var Piece = use('examples/chess/pieces').Piece

function serialize(grid, turn) {
  var pieces = []
  grid.each(function(p) {
    pieces[] = {kind: p.kind, colour: p.colour, x: p.coord[0], y: p.coord[1], id: p._id}
  })
  return {type: "state", turn: turn, pieces: pieces}
}

function deserialize(state, grid, board_view) {
  var x = 0, y = 0
  for (y = 0; y < 8; y++) {
    for (x = 0; x < 8; x++) {
      grid.cells[y][x] = []
    }
  }

  var i = 0, pd = null, p = null
  for (i = 0; i < length(state.pieces); i++) {
    pd = state.pieces[i]
    p = Piece(pd.kind, pd.colour)
    p._id = pd.id
    grid.add(p, [pd.x, pd.y])
  }

  board_view.rebuild_pieces(grid)
  return state.turn
}

return {serialize: serialize, deserialize: deserialize}