#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.Drawing;
using System.Windows.Forms;
using CodeImp.DoomBuilder.Controls;
using CodeImp.DoomBuilder.IO;
using CodeImp.DoomBuilder.Data;
using CodeImp.DoomBuilder.Config;
using System.IO;

#endregion

namespace CodeImp.DoomBuilder.Windows
{
	internal partial class TextureBrowserForm : DelayedForm
	{
		// Variables
		private string selectedname;
		private Point lastposition;
		private Size lastsize;
		private readonly ListViewGroup usedgroup;
		private readonly ListViewGroup availgroup;
		private TreeNode selectedset; //mxd
		private long selecttextureonfill; //mxd. Was string, which wasn't reliable whem dealing with long texture names
		private readonly bool usedgroupcollapsed; //mxd
		private readonly bool browseflats; //mxd
		
		// Properties
		public string SelectedName { get { return selectedname; } }
		
		// Constructor
		public TextureBrowserForm(string selecttexture, bool browseflats)
		{
			Cursor.Current = Cursors.WaitCursor;
			General.Interface.DisableProcessing(); //mxd

			TreeNode item; //mxd
			long longname = Lump.MakeLongName(selecttexture ?? "");
			longname = (browseflats ? General.Map.Data.GetFullLongFlatName(longname) : General.Map.Data.GetFullLongTextureName(longname)); //mxd
			int count; //mxd
			selectedset = null; //mxd
			this.browseflats = browseflats; //mxd
			
			// Initialize
			InitializeComponent();

			//mxd. Set title
			string imagetype = (browseflats ? "flats" : "textures");
			this.Text = "Browse " + imagetype;

			// Setup texture browser
			ImageBrowserControl.ShowTexturesFromSubDirectories = General.Settings.ReadSetting("browserwindow.showtexturesfromsubdirs", true);
			ImageBrowserControl.UseLongTextureNames = General.Map.Options.UseLongTextureNames;
			browser.BrowseFlats = browseflats;
			browser.ApplySettings();
			
			// Update the used textures
			General.Map.Data.UpdateUsedTextures();

			tvTextureSets.BeginUpdate(); //mxd

			//mxd. Texture longname to select when list is filled
			selecttextureonfill = longname;

			// Make groups
			usedgroup = browser.AddGroup("Used " + imagetype + ":");
			availgroup = browser.AddGroup("Available " + imagetype + ":");

			//mxd. Make "Used" group collapsible
			usedgroupcollapsed = General.Settings.ReadSetting("browserwindow.usedgroupcollapsed", false);
			browser.SetGroupCollapsed(usedgroup, usedgroupcollapsed);

			//mxd. Fill texture sets list with normal texture sets
			foreach(IFilledTextureSet ts in General.Map.Data.TextureSets) 
			{
				count = (browseflats ? ts.Flats.Count : ts.Textures.Count);
				if((count == 0 && !General.Map.Config.MixTexturesFlats) || (ts.Flats.Count == 0 && ts.Textures.Count == 0)) 
					continue;

				item = tvTextureSets.Nodes.Add(ts.Name + " [" + count + "]");
				item.Name = ts.Name;
				item.Tag = ts;
				item.ImageIndex = 0;
			}

			//mxd. Add container-specific texture sets
			foreach(ResourceTextureSet ts in General.Map.Data.ResourceTextureSets)
			{
				count = (browseflats ? ts.Flats.Count : ts.Textures.Count);
				if((count == 0 && !General.Map.Config.MixTexturesFlats) || (ts.Flats.Count == 0 && ts.Textures.Count == 0))
					continue;

				item = tvTextureSets.Nodes.Add(ts.Name + " [" + count + "]");
				item.Name = ts.Name;
				item.Tag = ts;
				item.ImageIndex = 2 + ts.Location.type;
				item.SelectedImageIndex = item.ImageIndex;

				CreateNodes(item);
				item.Expand();
			}

			//mxd. Add "All" texture set
			count = (browseflats ? General.Map.Data.AllTextureSet.Flats.Count : General.Map.Data.AllTextureSet.Textures.Count);
			item = tvTextureSets.Nodes.Add(General.Map.Data.AllTextureSet.Name + " [" + count + "]");
			item.Name = General.Map.Data.AllTextureSet.Name;
			item.Tag = General.Map.Data.AllTextureSet;
			item.ImageIndex = 1;
			item.SelectedImageIndex = item.ImageIndex;

			//mxd. Should we bother finding the correct texture set?
			if(General.Settings.LocateTextureGroup)
			{
				//mxd. Get the previously selected texture set
				string selectname = General.Settings.ReadSetting("browserwindow.textureset", "");
				TreeNode match;

