/// <summary>
/// Gets a command from the user.
/// </summary>
/// <param name="moveNumber">
/// The current move number.
/// </param>
/// <param name="positions">
/// The number of code positions.
/// </param>
/// <param name="colors">
/// The maximum number of code colors.
/// </param>
/// <returns>
/// The entered command and guess (if applicable).
/// </returns>
public static (Command command, Code?guess) GetCommand(int moveNumber, int positions, int colors)
{
while (true)
{
View.PromptGuess(moveNumber);
var input = Console.ReadLine();
if (input is null)
{
Environment.Exit(0);
}
switch (input.ToUpperInvariant())
{
case "BOARD":
return(Command.ShowBoard, null);
case "QUIT":
return(Command.Quit, null);
default:
if (input.Length != positions)
{
View.NotifyBadNumberOfPositions();
}
else
if (input.FindFirstIndex(c => !TranslateColor(c).HasValue) is int invalidPosition)
{
View.NotifyInvalidColor(input[invalidPosition]);
}
else
{
return(Command.MakeGuess, new Code(input.Select(c => TranslateColor(c) !.Value)));
}
break;
}
}
}