using System;
using System.Collections;
using System.Collections.Generic;
using Server.Items;
using Server.Network;
using Server.ContextMenus;
using Server.Mobiles;
using Server.Misc;
using Server.Engines.BulkOrders;
using Server.Regions;
using Server.Factions;

namespace Server.Mobiles
{
	public enum VendorShoeType
	{
		None,
		Shoes,
		Boots,
		Sandals,
		ThighBoots
	}

	public abstract class BaseVendor : BaseCreature, IVendor
	{
		private const int MaxSell = 500;

		protected abstract List<SBInfo> SBInfos { get; }

		private ArrayList m_ArmorBuyInfo = new ArrayList();
		private ArrayList m_ArmorSellInfo = new ArrayList();

		private DateTime m_LastRestock;

		private DateTime m_NextTrickOrTreat;

		public override bool CanTeach { get { return true; } }

		public override bool BardImmune { get { return true; } }

		public override bool PlayerRangeSensitive { get { return true; } }

		public virtual bool IsActiveVendor { get { return true; } }
		public virtual bool IsActiveBuyer { get { return IsActiveVendor; } } // response to vendor SELL
		public virtual bool IsActiveSeller { get { return IsActiveVendor; } } // repsonse to vendor BUY

		public virtual NpcGuild NpcGuild { get { return NpcGuild.None; } }

		public override bool IsInvulnerable { get { return true; } }

		public virtual DateTime NextTrickOrTreat { get { return m_NextTrickOrTreat; } set { m_NextTrickOrTreat = value; } }

		public override bool ShowFameTitle { get { return false; } }

		public virtual bool IsValidBulkOrder( Item item )
		{
			return false;
		}

		public virtual Item CreateBulkOrder( Mobile from, bool fromContextMenu )
		{
			return null;
		}

		public virtual bool SupportsBulkOrders( Mobile from )
		{
			return false;
		}

		public virtual TimeSpan GetNextBulkOrder( Mobile from )
		{
			return TimeSpan.Zero;
		}

		public virtual void OnSuccessfulBulkOrderReceive( Mobile from )
		{
		}

		#region Faction
		public virtual int GetPriceScalar( Mobile buyer )
		{
			Town town = Town.FromRegion( this.Region );

			if ( town != null )
				return ( 100 + town.Tax );

			return 100;
		}

		public void UpdateBuyInfo( Mobile buyer )
		{
			int priceScalar = GetPriceScalar( buyer );

			IBuyItemInfo[] buyinfo = (IBuyItemInfo[])m_ArmorBuyInfo.ToArray( typeof( IBuyItemInfo ) );

			if ( buyinfo != null )
			{
				foreach ( IBuyItemInfo info in buyinfo )
					info.PriceScalar = priceScalar;
			}
		}
		#endregion

		private class BulkOrderInfoEntry : ContextMenuEntry
		{
			private Mobile m_From;
			private BaseVendor m_Vendor;

			public BulkOrderInfoEntry( Mobile from, BaseVendor vendor )
				: base( 6152 )
			{
				m_From = from;
				m_Vendor = vendor;
			}

			public override void OnClick()
			{
				if ( m_Vendor.SupportsBulkOrders( m_From ) )
				{
					TimeSpan ts = m_Vendor.GetNextBulkOrder( m_From );

					int totalSeconds = (int)ts.TotalSeconds;
					int totalHours = ( totalSeconds + 3599 ) / 3600;
					int totalMinutes = ( totalSeconds + 59 ) / 60;

					if ( ( ( Core.SE ) ? totalMinutes == 0 : totalHours == 0 ) )
					{
						m_From.SendLocalizedMessage( 1049038 ); // You can get an order now.

						if ( Core.AOS )
						{
							Item bulkOrder = m_Vendor.CreateBulkOrder( m_From, true );

							if ( bulkOrder is LargeBOD )
								m_From.SendGump( new LargeBODAcceptGump( m_From, (LargeBOD)bulkOrder ) );
							else if ( bulkOrder is SmallBOD )
								m_From.SendGump( new SmallBODAcceptGump( m_From, (SmallBOD)bulkOrder ) );
						}
					}
					else
					{
						int oldSpeechHue = m_Vendor.SpeechHue;
						m_Vendor.SpeechHue = 0x3B2;

						if ( Core.SE )
							m_Vendor.SayTo( m_From, 1072058, totalMinutes.ToString() ); // An offer may be available in about ~1_minutes~ minutes.
						else
							m_Vendor.SayTo( m_From, 1049039, totalHours.ToString() ); // An offer may be available in about ~1_hours~ hours.

						m_Vendor.SpeechHue = oldSpeechHue;
					}
				}
			}
		}

		public BaseVendor( string title )
			: base( AIType.AI_Vendor, FightMode.None, 2, 1, 0.5, 2 )
		{
			LoadSBInfo();

			this.Title = title;
			InitBody();
			InitOutfit();

