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

namespace Common.Infrastructure.ViewModels
{
	public class ListItemViewModel : ListItemViewModel<object>
	{
		public ListItemViewModel()
			: this(String.Empty)
		{
		}
		public ListItemViewModel(string displayText)
			: this(displayText, displayText)
		{
		}
		public ListItemViewModel(string displayText, object data)
			: base(displayText, data)
		{
		}
	}
	public class ListItemViewModel<TData> : INotifyPropertyChanged, IEqualityComparer<TData>
	{
		public override bool Equals(object obj)
		{
			if (obj == null) return false;
			var other = obj as ListItemViewModel<TData>;
			if (other == null) return false;
			if (!(Equals(this.Data, other.Data))) return false;
			return true;
		}

		public bool Equals(TData x, TData y)
		{
			return EqualityComparer<TData>.Default.Equals(x, y);
		}
		public override int GetHashCode()
		{
			return base.GetHashCode();
		}
		public int GetHashCode(TData obj)
		{
			return obj.GetHashCode();
		}

		public ListItemViewModel()
			: this(String.Empty, default(TData))
		{
		}
		public ListItemViewModel(string displayText)
			: this(displayText, default(TData))
		{
		}
		public ListItemViewModel(string displayText, TData data)
		{
			_displayText = displayText;
			_data = data;
		}
		private string _displayText;
		public virtual string DisplayText
		{
			get
			{
				return _displayText;
			}
			set
			{
				_displayText = value;
				RaisePropertyChanged("DisplayText");
			}
		}
		private TData _data;
		public virtual TData Data
		{
			get
			{
				return _data;
			}
			set
			{
				_data = value;
				RaisePropertyChanged("Data");
			}
		}

		public event PropertyChangedEventHandler PropertyChanged;
		protected void RaisePropertyChanged(string propertyName)
		{
			if (PropertyChanged == null) return;
			PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
		}




	}

}