using System;
using System.Collections.Generic;
using Server.Misc;
using Server.Mobiles;
using Server.Targeting;

namespace Server.Spells.Sixth
{
	public class ParalyzeFieldSpell : Spell
	{
		public override bool CanTargetGround { get { return true; } }

		private static SpellInfo m_Info = new SpellInfo(
				"Paralyze Field", "In Ex Grav",
				SpellCircle.Sixth,
				263,
				9012,
				Reagent.BlackPearl,
				Reagent.Ginseng,
				Reagent.SpidersSilk
			);

		public ParalyzeFieldSpell( Mobile caster, Item scroll ) : base( caster, scroll, m_Info )
		{
		}

		public override void OnCast()
		{
			if(Caster is PlayerMobile)
				this.Target( (IPoint3D)SphereSpellTarget );
			else
				Caster.Target = new InternalTarget( this );
		}

		public void Target( IPoint3D p )
		{
/*			if ( !Caster.CanSee( p ) )
			{
				Caster.SendLocalizedMessage( 500237 ); // Target can not be seen.
			}
			else*/
			if ( CheckSequence() )
			{
				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, 529 );

				int itemID = eastToWest ? 0x3967 : 0x3979;

				TimeSpan duration = TimeSpan.FromSeconds( 3.0 + (Caster.Skills[SkillName.Magery].Value / 3.0) );

				List<Item> itemList = new List<Item>();
				for ( int i = -3; i <= 3; ++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 );
				    itemList.Add(item);
					item.ProcessDelta();
				}

				if( itemList.Count > 0 )
					new SoundTimer( itemList, 529 ).Start();

				Mobile mob = SphereSpellTarget as Mobile;

				if (mob != null)
				{
					InternalItem castItem = new InternalItem( Caster, itemID, mob.Location, Caster.Map, duration );
					castItem.OnMoveOver( mob );
					Caster.DoHarmful( mob );

					castItem.Delete();
				}
			}

			FinishSequence();
		}

		private class SoundTimer : Timer
		{
			private List<Item> m_ItemList;
			private int m_SoundId;

			public SoundTimer( List<Item> itemList, int soundId ) : base( TimeSpan.FromSeconds( 2.0 ) )
			{
				Priority = TimerPriority.OneSecond;
				m_SoundId = soundId;

				m_ItemList = itemList;
			}

			protected override void OnTick()
			{
				if( m_ItemList.Count > 0 )
				{
					Item playFrom;

					do
					{
						if( m_ItemList.Count > 1 )
							playFrom = m_ItemList[Utility.Random( m_ItemList.Count )];
						else
							playFrom = m_ItemList[0];

						if( playFrom.Deleted )
							m_ItemList.Remove( playFrom );
					}
					while( m_ItemList.Count > 0 && playFrom.Deleted );

					if( !playFrom.Deleted )
					{
						bool playSound = false;
						foreach( Item i in m_ItemList )
						{
							IPooledEnumerable ipe = i.GetMobilesInRange( 0 );
							foreach( Mobile m in ipe )
							{
								i.OnMoveOver( m );
								if( !playSound )
									playSound = true;
							}

							ipe.Free();
						}

						if( playSound )
						{
							IPooledEnumerable ipe = playFrom.GetMobilesInRange( 12 );
							foreach( Mobile m in ipe )
								m.PlaySound( m_SoundId );

							ipe.Free();
						}

						new SoundTimer( m_ItemList, m_SoundId ).Start();
					}
				}
			}
		}

		[DispellableField]
		private 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 );

				Visible = true;

				m_Caster = caster;

				int timespan = Utility.Random( 23, 70 );

				m_Timer = new InternalTimer( this, TimeSpan.FromSeconds( timespan) );
				m_Timer.Start();

				m_End = DateTime.Now + TimeSpan.FromSeconds( timespan );
			}

			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 && SpellHelper.ValidIndirectTarget( m_Caster, m ) && m_Caster.CanBeHarmful( m, false ) )
				{
					double duration;

					if ( Core.AOS )
					{
						duration = (m_Caster.Skills[SkillName.EvalInt].Value - m.Skills[SkillName.MagicResist].Value) * 0.3;

						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.FixedParticles( 0x374A, 10, 15, 5028, EffectLayer.Waist );
				}

				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( 12, true, TargetFlags.None )
			{
				m_Owner = owner;
			}

			protected override void OnTarget( Mobile from, object o )
			{
				if ( o is IPoint3D )
					m_Owner.Target( (IPoint3D)o );
			}

			protected override void OnTargetFinish( Mobile from )
			{
				m_Owner.FinishSequence();
			}
		}
	}
}