<UserControl x:Class="Tango.MachineStudio.UI.Views.ResolvedIssuesView"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:mahapps="http://metro.mahapps.com/winfx/xaml/controls"
             xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:autoComplete="clr-namespace:Tango.AutoComplete.Editors;assembly=Tango.AutoComplete"
             xmlns:integration="clr-namespace:Tango.Integration.Services;assembly=Tango.Integration"
             xmlns:converters="clr-namespace:Tango.SharedUI.Converters;assembly=Tango.SharedUI"
             xmlns:vm="clr-namespace:Tango.MachineStudio.UI.ViewModels"
             xmlns:tfs="clr-namespace:Tango.TFS;assembly=Tango.TFS"
             xmlns:tfss="clr-namespace:Tango.MachineStudio.UI.TFS"
             xmlns:local="clr-namespace:Tango.MachineStudio.UI.Views"
             mc:Ignorable="d" Width="530" Height="580" Background="White" d:DataContext="{d:DesignInstance Type=vm:ResolvedIssuesViewVM, IsDesignTimeCreatable=False}">
    <Grid>
        <Grid IsEnabled="{Binding IsAvailable}">
            <Grid.RowDefinitions>
                <RowDefinition Height="130"/>
                <RowDefinition Height="1*"/>
                <RowDefinition Height="200"/>
            </Grid.RowDefinitions>

            <Grid>
                <StackPanel Margin="10">
                    <StackPanel Orientation="Horizontal">
                        <Image Source="/Images/bug-resolved.png" Width="48" RenderOptions.BitmapScalingMode="Fant"></Image>
                        <TextBlock VerticalAlignment="Center" Margin="10 0 0 0" FontSize="20">Resolved Issues</TextBlock>
                    </StackPanel>

                    <TextBlock HorizontalAlignment="Left" Margin="10" TextWrapping="Wrap">
                        Below you can find issues reported by you that have been flagged as resolved by the development team.
                        Please verify each one and report back by pressing 'FIXED' or 'NOT FIXED'.
                    </TextBlock>
                </StackPanel>
            </Grid>

            <Grid Grid.Row="1">
                <ListBox x:Name="list" ItemsSource="{Binding TFSClient.ResolvedWorkItems}" HorizontalContentAlignment="Stretch">
                    <ListBox.ItemTemplate>
                        <DataTemplate>
                            <Border BorderBrush="#E6E6E6" BorderThickness="0 0 0 1" Padding="5">
                                <DockPanel>
                                    <StackPanel Orientation="Horizontal">
                                        <Image Source="/Images/bug.png" Width="24" RenderOptions.BitmapScalingMode="Fant"></Image>
                                        <StackPanel Margin="5 0 0 0">
                                            <TextBlock Text="{Binding Title}" FontWeight="SemiBold" TextTrimming="CharacterEllipsis"></TextBlock>
                                            <TextBlock Text="{Binding Comment,TargetNullValue='Comment',FallbackValue='Comment'}" Foreground="Gray" FontSize="10"></TextBlock>
                                        </StackPanel>
                                    </StackPanel>

                                    <StackPanel HorizontalAlignment="Right" Orientation="Horizontal">
                                        <Button Background="#FF8282" BorderBrush="#FF8282" Padding="0" Width="90" Command="{Binding RelativeSource={RelativeSource AncestorType=UserControl},Path=DataContext.DeclineCommand}" CommandParameter="{Binding}">
                                            <StackPanel Orientation="Horizontal">
                                                <materialDesign:PackIcon VerticalAlignment="Center" Kind="Close" />
                                                <TextBlock Margin="10 0 0 0" FontSize="11"
// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media.TextFormatting;
using Tango.Scripting.Editors.Document;
using Tango.Scripting.Editors.Rendering;
using Tango.Scripting.Editors.Utils;

namespace Tango.Scripting.Editors.Editing
{
	/// <summary>
	/// Rectangular selection ("box selection").
	/// </summary>
	public sealed class RectangleSelection : Selection
	{
		#region Commands
		/// <summary>
		/// Expands the selection left by one character, creating a rectangular selection.
		/// Key gesture: Alt+Shift+Left
		/// </summary>
		public static readonly RoutedUICommand BoxSelectLeftByCharacter = Command("BoxSelectLeftByCharacter");
		
