using System;
using Server.Gumps;
using Server.Network;

namespace Server.Items
{
	public abstract class SpecialScroll : Item
	{
		private SkillName m_Skill;
		private double m_Value;

		#region Old Item Serialization Vars
		/* DO NOT USE! Only used in serialization of special scrolls that originally derived from Item */
		private bool m_InheritsItem;

		protected bool InheritsItem => m_InheritsItem;

		#endregion

		public abstract int Message{ get; }
		public virtual int Title => 0;
		public abstract string DefaultTitle{ get; }

		public SpecialScroll( SkillName skill, double value ) : base( 0x14F0 )
		{
			LootType = LootType.Cursed;
			Weight = 1.0;

			m_Skill = skill;
			m_Value = value;
		}

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

		[CommandProperty( AccessLevel.GameMaster )]
		public SkillName Skill
		{
			get => m_Skill;
			set => m_Skill = value;
		}

		[CommandProperty( AccessLevel.GameMaster )]
		public double Value
		{
			get => m_Value;
			set => m_Value = value;
		}

		public virtual string GetNameLocalized()
		{
			return string.Concat( "#", AosSkillBonuses.GetLabel( m_Skill ).ToString() );
		}

		public virtual string GetName()
		{
			int index = (int)m_Skill;
			SkillInfo[] table = SkillInfo.Table;

			if ( index >= 0 && index < table.Length )
				return table[index].Name.ToLower();
			else
				return "???";
		}

		public virtual bool CanUse( Mobile from )
		{
			if ( Deleted )
				return false;

			if ( !IsChildOf( from.Backpack ) )
			{
				from.SendLocalizedMessage(1042001); // That must be in your pack for you to use it.
				return false;
			}

			return true;
		}

		public virtual void Use( Mobile from )
		{
		}

		public override void OnDoubleClick( Mobile from )
		{
			if ( !CanUse( from ) )
				return;

			from.CloseGump( typeof( InternalGump ) );
			from.SendGump( new InternalGump( from, this ) );
		}

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

			writer.Write( (int) 1 ); // version

			writer.Write( (int) m_Skill );
			writer.Write( (double) m_Value );
		}

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

			int version = reader.ReadInt();

			switch ( version )
			{
				case 1:
				{
					m_Skill = (SkillName)reader.ReadInt();
					m_Value = reader.ReadDouble();
					break;
				}
				case 0:
				{
					m_InheritsItem = true;

					if ( !(this is StatCapScroll) )
						m_Skill = (SkillName)reader.ReadInt();
					else
						m_Skill = SkillName.Alchemy;

					if ( this is ScrollofAlacrity )
						m_Value = 0.0;
					else if ( this is StatCapScroll )
						m_Value = (double)reader.ReadInt();
					else
						m_Value = reader.ReadDouble();

					break;
				}
			}
		}

		public class InternalGump : Gump
		{
			private Mobile m_Mobile;
			private SpecialScroll m_Scroll;

			public InternalGump( Mobile mobile, SpecialScroll scroll ) : base( 25, 50 )
			{
				m_Mobile = mobile;
				m_Scroll = scroll;

				AddPage( 0 );

				AddBackground( 25, 10, 420, 200, 5054 );

				AddImageTiled( 33, 20, 401, 181, 2624 );
				AddAlphaRegion( 33, 20, 401, 181 );

				AddHtmlLocalized( 40, 48, 387, 100, m_Scroll.Message, true, true );

				AddHtmlLocalized( 125, 148, 200, 20, 1049478, 0xFFFFFF, false, false ); // Do you wish to use this scroll?

				AddButton( 100, 172, 4005, 4007, 1, GumpButtonType.Reply, 0 );
				AddHtmlLocalized( 135, 172, 120, 20, 1046362, 0xFFFFFF, false, false ); // Yes

				AddButton( 275, 172, 4005, 4007, 0, GumpButtonType.Reply, 0 );
				AddHtmlLocalized( 310, 172, 120, 20, 1046363, 0xFFFFFF, false, false ); // No

				if ( m_Scroll.Title != 0 )
					AddHtmlLocalized( 40, 20, 260, 20, m_Scroll.Title, 0xFFFFFF, false, false );
				else
					AddHtml( 40, 20, 260, 20, m_Scroll.DefaultTitle, false, false );

				if ( m_Scroll is StatCapScroll )
					AddHtmlLocalized( 310, 20, 120, 20, 1038019, 0xFFFFFF, false, false ); // Power
				else
					AddHtmlLocalized( 310, 20, 120, 20, AosSkillBonuses.GetLabel( m_Scroll.Skill ), 0xFFFFFF, false, false );
			}

			public override void OnResponse( NetState state, RelayInfo info )
			{
				if ( info.ButtonID == 1 )
					m_Scroll.Use( m_Mobile );
			}
		}
	}
}