using System;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.Design;

using System.ComponentModel;

using System.ComponentModel.Design;



namespace MetaBuilders.WebControls

{



	/// <summary>

	/// Displays the results of a poll as a bar graph list.

	/// </summary>

	internal class PollResultsList : System.Web.UI.WebControls.ListControl

	{



		#region Properties



		/// <summary>

		/// Gets the style of bars in the list.

		/// </summary>

		[

		Category( "Style" ),

		DesignerSerializationVisibility( DesignerSerializationVisibility.Content ),

		NotifyParentProperty( true ),

		PersistenceMode( PersistenceMode.InnerProperty ),

		]

		public virtual BarStyle BarStyle

		{

			get

			{

				if ( barStyle == null )

				{

					barStyle = new BarStyle();

					//					barStyle.BorderWidth = Unit.Pixel( 1 );

					//					barStyle.Height = Unit.Pixel( 10 );

					if ( IsTrackingViewState )

					{

						( (IStateManager)barStyle ).TrackViewState();

					}

				}

				return barStyle;

			}

		}

		private BarStyle barStyle;







		/// <summary>

		/// Gets or sets the <see cref="ResultDisplayType"/> of the bars in the list.

		/// </summary>

		/// <remarks>

		/// With <see cref="ResultDisplayType.Percentage"/>, the widths of the bars will add up to width of the control as a whole.

		/// With <see cref="ResultDisplayType.Count"/>, the item with the highest count will fill the width of the control.

		/// </remarks>

		[

		Category( "Appearance" ),

		Description( "Gets or sets the ResultDisplayType of the bars in the list." ),

		Bindable( true ),

		DefaultValue( ResultDisplayType.Count ),

		]

		public virtual ResultDisplayType BarDisplay

		{

			get

			{

				Object savedState = this.ViewState["BarDisplay"];

				if ( savedState != null )

				{

					return (ResultDisplayType)savedState;

				}

				return ResultDisplayType.Count;

			}

			set

			{

				if ( !Enum.IsDefined( typeof( ResultDisplayType ), value ) )

				{

					throw new InvalidEnumArgumentException( "value", (Int32)value, typeof( ResultDisplayType ) );

				}

				this.ViewState["BarDisplay"] = value;

			}

		}



		/// <summary>

		/// Gets or sets the <see cref="ResultDisplayType"/> of the vote count display in the list.

		/// </summary>

		/// <remarks>

		/// With <see cref="ResultDisplayType.Percentage"/>, the vote count of each item will be the percentage of votes which that answer received.

		/// With <see cref="ResultDisplayType.Count"/>, the vote count will show the number of votes which that answer received.

		/// </remarks>

		[

		Category( "Appearance" ),

		Description( "Gets or sets the ResultDisplayType of the vote count display in the list." ),

		Bindable( true ),

		DefaultValue( ResultDisplayType.Percentage ),

		]

		public virtual ResultDisplayType VoteCountDisplay

		{

			get

			{

				Object savedState = this.ViewState["VoteCountDisplay"];

				if ( savedState != null )

				{

					return (ResultDisplayType)savedState;

				}

				return ResultDisplayType.Percentage;

			}

			set

			{

				if ( !Enum.IsDefined( typeof( ResultDisplayType ), value ) )

				{

					throw new InvalidEnumArgumentException( "value", (Int32)value, typeof( ResultDisplayType ) );

				}

				this.ViewState["VoteCountDisplay"] = value;

			}

		}



		#endregion



		#region ViewState



		/// <summary>

		/// Overrides <see cref="Control.LoadViewState"/>.

		/// </summary>

		/// <param name="savedState"></param>

		protected override void LoadViewState( object savedState )

		{

			if ( savedState == null )

			{

				base.LoadViewState( null );

				return;

			}



			Pair pair = savedState as Pair;

			if ( pair != null )

			{

				base.LoadViewState( pair.First );

				if ( pair.Second != null )

				{

					( (IStateManager)this.BarStyle ).LoadViewState( pair.Second );

				}

			}

		}



		/// <summary>

		/// Overrides <see cref="Control.SaveViewState"/>.

		/// </summary>

		/// <returns></returns>

		protected override object SaveViewState()

		{

			Pair pair = new Pair();

			pair.First = base.SaveViewState();

			if ( this.barStyle != null )

			{

				pair.Second = ( (IStateManager)this.barStyle ).SaveViewState();

			}

			if ( pair.First == null && pair.Second == null )

			{

				return null;

			}

			return pair;

		}



		/// <summary>

		/// Overrides <see cref="TrackViewState"/>.

