using System;
using System.Collections.Generic;
using Server.Commands;
using Server.Mobiles;
using Server.Network;

namespace Server.Gumps
{
	public class WhoGump : Gump
	{
		public static void Initialize()
		{
			CommandSystem.Register( "Who", AccessLevel.Counselor, new CommandEventHandler( WhoList_OnCommand ) );
			CommandSystem.Register( "WhoList", AccessLevel.Counselor, new CommandEventHandler( WhoList_OnCommand ) );
		}

		[Usage( "WhoList [filter]" )]
		[Aliases( "Who" )]
		[Description( "Lists all connected clients. Optionally filters results by name." )]
		private static void WhoList_OnCommand( CommandEventArgs e )
		{
			e.Mobile.SendGump( new WhoGump( e.Mobile, e.ArgString ) );
		}

		public static bool OldStyle = PropsConfig.OldStyle;

		public static readonly int GumpOffsetX = PropsConfig.GumpOffsetX;
		public static readonly int GumpOffsetY = PropsConfig.GumpOffsetY;

		public static readonly int TextHue = PropsConfig.TextHue;
		public static readonly int TextOffsetX = PropsConfig.TextOffsetX;

		public static readonly int OffsetGumpID = PropsConfig.OffsetGumpID;
		public static readonly int HeaderGumpID = PropsConfig.HeaderGumpID;
		public static readonly int  EntryGumpID = PropsConfig.EntryGumpID;
		public static readonly int   BackGumpID = PropsConfig.BackGumpID;
		public static readonly int    SetGumpID = PropsConfig.SetGumpID;

		public static readonly int SetWidth = PropsConfig.SetWidth;
		public static readonly int SetOffsetX = PropsConfig.SetOffsetX, SetOffsetY = PropsConfig.SetOffsetY;
		public static readonly int SetButtonID1 = PropsConfig.SetButtonID1;
		public static readonly int SetButtonID2 = PropsConfig.SetButtonID2;

		public static readonly int PrevWidth = PropsConfig.PrevWidth;
		public static readonly int PrevOffsetX = PropsConfig.PrevOffsetX, PrevOffsetY = PropsConfig.PrevOffsetY;
		public static readonly int PrevButtonID1 = PropsConfig.PrevButtonID1;
		public static readonly int PrevButtonID2 = PropsConfig.PrevButtonID2;

		public static readonly int NextWidth = PropsConfig.NextWidth;
		public static readonly int NextOffsetX = PropsConfig.NextOffsetX, NextOffsetY = PropsConfig.NextOffsetY;
		public static readonly int NextButtonID1 = PropsConfig.NextButtonID1;
		public static readonly int NextButtonID2 = PropsConfig.NextButtonID2;

		public static readonly int OffsetSize = PropsConfig.OffsetSize;

		public static readonly int EntryHeight = PropsConfig.EntryHeight;
		public static readonly int BorderSize = PropsConfig.BorderSize;

		private static bool PrevLabel = false, NextLabel = false;

		private static readonly int PrevLabelOffsetX = PrevWidth + 1;
		private static readonly int PrevLabelOffsetY = 0;

		private static readonly int NextLabelOffsetX = -29;
		private static readonly int NextLabelOffsetY = 0;

		private static readonly int EntryWidth = 180;
		private static readonly int EntryCount = 15;

		private static readonly int TotalWidth = OffsetSize + EntryWidth + OffsetSize + SetWidth + OffsetSize;
		private static readonly int TotalHeight = OffsetSize + ((EntryHeight + OffsetSize) * (EntryCount + 1));

		private static readonly int BackWidth = BorderSize + TotalWidth + BorderSize;
		private static readonly int BackHeight = BorderSize + TotalHeight + BorderSize;

		private Mobile m_Owner;
		private List<Mobile> m_Mobiles;
		private int m_Page;

		private class InternalComparer : IComparer<Mobile>
		{
			public static readonly IComparer<Mobile> Instance = new InternalComparer();

			public InternalComparer()
			{
			}

			public int Compare( Mobile x, Mobile y )
			{
				if ( x == null || y == null )
					throw new ArgumentException();

				if ( x.AccessLevel > y.AccessLevel )
					return -1;
				else if ( x.AccessLevel < y.AccessLevel )
					return 1;
				else
					return Insensitive.Compare( x.Name, y.Name );
			}
		}

		public WhoGump( Mobile owner, string filter ) : this( owner, BuildList( owner, filter ), 0 )
		{
		}

		public WhoGump( Mobile owner, List<Mobile> list, int page ) : base( GumpOffsetX, GumpOffsetY )
		{
			owner.CloseGump( typeof( WhoGump ) );

			m_Owner = owner;
			m_Mobiles = list;

			Initialize( page );
		}

		public static List<Mobile> BuildList( Mobile owner, string filter )
		{
			if ( filter != null && (filter = filter.Trim()).Length == 0 )
				filter = null;
			else
				filter = filter.ToLower();

			List<Mobile> list = new List<Mobile>();
			List<NetState> states = NetState.Instances;

			for ( int i = 0; i < states.Count; ++i )
			{
				Mobile m = states[i].Mobile;

				if ( m != null && (m == owner || !m.Hidden || owner.AccessLevel >= m.AccessLevel || (m is PlayerMobile && ((PlayerMobile)m).VisibilityList.Contains( owner ) ) ) )
				{
					if ( filter != null && ( m.Name == null || m.Name.ToLower().IndexOf( filter ) < 0 ) )
						continue;

					list.Add( m );
				}
			}

			list.Sort( InternalComparer.Instance );

			return list;
		}

		public void Initialize( int page )
		{
			m_Page = page;

			int count = m_Mobiles.Count - (page * EntryCount);

			if ( count < 0 )
				count = 0;
			else if ( count > EntryCount )
				count = EntryCount;

			int totalHeight = OffsetSize + ((EntryHeight + OffsetSize) * (count + 1));

