using System.Collections.Generic;

using Delta.Engine;

using Delta.Scenes.Enums;

using Delta.Utilities.Datatypes;

using NUnit.Framework;



namespace Delta.Scenes.UserInterfaces.Controls

{

	/// <summary>

	/// Dropdownbox

	/// </summary>

	public class TODODropdownBox : TextBox

	{

		#region Constants

		/// <summary>

		/// The name of the class which is saved in the content data to

		/// describe and "detect" the data in the loading code again.

		/// </summary>

		private const string SavingClassName = "UIDropdownBox";



		/// <summary>

		/// The current version of the implementation of this class.

		/// </summary>

		private const int WorkingVersion = 1;

		#endregion



		#region Delegates

		/// <summary>

		/// The delegate declaration for the "DropdownBox.IndexChanged" event.

		/// </summary>

		/// <param name="newIndex"></param>

		public delegate void SelectedIndexChangedDelegate(int newIndex);

		#endregion



		#region Items (Public)

		/// <summary>

		/// Items

		/// </summary>

		public object[] Items

		{

			get

			{

				return items;

			}

			set

			{

				items = value;



				//for (int i = 0; i < itemsLabel.Count; i++)

				//{

				//  itemsLabel[i].Dispose();

				//}

				//itemsLabel.Clear();



				//isDropDownListVisible = false;



				//if (items == null ||

				//    items.Length == 0)

				//{

				//  SelectedIndex = -1;

				//  return;

				//} // if



				//for (int i = 0; i < Items.Length; i++)

				//{

				//  Label item = new Label

				//  {

				//    IsAutoSizing = false,

				//    IsTextClipped = true,

				//    Text = Items[i].ToString()

				//  };



				//  item.Clicked += OnItemClicked;



				//  itemsLabel.Add(item);

				//  Add(item);

				//} // for



				SelectedIndex = 0;

			} // set

		}

		#endregion



		#region SelectedItem (Public)

		/// <summary>

		/// Selected item

		/// </summary>

		public object SelectedItem

		{

			get;

			private set;

		}

		#endregion



		#region SelectedIndex (Public)

		/// <summary>

		/// Selected index

		/// </summary>

		public int SelectedIndex

		{

			get

			{

				return selectedIndex;

			}

			set

			{

				selectedIndex = value;



				if (selectedIndex < 0)

				{

					SelectedItem = "'null'";

				}

				else

				{

					SelectedItem = Items[selectedIndex];

				}



				// Set the new text

				Text = SelectedItem.ToString();



				// Call the event

				if (SelectionChanged != null)

				{

					SelectionChanged.Invoke(selectedIndex);

				}

			} // set

		}

		#endregion



		#region Protected



		#region ExpanderArea (Protected)

		/// <summary>

		/// Expander area

		/// </summary>

		protected internal Rectangle ExpanderArea

		{

			get

			{

				// Calc rotation

				Size size = new Size(Size.Height);

				Point pos = DrawArea.TopRight - DrawArea.Center;

				pos += size * 0.5f;

				pos.Rotate(Rotation);

				pos -= size * 0.5f;

				pos += DrawArea.Center;



				return new Rectangle(pos, size);

			} // get

		}

		#endregion



		#endregion



		#region Private



		#region items (Private)

		/// <summary>

		/// Items

		/// </summary>

		private object[] items;

		#endregion



		#region selectedIndex (Private)

		/// <summary>

		/// Selected index

		/// </summary>

		private int selectedIndex;

		#endregion



		#region itemsLabel (Private)

		/// <summary>

		/// Items label

		/// </summary>

		private readonly List<Label> itemsLabel;

		#endregion



		#endregion



		#region Constructors

		/// <summary>

		/// Create dropdownbox

		/// </summary>

		public TODODropdownBox()

		{

			itemsLabel = new List<Label>();

			IsReadOnly = true;

			Items = new object[0];

		}

		#endregion



		#region SelectionChanged (Event)

		/// <summary>

		/// Occurs every time the selected object resp index is changed.