			Container pack;
			//these packs MUST exist, or the client will crash when the packets are sent
			pack = new Backpack();
			pack.Layer = Layer.ShopBuy;
			pack.Movable = false;
			pack.Visible = false;
			AddItem( pack );

			pack = new Backpack();
			pack.Layer = Layer.ShopResale;
			pack.Movable = false;
			pack.Visible = false;
			AddItem( pack );

			m_LastRestock = DateTime.UtcNow;
		}

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

		public DateTime LastRestock
		{
			get
			{
				return m_LastRestock;
			}
			set
			{
				m_LastRestock = value;
			}
		}

		public virtual TimeSpan RestockDelay
		{
			get
			{
				return TimeSpan.FromHours( 1 );
			}
		}

		public Container BuyPack
		{
			get
			{
				Container pack = FindItemOnLayer( Layer.ShopBuy ) as Container;

				if ( pack == null )
				{
					pack = new Backpack();
					pack.Layer = Layer.ShopBuy;
					pack.Visible = false;
					AddItem( pack );
				}

				return pack;
			}
		}

		public abstract void InitSBInfo();

		public virtual bool IsTokunoVendor { get { return ( Map == Map.Tokuno ); } }

		protected void LoadSBInfo()
		{
			m_LastRestock = DateTime.UtcNow;

			for ( int i = 0; i < m_ArmorBuyInfo.Count; ++i )
			{
				GenericBuyInfo buy = m_ArmorBuyInfo[i] as GenericBuyInfo;

				if ( buy != null )
					buy.DeleteDisplayEntity();
			}

			SBInfos.Clear();

			InitSBInfo();

			m_ArmorBuyInfo.Clear();
			m_ArmorSellInfo.Clear();

			for ( int i = 0; i < SBInfos.Count; i++ )
			{
				SBInfo sbInfo = (SBInfo)SBInfos[i];
				m_ArmorBuyInfo.AddRange( sbInfo.BuyInfo );
				m_ArmorSellInfo.Add( sbInfo.SellInfo );
			}
		}

		public virtual bool GetGender()
		{
			return Utility.RandomBool();
		}

		public virtual void InitBody()
		{
			InitStats( 100, 100, 25 );

			SpeechHue = Utility.RandomDyedHue();
			Hue = Utility.RandomSkinHue();

			if ( Female = GetGender() )
			{
				Body = 0x191;
				Name = NameList.RandomName( "female" );
			}
			else
			{
				Body = 0x190;
				Name = NameList.RandomName( "male" );
			}
		}

		public virtual int GetRandomHue()
		{
			switch ( Utility.Random( 5 ) )
			{
				default:
				case 0: return Utility.RandomBlueHue();
				case 1: return Utility.RandomGreenHue();
				case 2: return Utility.RandomRedHue();
				case 3: return Utility.RandomYellowHue();
				case 4: return Utility.RandomNeutralHue();
			}
		}

		public virtual int GetShoeHue()
		{
			if ( 0.1 > Utility.RandomDouble() )
				return 0;

			return Utility.RandomNeutralHue();
		}

		public virtual VendorShoeType ShoeType
		{
			get { return VendorShoeType.Shoes; }
		}

		public virtual void CheckMorph()
		{
			if ( CheckGargoyle() )
				return;

			if ( CheckNecromancer() )
				return;

			CheckTokuno();
		}

		public virtual bool CheckTokuno()
		{
			if ( this.Map != Map.Tokuno )
				return false;

			NameList n;

			if ( Female )
				n = NameList.GetNameList( "tokuno female" );
			else
				n = NameList.GetNameList( "tokuno male" );

			if ( !n.ContainsName( this.Name ) )
				TurnToTokuno();

			return true;
		}

		public virtual void TurnToTokuno()
		{
			if ( Female )
				this.Name = NameList.RandomName( "tokuno female" );
			else
				this.Name = NameList.RandomName( "tokuno male" );
		}

		public virtual bool CheckGargoyle()
		{
			Map map = this.Map;

			if ( map != Map.Ilshenar )
				return false;

			if ( !Region.IsPartOf( "Gargoyle City" ) )
				return false;

			if ( Body != 0x2F6 || ( Hue & 0x8000 ) == 0 )
				TurnToGargoyle();

			return true;
		}

		public virtual bool CheckNecromancer()
		{
			Map map = this.Map;

			if ( map != Map.Malas )
				return false;

			if ( !Region.IsPartOf( "Umbra" ) )
				return false;

			if ( Hue != 0x83E8 )
				TurnToNecromancer();

			return true;
		}

		public override void OnAfterSpawn()
		{
			CheckMorph();
		}

		protected override void OnMapChange( Map oldMap )
		{
			base.OnMapChange( oldMap );

			CheckMorph();

			LoadSBInfo();
		}

		public virtual int GetRandomNecromancerHue()
		{
			switch ( Utility.Random( 20 ) )
			{
				case 0: return 0;
				case 1: return 0x4E9;
				default: return Utility.RandomList( 0x485, 0x497 );
			}
		}

		public virtual void TurnToNecromancer()
		{
			for ( int i = 0; i < this.Items.Count; ++i )
			{
				Item item = this.Items[i];

				if ( item is Hair || item is Beard )
					item.Hue = 0;
				else if ( item is BaseClothing || item is BaseWeapon || item is BaseArmor || item is BaseTool )
					item.Hue = GetRandomNecromancerHue();
			}