		/// <summary>
		/// Expands the selection right by one character, creating a rectangular selection.
		/// Key gesture: Alt+Shift+Right
		/// </summary>
		public static readonly RoutedUICommand BoxSelectRightByCharacter = Command("BoxSelectRightByCharacter");
		
		/// <summary>
		/// Expands the selection left by one word, creating a rectangular selection.
		/// Key gesture: Ctrl+Alt+Shift+Left
		/// </summary>
		public static readonly RoutedUICommand BoxSelectLeftByWord = Command("BoxSelectLeftByWord");
		
		/// <summary>
		/// Expands the selection left by one word, creating a rectangular selection.
		/// Key gesture: Ctrl+Alt+Shift+Right
		/// </summary>
		public static readonly RoutedUICommand BoxSelectRightByWord = Command("BoxSelectRightByWord");
		
		/// <summary>
		/// Expands the selection up by one line, creating a rectangular selection.
		/// Key gesture: Alt+Shift+Up
		/// </summary>
		public static readonly RoutedUICommand BoxSelectUpByLine = Command("BoxSelectUpByLine");
		
		/// <summary>
		/// Expands the selection up by one line, creating a rectangular selection.
		/// Key gesture: Alt+Shift+Down
		/// </summary>
		public static readonly RoutedUICommand BoxSelectDownByLine = Command("BoxSelectDownByLine");
		
		/// <summary>
		/// Expands the selection to the start of the line, creating a rectangular selection.
		/// Key gesture: Alt+Shift+Home
		/// </summary>
		public static readonly RoutedUICommand BoxSelectToLineStart = Command("BoxSelectToLineStart");
		
		/// <summary>
		/// Expands the selection to the end of the line, creating a rectangular selection.
		/// Key gesture: Alt+Shift+End
		/// </summary>
		public static readonly RoutedUICommand BoxSelectToLineEnd = Command("BoxSelectToLineEnd");
		
		static RoutedUICommand Command(string name)
		{
			return new RoutedUICommand(name, name, typeof(RectangleSelection));
		}
		#endregion
		
		TextDocument document;
		readonly int startLine, endLine;
		readonly double startXPos, endXPos;
		readonly int topLeftOffset, bottomRightOffset;
		readonly TextViewPosition start, end;
		
		readonly List<SelectionSegment> segments = new List<SelectionSegment>();
		
		#region Constructors
		/// <summary>
		/// Creates a new rectangular selection.
		/// </summary>
		public RectangleSelection(TextArea textArea, TextViewPosition start, TextViewPosition end)
			: base(textArea)
		{
			InitDocument();
			this.startLine = start.Line;
			this.endLine = end.Line;
			this.startXPos = GetXPos(textArea, start);
			this.endXPos = GetXPos(textArea, end);
			CalculateSegments();
			this.topLeftOffset = this.segments.First().StartOffset;
			this.bottomRightOffset = this.segments.Last().EndOffset;
			
			this.start = start;
			this.end = end;
		}
		
		private RectangleSelection(TextArea textArea, int startLine, double startXPos, TextViewPosition end)
			: base(textArea)
		{
			InitDocument();
			this.startLine = startLine;
			this.endLine = end.Line;
			this.startXPos = startXPos;
			this.endXPos = GetXPos(textArea, end);
			CalculateSegments();
			this.topLeftOffset = this.segments.First().StartOffset;
			this.bottomRightOffset = this.segments.Last().EndOffset;
			
