#region ================== Copyright (c) 2007 Pascal vd Heiden

/*
 * Copyright (c) 2007 Pascal vd Heiden, www.codeimp.com
 * 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.Generic;
using System.Windows.Forms;
using CodeImp.DoomBuilder.Map;
using CodeImp.DoomBuilder.Types;

#endregion

namespace CodeImp.DoomBuilder.Windows
{
	internal partial class SectorEditForm : DelayedForm
	{
		#region ================== Events

		public event EventHandler OnValuesChanged; //mxd

		#endregion

		#region ================== Variables

		private ICollection<Sector> sectors;
		private List<SectorProperties> sectorProps; //mxd
		private bool blockUpdate; //mxd

		private struct SectorProperties //mxd
		{
			public int Brightness;
			public int FloorHeight;
			public int CeilHeight;
			public string FloorTexture;
			public string CeilTexture;

			public SectorProperties(Sector s) {
				Brightness = s.Brightness;
				FloorHeight = s.FloorHeight;
				CeilHeight = s.CeilHeight;
				FloorTexture = s.FloorTexture;
				CeilTexture = s.CeilTexture;
			}
		}

		#endregion

		#region ================== Constructor

		// Constructor
		public SectorEditForm()
		{
			// Initialize
			InitializeComponent();

			// Fill effects list
			effect.AddInfo(General.Map.Config.SortedSectorEffects.ToArray());

			// Initialize image selectors
			floortex.Initialize();
			ceilingtex.Initialize();

			// Set steps for brightness field
			brightness.StepValues = General.Map.Config.BrightnessLevels;
		}

		#endregion

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

		// This sets up the form to edit the given sectors
		public void Setup(ICollection<Sector> sectors)
		{
			blockUpdate = true; //mxd
			
			Sector sc;
			
			// Keep this list
			this.sectors = sectors;
			if(sectors.Count > 1) this.Text = "Edit Sectors (" + sectors.Count + ")";
			sectorProps = new List<SectorProperties>(); //mxd

			//mxd. Make undo
			string undodesc = "sector";
			if(sectors.Count > 1) undodesc = sectors.Count + " sectors";
			General.Map.UndoRedo.CreateUndo("Edit " + undodesc);

			////////////////////////////////////////////////////////////////////////
			// Set all options to the first sector properties
			////////////////////////////////////////////////////////////////////////

			// Get first sector
			sc = General.GetByIndex(sectors, 0);

			// Effects
			effect.Value = sc.Effect;
			brightness.Text = sc.Brightness.ToString();

			// Floor/ceiling
			floorheight.Text = sc.FloorHeight.ToString();
			ceilingheight.Text = sc.CeilHeight.ToString();
			floortex.TextureName = sc.FloorTexture;
			ceilingtex.TextureName = sc.CeilTexture;

			// Action
			tagSelector.Setup(UniversalType.SectorTag); //mxd
			tagSelector.SetTag(sc.Tag);//mxd
			
			////////////////////////////////////////////////////////////////////////
			// Now go for all sectors and change the options when a setting is different
			////////////////////////////////////////////////////////////////////////

			// Go for all sectors
			foreach(Sector s in sectors)
			{
				// Effects
				if(s.Effect != effect.Value) effect.Empty = true;
				if(s.Brightness.ToString() != brightness.Text) brightness.Text = "";

				// Floor/Ceiling
				if(s.FloorHeight.ToString() != floorheight.Text) floorheight.Text = "";
				if(s.CeilHeight.ToString() != ceilingheight.Text) ceilingheight.Text = "";
				if(s.FloorTexture != floortex.TextureName) floortex.TextureName = "";
				if(s.CeilTexture != ceilingtex.TextureName) ceilingtex.TextureName = "";

				// Action
				if(s.Tag != sc.Tag)	tagSelector.ClearTag(); //mxd

				//mxd. Store initial properties
				sectorProps.Add(new SectorProperties(s));
			}

			// Show sector height
			UpdateSectorHeight();

			blockUpdate = false; //mxd
		}

		// This updates the sector height field
		private void UpdateSectorHeight()
		{
			bool showheight = true;
			int delta = 0;
			Sector first = null;
			
			// Check all selected sectors
			foreach(Sector s in sectors)
			{
				if(first == null)
				{
					// First sector in list
					delta = s.CeilHeight - s.FloorHeight;
					showheight = true;
					first = s;
				}
				else
				{
					if(delta != (s.CeilHeight - s.FloorHeight))
					{
						// We can't show heights because the delta
						// heights for the sectors is different
						showheight = false;
						break;
					}
				}
			}

			if(showheight)
			{
				int fh = floorheight.GetResult(first.FloorHeight);
				int ch = ceilingheight.GetResult(first.CeilHeight);
				int height = ch - fh;
				sectorheight.Text = height.ToString();
				sectorheight.Visible = true;
				sectorheightlabel.Visible = true;
			}
			else
			{
				sectorheight.Visible = false;
				sectorheightlabel.Visible = false;
			}
		}

		#endregion

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

		// OK clicked
		private void apply_Click(object sender, EventArgs e)
		{
			//mxd. Apply "Static" properties
			// Verify the tag
			tagSelector.ValidateTag(); //mxd
			if((tagSelector.GetTag(0) < General.Map.FormatInterface.MinTag) || (tagSelector.GetTag(0) > General.Map.FormatInterface.MaxTag)) {
				General.ShowWarningMessage("Sector tag must be between " + General.Map.FormatInterface.MinTag + " and " + General.Map.FormatInterface.MaxTag + ".", MessageBoxButtons.OK);
				return;
			}