			HairHue = 0;
			FacialHairHue = 0;

			Hue = 0x83E8;
		}

		public virtual void TurnToGargoyle()
		{
			for ( int i = 0; i < this.Items.Count; ++i )
			{
				Item item = this.Items[i];

				if ( item is BaseClothing || item is Hair || item is Beard )
					item.Delete();
			}

			HairItemID = 0;
			FacialHairItemID = 0;

			Body = 0x2F6;
			Hue = Utility.RandomBrightHue() | 0x8000;
			Name = NameList.RandomName( "gargoyle vendor" );

			CapitalizeTitle();
		}

		public virtual void CapitalizeTitle()
		{
			string title = this.Title;

			if ( title == null )
				return;

			string[] split = title.Split( ' ' );

			for ( int i = 0; i < split.Length; ++i )
			{
				if ( Insensitive.Equals( split[i], "the" ) )
					continue;

				if ( split[i].Length > 1 )
					split[i] = Char.ToUpper( split[i][0] ) + split[i].Substring( 1 );
				else if ( split[i].Length > 0 )
					split[i] = Char.ToUpper( split[i][0] ).ToString();
			}

			this.Title = String.Join( " ", split );
		}

		public virtual int GetHairHue()
		{
			return Utility.RandomHairHue();
		}

		public virtual void InitOutfit()
		{
			switch ( Utility.Random( 3 ) )
			{
				case 0: AddItem( new FancyShirt( GetRandomHue() ) ); break;
				case 1: AddItem( new Doublet( GetRandomHue() ) ); break;
				case 2: AddItem( new Shirt( GetRandomHue() ) ); break;
			}

			switch ( ShoeType )
			{
				case VendorShoeType.Shoes: AddItem( new Shoes( GetShoeHue() ) ); break;
				case VendorShoeType.Boots: AddItem( new Boots( GetShoeHue() ) ); break;
				case VendorShoeType.Sandals: AddItem( new Sandals( GetShoeHue() ) ); break;
				case VendorShoeType.ThighBoots: AddItem( new ThighBoots( GetShoeHue() ) ); break;
			}

			int hairHue = GetHairHue();

			Utility.AssignRandomHair( this, hairHue );
			Utility.AssignRandomFacialHair( this, hairHue );

			if ( Female )
			{
				switch ( Utility.Random( 6 ) )
				{
					case 0: AddItem( new ShortPants( GetRandomHue() ) ); break;
					case 1:
					case 2: AddItem( new Kilt( GetRandomHue() ) ); break;
					case 3:
					case 4:
					case 5: AddItem( new Skirt( GetRandomHue() ) ); break;
				}
			}
			else
			{
				switch ( Utility.Random( 2 ) )
				{
					case 0: AddItem( new LongPants( GetRandomHue() ) ); break;
					case 1: AddItem( new ShortPants( GetRandomHue() ) ); break;
				}
			}

			PackGold( 100, 200 );
		}

		public virtual void Restock()
		{
			m_LastRestock = DateTime.UtcNow;

			IBuyItemInfo[] buyInfo = this.GetBuyInfo( );

			foreach ( IBuyItemInfo bii in buyInfo )
				bii.OnRestock();
		}

		private static TimeSpan InventoryDecayTime = TimeSpan.FromHours( 1.0 );

		public virtual void VendorBuy( Mobile from )
		{
			if ( !IsActiveSeller )
				return;

			if ( !from.CheckAlive() )
				return;

			if ( !CheckVendorAccess( from ) )
			{
				Say( 501522 ); // I shall not treat with scum like thee!
				return;
			}

			if ( DateTime.UtcNow - m_LastRestock > RestockDelay )
				Restock();

			UpdateBuyInfo( from );

			int count = 0;
			List<BuyItemState> list;
			IBuyItemInfo[] buyInfo = this.GetBuyInfo();
			IShopSellInfo[] sellInfo = this.GetSellInfo();

			list = new List<BuyItemState>( buyInfo.Length );
			Container cont = this.BuyPack;

			List<ObjectPropertyList> opls = null;

			for ( int idx = 0; idx < buyInfo.Length; idx++ )
			{
				IBuyItemInfo buyItem = (IBuyItemInfo)buyInfo[idx];

				if ( buyItem.Amount <= 0 || list.Count >= 250 )
					continue;

				// NOTE: Only GBI supported; if you use another implementation of IBuyItemInfo, this will crash
				GenericBuyInfo gbi = (GenericBuyInfo)buyItem;
				IEntity disp = gbi.GetDisplayEntity();

				list.Add( new BuyItemState( buyItem.Name, cont.Serial, disp == null ? (Serial)0x7FC0FFEE : disp.Serial, buyItem.Price, buyItem.Amount, buyItem.ItemID, buyItem.Hue ) );
				count++;

				if ( opls == null ) {
					opls = new List<ObjectPropertyList>();
				}

				if ( disp is Item ) {
					opls.Add( ( ( Item ) disp ).PropertyList );
				} else if ( disp is Mobile ) {
					opls.Add( ( ( Mobile ) disp ).PropertyList );
				}
			}

