#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 System.Text;
using CodeImp.DoomBuilder.IO;
using CodeImp.DoomBuilder.Data;
using System.IO;
using System.Diagnostics;
using System.Windows.Forms;
using CodeImp.DoomBuilder.Map;

#endregion

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

		#endregion

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

		// Original configuration
		private Configuration cfg;
		
		// Cached variables
		private int undolevels;
		private bool blackbrowsers;
		private int visualfov;
		private float visualmousesensx;
		private float visualmousesensy;
		private float visualviewrange;
		private int imagebrightness;
		private bool qualitydisplay;
		private bool squarethings;
		
		// These are not stored in the configuration, only used at runtime
		private string defaulttexture;
		private int defaultbrightness = 192;
		private int defaultfloorheight = 0;
		private int defaultceilheight = 128;
		private string defaultfloortexture;
		private string defaultceiltexture;
		
		#endregion

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

		internal Configuration Config { get { return cfg; } }
		public int UndoLevels { get { return undolevels; } internal set { undolevels = value; } }
		public bool BlackBrowsers { get { return blackbrowsers; } internal set { blackbrowsers = value; } }
		public int VisualFOV { get { return visualfov; } internal set { visualfov = value; } }
		public int ImageBrightness { get { return imagebrightness; } internal set { imagebrightness = value; } }
		public float VisualMouseSensX { get { return visualmousesensx; } internal set { visualmousesensx = value; } }
		public float VisualMouseSensY { get { return visualmousesensy; } internal set { visualmousesensy = value; } }
		public float VisualViewRange { get { return visualviewrange; } internal set { visualviewrange = value; } }
		public bool QualityDisplay { get { return qualitydisplay; } internal set { qualitydisplay = value; } }
		public bool SquareThings { get { return squarethings; } internal set { squarethings = value; } }

		public string DefaultTexture { get { return defaulttexture; } set { defaulttexture = value; } }
		public string DefaultFloorTexture { get { return defaultfloortexture; } set { defaultfloortexture = value; } }
		public string DefaultCeilingTexture { get { return defaultceiltexture; } set { defaultceiltexture = value; } }
		public int DefaultBrightness { get { return defaultbrightness; } set { defaultbrightness = value; } }
		public int DefaultFloorHeight { get { return defaultfloorheight; } set { defaultfloorheight = value; } }
		public int DefaultCeilingHeight { get { return defaultceilheight; } set { defaultceilheight = value; } }

		#endregion

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

		// Constructor
		internal ProgramConfiguration()
		{
			// We have no destructor
			GC.SuppressFinalize(this);
		}

		#endregion

		#region ================== Loading / Saving

		// This loads the program configuration
		internal bool Load(string cfgfilepathname, string defaultfilepathname)
		{
			// First parse it
			if(Read(cfgfilepathname, defaultfilepathname))
			{
				// Read the cache variables
				blackbrowsers = cfg.ReadSetting("blackbrowsers", false);
				undolevels = cfg.ReadSetting("undolevels", 20);
				visualfov = cfg.ReadSetting("visualfov", 80);
				visualmousesensx = cfg.ReadSetting("visualmousesensx", 40f);
				visualmousesensy = cfg.ReadSetting("visualmousesensy", 40f);
				visualviewrange = cfg.ReadSetting("visualviewrange", 1000f);
				imagebrightness = cfg.ReadSetting("imagebrightness", 3);
				qualitydisplay = cfg.ReadSetting("qualitydisplay", true);
				squarethings = cfg.ReadSetting("squarethings", false);
				
				// Success
				return true;
			}
			else
			{
				// Failed
				return false;
			}
		}

		// This saves the program configuration
		internal void Save(string filepathname)
		{
			// Write the cache variables
			cfg.WriteSetting("blackbrowsers", blackbrowsers);
			cfg.WriteSetting("undolevels", undolevels);
			cfg.WriteSetting("visualfov", visualfov);
			cfg.WriteSetting("visualmousesensx", visualmousesensx);
			cfg.WriteSetting("visualmousesensy", visualmousesensy);
			cfg.WriteSetting("visualviewrange", visualviewrange);
			cfg.WriteSetting("imagebrightness", imagebrightness);
			cfg.WriteSetting("qualitydisplay", qualitydisplay);
			cfg.WriteSetting("squarethings", squarethings);

			// Save settings configuration
			General.WriteLogLine("Saving program configuration...");
			cfg.SaveConfiguration(filepathname);
		}
		
		// This reads the configuration
		private bool Read(string cfgfilepathname, string defaultfilepathname)
		{
			DialogResult result;

			// Check if no config for this user exists yet
			if(!File.Exists(cfgfilepathname))
			{
				// Copy new configuration
				General.WriteLogLine("Local user program configuration is missing!");
				File.Copy(defaultfilepathname, cfgfilepathname);
				General.WriteLogLine("New program configuration copied for local user");
			}

