draw2d.image
  this.captured = false;
  this.coord    = [0,0];
}
Piece.prototype.toString = function () {
  return this.colour.charAt(0) + this.kind.charAt(0).toUpperCase();
};

function startingPosition(grid) {
  var W = 'white', B = 'black', x;

  // pawns
  for (x = 0; x < 8; x++) {
    grid.add(new Piece('pawn', W), [x, 6]);
    grid.add(new Piece('pawn', B), [x, 1]);
  }
  // major pieces
  var back = ['rook','knight','bishop','queen','king','bishop','knight','rook'];
  for (x = 0; x < 8; x++) {
    grid.add(new Piece(back[x], W), [x, 7]);
    grid.add(new Piece(back[x], B), [x, 0]);
  }
}

return { Piece, startingPosition };