			List<Item> playerItems = cont.Items;

			for ( int i = playerItems.Count - 1; i >= 0; --i )
			{
				if ( i >= playerItems.Count )
					continue;

				Item item = playerItems[i];

				if ( ( item.LastMoved + InventoryDecayTime ) <= DateTime.UtcNow )
					item.Delete();
			}

			for ( int i = 0; i < playerItems.Count; ++i )
			{
				Item item = playerItems[i];

				int price = 0;
				string name = null;

				foreach ( IShopSellInfo ssi in sellInfo )
				{
					if ( ssi.IsSellable( item ) )
					{
						price = ssi.GetBuyPriceFor( item );
						name = ssi.GetNameFor( item );
						break;
					}
				}

				if ( name != null && list.Count < 250 )
				{
					list.Add( new BuyItemState( name, cont.Serial, item.Serial, price, item.Amount, item.ItemID, item.Hue ) );
					count++;

					if ( opls == null ) {
						opls = new List<ObjectPropertyList>();
					}

					opls.Add( item.PropertyList );
				}
			}

			//one (not all) of the packets uses a byte to describe number of items in the list.  Osi = dumb.
			//if ( list.Count > 255 )
			//	Console.WriteLine( "Vendor Warning: Vendor {0} has more than 255 buy items, may cause client errors!", this );

			if ( list.Count > 0 )
			{
				list.Sort( new BuyItemStateComparer() );

				SendPacksTo( from );

				NetState ns = from.NetState;

				if ( ns == null )
					return;

				if ( ns.ContainerGridLines )
					from.Send( new VendorBuyContent6017( list ) );
				else
					from.Send( new VendorBuyContent( list ) );

				from.Send( new VendorBuyList( this, list ) );

				if ( ns.HighSeas )
					from.Send( new DisplayBuyListHS( this ) );
				else
					from.Send( new DisplayBuyList( this ) );

				from.Send( new MobileStatusExtended( from ) );//make sure their gold amount is sent

				if ( opls != null ) {
					for ( int i = 0; i < opls.Count; ++i ) {
						from.Send( opls[i] );
					}
				}

				SayTo( from, 500186 ); // Greetings.  Have a look around.
			}
		}

		public virtual void SendPacksTo( Mobile from )
		{
			Item pack = FindItemOnLayer( Layer.ShopBuy );

			if ( pack == null )
			{
				pack = new Backpack();
				pack.Layer = Layer.ShopBuy;
				pack.Movable = false;
				pack.Visible = false;
				AddItem( pack );
			}

			from.Send( new EquipUpdate( pack ) );

			pack = FindItemOnLayer( Layer.ShopSell );

			if ( pack != null )
				from.Send( new EquipUpdate( pack ) );

			pack = FindItemOnLayer( Layer.ShopResale );

			if ( pack == null )
			{
				pack = new Backpack();
				pack.Layer = Layer.ShopResale;
				pack.Movable = false;
				pack.Visible = false;
				AddItem( pack );
			}

			from.Send( new EquipUpdate( pack ) );
		}

		public virtual void VendorSell( Mobile from )
		{
			if ( !IsActiveBuyer )
				return;

			if ( !from.CheckAlive() )
				return;

			if ( !CheckVendorAccess( from ) )
			{
				Say( 501522 ); // I shall not treat with scum like thee!
				return;
			}

			Container pack = from.Backpack;

			if ( pack != null )
			{
				IShopSellInfo[] info = GetSellInfo();

				List<SellItemState> table = new List<SellItemState>();

				foreach ( IShopSellInfo ssi in info )
				{
					Item[] items = pack.FindItemsByType( ssi.Types );

					foreach ( Item item in items )
					{
						if ( item is Container && ( (Container)item ).Items.Count != 0 )
							continue;

						LockableContainer parentcon = item.Parent as LockableContainer;

						if ( parentcon != null && parentcon.Locked )
							continue;

						if ( item.IsStandardLoot() && item.Movable && ssi.IsSellable( item ) )
							table.Add( new SellItemState( item, ssi.GetSellPriceFor( item ), ssi.GetNameFor( item ) ) );
					}
				}

				if ( table.Count > 0 )
				{
					SendPacksTo( from );

					from.Send( new VendorSellList( this, table ) );
				}
				else
				{
					Say( true, "You have nothing I would be interested in." );
				}
			}
		}

		public override bool OnDragDrop( Mobile from, Item dropped )
		{
			/* TODO: Thou art giving me? and fame/karma for gold gifts */

			if ( dropped is SmallBOD || dropped is LargeBOD )
			{
				PlayerMobile pm = from as PlayerMobile;

				if ( Core.ML && pm != null && pm.NextBODTurnInTime > DateTime.UtcNow )
				{
					SayTo( from, 1079976 ); // You'll have to wait a few seconds while I inspect the last order.
					return false;
				}
				else if ( !IsValidBulkOrder( dropped ) )
				{
					SayTo( from, 1045130 ); // That order is for some other shopkeeper.
					return false;
				}
				else if ( ( dropped is SmallBOD && !( (SmallBOD)dropped ).Complete ) || ( dropped is LargeBOD && !( (LargeBOD)dropped ).Complete ) )
				{
					SayTo( from, 1045131 ); // You have not completed the order yet.
					return false;
				}

