// <copyright file="PacketTwisterOfGuildInfo.cs" company="MUnique">
// Licensed under the MIT License. See LICENSE file in the project root for full license information.
// </copyright>

namespace MUnique.OpenMU.Network.PacketTwister;

/// <summary>
/// PacketTwister implementation for packets of 'GuildInfo' type.
/// </summary>
internal class PacketTwisterOfGuildInfo : IPacketTwister
{
    /// <inheritdoc/>
    public void Twist(Span<byte> data)
    {
        if (data.Length >= 4)
        {
            if (data.Length >= 8)
            {
                if (data.Length >= 16)
                {
                    if (data.Length >= 32)
                    {
                        var v10 = data[27];
                        data[27] = data[7];
                        data[7] = v10;
                        var v11 = (byte)(data[31] >> 6);
                        data[31] *= 4;
                        data[31] |= v11;
                        var v12 = (byte)(data[0] >> 4);
                        data[0] *= 16;
                        data[0] |= v12;
                        data[29] ^= 0x39;
                        data[13] ^= 0xCA;
                        var v13 = data[9];
                        data[9] = data[17];
                        data[17] = v13;
                        data[10] ^= 0xC2;
                        var v14 = data[6];
                        data[6] = data[11];
                        data[11] = v14;
                    }
                    else
                    {
                        var v17 = (byte)((data[2] >> 3) & 1);
                        if (((data[2] >> 6) & 1) != 0)
                        {
                            data[2] |= 8;
                        }
                        else
                        {
                            data[2] &= 0xF7;
                        }

                        if (v17 != 0)
                        {
                            data[2] |= 0x40;
                        }
                        else
                        {
                            data[2] &= 0xBF;
                        }

                        var v16 = (byte)((data[11] >> 2) & 1);
                        if (((data[11] >> 7) & 1) != 0)
                        {
                            data[11] |= 4;
                        }
                        else
                        {
                            data[11] &= 0xFB;
                        }

                        if (v16 != 0)
                        {
                            data[11] |= 0x80;
                        }
                        else
                        {
                            data[11] &= 0x7F;
                        }

                        data[12] ^= 0x2A;
                        var v6 = data[6];
                        data[6] = data[3];
                        data[3] = v6;
                        var v7 = (byte)(data[7] >> 5);
                        data[7] *= 8;
                        data[7] |= v7;
                        var v8 = data[9];
                        data[9] = data[10];
                        data[10] = v8;
                        var v15 = (byte)((data[10] >> 3) & 1);
                        if (((data[10] >> 4) & 1) != 0)
                        {
                            data[10] |= 8;
                        }
                        else
                        {
                            data[10] &= 0xF7;
                        }

                        if (v15 != 0)
                        {
                            data[10] |= 0x10;
                        }
                        else
                        {
                            data[10] &= 0xEF;
                        }

                        var v9 = (byte)(data[9] >> 5);
                        data[9] *= 8;
                        data[9] |= v9;
                        data[11] ^= 0xA0;
                    }
                }
                else
                {
                    data[5] ^= 0x35;
                    var v20 = (byte)((data[1] >> 1) & 1);
                    if (((data[1] >> 4) & 1) != 0)
                    {
                        data[1] |= 2;
                    }
                    else
                    {
                        data[1] &= 0xFD;
                    }

                    if (v20 != 0)
                    {
                        data[1] |= 0x10;
                    }
                    else
                    {
                        data[1] &= 0xEF;
                    }

                    var v19 = (byte)((data[3] >> 2) & 1);
                    if (((data[3] >> 1) & 1) != 0)
                    {
                        data[3] |= 4;
                    }
                    else
                    {
                        data[3] &= 0xFB;
                    }

                    if (v19 != 0)
                    {
                        data[3] |= 2;
                    }
                    else
                    {
                        data[3] &= 0xFD;
                    }

                    var v3 = (byte)(data[2] >> 6);
                    data[2] *= 4;
                    data[2] |= v3;
                    data[7] ^= 0x95;
                    var v4 = (byte)(data[6] >> 1);
                    data[6] <<= 7;
                    data[6] |= v4;
                    var v5 = data[1];
                    data[1] = data[6];
                    data[6] = v5;
                    var v18 = (byte)((data[3] >> 4) & 1);
                    if (((data[3] >> 1) & 1) != 0)
                    {
                        data[3] |= 0x10;
                    }
                    else
                    {
                        data[3] &= 0xEF;
                    }

                    if (v18 != 0)
                    {
                        data[3] |= 2;
                    }
                    else
                    {
                        data[3] &= 0xFD;
                    }
                }
            }
            else
            {
                var v2 = (byte)((data[3] >> 2) & 1);
                if (((data[3] >> 2) & 1) != 0)
                {
                    data[3] |= 4;
                }
                else
                {
                    data[3] &= 0xFB;
                }

                if (v2 != 0)
                {
                    data[3] |= 4;
                }
                else
                {
                    data[3] &= 0xFB;
                }

                data[3] ^= 0x7F;
                var v21 = (byte)((data[2] >> 5) & 1);
                if (((data[2] >> 4) & 1) != 0)
                {
                    data[2] |= 0x20;
                }
                else
                {
                    data[2] &= 0xDF;
                }

                if (v21 != 0)
                {
                    data[2] |= 0x10;
                }
                else
                {
                    data[2] &= 0xEF;
                }
            }
        }
    }

