using System.Collections;
using System.Collections.Generic;

namespace System.Windows.Forms
{
    public partial class ListView
    {
        public class SelectedListViewItemCollection : WrappedCollection
        {
            private ListView owner;
            private List<ListViewItem> selectedItems;
            
            protected override IList InnerList => selectedItems;

            public ListViewItem this[int index] => (ListViewItem)InnerList[index];

            internal void InternalAdd(ListViewItem item) => selectedItems.Add(item);
            internal bool InternalRemove(ListViewItem item) => selectedItems.Remove(item);
            internal void InternalClear() => selectedItems.Clear();

            public void Clear()
            {
                InnerList.Clear();
                owner.control.SelectedItems.Clear();
            }
            
            public bool Contains(ListViewItem item) => InnerList.Contains(item);
            
            public int IndexOf(ListViewItem item) => InnerList.IndexOf(item);

            internal SelectedListViewItemCollection(ListView owner)
            {
                this.owner = owner;
                selectedItems = new();
            }
        }
    }
}