				Item reward;
				int gold, fame;

				if ( dropped is SmallBOD )
					( (SmallBOD)dropped ).GetRewards( out reward, out gold, out fame );
				else
					( (LargeBOD)dropped ).GetRewards( out reward, out gold, out fame );

				from.SendSound( 0x3D );

				SayTo( from, 1045132 ); // Thank you so much!  Here is a reward for your effort.

				if ( reward != null )
					from.AddToBackpack( reward );

				if ( gold > 1000 )
					from.AddToBackpack( new BankCheck( gold ) );
				else if ( gold > 0 )
					from.AddToBackpack( new Gold( gold ) );

				Titles.AwardFame( from, fame, true );

				OnSuccessfulBulkOrderReceive( from );

				if ( Core.ML && pm != null )
					pm.NextBODTurnInTime = DateTime.UtcNow + TimeSpan.FromSeconds( 10.0 );

				dropped.Delete();
				return true;
			}

			return base.OnDragDrop( from, dropped );
		}

		private GenericBuyInfo LookupDisplayObject( object obj )
		{
			IBuyItemInfo[] buyInfo = this.GetBuyInfo();

			for ( int i = 0; i < buyInfo.Length; ++i ) {
				GenericBuyInfo gbi = (GenericBuyInfo)buyInfo[i];

				if ( gbi.GetDisplayEntity() == obj )
					return gbi;
			}

			return null;
		}

		private void ProcessSinglePurchase( BuyItemResponse buy, IBuyItemInfo bii, List<BuyItemResponse> validBuy, ref int controlSlots, ref bool fullPurchase, ref int totalCost )
		{
			int amount = buy.Amount;

			if ( amount > bii.Amount )
				amount = bii.Amount;

			if ( amount <= 0 )
				return;

			int slots = bii.ControlSlots * amount;

			if ( controlSlots >= slots )
			{
				controlSlots -= slots;
			}
			else
			{
				fullPurchase = false;
				return;
			}

			totalCost += bii.Price * amount;
			validBuy.Add( buy );
		}

		private void ProcessValidPurchase( int amount, IBuyItemInfo bii, Mobile buyer, Container cont )
		{
			if ( amount > bii.Amount )
				amount = bii.Amount;

			if ( amount < 1 )
				return;

			bii.Amount -= amount;

			IEntity o = bii.GetEntity();

			if ( o is Item )
			{
				Item item = (Item)o;

				if ( item.Stackable )
				{
					item.Amount = amount;

					if ( cont == null || !cont.TryDropItem( buyer, item, false ) )
						item.MoveToWorld( buyer.Location, buyer.Map );
				}
				else
				{
					item.Amount = 1;

					if ( cont == null || !cont.TryDropItem( buyer, item, false ) )
						item.MoveToWorld( buyer.Location, buyer.Map );

					for ( int i = 1; i < amount; i++ )
					{
						item = bii.GetEntity() as Item;

						if ( item != null )
						{
							item.Amount = 1;

							if ( cont == null || !cont.TryDropItem( buyer, item, false ) )
								item.MoveToWorld( buyer.Location, buyer.Map );
						}
					}
				}
			}
			else if ( o is Mobile )
			{
				Mobile m = (Mobile)o;

				m.Direction = (Direction)Utility.Random( 8 );
				m.MoveToWorld( buyer.Location, buyer.Map );
				m.PlaySound( m.GetIdleSound() );

                if (m is BaseCreature)
                {
                    ((BaseCreature)m).SetControlMaster(buyer);
                    ((BaseCreature)m).ControlOrder = OrderType.Stop;
                }

				for ( int i = 1; i < amount; ++i )
				{
					m = bii.GetEntity() as Mobile;

					if ( m != null )
					{
						m.Direction = (Direction)Utility.Random( 8 );
						m.MoveToWorld( buyer.Location, buyer.Map );

                        if (m is BaseCreature)
                        {
                            ((BaseCreature)m).SetControlMaster(buyer);
                            ((BaseCreature)m).ControlOrder = OrderType.Stop;
                        }
					}
				}
			}
		}

		public virtual bool OnBuyItems( Mobile buyer, List<BuyItemResponse> list )
		{
			if ( !IsActiveSeller )
				return false;

			if ( !buyer.CheckAlive() )
				return false;

			if ( !CheckVendorAccess( buyer ) )
			{
				Say( 501522 ); // I shall not treat with scum like thee!
				return false;
			}

			UpdateBuyInfo( buyer );