				// When texture name is empty, select "All" texture set
				if(string.IsNullOrEmpty(selectname) || selectname == "-")
				{
					match = tvTextureSets.Nodes[tvTextureSets.Nodes.Count - 1];
				}
				else
				{
					match = FindNodeByName(tvTextureSets.Nodes, selectname);
				}

				if(match != null)
				{
					IFilledTextureSet set = (match.Tag as IFilledTextureSet);
					foreach(ImageData img in (browseflats ? set.Flats : set.Textures))
					{
						if(img.LongName == longname)
						{
							selectedset = match;
							break;
						}
					}
				}

				//mxd. If the selected texture was not found in the last-selected set, try finding it in the other sets
				if(selectedset == null && selecttexture != "-")
				{
					foreach(TreeNode n in tvTextureSets.Nodes)
					{
						selectedset = FindTextureByLongName(n, longname);
						if(selectedset != null) break;
					}
				}

				//mxd. Texture still not found? Then just select the last used set
				if(selectedset == null && match != null) selectedset = match;
			}

			//mxd. Select the found set or "All", if none were found
			if (tvTextureSets.Nodes.Count > 0)
			{
				if (selectedset == null) selectedset = tvTextureSets.Nodes[tvTextureSets.Nodes.Count - 1];
				tvTextureSets.SelectedNodes.Clear();
				tvTextureSets.SelectedNodes.Add(selectedset);
				selectedset.EnsureVisible();
			}

			tvTextureSets.EndUpdate();//mxd

			// Keep last position and size
			lastposition = this.Location;
			lastsize = this.Size;

			this.SuspendLayout();

			// Position window from configuration settings
			this.Size = new Size(General.Settings.ReadSetting("browserwindow.sizewidth", this.Size.Width),
								 General.Settings.ReadSetting("browserwindow.sizeheight", this.Size.Height));
			this.WindowState = (FormWindowState)General.Settings.ReadSetting("browserwindow.windowstate", (int)FormWindowState.Normal);
			
			//mxd
			if (this.WindowState == FormWindowState.Normal) 
			{
				Point location = new Point(General.Settings.ReadSetting("browserwindow.positionx", int.MaxValue), General.Settings.ReadSetting("browserwindow.positiony", int.MaxValue));
				if (location.X < int.MaxValue && location.Y < int.MaxValue) 
				{
					this.Location = location;
				} 
				else 
				{
					this.StartPosition = FormStartPosition.CenterParent;
				}
			}

			this.ResumeLayout(true);

			//mxd. Set splitter position and state (doesn't work when layout is suspended)
			if(General.Settings.ReadSetting("browserwindow.splittercollapsed", false)) splitter.IsCollapsed = true;

			//mxd. Looks like SplitterDistance is unaffected by DPI scaling. Let's fix that...
			int splitterdistance = General.Settings.ReadSetting("browserwindow.splitterdistance", int.MinValue);
			if(splitterdistance == int.MinValue)
			{
				splitterdistance = 210;
				if(MainForm.DPIScaler.Width != 1.0f)
				{
					splitterdistance = (int)Math.Round(splitterdistance * MainForm.DPIScaler.Width);
				}
			}

			splitter.SplitPosition = splitterdistance;
		}

		//mxd
		private static int SortImageData(ImageData img1, ImageData img2) 
		{
			return img1.FullName.CompareTo(img2.FullName);
		}

		//mxd
		private TreeNode FindTextureByLongName(TreeNode node, long longname) 
		{
			//first search in child nodes
			TreeNode match;

			foreach(TreeNode n in node.Nodes) 
			{
				match = FindTextureByLongName(n, longname);
				if(match != null) return match;
			}

			//then - in current node
			IFilledTextureSet set = (node.Tag as IFilledTextureSet);

			foreach(ImageData img in (browseflats ? set.Flats : set.Textures))
				if(img.LongName == longname) return node;

			return null;
		}

		//mxd
		private static TreeNode FindNodeByName(TreeNodeCollection nodes, string selectname) 
		{
			foreach (TreeNode n in nodes) 
			{
				if (n.Name == selectname) return n;

				TreeNode match = FindNodeByName(n.Nodes, selectname);
				if(match != null) return match;
			}
			return null;
		}

		//mxd
		private void CreateNodes(TreeNode root) 
		{
			ResourceTextureSet set = root.Tag as ResourceTextureSet;
			if (set == null) 
			{
				General.ErrorLogger.Add(ErrorType.Error, "Resource " + root.Name + " doesn't have TextureSet!");
				return;
			}

			int imageIndex = set.Location.type + 5;
			char[] separator = new[] { Path.AltDirectorySeparatorChar };
			
