// Play asks for input from an external source until a valid move is given.
func (human *HumanAgent) Play(
referee *mancala.Referee,
player mancala.PlayerIndex,
) (mancala.HouseIndex, error) {
move := mancala.HouseIndex(-1)
var moveLine string
for move == -1 {
fmt.Printf("%s, make a move:\n", strings.Title(player.String()))
fmt.Scanf("%s", &moveLine)
fmt.Println()
parsedMove, err := strconv.Atoi(moveLine)
if err != nil {
fmt.Println("Input must be an integer.")
fmt.Println()
moveLine = ""
} else if _, err := referee.SimulateMove(
player,
mancala.HouseIndex(parsedMove),
); err != nil {
fmt.Printf("Illegal move: %v.\n", err)
fmt.Println()
moveLine = ""
move = -1
} else {
move = mancala.HouseIndex(parsedMove)
}
}
return move, nil
}