			IBuyItemInfo[] buyInfo = this.GetBuyInfo();
			IShopSellInfo[] info = GetSellInfo();
			int totalCost = 0;
			List<BuyItemResponse> validBuy = new List<BuyItemResponse>( list.Count );
			Container cont;
			bool bought = false;
			bool fromBank = false;
			bool fullPurchase = true;
			int controlSlots = buyer.FollowersMax - buyer.Followers;

			foreach ( BuyItemResponse buy in list )
			{
				Serial ser = buy.Serial;
				int amount = buy.Amount;

				if ( ser.IsItem )
				{
					Item item = World.FindItem( ser );

					if ( item == null )
						continue;

					GenericBuyInfo gbi = LookupDisplayObject( item );

					if ( gbi != null )
					{
						ProcessSinglePurchase( buy, gbi, validBuy, ref controlSlots, ref fullPurchase, ref totalCost );
					}
					else if ( item != this.BuyPack && item.IsChildOf( this.BuyPack ) )
					{
						if ( amount > item.Amount )
							amount = item.Amount;

						if ( amount <= 0 )
							continue;

						foreach ( IShopSellInfo ssi in info )
						{
							if ( ssi.IsSellable( item ) )
							{
								if ( ssi.IsResellable( item ) )
								{
									totalCost += ssi.GetBuyPriceFor( item ) * amount;
									validBuy.Add( buy );
									break;
								}
							}
						}
					}
				}
				else if ( ser.IsMobile )
				{
					Mobile mob = World.FindMobile( ser );

					if ( mob == null )
						continue;

					GenericBuyInfo gbi = LookupDisplayObject( mob );

					if ( gbi != null )
						ProcessSinglePurchase( buy, gbi, validBuy, ref controlSlots, ref fullPurchase, ref totalCost );
				}
			}//foreach

			if ( fullPurchase && validBuy.Count == 0 )
				SayTo( buyer, 500190 ); // Thou hast bought nothing!
			else if ( validBuy.Count == 0 )
				SayTo( buyer, 500187 ); // Your order cannot be fulfilled, please try again.

			if ( validBuy.Count == 0 )
				return false;

			bought = ( buyer.AccessLevel >= AccessLevel.GameMaster );

			cont = buyer.Backpack;
			if ( !bought && cont != null )
			{
				if ( cont.ConsumeTotal( typeof( Gold ), totalCost ) )
					bought = true;
				else if ( totalCost < 2000 )
					SayTo( buyer, 500192 ); // Begging thy pardon, but thou canst not afford that.
			}

			if ( !bought && totalCost >= 2000 )
			{
				cont = buyer.FindBankNoCreate();
				if ( cont != null && cont.ConsumeTotal( typeof( Gold ), totalCost ) )
				{
					bought = true;
					fromBank = true;
				}
				else
				{
					SayTo( buyer, 500191 ); //Begging thy pardon, but thy bank account lacks these funds.
				}
			}

			if ( !bought )
				return false;
			else
				buyer.PlaySound( 0x32 );

			cont = buyer.Backpack;
			if ( cont == null )
				cont = buyer.BankBox;

			foreach ( BuyItemResponse buy in validBuy )
			{
				Serial ser = buy.Serial;
				int amount = buy.Amount;

				if ( amount < 1 )
					continue;

				if ( ser.IsItem )
				{
					Item item = World.FindItem( ser );

					if ( item == null )
						continue;

					GenericBuyInfo gbi = LookupDisplayObject( item );

					if ( gbi != null )
					{
						ProcessValidPurchase( amount, gbi, buyer, cont );
					}
					else
					{
						if ( amount > item.Amount )
							amount = item.Amount;

						foreach ( IShopSellInfo ssi in info )
						{
							if ( ssi.IsSellable( item ) )
							{
								if ( ssi.IsResellable( item ) )
								{
									Item buyItem;
									if ( amount >= item.Amount )
									{
										buyItem = item;
									}
									else
									{
										buyItem = Mobile.LiftItemDupe( item, item.Amount - amount );

										if ( buyItem == null )
											buyItem = item;
									}

									if ( cont == null || !cont.TryDropItem( buyer, buyItem, false ) )
										buyItem.MoveToWorld( buyer.Location, buyer.Map );

									break;
								}
							}
						}
					}
				}
				else if ( ser.IsMobile )
				{
					Mobile mob = World.FindMobile( ser );

					if ( mob == null )
						continue;

					GenericBuyInfo gbi = LookupDisplayObject( mob );

					if ( gbi != null )
						ProcessValidPurchase( amount, gbi, buyer, cont );
				}
			}//foreach

			if ( fullPurchase )
			{
				if ( buyer.AccessLevel >= AccessLevel.GameMaster )
					SayTo( buyer, true, "I would not presume to charge thee anything.  Here are the goods you requested." );
				else if ( fromBank )
                    SayTo(buyer, 1151638, totalCost.ToString());//The total of your purchase is ~1_val~ gold, which has been drawn from your bank account.  My thanks for the patronage.
				else
                    SayTo(buyer, 1151639, totalCost.ToString());//The total of your purchase is ~1_val~ gold.  My thanks for the patronage.
			}
			else
			{
				if ( buyer.AccessLevel >= AccessLevel.GameMaster )
					SayTo( buyer, true, "I would not presume to charge thee anything.  Unfortunately, I could not sell you all the goods you requested." );
				else if ( fromBank )
					SayTo( buyer, true, "The total of thy purchase is {0} gold, which has been withdrawn from your bank account.  My thanks for the patronage.  Unfortunately, I could not sell you all the goods you requested.", totalCost );
				else
					SayTo( buyer, true, "The total of thy purchase is {0} gold.  My thanks for the patronage.  Unfortunately, I could not sell you all the goods you requested.", totalCost );
			}

