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

namespace UniversalEditor.UserInterface
{
	public class MenuBar
	{
		private MenuItem.MenuItemCollection mvarItems = new MenuItem.MenuItemCollection();
		public MenuItem.MenuItemCollection Items { get { return mvarItems; } }
	}

	public abstract class MenuItem
	{
		public class MenuItemCollection
			: System.Collections.ObjectModel.Collection<MenuItem>
		{
			private System.Collections.Generic.Dictionary<string, MenuItem> itemsByName = new Dictionary<string, MenuItem>();

			public ActionMenuItem Add(string name, string title)
			{
				return Add(name, title, null);
			}
			public ActionMenuItem Add(string name, string title, EventHandler onClick)
			{
				return Add(name, title, onClick, Count);
			}
			public ActionMenuItem Add(string name, string title, int position)
			{
				return Add(name, title, null, position);
			}
			public ActionMenuItem Add(string name, string title, EventHandler onClick, int position)
			{
				ActionMenuItem item = new ActionMenuItem(name, title);
				if (onClick != null)
				{
					item.Click += onClick;
				}
				item.Position = position;
				Add(item);
				return item;
			}
			public SeparatorMenuItem AddSeparator()
			{
				return AddSeparator(Count);
			}
			public SeparatorMenuItem AddSeparator(int position)
			{
				SeparatorMenuItem item = new SeparatorMenuItem();
				item.Position = position;
				item.Name = "separator__" + (Count + 1).ToString();
				Add(item);
				return item;
			}

			public MenuItem this[string name]
			{
				get
				{
					return itemsByName[name];
				}
			}

			public bool Contains(string name)
			{
				return itemsByName.ContainsKey(name);
			}
			public bool Remove(string name)
			{
				if (itemsByName.ContainsKey(name))
				{
					base.Remove(itemsByName[name]);
					return true;
				}
				return false;
			}

			protected override void InsertItem(int index, MenuItem item)
			{
				item.mvarParent = this;
				base.InsertItem(index, item);
				itemsByName.Add(item.Name, item);
			}
			protected override void RemoveItem(int index)
			{
				this[index].mvarParent = null;
				itemsByName.Remove(this[index].Name);
				base.RemoveItem(index);
			}

			internal void UpdateName(MenuItem item, string oldName)
			{
				itemsByName.Remove(oldName);
				itemsByName.Add(item.Name, item);
			}
		}

		private List<object> mvarNativeControls = new List<object>();
		public List<object> NativeControls { get { return mvarNativeControls; } }

		private MenuItemCollection mvarParent = null;

		private string mvarName = String.Empty;
		public string Name
		{
			get { return mvarName; }
			set
			{
				string oldName = mvarName; mvarName = value;
				if (mvarParent != null)
				{
					mvarParent.UpdateName(this, oldName);
				}
			}
		}

		private int mvarPosition = -1;
		public int Position { get { return mvarPosition; } set { mvarPosition = value; } }

		private bool mvarEnabled = true;
		public bool Enabled
		{
			get { return mvarEnabled; }
			set
			{
				mvarEnabled = value;
				foreach (object NativeControl in mvarNativeControls)
				{
					HostApplication.CurrentWindow.RefreshCommand(NativeControl);
				}
			}
		}

		private bool mvarVisible = true;
		public bool Visible { get { return mvarVisible; }
			set
			{
				mvarVisible = value;
				foreach (object NativeControl in mvarNativeControls)
				{
					HostApplication.CurrentWindow.RefreshCommand(NativeControl);
				}
			}
		}
	}

	public class ActionMenuItem : MenuItem
	{
		private string mvarTitle = String.Empty;
		public string Title { get { return mvarTitle; } set { mvarTitle = value; } }

		private MenuItem.MenuItemCollection mvarItems = new MenuItem.MenuItemCollection();
		public MenuItem.MenuItemCollection Items { get { return mvarItems; } }

		private CommandDisplayStyle mvarDisplayStyle = CommandDisplayStyle.ImageOnly;
		public CommandDisplayStyle DisplayStyle { get { return mvarDisplayStyle; } set { mvarDisplayStyle = value; } }

		public event EventHandler Click;

		public ActionMenuItem(string title)
		{
			base.Name = title;
			mvarTitle = title;
		}
		public ActionMenuItem(string name, string title)
		{
			base.Name = name;
			mvarTitle = title;
		}


		public void OnClick(EventArgs e)
		{
			if (Click != null)
			{
				Click(this, e);
			}
		}
	}
	public class SeparatorMenuItem : MenuItem
	{

	}
	public class PlaceholderMenuItem : MenuItem
	{
		private string mvarPlaceholderID = String.Empty;
		public string PlaceholderID { get { return mvarPlaceholderID; } set { mvarPlaceholderID = value; } }

		public PlaceholderMenuItem(string placeholderID)
		{
			mvarPlaceholderID = placeholderID;
		}
	}
}