/*
Copyright (c) 2014, Lars Brubaker
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

The views and conclusions contained in the software and documentation are those
of the authors and should not be interpreted as representing official policies,
either expressed or implied, of the FreeBSD Project.
*/

using System;
using System.Collections.Generic;
using System.Diagnostics;
using MatterHackers.Agg;
using MatterHackers.Agg.Transform;
using MatterHackers.Agg.UI;
using MatterHackers.Agg.VertexSource;
using MatterHackers.DataConverters3D;
using MatterHackers.MatterControl.Extensibility;
using MatterHackers.RayTracer;
using MatterHackers.VectorMath;

namespace MatterHackers.MeshVisualizer
{
	[Flags]
	public enum LineArrows { None = 0, Start = 1, End = 2, Both = 3 };

	public class InteractionVolume
	{
		public bool MouseDownOnControl;
		public Matrix4X4 TotalTransform = Matrix4X4.Identity;

		public string Name { get; set; }

		private bool mouseOver = false;

		public InteractionVolume(IInteractionVolumeContext meshViewerToDrawWith)
		{
			this.InteractionContext = meshViewerToDrawWith;
		}

		public IPrimitive CollisionVolume { get; set; }
		public bool DrawOnTop { get; protected set; }
		public IntersectInfo MouseMoveInfo { get; set; }

		public bool MouseOver
		{
			get
			{
				return mouseOver;
			}

			set
			{
				if (mouseOver != value)
				{
					mouseOver = value;
					Invalidate();
				}
			}
		}

		protected IInteractionVolumeContext InteractionContext { get; }
		protected double SecondsToShowNumberEdit { get; private set; } = 4;
		protected Stopwatch timeSinceMouseUp { get; private set; } = new Stopwatch();

		public IObject3D RootSelection
		{
			get
			{
				var selectedItemRoot = InteractionContext.Scene.SelectedItemRoot;
				var selectedItem = InteractionContext.Scene.SelectedItem;
				return (selectedItemRoot == selectedItem) ? selectedItem : null;
			}
		}

		public static void DrawMeasureLine(Graphics2D graphics2D, Vector2 lineStart, Vector2 lineEnd, Color color, LineArrows arrows)
		{
			graphics2D.Line(lineStart, lineEnd, Color.Black);

			Vector2 direction = lineEnd - lineStart;
			if (direction.LengthSquared > 0
				&& (arrows.HasFlag(LineArrows.Start) || arrows.HasFlag(LineArrows.End)))
			{
				VertexStorage arrow = new VertexStorage();
				arrow.MoveTo(-3, -5);
				arrow.LineTo(0, 0);
				arrow.LineTo(3, -5);
				if (arrows.HasFlag(LineArrows.End))
				{
					double rotation = Math.Atan2(direction.Y, direction.X);
					IVertexSource correctRotation = new VertexSourceApplyTransform(arrow, Affine.NewRotation(rotation - MathHelper.Tau / 4));
					IVertexSource inPosition = new VertexSourceApplyTransform(correctRotation, Affine.NewTranslation(lineEnd));
					graphics2D.Render(inPosition, Color.Black);
				}
				if (arrows.HasFlag(LineArrows.Start))
				{
					double rotation = Math.Atan2(direction.Y, direction.X) + MathHelper.Tau / 2;
					IVertexSource correctRotation = new VertexSourceApplyTransform(arrow, Affine.NewRotation(rotation - MathHelper.Tau / 4));
					IVertexSource inPosition = new VertexSourceApplyTransform(correctRotation, Affine.NewTranslation(lineStart));
					graphics2D.Render(inPosition, Color.Black);
				}
			}
		}

		public static Vector3 SetBottomControlHeight(AxisAlignedBoundingBox originalSelectedBounds, Vector3 cornerPosition)
		{
			if (originalSelectedBounds.MinXYZ.Z < 0)
			{
				if (originalSelectedBounds.MaxXYZ.Z < 0)
				{
					cornerPosition.Z = originalSelectedBounds.MaxXYZ.Z;
				}
				else
				{
					cornerPosition.Z = 0;
				}
			}

			return cornerPosition;
		}

		public virtual void DrawGlContent(DrawGlContentEventArgs e)
		{
		}

		public void Invalidate()
		{
			InteractionContext.GuiSurface.Invalidate();
		}

		public virtual void CancelOpperation()
		{

		}

		public virtual void OnMouseDown(MouseEvent3DArgs mouseEvent3D)
		{
			if (mouseEvent3D.MouseEvent2D.Button == MouseButtons.Left)
			{
				MouseDownOnControl = true;
				InteractionContext.GuiSurface.Invalidate();
			}
		}

		public virtual void OnMouseMove(MouseEvent3DArgs mouseEvent3D)
		{
		}

		public virtual void OnMouseUp(MouseEvent3DArgs mouseEvent3D)
		{
			MouseDownOnControl = false;
		}

		public virtual void SetPosition(IObject3D selectedItem)
		{
		}
	}

	public interface IInteractionVolumeContext
	{
		InteractionVolume HoveredInteractionVolume { get; }
		InteractionVolume SelectedInteractionVolume { get; }
		InteractiveScene Scene { get; }
		WorldView World { get; }

		GuiWidget GuiSurface { get; }

		double SnapGridDistance { get; }
	}

	public interface IInteractionVolumeProvider
	{
		IEnumerable<InteractionVolume> Create(IInteractionVolumeContext context);
	}
}