			return true;
		}

		public virtual bool CheckVendorAccess( Mobile from )
		{
			GuardedRegion reg = (GuardedRegion)this.Region.GetRegion( typeof( GuardedRegion ) );

			if ( reg != null && !reg.CheckVendorAccess( this, from ) )
				return false;

			if ( this.Region != from.Region )
			{
				reg = (GuardedRegion)from.Region.GetRegion( typeof( GuardedRegion ) );

				if ( reg != null && !reg.CheckVendorAccess( this, from ) )
					return false;
			}

			return true;
		}

		public virtual bool OnSellItems( Mobile seller, List<SellItemResponse> list )
		{
			if ( !IsActiveBuyer )
				return false;

			if ( !seller.CheckAlive() )
				return false;

			if ( !CheckVendorAccess( seller ) )
			{
				Say( 501522 ); // I shall not treat with scum like thee!
				return false;
			}

			seller.PlaySound( 0x32 );

			IShopSellInfo[] info = GetSellInfo();
			IBuyItemInfo[] buyInfo = this.GetBuyInfo();
			int GiveGold = 0;
			int Sold = 0;
			Container cont;

			foreach ( SellItemResponse resp in list )
			{
				if ( resp.Item.RootParent != seller || resp.Amount <= 0 || !resp.Item.IsStandardLoot() || !resp.Item.Movable || ( resp.Item is Container && ( (Container)resp.Item ).Items.Count != 0 ) )
					continue;

				foreach ( IShopSellInfo ssi in info )
				{
					if ( ssi.IsSellable( resp.Item ) )
					{
						Sold++;
						break;
					}
				}
			}

			if ( Sold > MaxSell )
			{
				SayTo( seller, true, "You may only sell {0} items at a time!", MaxSell );
				return false;
			}
			else if ( Sold == 0 )
			{
				return true;
			}

			foreach ( SellItemResponse resp in list )
			{
				if ( resp.Item.RootParent != seller || resp.Amount <= 0 || !resp.Item.IsStandardLoot() || !resp.Item.Movable || ( resp.Item is Container && ( (Container)resp.Item ).Items.Count != 0 ) )
					continue;

				foreach ( IShopSellInfo ssi in info )
				{
					if ( ssi.IsSellable( resp.Item ) )
					{
						int amount = resp.Amount;

						if ( amount > resp.Item.Amount )
							amount = resp.Item.Amount;

						if ( ssi.IsResellable( resp.Item ) )
						{
							bool found = false;

							foreach ( IBuyItemInfo bii in buyInfo )
							{
								if ( bii.Restock( resp.Item, amount ) )
								{
									resp.Item.Consume( amount );
									found = true;

									break;
								}
							}

							if ( !found )
							{
								cont = this.BuyPack;

								if ( amount < resp.Item.Amount )
								{
									Item item = Mobile.LiftItemDupe( resp.Item, resp.Item.Amount - amount );

									if ( item != null )
									{
										item.SetLastMoved();
										cont.DropItem( item );
									}
									else
									{
										resp.Item.SetLastMoved();
										cont.DropItem( resp.Item );
									}
								}
								else
								{
									resp.Item.SetLastMoved();
									cont.DropItem( resp.Item );
								}
							}
						}
						else
						{
							if ( amount < resp.Item.Amount )
								resp.Item.Amount -= amount;
							else
								resp.Item.Delete();
						}

						GiveGold += ssi.GetSellPriceFor( resp.Item ) * amount;
						break;
					}
				}
			}

			if ( GiveGold > 0 )
			{
				while ( GiveGold > 60000 )
				{
					seller.AddToBackpack( new Gold( 60000 ) );
					GiveGold -= 60000;
				}

				seller.AddToBackpack( new Gold( GiveGold ) );

				seller.PlaySound( 0x0037 );//Gold dropping sound

				if ( SupportsBulkOrders( seller ) )
				{
					Item bulkOrder = CreateBulkOrder( seller, false );

					if ( bulkOrder is LargeBOD )
						seller.SendGump( new LargeBODAcceptGump( seller, (LargeBOD)bulkOrder ) );
					else if ( bulkOrder is SmallBOD )
						seller.SendGump( new SmallBODAcceptGump( seller, (SmallBOD)bulkOrder ) );
				}
			}

			return true;
		}

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

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

			List<SBInfo> sbInfos = this.SBInfos;

			for ( int i = 0; sbInfos != null && i < sbInfos.Count; ++i )
			{
				SBInfo sbInfo = sbInfos[i];
				List<GenericBuyInfo> buyInfo = sbInfo.BuyInfo;

				for ( int j = 0; buyInfo != null && j < buyInfo.Count; ++j )
				{
					GenericBuyInfo gbi = (GenericBuyInfo)buyInfo[j];

					int maxAmount = gbi.MaxAmount;
					int doubled = 0;

					switch ( maxAmount )
					{
						case  40: doubled = 1; break;
						case  80: doubled = 2; break;
						case 160: doubled = 3; break;
						case 320: doubled = 4; break;
						case 640: doubled = 5; break;
						case 999: doubled = 6; break;
					}

					if ( doubled > 0 )
					{
						writer.WriteEncodedInt( 1 + ( ( j * sbInfos.Count ) + i ) );
						writer.WriteEncodedInt( doubled );
					}
				}
			}

			writer.WriteEncodedInt( 0 );
		}

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

			int version = reader.ReadInt();

