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

namespace Bro.Common.Helper
{
    public class NoticedList<T> : List<T> where T : class
    {
        public Action OnItemChanged;

        public Action<List<T>> OnItemChangedWithItemInfo;

        public Action<NoticedList<T>> OnItemChangedWithSelf;

        public new T this[int index]
        {
            get
            {
                if (index >= 0 && index < this.Count)
                {
                    return base[index];
                }
                else
                {
                    return null;
                }

            }
            set
            {
                if (base[index] != value)
                {
                    base[index] = value;
                    OnItemChanged?.Invoke();
                    OnItemChangedWithItemInfo?.Invoke(new List<T>() { value });
                    OnItemChangedWithSelf?.Invoke(this);
                }
            }
        }

        public new void Add(T item)
        {
            base.Add(item);
            OnItemChanged?.Invoke();
            OnItemChangedWithItemInfo?.Invoke(new List<T>() { item });
            OnItemChangedWithSelf?.Invoke(this);
        }

        public new void AddRange(IEnumerable<T> collection)
        {
            base.AddRange(collection);
            OnItemChanged?.Invoke();
            OnItemChangedWithItemInfo?.Invoke(collection.ToList());
            OnItemChangedWithSelf?.Invoke(this);
        }

        public new void Clear()
        {
            base.Clear();
            OnItemChanged?.Invoke();
            OnItemChangedWithSelf?.Invoke(this);
        }

        public new void Insert(int index, T item)
        {
            base.Insert(index, item);
            OnItemChanged?.Invoke();
            OnItemChangedWithItemInfo?.Invoke(new List<T>() { item });
            OnItemChangedWithSelf?.Invoke(this);
        }

        public new void InsertRange(int index, IEnumerable<T> collection)
        {
            base.InsertRange(index, collection);
            OnItemChanged?.Invoke();
            OnItemChangedWithItemInfo?.Invoke(collection.ToList());
            OnItemChangedWithSelf?.Invoke(this);
        }

        public new bool Remove(T item)
        {
            bool flag = base.Remove(item);

            if (flag)
            {
                OnItemChanged?.Invoke();
                OnItemChangedWithItemInfo?.Invoke(new List<T>() { item });
                OnItemChangedWithSelf?.Invoke(this);
            }

            return flag;
        }

        public new int RemoveAll(Predicate<T> match)
        {
            int i = base.RemoveAll(match);
            if (i > 0)
            {
                OnItemChanged?.Invoke();
                OnItemChangedWithSelf?.Invoke(this);
            }

            return i;
        }

        public new void RemoveAt(int index)
        {
            base.RemoveAt(index);
            OnItemChanged?.Invoke();
            OnItemChangedWithSelf?.Invoke(this);
        }

        public new void RemoveRange(int index, int count)
        {
            base.RemoveRange(index, count);
            OnItemChanged?.Invoke();
            OnItemChangedWithSelf?.Invoke(this);
        }
    }
}