			ImageData[] images;
			if (browseflats)
			{
				images = new ImageData[set.Flats.Count];
				set.Flats.CopyTo(images, 0);
			}
			else
			{
				images = new ImageData[set.Textures.Count];
				set.Textures.CopyTo(images, 0);
			}
			Array.Sort(images, SortImageData);

			foreach(ImageData image in images) 
			{
				string[] parts = image.VirtualName.Split(separator, StringSplitOptions.RemoveEmptyEntries);
				TreeNode curNode = root;

				if (parts.Length == 1) continue;
				int localindex = (parts[0] == "[TEXTURES]" ? 8 : imageIndex);

				string category = set.Name;
				for(int i = 0; i < parts.Length - 1; i++) 
				{
					//string category = parts[i];
					category += (Path.DirectorySeparatorChar + parts[i]);
					
					//already got such category?
					if (curNode.Nodes.Count > 0 && curNode.Nodes.ContainsKey(category)) 
					{
						curNode = curNode.Nodes[category];
					} 
					else //create a new one
					{
						TreeNode n = new TreeNode(parts[i]) { Name = category, ImageIndex = localindex, SelectedImageIndex = localindex };

						curNode.Nodes.Add(n);
						curNode = n;

						ResourceTextureSet ts = new ResourceTextureSet(category, set.Location);
						ts.Level = i + 1;
						curNode.Tag = ts;
					}

					//add to current and parent nodes
					if(i == parts.Length - 2) 
					{
						TreeNode cn = curNode;
						while (cn != root) 
						{
							ResourceTextureSet curTs = cn.Tag as ResourceTextureSet;
							if (image.IsFlat)
								curTs.AddFlat(image);
							else
								curTs.AddTexture(image);
							cn = cn.Parent;
						}
					}
				}
			}

			if(root.Nodes.Count == 1 && root.Nodes[0].Nodes.Count > 0) 
			{
				TreeNode[] children = new TreeNode[root.Nodes[0].Nodes.Count];
				root.Nodes[0].Nodes.CopyTo(children, 0);
				root.Nodes.Clear();
				root.Nodes.AddRange(children);
				((ResourceTextureSet)root.Tag).Level++;
			}

			foreach (TreeNode n in root.Nodes) SetItemsCount(n);
		}

		//mxd
		private void SetItemsCount(TreeNode node) 
		{
			ResourceTextureSet ts = node.Tag as ResourceTextureSet;
			if (ts == null) throw new Exception("Expected IFilledTextureSet, but got null...");
			

			if (node.Parent != null && General.Map.Config.MixTexturesFlats)
			{
				ts.MixTexturesAndFlats();
				node.Text += " [" + ts.Textures.Count + "]";
			} 
			else
			{
				node.Text += " [" + (browseflats ? ts.Flats.Count : ts.Textures.Count) + "]";
			}

			foreach (TreeNode child in node.Nodes) SetItemsCount(child);
		}

		// Selection changed
		private void browser_SelectedItemChanged()
		{
			apply.Enabled = (browser.SelectedItem != null);
		}

		// OK clicked
		private void apply_Click(object sender, EventArgs e)
		{
			// Set selected name and close
			if(browser.SelectedItem != null)
			{
				ImageBrowserItem item = browser.SelectedItem as ImageBrowserItem;
				selectedname = item.TextureName;
				DialogResult = DialogResult.OK;
			}
			else
			{
				selectedname = "";
				DialogResult = DialogResult.Cancel;
			}
			this.Close();
		}

		// Cancel clicked
		private void cancel_Click(object sender, EventArgs e)
		{
			// No selection, close
			selectedname = "";
			DialogResult = DialogResult.Cancel;
			this.Close();
		}

		// Activated
		private void TextureBrowserForm_Activated(object sender, EventArgs e)
		{
			Cursor.Current = Cursors.Default;
			General.Interface.EnableProcessing(); //mxd
		}

		// Loading
		private void TextureBrowserForm_Load(object sender, EventArgs e)
		{
			// Normal windowstate?
			if(this.WindowState == FormWindowState.Normal)
			{
				// Keep last position and size
				lastposition = this.Location;
				lastsize = this.Size;
			}
		}

		// Resized
		private void TextureBrowserForm_ResizeEnd(object sender, EventArgs e)
		{
			// Normal windowstate?
			if(this.WindowState == FormWindowState.Normal)
			{
				// Keep last position and size
				lastposition = this.Location;
				lastsize = this.Size;
			}
		}

		// Moved
		private void TextureBrowserForm_Move(object sender, EventArgs e)
		{
			// Normal windowstate?
			if(this.WindowState == FormWindowState.Normal)
			{
				// Keep last position and size
				lastposition = this.Location;
				lastsize = this.Size;
			}
		}

