context: using System;
  using Server.Targeting;
  using Server.Items;
  using Server.Network;
  using Server.Misc;
  using Server.Mobiles;
  
  namespace Server.Spells.Sixth
  {
  	public class ParalyzeFieldSpell : MagerySpell
  	{
  		private static SpellInfo m_Info = new SpellInfo(
  				"Paralyze Field", "In Ex Grav",
  				230,
  				9012,
  				false,
  				Reagent.BlackPearl,
  				Reagent.Ginseng,
  				Reagent.SpidersSilk
  			);
  
  		public override SpellCircle Circle { get { return SpellCircle.Sixth; } }
  
  		public ParalyzeFieldSpell( Mobile caster, Item scroll ) : base( caster, scroll, m_Info )
  		{
  		}
  
  		public override void OnCast()
  		{
  			Caster.Target = new InternalTarget( this );
  		}
  
  		public void Target( IPoint3D p )
  		{
  			if ( !Caster.CanSee( p ) )
  			{
  				Caster.SendLocalizedMessage( 500237 ); // Target can not be seen.
  			}
  			else if ( SpellHelper.CheckTown( p, Caster ) && CheckSequence() )
  			{
  				SpellHelper.Turn( Caster, p );
  
  				SpellHelper.GetSurfaceTop( ref p );
  
  				int dx = Caster.Location.X - p.X;
  				int dy = Caster.Location.Y - p.Y;
  				int rx = (dx - dy) * 44;
  				int ry = (dx + dy) * 44;
  
  				bool eastToWest;
  
  				if ( rx >= 0 && ry >= 0 )
  					eastToWest = false;
  				else if ( rx >= 0 )
  					eastToWest = true;
  				else if ( ry >= 0 )
  					eastToWest = true;
  				else
  					eastToWest = false;
  
  				Effects.PlaySound( p, Caster.Map, 0x20B );
  
  				int itemID = eastToWest ? 0x3967 : 0x3979;
  
  				TimeSpan duration = TimeSpan.FromSeconds( 3.0 + (Caster.Skills[SkillName.Magery].Value / 3.0) );
  
  				for ( int i = -2; i <= 2; ++i )
  				{
  					Point3D loc = new Point3D( eastToWest ? p.X + i : p.X, eastToWest ? p.Y : p.Y + i, p.Z );
  					bool canFit = SpellHelper.AdjustField( ref loc, Caster.Map, 12, false );
  
  					if ( !canFit )
  						continue;
  
  					Item item = new InternalItem( Caster, itemID, loc, Caster.Map, duration );
  					item.ProcessDelta();
  
  					Effects.SendLocationParticles( EffectItem.Create( loc, Caster.Map, EffectItem.DefaultDuration ), 0x376A, 9, 10, 5048 );
  				}
  			}
  
  			FinishSequence();
  		}
  
  		[DispellableField]
  		public class InternalItem : Item
  		{
  			private Timer m_Timer;
  			private Mobile m_Caster;
  			private DateTime m_End;
  
  			public override bool BlocksFit{ get{ return true; } }
  
  			public InternalItem( Mobile caster, int itemID, Point3D loc, Map map, TimeSpan duration ) : base( itemID )
  			{
  				Visible = false;
  				Movable = false;
  				Light = LightType.Circle300;
  
  				MoveToWorld( loc, map );
  
  				if ( caster.InLOS( this ) )
  					Visible = true;
  				else
  					Delete();
  
  				if ( Deleted )
  					return;
  
  				m_Caster = caster;
  
  				m_Timer = new InternalTimer( this, duration );
  				m_Timer.Start();
  
  				m_End = DateTime.Now + duration;
  			}
  
  			public override void OnAfterDelete()
  			{
  				base.OnAfterDelete();
  
  				if ( m_Timer != null )
  					m_Timer.Stop();
  			}
  
  			public InternalItem( Serial serial ) : base( serial )
  			{
  			}
  
  			public override void Serialize( GenericWriter writer )
  			{
  				base.Serialize( writer );
  
  				writer.Write( (int) 0 ); // version
  
  				writer.Write( m_Caster );
  				writer.WriteDeltaTime( m_End );
  			}
  
  			public override void Deserialize( GenericReader reader )
  			{
  				base.Deserialize( reader );
  
  				int version = reader.ReadInt();
  
  				switch ( version )
  				{
  					case 0:
  					{
  						m_Caster = reader.ReadMobile();
  						m_End = reader.ReadDeltaTime();
  
  						m_Timer = new InternalTimer( this, m_End - DateTime.Now );
  						m_Timer.Start();
  
  						break;
  					}
  				}
  			}
  
  			public override bool OnMoveOver( Mobile m )
  			{
  				if ( Visible && m_Caster != null && (!Core.AOS || m != m_Caster) && SpellHelper.ValidIndirectTarget( m_Caster, m ) && m_Caster.CanBeHarmful( m, false ) )
  				{
  					if ( SpellHelper.CanRevealCaster( m ) )
  						m_Caster.RevealingAction();
  
  					m_Caster.DoHarmful( m );
  
  					double duration;
  
  					if ( Core.AOS )
  					{
  						duration = 2.0 + ((int)(m_Caster.Skills[SkillName.EvalInt].Value / 10) - (int)(m.Skills[SkillName.MagicResist].Value / 10));
  
  						if ( !m.Player )
  							duration *= 3.0;
  
  						if ( duration < 0.0 )
  							duration = 0.0;
  					}
  					else
  					{
  						duration = 7.0 + (m_Caster.Skills[SkillName.Magery].Value * 0.2);
  					}
  
  					m.Paralyze( TimeSpan.FromSeconds( duration ) );
  
  					m.PlaySound( 0x204 );
  					m.FixedEffect( 0x376A, 10, 16 );
  					
  					if ( m is BaseCreature )
  						((BaseCreature) m).OnHarmfulSpell( m_Caster );
  				}
  
  				return true;
  			}
  
  			private class InternalTimer : Timer
  			{
  				private Item m_Item;
  
  				public InternalTimer( Item item, TimeSpan duration ) : base( duration )
  				{
  					Priority = TimerPriority.OneSecond;
  					m_Item = item;
  				}
  
  				protected override void OnTick()
  				{
  					m_Item.Delete();
  				}
  			}
  		}
  
  		private class InternalTarget : Target
  		{
  			private ParalyzeFieldSpell m_Owner;
  
  			public InternalTarget( ParalyzeFieldSpell owner ) : base( Core.ML ? 10 : 12, true, TargetFlags.None )
  			{
  				m_Owner = owner;
  			}
  
  			protected override void OnTarget( Mobile from, object o )
  			{
  				if ( o is IPoint3D )
  
gt: 					m_Owner.Target( (IPoint3D)o );