// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms.Design;
 
namespace System.Windows.Forms;
 
public partial class PropertyGrid
{
    public class PropertyTabCollection : ICollection
    {
        private readonly PropertyGrid _ownerPropertyGrid;
 
        internal PropertyTabCollection(PropertyGrid ownerPropertyGrid)
        {
            _ownerPropertyGrid = ownerPropertyGrid.OrThrowIfNull();
        }
 
        /// <summary>
        ///  Retrieves the number of member attributes.
        /// </summary>
        public int Count
        {
            get
            {
                if (_ownerPropertyGrid is null)
                {
                    return 0;
                }
 
                return _ownerPropertyGrid._tabs.Count;
            }
        }
 
        object ICollection.SyncRoot => this;
 
        bool ICollection.IsSynchronized => false;
 
        /// <summary>
        ///  Retrieves the member attribute with the specified index.
        /// </summary>
        public PropertyTab this[int index]
        {
            get
            {
                if (_ownerPropertyGrid is null)
                {
                    throw new InvalidOperationException(SR.PropertyGridPropertyTabCollectionReadOnly);
                }
 
                return _ownerPropertyGrid._tabs[index].Tab;
            }
        }
 
        public void AddTabType(Type propertyTabType)
        {
            if (_ownerPropertyGrid is null)
            {
                throw new InvalidOperationException(SR.PropertyGridPropertyTabCollectionReadOnly);
            }
 
            _ownerPropertyGrid.AddTab(propertyTabType, PropertyTabScope.Global);
        }
 
        public void AddTabType(Type propertyTabType, PropertyTabScope tabScope)
        {
            if (_ownerPropertyGrid is null)
            {
                throw new InvalidOperationException(SR.PropertyGridPropertyTabCollectionReadOnly);
            }
 
            _ownerPropertyGrid.AddTab(propertyTabType, tabScope);
        }
 
        /// <summary>
        ///  Clears the tabs of the given scope or smaller.
        ///  tabScope must be PropertyTabScope.Component or PropertyTabScope.Document.
        /// </summary>
        public void Clear(PropertyTabScope tabScope)
        {
            if (_ownerPropertyGrid is null)
            {
                throw new InvalidOperationException(SR.PropertyGridPropertyTabCollectionReadOnly);
            }
 
            _ownerPropertyGrid.ClearTabs(tabScope);
        }
 
        void ICollection.CopyTo(Array dest, int index)
        {
            if (_ownerPropertyGrid is null)
            {
                return;
            }
 
            if (_ownerPropertyGrid._tabs.Count > 0)
            {
                Array.Copy(
                    _ownerPropertyGrid._tabs.Select(i => i.Tab).ToArray(),
                    0,
                    dest,
                    index,
                    _ownerPropertyGrid._tabs.Count);
            }
        }
 
        /// <summary>
        ///  Creates and retrieves a new enumerator for this collection.
        /// </summary>
        public IEnumerator GetEnumerator()
        {
            if (_ownerPropertyGrid is null)
            {
                return Array.Empty<PropertyTab>().GetEnumerator();
            }
 
            return _ownerPropertyGrid._tabs.Select(i => i.Tab).GetEnumerator();
        }
 
        public void RemoveTabType(Type propertyTabType)
        {
            if (_ownerPropertyGrid is null)
            {
                throw new InvalidOperationException(SR.PropertyGridPropertyTabCollectionReadOnly);
            }
 
            _ownerPropertyGrid.RemoveTab(propertyTabType);
        }
    }
}