		// Closing
		private void TextureBrowserForm_FormClosing(object sender, FormClosingEventArgs e)
		{
			int windowstate;

			// Determine window state to save
			if(this.WindowState != FormWindowState.Minimized)
				windowstate = (int)this.WindowState;
			else
				windowstate = (int)FormWindowState.Normal;

			// Save window settings
			General.Settings.WriteSetting("browserwindow.positionx", lastposition.X);
			General.Settings.WriteSetting("browserwindow.positiony", lastposition.Y);
			General.Settings.WriteSetting("browserwindow.sizewidth", lastsize.Width);
			General.Settings.WriteSetting("browserwindow.sizeheight", lastsize.Height);
			General.Settings.WriteSetting("browserwindow.windowstate", windowstate);
			General.Settings.WriteSetting("browserwindow.splitterdistance", splitter.SplitPosition); //mxd
			General.Settings.WriteSetting("browserwindow.splittercollapsed", splitter.IsCollapsed); //mxd
			General.Settings.WriteSetting("browserwindow.usedgroupcollapsed", browser.IsGroupCollapsed(usedgroup)); //mxd

			//mxd. Save last selected texture set, if it's not "All" (it will be selected anyway if search for initial texture set fails)
			if(this.DialogResult == DialogResult.OK && tvTextureSets.SelectedNodes.Count > 0 && !(tvTextureSets.SelectedNodes[0].Tag is AllTextureSet))
				General.Settings.WriteSetting("browserwindow.textureset", tvTextureSets.SelectedNodes[0].Name);

			//mxd. Save ImageBrowserControl settings
			General.Settings.WriteSetting("browserwindow.showtexturesfromsubdirs", ImageBrowserControl.ShowTexturesFromSubDirectories);
			if(General.Map.Config.UseLongTextureNames) General.Map.Options.UseLongTextureNames = ImageBrowserControl.UseLongTextureNames;
			
			// Clean up
			browser.CleanUp();
		}

		// Static method to browse for texture or flat
		// Returns null when cancelled.
		public static string Browse(IWin32Window parent, string select, bool browseFlats)
		{
			TextureBrowserForm browser = new TextureBrowserForm(select, browseFlats);
			if(browser.ShowDialog(parent) == DialogResult.OK) return browser.SelectedName; // Return result
			
			// Cancelled
			return select;
		}

		// Item double clicked
		private void browser_SelectedItemDoubleClicked()
		{
			if(apply.Enabled) apply_Click(this, EventArgs.Empty);
		}

		// This fills the list of textures, depending on the selected texture set
		private void FillImagesList()
		{
			// Get the selected texture set
			IFilledTextureSet set = (selectedset.Tag as IFilledTextureSet);

			// Start adding
			browser.BeginAdding(set.Level, false); //mxd. Pass current folder level

			if (browseflats) 
			{
				// Add all available flats
				foreach(ImageData img in set.Flats)
					browser.Add(img, img, availgroup);

				// Add all used flats
				foreach(ImageData img in set.Flats)
					if(img.UsedInMap) browser.Add(img, img, usedgroup);
			}
			else
			{
				// Add all available textures and mark the images for temporary loading
				foreach (ImageData img in set.Textures)
					browser.Add(img, img, availgroup);

				// Add all used textures and mark the images for permanent loading
				foreach (ImageData img in set.Textures)
					if(img.UsedInMap) browser.Add(img, img, usedgroup);
			}
			
			// Done adding
			browser.EndAdding();
		}

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

		private void TextureBrowserForm_Shown(object sender, EventArgs e)
		{
			if (selectedset != null) //mxd. Calling FillImagesList() from constructor leads to TERRIBLE load times. Why? I have no sodding idea...
				FillImagesList();
			
			// Select texture
			if(selecttextureonfill != 0)
			{
				browser.SelectItem(selecttextureonfill, (usedgroupcollapsed ? availgroup : usedgroup)); //mxd. availgroup/usedgroup switch.
				selecttextureonfill = 0;
			}

			//mxd. Focus the textbox. Calling this from TextureBrowserForm_Activated (like it's done in DB2) fails when the form is maximized. Again, I've no idea why...
			browser.FocusTextbox();
		}

		//mxd
		private void tvTextureSets_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e) 
		{
			selectedset = e.Node;
			FillImagesList();
		}

		//mxd
		private void tvTextureSets_KeyUp(object sender, KeyEventArgs e) 
		{
			if(tvTextureSets.SelectedNodes.Count > 0 && tvTextureSets.SelectedNodes[0] != selectedset) 
			{
				selectedset = tvTextureSets.SelectedNodes[0];
				FillImagesList();
			}
		}
	}
}