#region ================== Copyright (c) 2010 Pascal vd Heiden

/*
 * Copyright (c) 2010 Pascal vd Heiden
 * This program is released under GNU General Public License
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 */

#endregion

#region ================== Namespaces

using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Globalization;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Reflection;
using CodeImp.DoomBuilder.Controls;
using CodeImp.DoomBuilder.Windows;
using CodeImp.DoomBuilder.IO;
using CodeImp.DoomBuilder.Map;
using CodeImp.DoomBuilder.Rendering;
using CodeImp.DoomBuilder.Geometry;
using System.Drawing;
using CodeImp.DoomBuilder.Editing;
using CodeImp.DoomBuilder.Plugins;
using CodeImp.DoomBuilder.Actions;
using CodeImp.DoomBuilder.Types;
using CodeImp.DoomBuilder.Config;
using CodeImp.DoomBuilder.Data;

#endregion

namespace CodeImp.DoomBuilder.GZDoomEditing
{
	public class BuilderPlug : Plug
	{
		#region ================== Variables

		// Static instance
		private static BuilderPlug me;

		// Settings
		private int showvisualthings;			// 0 = none, 1 = sprite only, 2 = sprite caged
		private int changeheightbysidedef;		// 0 = nothing, 1 = change ceiling, 2 = change floor
		private bool visualmodeclearselection;
		private bool usegravity;
		private bool usehighlight;
		
		// Copy/paste
		private string copiedtexture;
		private string copiedflat;
		private Point copiedoffsets;
		private VertexProperties copiedvertexprops;
		private SectorProperties copiedsectorprops;
		private SidedefProperties copiedsidedefprops;
		private LinedefProperties copiedlinedefprops;
		private ThingProperties copiedthingprops;
		
		#endregion

		#region ================== Properties

		// Static property to access the BuilderPlug
		public static BuilderPlug Me { get { return me; } }
		
		// This is the lowest Doom Builder core revision that is required for this plugin to work
		public override int MinimumRevision { get { return 1394; } }
		
		// Settings
		public int ShowVisualThings { get { return showvisualthings; } set { showvisualthings = value; } }
		public int ChangeHeightBySidedef { get { return changeheightbysidedef; } }
		public bool VisualModeClearSelection { get { return visualmodeclearselection; } }
		public bool UseGravity { get { return usegravity; } set { usegravity = value; } }
		public bool UseHighlight { get { return usehighlight; } set { usehighlight = value; } }
		
		// Copy/paste
		public string CopiedTexture { get { return copiedtexture; } set { copiedtexture = value; } }
		public string CopiedFlat { get { return copiedflat; } set { copiedflat = value; } }
		public Point CopiedOffsets { get { return copiedoffsets; } set { copiedoffsets = value; } }
		public VertexProperties CopiedVertexProps { get { return copiedvertexprops; } set { copiedvertexprops = value; } }
		public SectorProperties CopiedSectorProps { get { return copiedsectorprops; } set { copiedsectorprops = value; } }
		public SidedefProperties CopiedSidedefProps { get { return copiedsidedefprops; } set { copiedsidedefprops = value; } }
		public LinedefProperties CopiedLinedefProps { get { return copiedlinedefprops; } set { copiedlinedefprops = value; } }
		public ThingProperties CopiedThingProps { get { return copiedthingprops; } set { copiedthingprops = value; } }
		
		#endregion

		#region ================== Initialize / Dispose
		
		// This event is called when the plugin is initialized
		public override void OnInitialize()
		{
			base.OnInitialize();

			// Keep a static reference
            me = this;

			// Settings
			showvisualthings = 2;
			usegravity = false;
			usehighlight = true;
			LoadSettings();
		}
		
		// This is called when the plugin is terminated
		public override void Dispose()
		{
			base.Dispose();
		}

		#endregion

		#region ================== Methods

		// This loads the plugin settings
		private void LoadSettings()
		{
			changeheightbysidedef = General.Settings.ReadPluginSetting("changeheightbysidedef", 0);
			visualmodeclearselection = General.Settings.ReadPluginSetting("visualmodeclearselection", false);
		}