			// Verify the effect
			if((effect.Value < General.Map.FormatInterface.MinEffect) || (effect.Value > General.Map.FormatInterface.MaxEffect)) {
				General.ShowWarningMessage("Sector effect must be between " + General.Map.FormatInterface.MinEffect + " and " + General.Map.FormatInterface.MaxEffect + ".", MessageBoxButtons.OK);
				return;
			}

			// Go for all sectors
			foreach(Sector s in sectors) {
				// Effects
				if(!effect.Empty) s.Effect = effect.Value;

				// Action
				s.Tag = tagSelector.GetTag(s.Tag); //mxd
			}

			// Done
			General.Map.IsChanged = true;
			if(OnValuesChanged != null)	OnValuesChanged(this, EventArgs.Empty); //mxd
			this.DialogResult = DialogResult.OK;
			this.Close();
		}

		// Cancel clicked
		private void cancel_Click(object sender, EventArgs e)
		{
			//mxd. perform undo
			General.Map.UndoRedo.WithdrawUndo();
			
			// And be gone
			this.DialogResult = DialogResult.Cancel;
			this.Close();
		}


		// Browse Effect clicked
		private void browseeffect_Click(object sender, EventArgs e)
		{
			effect.Value = EffectBrowserForm.BrowseEffect(this, effect.Value);
		}

		// Help
		private void SectorEditForm_HelpRequested(object sender, HelpEventArgs hlpevent) {
			General.ShowHelp("w_sectoredit.html");
			hlpevent.Handled = true;
		}

		#endregion

		#region ================== mxd. Realtime Events

		// Ceiling height changes
		private void ceilingheight_TextChanged(object sender, EventArgs e)
		{
			UpdateSectorHeight();

			if(blockUpdate) return;
			int i = 0;

			//restore values
			if(string.IsNullOrEmpty(ceilingheight.Text)) {
				foreach(Sector s in sectors)
					s.CeilHeight = sectorProps[i++].CeilHeight;
			//update values
			} else {
				foreach(Sector s in sectors)
					s.CeilHeight = ceilingheight.GetResult(sectorProps[i++].CeilHeight);
			}

			General.Map.IsChanged = true;
			if(OnValuesChanged != null) OnValuesChanged(this, EventArgs.Empty);
		}

		// Floor height changes
		private void floorheight_TextChanged(object sender, EventArgs e)
		{
			UpdateSectorHeight();

			if(blockUpdate) return;
			int i = 0;

			//restore values
			if(string.IsNullOrEmpty(floorheight.Text)) {
				foreach(Sector s in sectors)
					s.FloorHeight = sectorProps[i++].FloorHeight;
			//update values
			} else {
				foreach(Sector s in sectors)
					s.FloorHeight = floorheight.GetResult(sectorProps[i++].FloorHeight);
			}

			General.Map.IsChanged = true;
			if(OnValuesChanged != null) OnValuesChanged(this, EventArgs.Empty);
		}

		private void floortex_OnValueChanged(object sender, EventArgs e) {
			if(blockUpdate) return;

			//restore values
			if(string.IsNullOrEmpty(floortex.TextureName)) {
				int i = 0;

				foreach(Sector s in sectors)
					s.SetFloorTexture(sectorProps[i++].FloorTexture);
			//update values
			} else {
				foreach(Sector s in sectors)
					s.SetFloorTexture(floortex.GetResult(s.FloorTexture));
			}

			// Update the used textures
			General.Map.Data.UpdateUsedTextures();

			General.Map.IsChanged = true;
			if(OnValuesChanged != null) OnValuesChanged(this, EventArgs.Empty);
		}

		private void ceilingtex_OnValueChanged(object sender, EventArgs e) {
			if(blockUpdate) return;

			//restore values
			if(string.IsNullOrEmpty(ceilingtex.TextureName)) {
				int i = 0;

				foreach(Sector s in sectors)
					s.SetCeilTexture(sectorProps[i++].CeilTexture);
			//update values
			} else {
				foreach(Sector s in sectors)
					s.SetCeilTexture(ceilingtex.GetResult(s.CeilTexture));
			}

			// Update the used textures
			General.Map.Data.UpdateUsedTextures();

			General.Map.IsChanged = true;
			if(OnValuesChanged != null) OnValuesChanged(this, EventArgs.Empty);
		}

		private void brightness_WhenTextChanged(object sender, EventArgs e) {
			if(blockUpdate) return;
			int i = 0;

			//restore values
			if(string.IsNullOrEmpty(brightness.Text)) {
				foreach(Sector s in sectors)
					s.Brightness = sectorProps[i++].Brightness;
			//update values
			} else {
				foreach(Sector s in sectors)
					s.Brightness = General.Clamp(brightness.GetResult(sectorProps[i++].Brightness), General.Map.FormatInterface.MinBrightness, General.Map.FormatInterface.MaxBrightness);
			}

			General.Map.IsChanged = true;
			if(OnValuesChanged != null) OnValuesChanged(this, EventArgs.Empty);
		}

		#endregion
	}
}