using System.Text.RegularExpressions;

namespace Dungeoneer {

	public sealed class Command {

		public static void Roll(IList<string> args) {
			//	don't do anything with empty expressions
			if(args.Count == 0)
				return;

			//	pass to subcommands
			var first = args[0];
			if(Program.RollMacros.ContainsKey(first)) {
				Program.RollMacros[first](args);
				return;
			}

			//	create new parsed expression object and pretty-print
			var roll = new RollExpression(args);
			var result = roll.Result;
			if(result == null)
				Console.WriteLine("invalid expression");
			else
				Console.WriteLine($"{roll.Print}\n => {result}");
		}



	}

}