using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp.Menu
{
    internal abstract partial class Entry
    {
        public class EntryStep
        {
            private Type _entryType;

            public string Description { get; private set; }
            public string? Input { get; private set; }

            internal EntryStep(string description, Type type)
            {
                Description = description;
                Input = null;
                _entryType = type;
            }

            public object GetEntry()
            {
                Input = Console.ReadLine();

                if (Input is null)
                    throw new ArgumentException("Error: input is null.");

                try
                {
                    if (_entryType == typeof(string))
                        return Input;
                    if (_entryType == typeof(int))
                        return Int32.Parse(Input);
                    if (_entryType == typeof(DateTime))
                        return DateTime.Parse(Input);
                }
                catch (FormatException fe)
                {
                    Console.Error.WriteLine(fe);
                }

                throw new NotImplementedException("Error: parse of this type is not implemented.");
            }
        }
    }
}