    /// <inheritdoc/>
    public void Correct(Span<byte> data)
    {
        if (data.Length >= 4)
        {
            if (data.Length >= 8)
            {
                if (data.Length >= 16)
                {
                    if (data.Length >= 32)
                    {
                        var v10 = data[6];
                        data[6] = data[11];
                        data[11] = v10;
                        data[10] ^= 0xC2;
                        var v11 = data[9];
                        data[9] = data[17];
                        data[17] = v11;
                        data[13] ^= 0xCA;
                        data[29] ^= 0x39;
                        var v12 = (byte)(data[0] >> 4);
                        data[0] *= 16;
                        data[0] |= v12;
                        var v13 = (byte)(data[31] >> 2);
                        data[31] <<= 6;
                        data[31] |= v13;
                        var v14 = data[27];
                        data[27] = data[7];
                        data[7] = v14;
                    }
                    else
                    {
                        data[11] ^= 0xA0;
                        var v6 = (byte)(data[9] >> 3);
                        data[9] *= 32;
                        data[9] |= v6;
                        var v17 = (byte)((data[10] >> 3) & 1);
                        if (((data[10] >> 4) & 1) != 0)
                        {
                            data[10] |= 8;
                        }
                        else
                        {
                            data[10] &= 0xF7;
                        }

                        if (v17 != 0)
                        {
                            data[10] |= 0x10;
                        }
                        else
                        {
                            data[10] &= 0xEF;
                        }

                        var v7 = data[9];
                        data[9] = data[10];
                        data[10] = v7;
                        var v8 = (byte)(data[7] >> 3);
                        data[7] *= 32;
                        data[7] |= v8;
                        var v9 = data[6];
                        data[6] = data[3];
                        data[3] = v9;
                        data[12] ^= 0x2A;
                        var v16 = (byte)((data[11] >> 2) & 1);
                        if (((data[11] >> 7) & 1) != 0)
                        {
                            data[11] |= 4;
                        }
                        else
                        {
                            data[11] &= 0xFB;
                        }

                        if (v16 != 0)
                        {
                            data[11] |= 0x80;
                        }
                        else
                        {
                            data[11] &= 0x7F;
                        }

                        var v15 = (byte)((data[2] >> 3) & 1);
                        if (((data[2] >> 6) & 1) != 0)
                        {
                            data[2] |= 8;
                        }
                        else
                        {
                            data[2] &= 0xF7;
                        }

                        if (v15 != 0)
                        {
                            data[2] |= 0x40;
                        }
                        else
                        {
                            data[2] &= 0xBF;
                        }
                    }
                }
                else
                {
                    var v20 = (byte)((data[3] >> 4) & 1);
                    if (((data[3] >> 1) & 1) != 0)
                    {
                        data[3] |= 0x10;
                    }
                    else
                    {
                        data[3] &= 0xEF;
                    }

                    if (v20 != 0)
                    {
                        data[3] |= 2;
                    }
                    else
                    {
                        data[3] &= 0xFD;
                    }

                    var v3 = data[1];
                    data[1] = data[6];
                    data[6] = v3;
                    var v4 = (byte)(data[6] >> 7);
                    data[6] *= 2;
                    data[6] |= v4;
                    data[7] ^= 0x95;
                    var v5 = (byte)(data[2] >> 2);
                    data[2] <<= 6;
                    data[2] |= v5;
                    var v19 = (byte)((data[3] >> 2) & 1);
                    if (((data[3] >> 1) & 1) != 0)
                    {
                        data[3] |= 4;
                    }
                    else
                    {
                        data[3] &= 0xFB;
                    }

                    if (v19 != 0)
                    {
                        data[3] |= 2;
                    }
                    else
                    {
                        data[3] &= 0xFD;
                    }

                    var v18 = (byte)((data[1] >> 1) & 1);
                    if (((data[1] >> 4) & 1) != 0)
                    {
                        data[1] |= 2;
                    }
                    else
                    {
                        data[1] &= 0xFD;
                    }

                    if (v18 != 0)
                    {
                        data[1] |= 0x10;
                    }
                    else
                    {
                        data[1] &= 0xEF;
                    }

                    data[5] ^= 0x35;
                }
            }
            else
            {
                var v2 = (byte)((data[2] >> 5) & 1);
                if (((data[2] >> 4) & 1) != 0)
                {
                    data[2] |= 0x20;
                }
                else
                {
                    data[2] &= 0xDF;
                }

                if (v2 != 0)
                {
                    data[2] |= 0x10;
                }
                else
                {
                    data[2] &= 0xEF;
                }

                data[3] ^= 0x7F;
                var v21 = (byte)((data[3] >> 2) & 1);
                if (((data[3] >> 2) & 1) != 0)
                {
                    data[3] |= 4;
                }
                else
                {
                    data[3] &= 0xFB;
                }

                if (v21 != 0)
                {
                    data[3] |= 4;
                }
                else
                {
                    data[3] &= 0xFB;
                }
            }
        }
    }
}