using System;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Markup;

using Microsoft.Research.DynamicDataDisplay.Charts;

using Microsoft.Research.DynamicDataDisplay.Common.Auxiliary;



namespace Microsoft.Research.DynamicDataDisplay

{

	/// <summary>

	/// Represents a title of horizontal axis. Can be placed from top or bottom of Plotter.

	/// </summary>

	public class HorizontalAxisTitle : ContentControl, IPlotterElement

	{

		/// <summary>

		/// Initializes a new instance of the <see cref="HorizontalAxisTitle"/> class.

		/// </summary>

		public HorizontalAxisTitle()

		{

			FontSize = 16;

			HorizontalAlignment = HorizontalAlignment.Center;

		}



		/// <summary>

		/// Initializes a new instance of the <see cref="HorizontalAxisTitle"/> class.

		/// </summary>

		/// <param name="content">The content.</param>

		public HorizontalAxisTitle(object content)

			: this()

		{

			Content = content;

		}



		private Plotter plotter;

		public Plotter Plotter

		{

			get { return plotter; }

		}



		public void OnPlotterAttached(Plotter plotter)

		{

			this.plotter = plotter;

			AddToPlotter();

		}



		public void OnPlotterDetaching(Plotter plotter)

		{

			RemoveFromPlotter();

			this.plotter = null;

		}



		private Panel GetHostPanel(Plotter plotter)

		{

			if (placement == AxisPlacement.Bottom)

				return plotter.BottomPanel;

			else

				return plotter.TopPanel;

		}



		private int GetInsertPosition(Panel panel)

		{

			if (placement == AxisPlacement.Bottom)

				return panel.Children.Count;

			else

				return 0;

		}



		private AxisPlacement placement = AxisPlacement.Bottom;

		/// <summary>

		/// Gets or sets the placement of axis title.

		/// </summary>

		/// <value>The placement.</value>

		public AxisPlacement Placement

		{

			get { return placement; }

			set

			{

				if (!value.IsBottomOrTop())

					throw new ArgumentException(String.Format("HorizontalAxisTitle only supports Top and Bottom values of AxisPlacement, you passed '{0}'", value), "Placement");



				if (placement != value)

				{

					if (plotter != null)

					{

						RemoveFromPlotter();

					}



					placement = value;



					if (plotter != null)

					{

						AddToPlotter();

					}

				}

			}

		}



		private void RemoveFromPlotter()

		{

			var oldPanel = GetHostPanel(plotter);

			oldPanel.Children.Remove(this);

		}



		private void AddToPlotter()

		{

			var hostPanel = GetHostPanel(plotter);

			var index = GetInsertPosition(hostPanel);

			hostPanel.Children.Insert(index, this);

		}

	}

}