using System;
using System.Collections;
using Server.Network;
using Server.Items;
using Server.Mobiles;
using Server.Targeting;

namespace Server.Spells.Ninjitsu
{
	public class KiAttack : NinjaMove
	{
		public KiAttack()
		{
		}

		public override int BaseMana{ get{ return 25; } }
		public override double RequiredSkill{ get{ return 80.0; } }

		public override TextDefinition AbilityMessage{ get{ return new TextDefinition( 1063099 ); } } // Your Ki Attack must be complete within 2 seconds for the damage bonus!

		public override void OnUse( Mobile from )
		{
			if ( !Validate( from ) )
				return;

			KiAttackInfo info = new KiAttackInfo( from );
			info.m_Timer = Timer.DelayCall( TimeSpan.FromSeconds( 2.0 ), new TimerStateCallback( EndKiAttack ), info );

			m_Table[from] = info;
		}

		public override bool Validate( Mobile from )
		{
			if ( from.Hidden && from.AllowedStealthSteps > 0 )
			{
				from.SendLocalizedMessage( 1063127 ); // You cannot use this ability while in stealth mode.
				return false;
			}

			return base.Validate( from );
		}

		public override double GetDamageScalar( Mobile attacker, Mobile defender )
		{
			if ( attacker.Hidden )
				return 1.0;

			return 1.0 + GetBonus( attacker ) / 10;
		}

		public override void OnHit( Mobile attacker, Mobile defender, int damage )
		{
			if ( !Validate( attacker ) || !CheckMana( attacker, true ) )
				return;

			if ( GetBonus( attacker ) == 0.0 )
			{
				attacker.SendLocalizedMessage( 1063101 ); // You were too close to your target to cause any additional damage.
			}
			else
			{
				attacker.SendLocalizedMessage( 1063100 ); // Your quick flight to your target causes extra damage as you strike!
				defender.FixedParticles( 0x37BE, 1, 5, 0x26BD, 0, 0x1, EffectLayer.Waist );
			}

			ClearCurrentMove( attacker );
		}

		public override void OnClearMove( Mobile from )
		{
			KiAttackInfo info = m_Table[from] as KiAttackInfo;

			if ( info != null )
			{
				if ( info.m_Timer != null )
					info.m_Timer.Stop();

				m_Table.Remove( info.m_Mobile );
			}
		}

		private static Hashtable m_Table = new Hashtable();

		public static double GetBonus( Mobile from )
		{
			KiAttackInfo info = m_Table[from] as KiAttackInfo;

			if ( info == null )
				return 0.0;

			int xDelta = info.m_Location.X - from.X;
			int yDelta = info.m_Location.Y - from.Y;

			double bonus = Math.Sqrt( (xDelta * xDelta) + (yDelta * yDelta) );

			if ( bonus > 20.0 )
				bonus = 20.0;

			return bonus;
		}

		private class KiAttackInfo
		{
			public Mobile m_Mobile;
			public Point3D m_Location;
			public Timer m_Timer;

			public KiAttackInfo( Mobile m )
			{
				m_Mobile = m;
				m_Location = m.Location;
			}
		}

		private static void EndKiAttack( object state )
		{
			KiAttackInfo info = (KiAttackInfo)state;

			if ( info.m_Timer != null )
				info.m_Timer.Stop();

			ClearCurrentMove( info.m_Mobile );
			info.m_Mobile.SendLocalizedMessage( 1063102 ); // You failed to complete your Ki Attack in time.

			m_Table.Remove( info.m_Mobile );
		}
	}
}