using System;

namespace Server.Items
{
	public class TransientItem : Item
	{
		private TimeSpan m_LifeSpan;

		[CommandProperty( AccessLevel.GameMaster )]
		public TimeSpan LifeSpan
		{
			get => m_LifeSpan;
			set => m_LifeSpan = value;
		}

		private DateTime m_CreationTime;

		[CommandProperty( AccessLevel.GameMaster )]
		public DateTime CreationTime
		{
			get => m_CreationTime;
			set => m_CreationTime = value;
		}

		private Timer m_Timer;

		public override bool Nontransferable => true;
		public override void HandleInvalidTransfer( Mobile from )
		{
			if ( InvalidTransferMessage != null )
				TextDefinition.SendMessageTo( from, InvalidTransferMessage );

			Delete();
		}

		public virtual TextDefinition InvalidTransferMessage  => null;


		public virtual void Expire( Mobile parent )
		{
			if ( parent != null )
				parent.SendLocalizedMessage( 1072515, (Name == null ? $"#{LabelNumber}" : Name) ); // The ~1_name~ expired...

			Effects.PlaySound( GetWorldLocation(), Map, 0x201 );

			Delete();
		}

		public virtual void SendTimeRemainingMessage( Mobile to )
		{
			to.SendLocalizedMessage( 1072516,
				$"{(Name == null ? $"#{LabelNumber}" : Name)}\t{(int) m_LifeSpan.TotalSeconds}"); // ~1_name~ will expire in ~2_val~ seconds!
		}

		public override void OnDelete()
		{
			m_Timer?.Stop();

			base.OnDelete();
		}

		public virtual void CheckExpiry()
		{
			if ( (m_CreationTime + m_LifeSpan) < DateTime.UtcNow )
				Expire( RootParent as Mobile );
			else
				InvalidateProperties();
		}

		[Constructible]
		public TransientItem( int itemID, TimeSpan lifeSpan )
			: base( itemID )
		{
			m_CreationTime = DateTime.UtcNow;
			m_LifeSpan = lifeSpan;

			m_Timer = Timer.DelayCall( TimeSpan.FromSeconds( 5 ), TimeSpan.FromSeconds( 5 ), new TimerCallback( CheckExpiry ) );
		}

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

		public override void GetProperties( ObjectPropertyList list )
		{
			base.GetProperties( list );

			TimeSpan remaining = ((m_CreationTime + m_LifeSpan) - DateTime.UtcNow);

			list.Add( 1072517, ((int)remaining.TotalSeconds).ToString() ); // Lifespan: ~1_val~ seconds
		}

		public override void Serialize( GenericWriter writer )
		{
			base.Serialize( writer );
			writer.Write( (int)0 );

			writer.Write( m_LifeSpan );
			writer.Write( m_CreationTime );
		}

		public override void Deserialize( GenericReader reader )
		{
			base.Deserialize( reader );
			int version = reader.ReadInt();

			m_LifeSpan = reader.ReadTimeSpan();
			m_CreationTime = reader.ReadDateTime();

			m_Timer = Timer.DelayCall( TimeSpan.FromSeconds( 5 ), TimeSpan.FromSeconds( 5 ), new TimerCallback( CheckExpiry ) );
		}
	}
}