using System;
using System.IO;

namespace Server.Network;

public sealed class DisplaySpellbook : Packet
{
    public DisplaySpellbook(Serial book) : base(0x24, 7)
    {
        Stream.Write(book);
        Stream.Write((short)-1);
    }
}

public sealed class DisplaySpellbookHS : Packet
{
    public DisplaySpellbookHS(Serial book) : base(0x24, 9)
    {
        Stream.Write(book);
        Stream.Write((short)-1);
        Stream.Write((short)0x7D);
    }
}

public sealed class NewSpellbookContent : Packet
{
    public NewSpellbookContent(Serial spellbook, int graphic, int offset, ulong content) : base(0xBF)
    {
        EnsureCapacity(23);

        Stream.Write((short)0x1B);
        Stream.Write((short)0x01);

        Stream.Write(spellbook);
        Stream.Write((short)graphic);
        Stream.Write((short)offset);

        for (var i = 0; i < 8; ++i)
        {
            Stream.Write((byte)(content >> (i * 8)));
        }
    }
}

public sealed class SpellbookContent : Packet
{
    public SpellbookContent(Serial spellbook, int offset, ulong content) : base(0x3C)
    {
        EnsureCapacity(5 + 64 * 19);

        var written = 0;

        Stream.Write((ushort)0);

        ulong mask = 1;

        for (var i = 0; i < 64; ++i, mask <<= 1)
        {
            if ((content & mask) != 0)
            {
                Stream.Write(0x7FFFFFFF - i);
                Stream.Write((ushort)0);
                Stream.Write((byte)0);
                Stream.Write((ushort)(i + offset));
                Stream.Write((short)0);
                Stream.Write((short)0);
                Stream.Write(spellbook);
                Stream.Write((short)0);

                ++written;
            }
        }

        Stream.Seek(3, SeekOrigin.Begin);
        Stream.Write((ushort)written);
    }
}

public sealed class SpellbookContent6017 : Packet
{
    public SpellbookContent6017(Serial spellbook, int offset, ulong content) : base(0x3C)
    {
        EnsureCapacity(5 + 64 * 20);

        var written = 0;

        Stream.Write((ushort)0);

        ulong mask = 1;

        for (var i = 0; i < 64; ++i, mask <<= 1)
        {
            if ((content & mask) != 0)
            {
                Stream.Write(0x7FFFFFFF - i);
                Stream.Write((ushort)0);
                Stream.Write((byte)0);
                Stream.Write((ushort)(i + offset));
                Stream.Write((short)0);
                Stream.Write((short)0);
                Stream.Write((byte)0); // Grid Location?
                Stream.Write(spellbook);
                Stream.Write((short)0);

                ++written;
            }
        }

        Stream.Seek(3, SeekOrigin.Begin);
        Stream.Write((ushort)written);
    }
}

public sealed class ContainerDisplay : Packet
{
    public ContainerDisplay(Serial cont, int gumpId) : base(0x24, 7)
    {
        Stream.Write(cont);
        Stream.Write((short)gumpId);
    }
}

public sealed class ContainerDisplayHS : Packet
{
    public ContainerDisplayHS(Serial cont, int gumpId) : base(0x24, 9)
    {
        Stream.Write(cont);
        Stream.Write((short)gumpId);
        Stream.Write((short)0x7D);
    }
}

public sealed class ContainerContentUpdate : Packet
{
    public ContainerContentUpdate(Item item) : base(0x25, 20)
    {
        Serial parentSerial;

        if (item.Parent is Item parentItem)
        {
            parentSerial = parentItem.Serial;
        }
        else
        {
            Console.WriteLine("Warning: ContainerContentUpdate on item with !(parent is Item)");
            parentSerial = Serial.Zero;
        }

        Stream.Write(item.Serial);
        Stream.Write((ushort)item.ItemID);
        Stream.Write((byte)0); // signed, itemID offset
        Stream.Write((ushort)Math.Min(item.Amount, ushort.MaxValue));
        Stream.Write((short)item.X);
        Stream.Write((short)item.Y);
        Stream.Write(parentSerial);
        Stream.Write((ushort)(item.QuestItem ? Item.QuestItemHue : item.Hue));
    }
}

public sealed class ContainerContentUpdate6017 : Packet
{
    public ContainerContentUpdate6017(Item item) : base(0x25, 21)
    {
        Serial parentSerial;

        if (item.Parent is Item parentItem)
        {
            parentSerial = parentItem.Serial;
        }
        else
        {
            Console.WriteLine("Warning: ContainerContentUpdate on item with !(parent is Item)");
            parentSerial = Serial.Zero;
        }

        Stream.Write(item.Serial);
        Stream.Write((ushort)item.ItemID);
        Stream.Write((byte)0); // signed, itemID offset
        Stream.Write((ushort)Math.Min(item.Amount, ushort.MaxValue));
        Stream.Write((short)item.X);
        Stream.Write((short)item.Y);
        Stream.Write((byte)0); // Grid Location?
        Stream.Write(parentSerial);
        Stream.Write((ushort)(item.QuestItem ? Item.QuestItemHue : item.Hue));
    }
}

public sealed class ContainerContent : Packet
{
    public ContainerContent(Mobile beholder, Item beheld) : base(0x3C)
    {
        var items = beheld.Items;
        var count = items.Count;

        EnsureCapacity(5 + count * 19);

        var pos = Stream.Position;

        var written = 0;

        Stream.Write((ushort)0);

        for (var i = 0; i < count; ++i)
        {
            var child = items[i];

            if (!child.Deleted && beholder.CanSee(child))
            {
                var loc = child.Location;

                Stream.Write(child.Serial);
                Stream.Write((ushort)child.ItemID);
                Stream.Write((byte)0); // signed, itemID offset
                Stream.Write((ushort)Math.Min(child.Amount, ushort.MaxValue));
                Stream.Write((short)loc.X);
                Stream.Write((short)loc.Y);
                Stream.Write(beheld.Serial);
                Stream.Write((ushort)(child.QuestItem ? Item.QuestItemHue : child.Hue));

                ++written;
            }
        }

        Stream.Seek(pos, SeekOrigin.Begin);
        Stream.Write((ushort)written);
    }
}

public sealed class ContainerContent6017 : Packet
{
    public ContainerContent6017(Mobile beholder, Item beheld) : base(0x3C)
    {
        var items = beheld.Items;
        var count = items.Count;

        EnsureCapacity(5 + count * 20);

        var pos = Stream.Position;

        var written = 0;

        Stream.Write((ushort)0);

        for (var i = 0; i < count; ++i)
        {
            var child = items[i];

            if (!child.Deleted && beholder.CanSee(child))
            {
                var loc = child.Location;

                Stream.Write(child.Serial);
                Stream.Write((ushort)child.ItemID);
                Stream.Write((byte)0); // signed, itemID offset
                Stream.Write((ushort)Math.Min(child.Amount, ushort.MaxValue));
                Stream.Write((short)loc.X);
                Stream.Write((short)loc.Y);
                Stream.Write((byte)0); // Grid Location?
                Stream.Write(beheld.Serial);
                Stream.Write((ushort)(child.QuestItem ? Item.QuestItemHue : child.Hue));

                ++written;
            }
        }

        Stream.Seek(pos, SeekOrigin.Begin);
        Stream.Write((ushort)written);
    }
}