		#endregion

		#region ================== Events

		// When the Preferences dialog is closed
		public override void OnClosePreferences(PreferencesController controller)
		{
			base.OnClosePreferences(controller);

			// Apply settings that could have been changed
			LoadSettings();
		}
		
		#endregion
		
		#region ================== Classic Mode Surfaces

		// This is called when the vertices are created for the classic mode surfaces
		public override void OnSectorFloorSurfaceUpdate(Sector s, ref FlatVertex[] vertices)
		{
			ImageData img = General.Map.Data.GetFlatImage(s.LongFloorTexture);
			if((img != null) && img.IsImageLoaded)
			{
				// Fetch ZDoom fields
				Vector2D offset = new Vector2D(s.Fields.GetValue("xpanningfloor", 0.0f),
				                               s.Fields.GetValue("ypanningfloor", 0.0f));
				Vector2D scale = new Vector2D(s.Fields.GetValue("xscalefloor", 1.0f),
				                              s.Fields.GetValue("yscalefloor", 1.0f));
				float rotate = s.Fields.GetValue("rotationfloor", 0.0f);
				int color = s.Fields.GetValue("lightcolor", -1);
				int light = s.Fields.GetValue("lightfloor", 0);
				bool absolute = s.Fields.GetValue("lightfloorabsolute", false);
				
				// Setup the vertices with the given settings
				SetupSurfaceVertices(vertices, s, img, offset, scale, rotate, color, light, absolute);
			}
		}

		// This is called when the vertices are created for the classic mode surfaces
		public override void OnSectorCeilingSurfaceUpdate(Sector s, ref FlatVertex[] vertices)
		{
			ImageData img = General.Map.Data.GetFlatImage(s.LongFloorTexture);
			if((img != null) && img.IsImageLoaded)
			{
				// Fetch ZDoom fields
				Vector2D offset = new Vector2D(s.Fields.GetValue("xpanningceiling", 0.0f),
											   s.Fields.GetValue("ypanningceiling", 0.0f));
				Vector2D scale = new Vector2D(s.Fields.GetValue("xscaleceiling", 1.0f),
											  s.Fields.GetValue("yscaleceiling", 1.0f));
				float rotate = s.Fields.GetValue("rotationceiling", 0.0f);
				int color = s.Fields.GetValue("lightcolor", -1);
				int light = s.Fields.GetValue("lightceiling", 0);
				bool absolute = s.Fields.GetValue("lightceilingabsolute", false);
				
				// Setup the vertices with the given settings
				SetupSurfaceVertices(vertices, s, img, offset, scale, rotate, color, light, absolute);
			}
		}

		// This applies the given values on the vertices
		private void SetupSurfaceVertices(FlatVertex[] vertices, Sector s, ImageData img, Vector2D offset,
										  Vector2D scale, float rotate, int color, int light, bool absolute)
		{
			// Prepare for math!
			rotate = Angle2D.DegToRad(rotate);
			Vector2D texscale = new Vector2D(1.0f / img.ScaledWidth, 1.0f / img.ScaledHeight);
			if(!absolute) light = s.Brightness + light;
			PixelColor lightcolor = PixelColor.FromInt(color);
			PixelColor brightness = PixelColor.FromInt(General.Map.Renderer2D.CalculateBrightness(light));
			PixelColor finalcolor = PixelColor.Modulate(lightcolor, brightness);
			color = finalcolor.WithAlpha(255).ToInt();
			
			// Do the math for all vertices
			for(int i = 0; i < vertices.Length; i++)
			{
				Vector2D pos = new Vector2D(vertices[i].x, vertices[i].y);
				pos = pos.GetRotated(rotate);
				pos.y = -pos.y;
				pos = (pos + offset) * scale * texscale;
				vertices[i].u = pos.x;
				vertices[i].v = pos.y;
				vertices[i].c = color;
			}
		}

		#endregion
	}
}