#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.Collections.Generic;
using System.Windows.Forms;
using CodeImp.DoomBuilder.Map;
using CodeImp.DoomBuilder.Rendering;
using CodeImp.DoomBuilder.Config;
using CodeImp.DoomBuilder.Types;

#endregion

namespace CodeImp.DoomBuilder.BuilderModes
{
	[FindReplace("Thing Thing Reference", BrowseButton = false)]
	internal class FindThingThingRef : BaseFindThing
	{
		#region ================== Constants

		#endregion

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

		#endregion

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

		public override Presentation RenderPresentation { get { return Presentation.Things; } }

		#endregion

		#region ================== Constructor / Destructor

		#endregion

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

		// This is called to test if the item should be displayed
		public override bool DetermineVisiblity()
		{
			return General.Map.FormatInterface.HasThingAction && General.Map.FormatInterface.HasThingTag;
		}

		// This is called to perform a search (and replace)
		// Returns a list of items to show in the results list
		// replacewith is null when not replacing
		public override FindReplaceObject[] Find(string value, bool withinselection, string replacewith, bool keepselection)
		{
			List<FindReplaceObject> objs = new List<FindReplaceObject>();

			// Interpret the replacement
			int replacetag = 0;
			if(replacewith != null)
			{
				// If it cannot be interpreted, set replacewith to null (not replacing at all)
				if(!int.TryParse(replacewith, out replacetag)) replacewith = null;
				if(replacetag < 0) replacewith = null;
				if(replacetag > 255) replacewith = null;
				if(replacewith == null)
				{
					MessageBox.Show("Invalid replace value for this search type!", "Find and Replace", MessageBoxButtons.OK, MessageBoxIcon.Error);
					return objs.ToArray();
				}
			}

			// Interpret the number given
			int tag = 0;
			if(int.TryParse(value, out tag))
			{
				// Where to search?
				ICollection<Thing> list = withinselection ? General.Map.Map.GetSelectedThings(true) : General.Map.Map.Things;

				// Go for all things
				foreach(Thing t in list)
				{
					bool addthing = false;

					LinedefActionInfo info = General.Map.Config.GetLinedefActionInfo(t.Action);
					if(info.IsKnown && !info.IsNull)
					{
						// Go for all args
						for(int i = 0; i < Linedef.NUM_ARGS; i++)
						{
							// Argument type matches?
							if(info.Args[i].Used && (info.Args[i].Type == (int)UniversalType.ThingTag))
							{
								if(t.Args[i] == tag)
								{
									// Replace
									if(replacewith != null) t.Args[i] = replacetag;
									addthing = true;
								}
							}
						}
					}

					if(addthing)
					{
						// Add to list
						ThingTypeInfo ti = General.Map.Data.GetThingInfo(t.Type);
						objs.Add(new FindReplaceObject(t, "Thing " + t.Index + " (" + ti.Title + ")"));
					}
				}
			}

			return objs.ToArray();
		}

		#endregion
	}
}