		/// </summary>

		public event SelectedIndexChangedDelegate SelectionChanged;

		#endregion



		#region Methods (Private)



		#region ShowDropDownList

		/// <summary>

		/// Draw drop down list

		/// </summary>

		private void ShowDropDownList()

		{

			if (Items == null)

			{

				return;

			}



			float rotation = Rotation;

			Rotation = 0;



			// Add the items as labels in this ui control

			//for (int i = 0; i < Items.Length; i++)

			//{

			//	Label item = new Label();

			//	AddChild(item);

			//	item.IsAutoSizing = false;

			//	item.IsTextClipped = true;

			//	item.Text = Items[i].ToString();

			//	item.Size = new Size(Size.Width, TextFont.LineHeight);



			//	Point pos = new Point(0, Size.Height + item.Size.Height * i) -

			//		DrawingArea.Center;

			//	pos += item.Size * 0.5f;

			//	pos.Rotate(Rotation);

			//	pos -= item.Size * 0.5f;

			//	pos += DrawingArea.Center;



			//	item.LocalPosition = pos;



			//	item.Clicked += new ControlEvent(OnItemClicked);



			//	itemsLabel.Add(item);

			//} // for



			for (int i = 0; i < itemsLabel.Count; i++)

			{

				itemsLabel[i].Size = new Size(Size.Width, TextFont.LineHeight);



				Point pos = new Point(0, Size.Height + itemsLabel[i].Size.Height * i) -

				            DrawArea.Center;

				pos += itemsLabel[i].Size * 0.5f;

				pos.Rotate(Rotation);

				pos -= itemsLabel[i].Size * 0.5f;

				pos += DrawArea.Center;



				itemsLabel[i].LocalPosition = pos;



				//AddChild(itemsLabel[i]);

				//itemsLabel[i].IsEnabled = true;

				//itemsLabel[i].IsVisible = true;



				itemsLabel[i].State = ElementState.Enabled;

			} // for



			Rotation = rotation;

			// ToEval:

			//isDropDownListVisible = true;

		}

		#endregion



		// ShowDropDownList()



		#region HideDropDownList

		/// <summary>

		/// Hide drop down list

		/// </summary>

		private void HideDropDownList()

		{

			if (itemsLabel == null)

			{

				return;

			}



			// Destroy all item labels

			for (int i = 0; i < itemsLabel.Count; i++)

			{

				//itemsLabel[i].Destroy();

				//itemsLabel[i].IsEnabled = false;

				//itemsLabel[i].IsVisible = false;

				itemsLabel[i].State = ElementState.Invisible;

			} // for

			//itemsLabel.Clear();



			// ToEval:

			//isDropDownListVisible = false;

		}

		#endregion



		#endregion



		/// <summary>

		/// Tests for DropdownBox controls

		/// </summary>

		[Category("Visual")]

		internal class DropdownBoxTests

		{

			#region DisplayDropdownbox (Static)

			/// <summary>

			/// Dropdownbox label

			/// </summary>

			[Test]

			public static void DisplayDropdownbox()

			{

				// Init the Dropdownbox

				TODODropdownBox testDropdownBox = new TODODropdownBox

				{

					Items = new[]

					{

						"Hallo",

						"Delta",

						"blaaaaaaaaaaaaaaaa!!!"

					},

					LocalArea = new Rectangle(0.25f, 0.25f, 0.4f, 0.075f),

				};



				Screen testScene = new Screen();

				testScene.Add(testDropdownBox);

				// Open now the scene to "activate" for the test

				testScene.Open();



				// Just start the game screen that has been setup so far.

				Application.Start();

			}

			#endregion



			#region DisplayNonAutoSizeDropdownbox (Static)

			/// <summary>

			/// Display non auto size dropdownbox

			/// </summary>

			[Test]

			public static void DisplayNonAutoSizeDropdownbox()

			{

				// Init the Dropdownbox

				TODODropdownBox testDropdownBox = new TODODropdownBox

				{

					Items = new[]

					{

						"Hallo",

						"Delta",

						"blaaaaaaaaaaaaaaaa!!!"

					},

					LocalArea = new Rectangle(0.25f, 0.25f, 0.2f, 0.05f),

				};



				Screen testScene = new Screen();

				testScene.Add(testDropdownBox);

				// Open now the scene to "activate" for the test

				testScene.Open();



				Application.Start();

			}

			#endregion



			#region DisplayRotatedDropdownbox (Static)

			/// <summary>

			/// Display rotated dropdownbox

			/// </summary>

			[Test]

			public static void DisplayRotatedDropdownbox()

			{

				// Init the Dropdownbox

				TODODropdownBox testDropdownBox = new TODODropdownBox

				{

					Items = new[]

					{

						"Hallo",

						"Delta",

						"blaaaaaaaaaaaaaaaa!!!"

					},

					LocalArea = new Rectangle(0.25f, 0.25f, 0.4f, 0.075f),

					Rotation = 45,

				};



				Screen testScene = new Screen();

				testScene.Add(testDropdownBox);

				// Open now the scene to "activate" for the test

				testScene.Open();



				Application.Start();

			}

			#endregion

		}

	}

}