			AddPage( 0 );

			AddBackground( 0, 0, BackWidth, BorderSize + totalHeight + BorderSize, BackGumpID );
			AddImageTiled( BorderSize, BorderSize, TotalWidth - (OldStyle ? SetWidth + OffsetSize : 0), totalHeight, OffsetGumpID );

			int x = BorderSize + OffsetSize;
			int y = BorderSize + OffsetSize;

			int emptyWidth = TotalWidth - PrevWidth - NextWidth - (OffsetSize * 4) - (OldStyle ? SetWidth + OffsetSize : 0);

			if ( !OldStyle )
				AddImageTiled( x - (OldStyle ? OffsetSize : 0), y, emptyWidth + (OldStyle ? OffsetSize * 2 : 0), EntryHeight, EntryGumpID );

			AddLabel( x + TextOffsetX, y, TextHue, String.Format( "Page {0} of {1} ({2})", page+1, (m_Mobiles.Count + EntryCount - 1) / EntryCount, m_Mobiles.Count ) );

			x += emptyWidth + OffsetSize;

			if ( OldStyle )
				AddImageTiled( x, y, TotalWidth - (OffsetSize * 3) - SetWidth, EntryHeight, HeaderGumpID );
			else
				AddImageTiled( x, y, PrevWidth, EntryHeight, HeaderGumpID );

			if ( page > 0 )
			{
				AddButton( x + PrevOffsetX, y + PrevOffsetY, PrevButtonID1, PrevButtonID2, 1, GumpButtonType.Reply, 0 );

				if ( PrevLabel )
					AddLabel( x + PrevLabelOffsetX, y + PrevLabelOffsetY, TextHue, "Previous" );
			}

			x += PrevWidth + OffsetSize;

			if ( !OldStyle )
				AddImageTiled( x, y, NextWidth, EntryHeight, HeaderGumpID );

			if ( (page + 1) * EntryCount < m_Mobiles.Count )
			{
				AddButton( x + NextOffsetX, y + NextOffsetY, NextButtonID1, NextButtonID2, 2, GumpButtonType.Reply, 1 );

				if ( NextLabel )
					AddLabel( x + NextLabelOffsetX, y + NextLabelOffsetY, TextHue, "Next" );
			}

			for ( int i = 0, index = page * EntryCount; i < EntryCount && index < m_Mobiles.Count; ++i, ++index )
			{
				x = BorderSize + OffsetSize;
				y += EntryHeight + OffsetSize;

				Mobile m = m_Mobiles[index];

				AddImageTiled( x, y, EntryWidth, EntryHeight, EntryGumpID );
				AddLabelCropped( x + TextOffsetX, y, EntryWidth - TextOffsetX, EntryHeight, GetHueFor( m ), m.Deleted ? "(deleted)" : m.Name );

				x += EntryWidth + OffsetSize;

				if ( SetGumpID != 0 )
					AddImageTiled( x, y, SetWidth, EntryHeight, SetGumpID );

				if ( m.NetState != null && !m.Deleted )
					AddButton( x + SetOffsetX, y + SetOffsetY, SetButtonID1, SetButtonID2, i + 3, GumpButtonType.Reply, 0 );
			}
		}

		private static int GetHueFor( Mobile m )
		{
			switch ( m.AccessLevel )
			{
				case AccessLevel.Owner:
				case AccessLevel.Developer:
				case AccessLevel.Administrator: return 0x516;
				case AccessLevel.Seer: return 0x144;
				case AccessLevel.GameMaster: return 0x21;
				case AccessLevel.Counselor: return 0x2;
				case AccessLevel.Player: default:
				{
					if ( m.Kills >= 5 )
						return 0x21;
					else if ( m.Criminal )
						return 0x3B1;

					return 0x58;
				}
			}
		}

		public override void OnResponse( NetState state, RelayInfo info )
		{
			Mobile from = state.Mobile;

			switch ( info.ButtonID )
			{
				case 0: // Closed
				{
					return;
				}
				case 1: // Previous
				{
					if ( m_Page > 0 )
						from.SendGump( new WhoGump( from, m_Mobiles, m_Page - 1 ) );

					break;
				}
				case 2: // Next
				{
					if ( (m_Page + 1) * EntryCount < m_Mobiles.Count )
						from.SendGump( new WhoGump( from, m_Mobiles, m_Page + 1 ) );

					break;
				}
				default:
				{
					int index = (m_Page * EntryCount) + (info.ButtonID - 3);

					if ( index >= 0 && index < m_Mobiles.Count )
					{
						Mobile m = m_Mobiles[index];

						if ( m.Deleted )
						{
							from.SendMessage( "That player has deleted their character." );
							from.SendGump( new WhoGump( from, m_Mobiles, m_Page ) );
						}
						else if ( m.NetState == null )
						{
							from.SendMessage( "That player is no longer online." );
							from.SendGump( new WhoGump( from, m_Mobiles, m_Page ) );
						}
						else if ( m == from || !m.Hidden || from.AccessLevel >= m.AccessLevel || (m is PlayerMobile && ((PlayerMobile)m).VisibilityList.Contains( from ))) 
						{
							from.SendGump( new ClientGump( from, m.NetState ) );
						}
						else
						{
							from.SendMessage( "You cannot see them." );
							from.SendGump( new WhoGump( from, m_Mobiles, m_Page ) );
						}
					}

					break;
				}
			}
		}
	}
}