			LoadSBInfo();

			List<SBInfo> sbInfos = this.SBInfos;

			switch ( version )
			{
				case 1:
					{
						int index;

						while ( ( index = reader.ReadEncodedInt() ) > 0 )
						{
							int doubled = reader.ReadEncodedInt();

							if ( sbInfos != null )
							{
								index -= 1;
								int sbInfoIndex = index % sbInfos.Count;
								int buyInfoIndex = index / sbInfos.Count;

								if ( sbInfoIndex >= 0 && sbInfoIndex < sbInfos.Count )
								{
									SBInfo sbInfo = sbInfos[sbInfoIndex];
									List<GenericBuyInfo> buyInfo = sbInfo.BuyInfo;

									if ( buyInfo != null && buyInfoIndex >= 0 && buyInfoIndex < buyInfo.Count )
									{
										GenericBuyInfo gbi = (GenericBuyInfo)buyInfo[buyInfoIndex];

										int amount = 20;

										switch ( doubled )
										{
											case 1: amount = 40; break;
											case 2: amount = 80; break;
											case 3: amount = 160; break;
											case 4: amount = 320; break;
											case 5: amount = 640; break;
											case 6: amount = 999; break;
										}

										gbi.Amount = gbi.MaxAmount = amount;
									}
								}
							}
						}

						break;
					}
			}

			if ( IsParagon )
				IsParagon = false;

			Timer.DelayCall( CheckMorph );
		}

		public override void AddCustomContextEntries( Mobile from, List<ContextMenuEntry> list )
		{
			if ( from.Alive && IsActiveVendor )
			{
				if ( SupportsBulkOrders( from ) )
					list.Add( new BulkOrderInfoEntry( from, this ) );
				
				if ( IsActiveSeller )
					list.Add( new VendorBuyEntry( from, this ) );

				if ( IsActiveBuyer )
					list.Add( new VendorSellEntry( from, this ) );
			}

			base.AddCustomContextEntries( from, list );
		}

		public virtual IShopSellInfo[] GetSellInfo( )
		{
			return (IShopSellInfo[])m_ArmorSellInfo.ToArray( typeof( IShopSellInfo ) );
		}

		public virtual IBuyItemInfo[] GetBuyInfo( )
		{
			return (IBuyItemInfo[])m_ArmorBuyInfo.ToArray( typeof( IBuyItemInfo ) );
		}
	}
}

namespace Server.ContextMenus
{
	public class VendorBuyEntry : ContextMenuEntry
	{
		private BaseVendor m_Vendor;

		public VendorBuyEntry( Mobile from, BaseVendor vendor )
			: base( 6103, 8 )
		{
			m_Vendor = vendor;
			Enabled = vendor.CheckVendorAccess( from );
		}

		public override void OnClick()
		{
			m_Vendor.VendorBuy( this.Owner.From );
		}
	}

	public class VendorSellEntry : ContextMenuEntry
	{
		private BaseVendor m_Vendor;

		public VendorSellEntry( Mobile from, BaseVendor vendor )
			: base( 6104, 8 )
		{
			m_Vendor = vendor;
			Enabled = vendor.CheckVendorAccess( from );
		}

		public override void OnClick()
		{
			m_Vendor.VendorSell( this.Owner.From );
		}
	}
}

namespace Server
{
	public interface IShopSellInfo
	{
		//get display name for an item
		string GetNameFor( Item item );

		//get price for an item which the player is selling
		int GetSellPriceFor( Item item );

		//get price for an item which the player is buying
		int GetBuyPriceFor( Item item );

		//can we sell this item to this vendor?
		bool IsSellable( Item item );

		//What do we sell?
		Type[] Types { get; }

		//does the vendor resell this item?
		bool IsResellable( Item item );
	}

	public interface IBuyItemInfo
	{
		//get a new instance of an object (we just bought it)
		IEntity GetEntity();

		int ControlSlots { get; }

		int PriceScalar { get; set; }

		//display price of the item
		int Price { get; }

		//display name of the item
		string Name { get; }

		//display hue
		int Hue { get; }

		//display id
		int ItemID { get; }

		//amount in stock
		int Amount { get; set; }

		//max amount in stock
		int MaxAmount { get; }

		//Attempt to restock with item, (return true if restock sucessful)
		bool Restock( Item item, int amount );

		//called when its time for the whole shop to restock
		void OnRestock();
	}
}
