using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Net.NetworkInformation;
using System.Drawing;
using System.Xml;
using System.Xml.Schema;
using System.IO;

namespace WoL_Manager
	{
	class Host
		{
		private string name;
		private IPAddress ip;
		private string mac_address;
		private IPAddress broadcast;
		private string description;
		private int status;
		private PingThread ping;
		private PingReply lastPingReply;
		private System.DateTime wakeTime;

		private static MainWindow parent = null;
		private static Icon[] iconList = null;
		private static List<Host> hostList = new List<Host>();

		private Host(string name, IPAddress ip, string mac,
					IPAddress broadcast, string description)
			{
			this.name = name;
			this.ip = ip;
			this.mac_address = mac;
			this.broadcast = broadcast;
			this.description = description;
			status = 0;
			ping = null;
			lastPingReply = null;
			wakeTime = DateTime.Now;
			}

		~Host()
			{
			if (ping != null)
				{
				ping.stopThread();
				}
			}

		public static void clearList()
			{
			hostList.Clear();
			}

		public Icon getStatusIcon()
			{
			if (iconList != null && iconList.Length > status)
				{
				return iconList[status];
				}
			else
				{
				return null;
				}
			}

		public static MainWindow Parent
			{
			set
				{
				parent = value;
				}
			get
				{
				return parent;
				}
			}

		public static Icon[] IconList
			{
			set
				{
				iconList = value;
				}
			get
				{
				return iconList;
				}
			}

		public PingThread pingThread
			{
			set
				{
				ping = value;
				}
			get
				{
				return ping;
				}
			}

		public string getStatusString()
			{
			switch (status)
				{
				case 0:
					return "Unknown Status";
				case 1:
					return string.Format("Host online ({0} ms)",lastPingReply.RoundtripTime);
				case 2:
					return string.Format("Host not reachable ({0})", lastPingReply.Status);
				case 3:
					TimeSpan temp = (TimeSpan)(DateTime.Now - wakeTime);
					return string.Format("Waking Host (waiting for {0} m {1} s)", temp.Minutes, temp.Seconds);
				default:
					return "???";
				}
			}

		public PingReply LastPingResult
			{
			get
				{
				return lastPingReply;
				}
			set
				{
				lastPingReply = value;
				if (value.Status == IPStatus.Success)
					{
					status = 1;
					}
				else if (status == 3)
					{
					double temp = ((TimeSpan)(DateTime.Now - wakeTime)).TotalSeconds;
					if (temp > ManagerSettings.WakeWaitTime)
						{
						status = 2;
						}
					}
				else if (status != 3)
					{
					status = 2;
					}
				parent.updateDataView();
				}
			}

		public bool wakeHost()
			{
			bool temp = Magic_Packet.sendPacket(this);
			if (temp)
				{
				status = 3;
				wakeTime = System.DateTime.Now;
				}
			return 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("host") == 0)
					{
					string name;
					string ip;
					string bc;
					string mac;
					string desc;
					System.Net.IPAddress ip_adr;
					System.Net.IPAddress bc_adr;
					reader.Read();
					name = reader.ReadString();
					reader.Read();
					ip = reader.ReadString();
					reader.Read();
					bc = reader.ReadString();
					reader.Read();
					mac = reader.ReadString();
					if (!MainWindow.checkMAC(mac))
						{
						reader.Close();
						return false;
						}
					reader.Read();
					desc = reader.ReadString();
					try
						{
						ip_adr = System.Net.IPAddress.Parse(ip);
						bc_adr = System.Net.IPAddress.Parse(bc);
						}
					catch (Exception)
						{
						reader.Close();
						return false;
						}
					if (valitationResult == false)
						{
						reader.Close();
						return false;
						}
					Host.createHost(name, ip_adr, mac, bc_adr, desc);
					}
				}
			reader.Close();
			return true;
			}

		public static void createDTD(string file)
			{
			string temp = "<?xml version='1.0' encoding='utf-8'?>\n\n<!ELEMENT hostlist (host*)>\n<!ELEMENT host (name, ip_address, broadcast, mac_address, description)>\n<!ELEMENT name (#PCDATA)>\n<!ELEMENT ip_address (#PCDATA)>\n<!ELEMENT broadcast (#PCDATA)>\n<!ELEMENT mac_address (#PCDATA)>\n<!ELEMENT description (#PCDATA)>";
			File.WriteAllText(file, temp);
			}

		public static void writeToFile(string file)
			{
			Host[] hostList = Host.getHostList();
			string temp = "<?xml version='1.0' encoding='utf-8'?>\n<!DOCTYPE hostlist SYSTEM 'hosts.dtd'>\n\n<hostlist>";
			if (hostList != null && hostList.Length > 0)
				{
				for (int t = 0; t < hostList.Length; t++)
					{
					temp = String.Concat(temp, "\n<host>\n<name>", hostList[t].Name, "</name>");
					temp = String.Concat(temp, "\n<ip_address>", hostList[t].IP.ToString(), "</ip_address>");
					temp = String.Concat(temp, "\n<broadcast>", hostList[t].Broadcast.ToString(), "</broadcast>");
					temp = String.Concat(temp, "\n<mac_address>", hostList[t].MAC, "</mac_address>");
					temp = String.Concat(temp, "\n<description>", hostList[t].Description, "</description>\n</host>");
					}
				}
			temp = String.Concat(temp,"\n</hostlist>");
			File.WriteAllText(file,temp);
			}


		public int Status
			{
			get
				{
				return status;
				}
			set
				{
				status = value;
				}
			}

		public string Name
			{
			get
				{
				return name;
				}
			set
				{
				name = value;
				}
			}

		public IPAddress IP
			{
			get
				{
				return ip;
				}
			set
				{
				ip = value;
				}
			}

		public string MAC
			{
			get
				{
				return mac_address;
				}
			set
				{
				mac_address = value;
				}
			}

		public IPAddress Broadcast
			{
			get
				{
				return broadcast;
				}
			set
				{
				broadcast = value;
				}
			}

		public string Description
			{
			get
				{
				return description;
				}
			set
				{
				description = value;
				}
			}

		public static Host createHost(string name, IPAddress ip, string mac,
							IPAddress broadcast, string description)
			{
			Host temp = new Host(name, ip, mac, broadcast, description);
			hostList.Add(temp);
			return temp;
			}

		public static bool deleteHost(Host host)
			{
			host.pingThread.stopThread();
			return hostList.Remove(host);
			}

		public static Host[] getHostList()
			{
			return hostList.ToArray();
			}
		}
	}