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

namespace CV5
{
    class Slozka : Prvek, IEnumerable
    {
        private String nazev;

        public Slozka(String nazev)
        {
            this.nazev = nazev;
        }

        public override void tisk(int level)
        {
            for (int i = 0; i < level; i++)
                Console.Write("  ");
            Console.WriteLine(nazev);
            foreach (Prvek prvk in this.prvky)
            {
                prvk.tisk(level+1);
            }
        }



        public override string getText()
        {
            return this.nazev;
        }




        public IEnumerator GetEnumerator()
        {
            return new SlozkaEnumerator(prvky);
        }
    }


    class SlozkaEnumerator : IEnumerator {

        private List<Prvek> obsah;
        private int index = -1;
        public SlozkaEnumerator(List<Prvek> obsah)
        {
            this.obsah = obsah;
        }

        public object Current
        {

            get { return obsah[index]; }
        }

        public bool MoveNext()
        {
            index++;
            return index < obsah.Count;
        }

        public void Reset()
        {
            this.index = -1;
        }
    }
}