			this.start = GetStart();
			this.end = end;
		}
		
		private RectangleSelection(TextArea textArea, TextViewPosition start, int endLine, double endXPos)
			: base(textArea)
		{
			InitDocument();
			this.startLine = start.Line;
			this.endLine = endLine;
			this.startXPos = GetXPos(textArea, start);
			this.endXPos = endXPos;
			CalculateSegments();
			this.topLeftOffset = this.segments.First().StartOffset;
			this.bottomRightOffset = this.segments.Last().EndOffset;
			
			this.start = start;
			this.end = GetEnd();
		}
		
		void InitDocument()
		{
			document = textArea.Document;
			if (document == null)
				throw ThrowUtil.NoDocumentAssigned();
		}
		
		static double GetXPos(TextArea textArea, TextViewPosition pos)
		{
			DocumentLine documentLine = textArea.Document.GetLineByNumber(pos.Line);
			VisualLine visualLine = textArea.TextView.GetOrConstructVisualLine(documentLine);
			int vc = visualLine.ValidateVisualColumn(pos, true);
			TextLine textLine = visualLine.GetTextLine(vc);
			return visualLine.GetTextLineVisualXPosition(textLine, vc);
		}
		
		void CalculateSegments()
		{
			DocumentLine nextLine = document.GetLineByNumber(Math.Min(startLine, endLine));
			do {
				VisualLine vl = textArea.TextView.GetOrConstructVisualLine(nextLine);
				int startVC = vl.GetVisualColumn(new Point(startXPos, 0), true);
				int endVC = vl.GetVisualColumn(new Point(endXPos, 0), true);
				
				int baseOffset = vl.FirstDocumentLine.Offset;
				int startOffset = baseOffset + vl.GetRelativeOffset(startVC);
				int endOffset = baseOffset + vl.GetRelativeOffset(endVC);
				segments.Add(new SelectionSegment(startOffset, startVC, endOffset, endVC));
				
				nextLine = vl.LastDocumentLine.NextLine;
			} while (nextLine != null && nextLine.LineNumber <= Math.Max(startLine, endLine));
		}
		
		TextViewPosition GetStart()
		{
			SelectionSegment segment = (startLine < endLine ? segments.First() : segments.Last());
			if (startXPos < endXPos) {
				return new TextViewPosition(document.GetLocation(segment.StartOffset), segment.StartVisualColumn);
			} else {
				return new TextViewPosition(document.GetLocation(segment.EndOffset), segment.EndVisualColumn);
			}
		}
		
		TextViewPosition GetEnd()
		{
			SelectionSegment segment = (startLine < endLine ? segments.Last() : segments.First());
			if (startXPos < endXPos) {
				return new TextViewPosition(document.GetLocation(segment.EndOffset), segment.EndVisualColumn);
			} else {
				return new TextViewPosition(document.GetLocation(segment.StartOffset), segment.StartVisualColumn);
			}
		}
		#endregion
		
		/// <inheritdoc/>
		public override string GetText()
		{
			StringBuilder b = new StringBuilder();
			foreach (ISegment s in this.Segments) {
				if (b.Length > 0)
					b.AppendLine();
				b.Append(document.GetText(s));
			}
			return b.ToString();
		}
		
		/// <inheritdoc/>
		public override Selection StartSelectionOrSetEndpoint(TextViewPosition startPosition, TextViewPosition endPosition)
		{
			return SetEndpoint(endPosition);
		}
		
		/// <inheritdoc/>
		public override int Length {
			get {
				return this.Segments.Sum(s => s.Length);
			}
		}
		
		/// <inheritdoc/>
		public override bool EnableVirtualSpace {
			get { return true; }
		}
		
		/// <inheritdoc/>
		public override ISegment SurroundingSegment {
			get {
				return new SimpleSegment(topLeftOffset, bottomRightOffset - topLeftOffset);
			}
		}
		
		/// <inheritdoc/>
		public override IEnumerable<SelectionSegment> Segments {
			get { return segments; }
		}
		
		/// <inheritdoc/>
		public override TextViewPosition StartPosition {
			get { return start; }
		}
		
