#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;
using System.Collections.Generic;
using System.Globalization;
using CodeImp.DoomBuilder.IO;
using CodeImp.DoomBuilder.Types;

#endregion

namespace CodeImp.DoomBuilder.Config
{
	public class ArgumentInfo
	{
		#region ================== Constants

		#endregion

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

		private readonly string title;
		private readonly string tooltip; //mxd
		private readonly bool used;
		private readonly int type;
		private EnumList enumlist;
		private EnumList flagslist; //mxd
		private readonly object defaultvalue; //mxd
		private readonly HashSet<string> targetclasses; //mxd

		#endregion

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

		public string Title { get { return title; } }
		public string ToolTip { get { return tooltip; } } //mxd
		public bool Used { get { return used; } }
		public int Type { get { return type; } }
		public HashSet<string> TargetClasses { get { return targetclasses; } } //mxd
		public EnumList Enum { get { return enumlist; } internal set { enumlist = value; } }
		public EnumList Flags { get { return flagslist; } internal set { flagslist = value; } } //mxd
		public object DefaultValue { get { return defaultvalue; } } //mxd

		#endregion

		#region ================== Constructor / Disposer

		// Constructor for argument info from configuration
		internal ArgumentInfo(Configuration cfg, string argspath, int argindex, IDictionary<string, EnumList> enums)
		{
			// Read
			string istr = argindex.ToString(CultureInfo.InvariantCulture);
			this.used = cfg.SettingExists(argspath + ".arg" + istr);
			this.title = cfg.ReadSetting(argspath + ".arg" + istr + ".title", "Argument " + (argindex + 1));
			this.tooltip = cfg.ReadSetting(argspath + ".arg" + istr + ".tooltip", string.Empty); //mxd
			this.type = cfg.ReadSetting(argspath + ".arg" + istr + ".type", 0);
			this.defaultvalue = cfg.ReadSetting(argspath + ".arg" + istr + ".default", 0); //mxd

			//mxd. Check for TargetClass?
			this.targetclasses = new HashSet<string>(StringComparer.InvariantCultureIgnoreCase);
			if(this.type == (int)UniversalType.ThingTag)
			{
				string s = cfg.ReadSetting(argspath + ".arg" + istr + ".targetclasses", string.Empty);
				if(!string.IsNullOrEmpty(s))
				{
					foreach(string tclass in s.Split(new[] {','}, StringSplitOptions.RemoveEmptyEntries)) 
						targetclasses.Add(tclass.Trim());
				}
			}

			// Determine enum type
			IDictionary argdic = cfg.ReadSetting(argspath + ".arg" + istr, new Hashtable());
			if(argdic.Contains("enum"))
			{
				// Enum fully specified?
				if(argdic["enum"] is IDictionary)
				{
					// Create anonymous enum
					this.enumlist = new EnumList((IDictionary)argdic["enum"]);
				}
				else
				{
					// Check if referenced enum exists
					if((argdic["enum"].ToString().Length > 0) && enums.ContainsKey(argdic["enum"].ToString()))
					{
						// Get the enum list
						this.enumlist = enums[argdic["enum"].ToString()];
					}
					else
					{
						General.ErrorLogger.Add(ErrorType.Warning, "\"" + argspath + ".arg" + istr + "\" references unknown enumeration \"" + argdic["enum"] + "\".");
					}
				}
			}

			//mxd. Determine flags type
			if(argdic.Contains("flags"))
			{
				// Enum fully specified?
				if(argdic["flags"] is IDictionary)
				{
					// Create anonymous enum
					this.flagslist = new EnumList((IDictionary)argdic["flags"]);
				}
				else
				{
					// Check if referenced enum exists
					if((argdic["flags"].ToString().Length > 0) && enums.ContainsKey(argdic["flags"].ToString()))
					{
						// Get the enum list
						this.flagslist = enums[argdic["flags"].ToString()];
					}
					else
					{
						General.ErrorLogger.Add(ErrorType.Warning, "\"" + argspath + ".arg" + istr + "\" references unknown flags enumeration \"" + argdic["flags"] + "\".");
					}
				}
			}
			
			if(this.enumlist == null) this.enumlist = new EnumList(); //mxd
			if(this.flagslist == null) this.flagslist = new EnumList(); //mxd
		}

		//mxd. Constructor for an argument info defined in DECORATE
		internal ArgumentInfo(string actorname, string argtitle, string tooltip, int type, int defaultvalue, string enumstr, IDictionary<string, EnumList> enums)
		{
			this.used = true;
			this.title = argtitle;
			this.tooltip = tooltip;
			this.defaultvalue = defaultvalue;
			this.flagslist = new EnumList(); //mxd

			// Get argument type
			if(System.Enum.IsDefined(typeof(UniversalType), type))
			{
				this.type = type;
			}
			else
			{
				General.ErrorLogger.Add(ErrorType.Error, actorname + ": action argument \"" + argtitle + "\" has unknown type " + type + "!");
				this.type = 0;
			}

			// Get or create enum
			if(!string.IsNullOrEmpty(enumstr))
			{
				if(enums.ContainsKey(enumstr.ToLowerInvariant()))
				{
					this.enumlist = enums[enumstr.ToLowerInvariant()];
				}
				else
				{
					Configuration cfg = new Configuration();
					if(cfg.InputConfiguration("enum" + enumstr, true)) 
					{
						IDictionary argdic = cfg.ReadSetting("enum", new Hashtable());
						if(argdic.Keys.Count > 0)
							this.enumlist = new EnumList(argdic);
						else
							General.ErrorLogger.Add(ErrorType.Error, actorname + ": unable to parse explicit enum structure for argument \"" + argtitle + "\"!");
					} 
					else 
					{
						General.ErrorLogger.Add(ErrorType.Error, actorname + ": unable to parse enum structure for argument \"" + argtitle + "\"!");
					}
				}
			}

			if(this.enumlist == null) this.enumlist = new EnumList();
		}

		// Constructor for unknown argument info
		internal ArgumentInfo(int argindex)
		{
			this.used = false;
			this.title = "Argument " + (argindex + 1);
			this.type = 0;
			this.enumlist = new EnumList();
			this.flagslist = new EnumList(); //mxd
			this.defaultvalue = 0; //mxd
		}

		#endregion

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

		// This gets the description for an argument value
		public string GetValueDescription(int value)
		{
			// TODO: Use the registered type editor to get the description!

			return value.ToString();
		}

		#endregion
	}
}