using System.Collections.Generic;
using Server.Items;

namespace Server.Network;

public sealed class VendorBuyContent : Packet
{
    public VendorBuyContent(List<BuyItemState> list, bool containerGridLines) : base(0x3C)
    {
        EnsureCapacity(list.Count * 19 + 5);

        Stream.Write((short)list.Count);

        for (var i = list.Count - 1; i >= 0; --i)
        {
            var bis = list[i];

            Stream.Write(bis.MySerial);
            Stream.Write((ushort)bis.ItemID);
            Stream.Write((byte)0); // itemID offset
            Stream.Write((ushort)bis.Amount);
            Stream.Write((short)(i + 1)); // x
            Stream.Write((short)1);       // y
            if (containerGridLines)
            {
                Stream.Write((byte)0); // Grid Location?
            }
            Stream.Write(bis.ContainerSerial);
            Stream.Write((ushort)bis.Hue);
        }
    }
}

public sealed class DisplayBuyList : Packet
{
    public DisplayBuyList(Serial vendor, bool highSeas) : base(0x24, highSeas ? 9 : 7)
    {
        Stream.Write(vendor);
        Stream.Write((short)0x30); // buy window id?
        if (highSeas)
        {
            Stream.Write((short)0x00);
        }
    }
}

public sealed class VendorBuyList : Packet
{
    public VendorBuyList(Mobile vendor, List<BuyItemState> list) : base(0x74)
    {
        EnsureCapacity(256);

        Stream.Write(vendor.FindItemOnLayer(Layer.ShopBuy) is not Container buyPack ? Serial.MinusOne : buyPack.Serial);

        Stream.Write((byte)list.Count);

        for (var i = 0; i < list.Count; ++i)
        {
            var bis = list[i];

            Stream.Write(bis.Price);

            var desc = bis.Description ?? "";

            Stream.Write((byte)(desc.Length + 1));
            Stream.WriteAsciiNull(desc);
        }
    }
}

public sealed class EndVendorBuy : Packet
{
    public EndVendorBuy(Serial vendor) : base(0x3B, 8)
    {
        Stream.Write((ushort)8); // length
        Stream.Write(vendor);
        Stream.Write((byte)0);
    }
}