			// Load it
			cfg = new Configuration(cfgfilepathname, true);
			if(cfg.ErrorResult != 0)
			{
				// Error in configuration
				// Ask user for a new copy
				result = General.ShowErrorMessage("Error in program configuration near line " + cfg.ErrorLine + ": " + cfg.ErrorDescription, MessageBoxButtons.YesNoCancel);
				if(result == DialogResult.Yes)
				{
					// Remove old configuration and make a new copy
					General.WriteLogLine("User requested a new copy of the program configuration");
					File.Delete(cfgfilepathname);
					File.Copy(defaultfilepathname, cfgfilepathname);
					General.WriteLogLine("New program configuration copied for local user");

					// Load it
					cfg = new Configuration(cfgfilepathname, true);
					if(cfg.ErrorResult != 0)
					{
						// Error in configuration
						General.WriteLogLine("Error in program configuration near line " + cfg.ErrorLine + ": " + cfg.ErrorDescription);
						General.ShowErrorMessage("Default program configuration is corrupted. Please re-install Doom Builder.", MessageBoxButtons.OK);
						return false;
					}
				}
				else if(result == DialogResult.Cancel)
				{
					// User requested to cancel startup
					General.WriteLogLine("User cancelled startup");
					return false;
				}
			}

			// Success
			return true;
		}
		
		#endregion

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

		// ReadSetting
		public string ReadSetting(string setting, string defaultsetting) { return cfg.ReadSetting(setting, defaultsetting); }
		public int ReadSetting(string setting, int defaultsetting) { return cfg.ReadSetting(setting, defaultsetting); }
		public float ReadSetting(string setting, float defaultsetting) { return cfg.ReadSetting(setting, defaultsetting); }
		public short ReadSetting(string setting, short defaultsetting) { return cfg.ReadSetting(setting, defaultsetting); }
		public long ReadSetting(string setting, long defaultsetting) { return cfg.ReadSetting(setting, defaultsetting); }
		public bool ReadSetting(string setting, bool defaultsetting) { return cfg.ReadSetting(setting, defaultsetting); }
		public byte ReadSetting(string setting, byte defaultsetting) { return cfg.ReadSetting(setting, defaultsetting); }
		public IDictionary ReadSetting(string setting, IDictionary defaultsetting) { return cfg.ReadSetting(setting, defaultsetting); }

		// WriteSetting
		internal bool WriteSetting(string setting, object settingvalue) { return cfg.WriteSetting(setting, settingvalue); }
		internal bool WriteSetting(string setting, object settingvalue, string pathseperator) { return cfg.WriteSetting(setting, settingvalue, pathseperator); }
		
		// This attempts to find the default drawing settings
		public void FindDefaultDrawSettings()
		{
			bool foundone;
			
			// Only possible when a map is loaded
			if(General.Map == null) return;
			
			// Default texture missing?
			if((defaulttexture == null) || defaulttexture.StartsWith("-"))
			{
				// Find default texture from map
				foundone = false;
				foreach(Sidedef sd in General.Map.Map.Sidedefs)
				{
					if(!sd.MiddleTexture.StartsWith("-"))
					{
						foundone = true;
						defaulttexture = sd.MiddleTexture;
						break;
					}
				}
				
				// Not found yet?
				if(!foundone)
				{
					// Pick the first STARTAN from the list.
					// I love the STARTAN texture as default for some reason.
					foreach(string s in General.Map.Data.TextureNames)
					{
						if(s.StartsWith("STARTAN"))
						{
							foundone = true;
							defaulttexture = s;
							break;
						}
					}
					
					// Otherwise just pick the first
					if(!foundone)
					{
						if(General.Map.Data.TextureNames.Count > 1)
							defaulttexture = General.Map.Data.TextureNames[1];
					}
				}
			}

			// Default floor missing?
			if((defaultfloortexture == null) || (defaultfloortexture.Length == 0))
			{
				// Find default texture from map
				foundone = false;
				if(General.Map.Map.Sectors.Count > 0)
				{
					foundone = true;
					defaultfloortexture = General.GetByIndex<Sector>(General.Map.Map.Sectors, 0).FloorTexture;
				}

				// Pick the first FLOOR from the list.
				foreach(string s in General.Map.Data.FlatNames)
				{
					if(s.StartsWith("FLOOR"))
					{
						foundone = true;
						defaultfloortexture = s;
						break;
					}
				}

				// Otherwise just pick the first
				if(!foundone)
				{
					if(General.Map.Data.FlatNames.Count > 0)
						defaultfloortexture = General.Map.Data.FlatNames[0];
				}
			}

			// Default ceiling missing?
			if((defaultceiltexture == null) || (defaultceiltexture.Length == 0))
			{
				// Find default texture from map
				foundone = false;
				if(General.Map.Map.Sectors.Count > 0)
				{
					foundone = true;
					defaultceiltexture = General.GetByIndex<Sector>(General.Map.Map.Sectors, 0).CeilTexture;
				}

				// Pick the first FLOOR from the list.
				foreach(string s in General.Map.Data.FlatNames)
				{
					if(s.StartsWith("FLOOR"))
					{
						foundone = true;
						defaultceiltexture = s;
						break;
					}
				}

				// Otherwise just pick the first
				if(!foundone)
				{
					if(General.Map.Data.FlatNames.Count > 1)
						defaultceiltexture = General.Map.Data.FlatNames[1];
				}
			}
		}
		
		#endregion
	}
}