using System;
using static System.Console;

namespace ProtosXdigitalDemo
{
    internal class CommandLineParser
    {
        public string? RecipeName { get; }
        public int TimesToRepeat { get; }

        private CommandLineParser(string? recipeName, int timesToRepeat)
        {
            RecipeName = recipeName;
            TimesToRepeat = timesToRepeat;
        }

        public static CommandLineParser Parse(string[] args)
        {
            return args.Length switch
            {
                0 => new CommandLineParser(null, 0),
                1 => new CommandLineParser(args[0], 0),
                2 => new CommandLineParser(args[0], Convert.ToInt32(args[1])),
                _ => ExitOnTooManyArgs()
            };
        }

        private static CommandLineParser ExitOnTooManyArgs()
        {
            WriteLine("Too many command-line arguments; exiting.");
            Environment.Exit(Data.MachineState.failureCode[2]);
            throw new OperationCanceledException();
        }
    }
}