		/// <inheritdoc/>
		public override TextViewPosition EndPosition {
			get { return end; }
		}
		
		/// <inheritdoc/>
		public override bool Equals(object obj)
		{
			RectangleSelection r = obj as RectangleSelection;
			return r != null && r.textArea == this.textArea
				&& r.topLeftOffset == this.topLeftOffset && r.bottomRightOffset == this.bottomRightOffset
				&& r.startLine == this.startLine && r.endLine == this.endLine
				&& r.startXPos == this.startXPos && r.endXPos == this.endXPos;
		}
		
		/// <inheritdoc/>
		public override int GetHashCode()
		{
			return topLeftOffset ^ bottomRightOffset;
		}
		
		/// <inheritdoc/>
		public override Selection SetEndpoint(TextViewPosition endPosition)
		{
			return new RectangleSelection(textArea, startLine, startXPos, endPosition);
		}
		
		int GetVisualColumnFromXPos(int line, double xPos)
		{
			var vl = textArea.TextView.GetOrConstructVisualLine(textArea.Document.GetLineByNumber(line));
			return vl.GetVisualColumn(new Point(xPos, 0), true);
		}
		
		/// <inheritdoc/>
		public override Selection UpdateOnDocumentChange(DocumentChangeEventArgs e)
		{
			TextLocation newStartLocation = textArea.Document.GetLocation(e.GetNewOffset(topLeftOffset, AnchorMovementType.AfterInsertion));
			TextLocation newEndLocation = textArea.Document.GetLocation(e.GetNewOffset(bottomRightOffset, AnchorMovementType.BeforeInsertion));
			
			return new RectangleSelection(textArea,
			                              new TextViewPosition(newStartLocation, GetVisualColumnFromXPos(newStartLocation.Line, startXPos)),
			                              new TextViewPosition(newEndLocation, GetVisualColumnFromXPos(newEndLocation.Line, endXPos)));
		}
		
		/// <inheritdoc/>
		public override void ReplaceSelectionWithText(string newText)
		{
			if (newText == null)
				throw new ArgumentNullException("newText");
			using (textArea.Document.RunUpdate()) {
				TextViewPosition start = new TextViewPosition(document.GetLocation(topLeftOffset), GetVisualColumnFromXPos(startLine, startXPos));
				TextViewPosition end = new TextViewPosition(document.GetLocation(bottomRightOffset), GetVisualColumnFromXPos(endLine, endXPos));
				int insertionLength;
				int totalInsertionLength = 0;
				int firstInsertionLength = 0;
				int editOffset = Math.Min(topLeftOffset, bottomRightOffset);
				TextViewPosition pos;
				if (NewLineFinder.NextNewLine(newText, 0) == SimpleSegment.Invalid) {
					// insert same text into every line
					foreach (SelectionSegment lineSegment in this.Segments.Reverse()) {
						ReplaceSingleLineText(textArea, lineSegment, newText, out insertionLength);
						totalInsertionLength += insertionLength;
						firstInsertionLength = insertionLength;
					}
					
					int newEndOffset = editOffset + totalInsertionLength;
					pos = new TextViewPosition(document.GetLocation(editOffset + firstInsertionLength));
					
					textArea.Selection = new RectangleSelection(textArea, pos, Math.Max(startLine, endLine), GetXPos(textArea, pos));
				} else {
					string[] lines = newText.Split(NewLineFinder.NewlineStrings, segments.Count, StringSplitOptions.None);
					int line = Math.Min(startLine, endLine);
					for (int i = lines.Length - 1; i >= 0; i--) {
						ReplaceSingleLineText(textArea, segments[i], lines[i], out insertionLength);
						firstInsertionLength = insertionLength;
					}
					pos = new TextViewPosition(document.GetLocation(editOffset + firstInsertionLength));
					textArea.ClearSelection();
				}
				textArea.Caret.Position = textArea.TextView.GetPosition(new Point(GetXPos(textArea, pos), textArea.TextView.GetVisualTopByDocumentLine(Math.Max(startLine, endLine)))).GetValueOrDefault();
			}
		}
		