		/// </summary>

		protected override void TrackViewState()

		{

			base.TrackViewState();

			if ( this.barStyle != null )

			{

				( (IStateManager)barStyle ).TrackViewState();

			}

		}



		#endregion



		#region Life Cycle



		public override void DataBind()

		{

			base.DataBind( true );

		}



		/// <summary>

		/// Overrides <see cref="WebControl.RenderBeginTag"/>.

		/// </summary>

		public override void RenderBeginTag( HtmlTextWriter writer )

		{

			// No Opening Tag

		}



		/// <summary>

		/// Overrides <see cref="WebControl.RenderContents"/>.

		/// </summary>

		protected override void RenderContents( HtmlTextWriter writer )

		{



			Table outerTable = new Table();

			outerTable.ControlStyle.CopyFrom( this.ControlStyle );

			if ( outerTable.Font.Size == FontUnit.Empty )

			{

				outerTable.Font.Size = FontUnit.Parse( "1em", System.Globalization.CultureInfo.InvariantCulture );

			}

			outerTable.Width = Unit.Percentage( 100 );





			Double totalVotes = 0;

			Double barDisplayMax = 0;



			// First I need to get totals and percentages information

			foreach ( ListItem item in Items )

			{

				Int32 itemVoteCount = Int32.Parse( item.Value, System.Globalization.CultureInfo.InvariantCulture );

				totalVotes += itemVoteCount;

				switch ( this.BarDisplay )

				{

					case ResultDisplayType.Percentage:

						barDisplayMax = totalVotes;

						break;

					case ResultDisplayType.Count:

						if ( itemVoteCount > barDisplayMax )

						{

							barDisplayMax = itemVoteCount;

						}

						break;

				}

			}



			// Then I cycle thru the items and display the bar and vote count

			foreach ( ListItem item in Items )

			{



				TableRow rRow = new TableRow();

				outerTable.Rows.Add( rRow );



				TableCell barHolder = new TableCell();

				barHolder.Width = Unit.Percentage( 100 );

				rRow.Cells.Add( barHolder );



				Label answerName = new Label();

				answerName.Text = item.Text + "<br>";

				barHolder.Controls.Add( answerName );



				HorizontalBar bar = new HorizontalBar();

				bar.EnableViewState = false;

				bar.Percentage = ( barDisplayMax != 0 ) ? ( Double.Parse( item.Value, System.Globalization.CultureInfo.InvariantCulture ) / barDisplayMax ) * 100 : 0;

				;

				bar.ControlStyle.CopyFrom( this.BarStyle );

				if ( bar.Height == Unit.Empty )

				{

					bar.Height = Unit.Pixel( 10 );

				}

				if ( bar.BorderWidth == Unit.Empty )

				{

					bar.BorderWidth = Unit.Pixel( 1 );

				}

				if ( bar.ForeColor.Equals( bar.BackColor ) )

				{

					PollView parent = this.NamingContainer as PollView;

					if ( parent != null && !parent.ForeColor.Equals( bar.BackColor ) )

					{

						bar.ForeColor = parent.ForeColor;

					}

					else

					{

						if ( bar.BackColor.Equals( System.Drawing.Color.Black ) )

						{

							bar.ForeColor = System.Drawing.Color.White;

						}

						else

						{

							bar.ForeColor = System.Drawing.Color.Black;

						}

					}



				}

				barHolder.Controls.Add( bar );



				TableCell numericDisplay = new TableCell();

				switch ( this.VoteCountDisplay )

				{

					case ResultDisplayType.Percentage:

						Double votePercentage = ( totalVotes != 0 ) ? ( Double.Parse( item.Value, System.Globalization.CultureInfo.InvariantCulture ) / totalVotes ) * 100 : 0;

						numericDisplay.Text = votePercentage.ToString( "##0.0", System.Globalization.CultureInfo.InvariantCulture ) + "%";

						break;

					case ResultDisplayType.Count:

						numericDisplay.Text = item.Value;

						break;

				}

				numericDisplay.VerticalAlign = VerticalAlign.Bottom;

				rRow.Cells.Add( numericDisplay );

			}



			outerTable.RenderControl( writer );

		}



		/// <summary>

		/// Overrides <see cref="WebControl.RenderEndTag"/>.

		/// </summary>

		public override void RenderEndTag( HtmlTextWriter writer )

		{

			// No End Tag

		}

		#endregion

	}

}