using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;
using System.Xml.Schema;

namespace WoL_Manager
	{
	class ManagerSettings
		{
		private static int ping_timeout = 1000;
		private static int ping_waittime = 3;
		private static int wake_waittime = 5*60;

		public static int PingTimeOut
			{
			set
				{
				ping_timeout = value;
				}
			get
				{
				return ping_timeout;
				}
			}

		public static int PingWaitTime
			{
			set
				{
				ping_waittime = value;
				}
			get
				{
				return ping_waittime;
				}
			}

		public static int WakeWaitTime
			{
			set
				{
				wake_waittime = value;
				}
			get
				{
				return wake_waittime;
				}
			}

		public static void createDTD(string file)
			{
			string temp = "<?xml version='1.0' encoding='utf-8'?>\n\n<!ELEMENT settings (ping_timeout, ping_waittime, wake_waittime)>\n<!ELEMENT ping_timeout (#PCDATA)>\n<!ELEMENT ping_waittime (#PCDATA)>\n<!ELEMENT wake_waittime (#PCDATA)>";
			System.IO.File.WriteAllText(file, temp);
			}

		public static void writeToFile(string file)
			{
			string temp = "<?xml version='1.0' encoding='utf-8'?>\n<!DOCTYPE settings SYSTEM 'settings.dtd'>\n\n<settings>";
			temp = String.Concat(temp, "\n<ping_timeout>", ManagerSettings.PingTimeOut.ToString(), "</ping_timeout>");
			temp = String.Concat(temp, "\n<ping_waittime>", ManagerSettings.PingWaitTime.ToString(), "</ping_waittime>");
			temp = String.Concat(temp, "\n<wake_waittime>", ManagerSettings.WakeWaitTime.ToString(), "</wake_waittime>");
			temp = String.Concat(temp, "\n</settings>");
			System.IO.File.WriteAllText(file, temp);
			}


		private static void validationEventHandler(object sender, ValidationEventArgs args)
			{
			valitationResult = false;
			}

		private static bool valitationResult = true;

		public static bool readFromFile(string file)
			{
			XmlReaderSettings settings = new XmlReaderSettings();
			settings.IgnoreWhitespace = true;
			settings.IgnoreComments = true;
			settings.IgnoreProcessingInstructions = true;
			settings.ProhibitDtd = false;
			settings.ValidationType = ValidationType.DTD;
			settings.ValidationEventHandler += new ValidationEventHandler(validationEventHandler);
			XmlReader reader = XmlReader.Create(file, settings);
			while (reader.Read())
				{
				if (reader.NodeType == XmlNodeType.Element && reader.LocalName.CompareTo("settings") == 0)
					{
					string p_timeout;
					string p_waittime;
					string w_waittime;
					int temp1, temp2, temp3;
					reader.Read();
					p_timeout = reader.ReadString();
					reader.Read();
					p_waittime = reader.ReadString();
					reader.Read();
					w_waittime = reader.ReadString();
					
					try
						{
						temp1 = Int32.Parse(p_timeout);
						temp2 = Int32.Parse(p_waittime);
						temp3 = Int32.Parse(w_waittime);
						}
					catch (Exception)
						{
						reader.Close();
						return false;
						}
					if (temp1 < 1 || temp1 > 30000)
						{
						reader.Close();
						return false;
						}
					if (temp2 < 1 || temp2 > 30000)
						{
						reader.Close();
						return false;
						}
					if (temp3 < 1 || temp3 > 30000)
						{
						reader.Close();
						return false;
						}
					if (valitationResult == false)
						{
						reader.Close();
						return false;
						}
					ping_timeout = temp1;
					ping_waittime = temp2;
					wake_waittime = temp3;
					}
				}
			reader.Close();
			return true;
			}
		}
	}