		void ReplaceSingleLineText(TextArea textArea, SelectionSegment lineSegment, string newText, out int insertionLength)
		{
			if (lineSegment.Length == 0) {
				if (newText.Length > 0 && textArea.ReadOnlySectionProvider.CanInsert(lineSegment.StartOffset)) {
					newText = AddSpacesIfRequired(newText, new TextViewPosition(document.GetLocation(lineSegment.StartOffset), lineSegment.StartVisualColumn), new TextViewPosition(document.GetLocation(lineSegment.EndOffset), lineSegment.EndVisualColumn));
					textArea.Document.Insert(lineSegment.StartOffset, newText);
				}
			} else {
				ISegment[] segmentsToDelete = textArea.GetDeletableSegments(lineSegment);
				for (int i = segmentsToDelete.Length - 1; i >= 0; i--) {
					if (i == segmentsToDelete.Length - 1) {
						if (segmentsToDelete[i].Offset == SurroundingSegment.Offset && segmentsToDelete[i].Length == SurroundingSegment.Length) {
							newText = AddSpacesIfRequired(newText, new TextViewPosition(document.GetLocation(lineSegment.StartOffset), lineSegment.StartVisualColumn), new TextViewPosition(document.GetLocation(lineSegment.EndOffset), lineSegment.EndVisualColumn));
						}
						textArea.Document.Replace(segmentsToDelete[i], newText);
					} else {
						textArea.Document.Remove(segmentsToDelete[i]);
					}
				}
			}
			insertionLength = newText.Length;
		}
		
		/// <summary>
		/// Performs a rectangular paste operation.
		/// </summary>
		public static bool PerformRectangularPaste(TextArea textArea, TextViewPosition startPosition, string text, bool selectInsertedText)
		{
			if (textArea == null)
				throw new ArgumentNullException("textArea");
			if (text == null)
				throw new ArgumentNullException("text");
			int newLineCount = text.Count(c => c == '\n'); // TODO might not work in all cases, but single \r line endings are really rare today.
			TextLocation endLocation = new TextLocation(startPosition.Line + newLineCount, startPosition.Column);
			if (endLocation.Line <= textArea.Document.LineCount) {
				int endOffset = textArea.Document.GetOffset(endLocation);
				if (textArea.Selection.EnableVirtualSpace || textArea.Document.GetLocation(endOffset) == endLocation) {
					RectangleSelection rsel = new RectangleSelection(textArea, startPosition, endLocation.Line, GetXPos(textArea, startPosition));
					rsel.ReplaceSelectionWithText(text);
					if (selectInsertedText && textArea.Selection is RectangleSelection) {
						RectangleSelection sel = (RectangleSelection)textArea.Selection;
						textArea.Selection = new RectangleSelection(textArea, startPosition, sel.endLine, sel.endXPos);
					}
					return true;
				}
			}
			return false;
		}
		
		/// <summary>
		/// Gets the name of the entry in the DataObject that signals rectangle selections.
		/// </summary>
		public const string RectangularSelectionDataType = "AvalonEditRectangularSelection";
		
		/// <inheritdoc/>
		public override System.Windows.DataObject CreateDataObject(TextArea textArea)
		{
			var data = base.CreateDataObject(textArea);
			
			MemoryStream isRectangle = new MemoryStream(1);
			isRectangle.WriteByte(1);
			data.SetData(RectangularSelectionDataType, isRectangle, false);
			return data;
		}
		
		/// <inheritdoc/>
		public override string ToString()
		{
			// It's possible that ToString() gets called on old (invalid) selections, e.g. for "change from... to..." debug message
			// make sure we don't crash even when the desired locations don't exist anymore.
			return string.Format("[RectangleSelection {0} {1} {2} to {3} {4} {5}]", startLine, topLeftOffset, startXPos, endLine, bottomRightOffset, endXPos);
		}
	}
}