using System;
using Server.Spells;
using Server.Items;

namespace Server.Mobiles
{
	public class Changeling : BaseCreature
	{
		public override string CorpseName => "a changeling corpse";
		public override string DefaultName => "a changeling";
		public virtual int DefaultHue => 0;

		[Constructible]
		public Changeling()
			: base( AIType.AI_Mage, FightMode.Closest, 10, 1, 0.2, 0.4 )
		{
			Body = 264;
			Hue = DefaultHue;

			SetStr( 36, 105 );
			SetDex( 212, 262 );
			SetInt( 317, 399 );

			SetHits( 201, 211 );
			SetStam( 212, 262 );
			SetMana( 317, 399 );

			SetDamage( 9, 15 );

			SetDamageType( ResistanceType.Physical, 100 );

			SetResistance( ResistanceType.Physical, 81, 90 );
			SetResistance( ResistanceType.Fire, 40, 50 );
			SetResistance( ResistanceType.Cold, 40, 49 );
			SetResistance( ResistanceType.Poison, 40, 50 );
			SetResistance( ResistanceType.Energy, 43, 50 );

			SetSkill( SkillName.Wrestling, 10.4, 12.5 );
			SetSkill( SkillName.Tactics, 101.1, 108.3 );
			SetSkill( SkillName.MagicResist, 121.6, 132.2 );
			SetSkill( SkillName.Magery, 91.6, 99.5 );
			SetSkill( SkillName.EvalInt, 91.5, 98.8 );
			SetSkill( SkillName.Meditation, 91.7, 98.5 );

			Fame = 15000;
			Karma = -15000;

			PackScroll( 1, 7 );
			PackItem( new Arrow( 35 ) );
			PackItem( new Bolt( 25 ) );
			PackGem( 2 );

			PackArcaneScroll( 0, 1 );
		}

		public override bool ShowFameTitle => false;
		public override bool InitialInnocent => m_MorphedInto != null;

		public override void GenerateLoot()
		{
			AddLoot( LootPack.AosRich, 3 );
		}

		public override int GetAngerSound() { return 0x46E; }
		public override int GetIdleSound() { return 0x470; }
		public override int GetAttackSound() { return 0x46D; }
		public override int GetHurtSound() { return 0x471; }
		public override int GetDeathSound() { return 0x46F; }

		private Mobile m_MorphedInto;
		private DateTime m_LastMorph;
		private DateTime m_NextFireRing;

		[CommandProperty( AccessLevel.GameMaster )]
		public Mobile MorphedInto
		{
			get => m_MorphedInto;
			set
			{
				if ( value == this )
					value = null;

				if ( m_MorphedInto != value )
				{
					Revert();

					if ( value != null )
					{
						Morph( value );
						m_LastMorph = DateTime.UtcNow;
					}

					m_MorphedInto = value;
					Delta( MobileDelta.Noto );
				}
			}
		}

		public override void OnThink()
		{
			base.OnThink();

			if ( Combatant != null )
			{
				if ( m_NextFireRing <= DateTime.UtcNow && Utility.RandomDouble() < 0.02 )
				{
					FireRing();
					m_NextFireRing = DateTime.UtcNow + TimeSpan.FromMinutes( 2 );
				}

				if ( Combatant.Player && m_MorphedInto != Combatant && Utility.RandomDouble() < 0.05 )
					MorphedInto = Combatant;
			}
		}

		public override bool CheckIdle()
		{
			bool idle = base.CheckIdle();

			if ( idle && m_MorphedInto != null && DateTime.UtcNow - m_LastMorph > TimeSpan.FromSeconds( 30 ) )
				MorphedInto = null;

			return idle;
		}

		private void FireEffects( int itemID, int[] offsets )
		{
			for ( int i = 0; i < offsets.Length; i += 2 )
			{
				Point3D p = Location;

				p.X += offsets[i];
				p.Y += offsets[i + 1];

				if ( SpellHelper.AdjustField( ref p, Map, 12, false ) )
					Effects.SendLocationEffect( p, Map, itemID, 50 );
			}
		}

		private static readonly int[] m_FireNorth =
		{
			-1, -1,
			1, -1,
			-1, 2,
			1, 2
		};

		private static readonly int[] m_FireEast =
		{
			-1, 0,
			2, 0
		};

		protected virtual void FireRing()
		{
			FireEffects( 0x3E27, m_FireNorth );
			FireEffects( 0x3E31, m_FireEast );
		}

		protected virtual void Morph( Mobile m )
		{
			Body = m.Body;
			Hue = m.Hue;
			Female = m.Female;
			Name = m.Name;
			NameHue = m.NameHue;
			Title = m.Title;
			Kills = m.Kills;
			HairItemID = m.HairItemID;
			HairHue = m.HairHue;
			FacialHairItemID = m.FacialHairItemID;
			FacialHairHue = m.FacialHairHue;

			// TODO: Skills?

			foreach ( Item item in m.Items )
			{
				if ( item.Layer != Layer.Backpack && item.Layer != Layer.Mount && item.Layer != Layer.Bank )
					AddItem( new ClonedItem( item ) ); // TODO: Clone weapon/armor attributes
			}

			PlaySound( 0x511 );
			FixedParticles( 0x376A, 1, 14, 5045, EffectLayer.Waist );
		}

		protected virtual void Revert()
		{
			Body = 264;
			Hue = ( IsParagon && DefaultHue == 0 ) ? Paragon.Hue : DefaultHue;
			Female = false;
			Name = null;
			NameHue = -1;
			Title = null;
			Kills = 0;
			HairItemID = 0;
			HairHue = 0;
			FacialHairItemID = 0;
			FacialHairHue = 0;

			DeleteClonedItems();

			PlaySound( 0x511 );
			FixedParticles( 0x376A, 1, 14, 5045, EffectLayer.Waist );
		}

		public void DeleteClonedItems()
		{
			for ( int i = Items.Count - 1; i >= 0; --i )
			{
				Item item = Items[i];

				if ( item is ClonedItem )
					item.Delete();
			}

			if ( Backpack != null )
			{
				for ( int i = Backpack.Items.Count - 1; i >= 0; --i )
				{
					Item item = Backpack.Items[i];

					if ( item is ClonedItem )
						item.Delete();
				}
			}
		}

		public override void OnAfterDelete()
		{
			DeleteClonedItems();

			base.OnAfterDelete();
		}

		public override void ClearHands()
		{
		}

		public Changeling( Serial serial )
			: base( serial )
		{
		}

		public override void Serialize( GenericWriter writer )
		{
			base.Serialize( writer );

			writer.Write( (int) 0 ); // version
			writer.Write( ( m_MorphedInto != null ) );
		}

		public override void Deserialize( GenericReader reader )
		{
			base.Deserialize( reader );

			int version = reader.ReadInt();

			if ( reader.ReadBool() )
				ValidationQueue<Changeling>.Add( this );
		}

		public void Validate()
		{
			Revert();
		}

		private class ClonedItem : Item
		{
			public ClonedItem( Item item )
				: base( item.ItemID )
			{
				Name = item.Name;
				Weight = item.Weight;
				Hue = item.Hue;
				Layer = item.Layer;
				Movable = false;
			}

			public ClonedItem( Serial serial )
				: base( serial )
			{
			}

			public override void Serialize( GenericWriter writer )
			{
				base.Serialize( writer );

				writer.Write( (int) 0 ); // version
			}

			public override void Deserialize( GenericReader reader )
			{
				base.Deserialize( reader );

				int version = reader.ReadInt();
			}
		}
	}
}