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

using System.Collections.Generic;
using System.Windows.Forms;
using CodeImp.DoomBuilder.Map;

#endregion

namespace CodeImp.DoomBuilder.BuilderModes.FindReplace
{
	[FindReplace("Sector Floor Height", BrowseButton = false)]
	internal class FindSectorFloorHeight : BaseFindSector
	{
		#region ================== Properties

		//mxd. Prefixes usage
		public override string UsageHint
		{
			get
			{
				return "Supported prefixes:" + System.Environment.NewLine
				   + "\"<=\" for values less or equal to given value;" + System.Environment.NewLine
				   + "\">=\" for values greater or equal to given value;" + System.Environment.NewLine
				   + "\"<\" for values less than given value;" + System.Environment.NewLine
				   + "\">\" for values greater than given value." + System.Environment.NewLine
				   + "\"!\" or \"!=\" for values not equal to given value.";
			}
		}

		#endregion

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

		// 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, bool replace, string replacewith, bool keepselection) 
		{
			List<FindReplaceObject> objs = new List<FindReplaceObject>();

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

			// Check for comparison operators
			string comparer = "";
			if (value[0].ToString() == ">" || value[0].ToString() == "<" || value[0].ToString() == "!")
			{
				comparer = value.Substring(0, 1);
				if (value.Length > 1)
					if (value[1].ToString() == "=")
						comparer = value.Substring(0, 2);
				value = value.Remove(0, comparer.Length);
			}

			if (value.Length == 0)
				return objs.ToArray();

			// Interpret the number given
			int height;
			if(int.TryParse(value, out height)) 
			{
				// Where to search?
				ICollection<Sector> list = withinselection ? General.Map.Map.GetSelectedSectors(true) : General.Map.Map.Sectors;

				// Go for all sectors
				foreach(Sector s in list) 
				{
					// Height matches?
					if ((s.FloorHeight == height && comparer.ToString() == "") ||
						(s.FloorHeight > height && comparer.ToString() == ">") ||
						(s.FloorHeight < height && comparer.ToString() == "<") ||
						(s.FloorHeight >= height && comparer.ToString() == ">=") ||
						(s.FloorHeight <= height && comparer.ToString() == "<=") ||
						(s.FloorHeight != height && (comparer.ToString() == "!" || comparer.ToString() == "!=")))
					{
						// Replace
						if(replace) s.FloorHeight = replaceheight;

						objs.Add(new FindReplaceObject(s, "Sector " + s.Index));
					}
				}
			}

			//refresh map
			if(replace) 
			{
				General.Map.Map.Update();
				General.Map.IsChanged = true;
			}

			return objs.ToArray();
		}

		#endregion
	}
}