using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Input;
using System.Collections.ObjectModel;
using BuzzGUI.Interfaces;

namespace BuzzGUI.Common
{
    public class MenuItemVM : IMenuItem
    {
        public string Text { get; set; }
		public int ID { get; set; }
		public ICommand Command { get; set; }
        public object CommandParameter { get; set; }
        public IEnumerable<IMenuItem> Children { get; set; }
		public bool IsSeparator { get; set; }
		public bool IsLabel { get; set; }
		public bool IsCheckable { get; set; }
		public bool IsDefault { get; set; }
		public bool StaysOpenOnClick { get; set; }
		public string GestureText { get; set; }

		bool isEnabled = true;
		public bool IsEnabled { get { return isEnabled; } set { isEnabled = value; } }

		bool isChecked;
		public bool IsChecked 
		{
			get { return isChecked; }
			set
			{
				if (value != isChecked)
				{
					isChecked = value;
					PropertyChanged.Raise(this, "IsChecked");

					if (checkGroup != null && isChecked)
						checkGroup.UncheckAllExcept(this);
						
				}
			}
		}

		public class Group
		{
			List<MenuItemVM> items = new List<MenuItemVM>();

			internal void Add(MenuItemVM i)
			{
				items.Add(i);
			}

			internal void Remove(MenuItemVM i)
			{
				items.Remove(i);
			}

			internal void UncheckAllExcept(MenuItemVM x)
			{
				foreach (var i in items)
				{
					if (i != x)	i.IsChecked = false;
				}
			}
		}

		Group checkGroup;
		public Group CheckGroup
		{
			get { return checkGroup; }
			set
			{
				if (checkGroup != null) checkGroup.Remove(this);
				checkGroup = value;
				checkGroup.Add(this);
			}
		}

		#region INotifyPropertyChanged Members

		public event System.ComponentModel.PropertyChangedEventHandler PropertyChanged;

		#endregion
	}
}