using System;
using System.Collections.Generic;
using Server.Multis;

namespace Server.Mobiles
{
	public class VendorInventory
	{
		public static readonly TimeSpan GracePeriod = TimeSpan.FromDays( 7.0 );

		private Timer m_ExpireTimer;

		public VendorInventory( BaseHouse house, Mobile owner, string vendorName, string shopName )
		{
			House = house;
			Owner = owner;
			VendorName = vendorName;
			ShopName = shopName;

			Items = new List<Item>();

			ExpireTime = DateTime.UtcNow + GracePeriod;
			m_ExpireTimer = new ExpireTimer( this, GracePeriod );
			m_ExpireTimer.Start();
		}

		public BaseHouse House { get; set; }

		public string VendorName { get; set; }

		public string ShopName { get; set; }

		public Mobile Owner { get; set; }

		public List<Item> Items { get; }

		public int Gold { get; set; }

		public DateTime ExpireTime { get; }

		public void AddItem( Item item )
		{
			item.Internalize();
			Items.Add( item );
		}

		public void Delete()
		{
			foreach ( Item item in Items )
			{
				item.Delete();
			}

			Items.Clear();
			Gold = 0;

			House?.VendorInventories.Remove( this );

			m_ExpireTimer.Stop();
		}

		public void Serialize( GenericWriter writer )
		{
			writer.WriteEncodedInt( 0 ); // version

			writer.Write( (Mobile) Owner );
			writer.Write( (string) VendorName );
			writer.Write( (string) ShopName );

			writer.Write( Items, true );
			writer.Write( (int) Gold );

			writer.WriteDeltaTime( ExpireTime );
		}

		public VendorInventory( BaseHouse house, GenericReader reader )
		{
			House = house;

			int version = reader.ReadEncodedInt();

			Owner = reader.ReadMobile();
			VendorName = reader.ReadString();
			ShopName = reader.ReadString();

			Items = reader.ReadStrongItemList();
			Gold = reader.ReadInt();

			ExpireTime = reader.ReadDeltaTime();

			if ( Items.Count == 0 && Gold == 0 )
			{
				Timer.DelayCall( TimeSpan.Zero, Delete );
			}
			else
			{
				TimeSpan delay = ExpireTime - DateTime.UtcNow;
				m_ExpireTimer = new ExpireTimer( this, delay > TimeSpan.Zero ? delay : TimeSpan.Zero );
				m_ExpireTimer.Start();
			}
		}

		private class ExpireTimer : Timer
		{
			private VendorInventory m_Inventory;

			public ExpireTimer( VendorInventory inventory, TimeSpan delay ) : base( delay )
			{
				m_Inventory = inventory;

				Priority = TimerPriority.OneMinute;
			}

			protected override void OnTick()
			{
				BaseHouse house = m_Inventory.House;

				if ( house != null )
				{
					if ( m_Inventory.Gold > 0 )
					{
						if ( house.MovingCrate == null )
							house.MovingCrate = new MovingCrate( house );

						Banker.Deposit( house.MovingCrate, m_Inventory.Gold );
					}

					foreach ( Item item in m_Inventory.Items )
					{
						if ( !item.Deleted )
							house.DropToMovingCrate( item );
					}

					m_Inventory.Gold = 0;
					m_Inventory.Items.Clear();
				}

				m_Inventory.Delete();
			}
		}
	}
}