// <copyright file="PacketTwisterOfPersonalShop.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 'PersonalShop' type.
/// </summary>
internal class PacketTwisterOfPersonalShop : 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 v14 = (byte)(data[31] >> 6);
                        data[31] *= 4;
                        data[31] |= v14;
                        var v25 = (byte)((data[0] >> 2) & 1);
                        if (((data[0] >> 3) & 1) != 0)
                        {
                            data[0] |= 4;
                        }
                        else
                        {
                            data[0] &= 0xFB;
                        }

                        if (v25 != 0)
                        {
                            data[0] |= 8;
                        }
                        else
                        {
                            data[0] &= 0xF7;
                        }

                        var v15 = (byte)(data[28] >> 1);
                        data[28] <<= 7;
                        data[28] |= v15;
                        var v16 = data[28];
                        data[28] = data[13];
                        data[13] = v16;
                        var v24 = (byte)((data[19] >> 5) & 1);
                        if (((data[19] >> 4) & 1) != 0)
                        {
                            data[19] |= 0x20;
                        }
                        else
                        {
                            data[19] &= 0xDF;
                        }

                        if (v24 != 0)
                        {
                            data[19] |= 0x10;
                        }
                        else
                        {
                            data[19] &= 0xEF;
                        }

                        var v17 = data[8];
                        data[8] = data[31];
                        data[31] = v17;
                        var v18 = (byte)(data[9] >> 6);
                        data[9] *= 4;
                        data[9] |= v18;
                        var v19 = data[10];
                        data[10] = data[19];
                        data[19] = v19;
                        var v23 = (byte)((data[13] >> 4) & 1);
                        if (((data[13] >> 3) & 1) != 0)
                        {
                            data[13] |= 0x10;
                        }
                        else
                        {
                            data[13] &= 0xEF;
                        }

                        if (v23 != 0)
                        {
                            data[13] |= 8;
                        }
                        else
                        {
                            data[13] &= 0xF7;
                        }

                        var v20 = (byte)(data[3] >> 3);
                        data[3] *= 32;
                        data[3] |= v20;
                        var v22 = (byte)((data[9] >> 3) & 1);
                        if (((data[9] >> 4) & 1) != 0)
                        {
                            data[9] |= 8;
                        }
                        else
                        {
                            data[9] &= 0xF7;
                        }

                        if (v22 != 0)
                        {
                            data[9] |= 0x10;
                        }
                        else
                        {
                            data[9] &= 0xEF;
                        }

                        var v21 = data[22];
                        data[22] = data[9];
                        data[9] = v21;
                    }
                    else
                    {
                        var v10 = data[15];
                        data[15] = data[9];
                        data[9] = v10;
                        var v11 = (byte)(data[5] >> 7);
                        data[5] *= 2;
                        data[5] |= v11;
                        data[8] ^= 0xAE;
                        var v12 = data[12];
                        data[12] = data[6];
                        data[6] = v12;
                        var v28 = (byte)((data[8] >> 5) & 1);
                        if (((data[8] >> 4) & 1) != 0)
                        {
                            data[8] |= 0x20;
                        }
                        else
                        {
                            data[8] &= 0xDF;
                        }

                        if (v28 != 0)
                        {
                            data[8] |= 0x10;
                        }
                        else
                        {
                            data[8] &= 0xEF;
                        }

                        var v27 = (byte)((data[3] >> 2) & 1);
                        if (((data[3] >> 4) & 1) != 0)
                        {
                            data[3] |= 4;
                        }
                        else
                        {
                            data[3] &= 0xFB;
                        }

                        if (v27 != 0)
                        {
                            data[3] |= 0x10;
                        }
                        else
                        {
                            data[3] &= 0xEF;
                        }

                        data[15] ^= 0x57;
                        var v13 = data[11];
                        data[11] = data[0];
                        data[0] = v13;
                        var v26 = (byte)((data[3] >> 2) & 1);
                        if (((data[3] >> 5) & 1) != 0)
                        {
                            data[3] |= 4;
                        }
                        else
                        {
                            data[3] &= 0xFB;
                        }

                        if (v26 != 0)
                        {
                            data[3] |= 0x20;
                        }
                        else
                        {
                            data[3] &= 0xDF;
                        }

                        data[13] ^= 0xB2;
                    }
                }
                else
                {
                    var v2 = (byte)((data[0] >> 2) & 1);
                    if (((data[0] >> 1) & 1) != 0)
                    {
                        data[0] |= 4;
                    }
                    else
                    {
                        data[0] &= 0xFB;
                    }

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

                    var v6 = data[4];
                    data[4] = data[6];
                    data[6] = v6;
                    var v7 = (byte)(data[1] >> 6);
                    data[1] *= 4;
                    data[1] |= v7;
                    var v8 = data[7];
                    data[7] = data[6];
                    data[6] = v8;
                    var v9 = data[4];
                    data[4] = data[0];
                    data[0] = v9;
                }
            }
            else
            {
                var v3 = data[2];
                data[2] = data[2];
                data[2] = v3;
                var v4 = data[3];
                data[3] = data[3];
                data[3] = v4;
                var v5 = (byte)(data[1] >> 2);
                data[1] <<= 6;
                data[1] |= v5;
                data[1] ^= 0x5A;
            }
        }
    }

    /// <inheritdoc/>
    public void Correct(Span<byte> data)
    {
        if (data.Length >= 4)
        {
            if (data.Length >= 8)
            {
                if (data.Length >= 16)
                {
                    if (data.Length >= 32)
                    {
                        var v14 = data[22];
                        data[22] = data[9];
                        data[9] = v14;
                        var v25 = (byte)((data[9] >> 3) & 1);
                        if (((data[9] >> 4) & 1) != 0)
                        {
                            data[9] |= 8;
                        }
                        else
                        {
                            data[9] &= 0xF7;
                        }

                        if (v25 != 0)
                        {
                            data[9] |= 0x10;
                        }
                        else
                        {
                            data[9] &= 0xEF;
                        }

                        var v15 = (byte)(data[3] >> 5);
                        data[3] *= 8;
                        data[3] |= v15;
                        var v24 = (byte)((data[13] >> 4) & 1);
                        if (((data[13] >> 3) & 1) != 0)
                        {
                            data[13] |= 0x10;
                        }
                        else
                        {
                            data[13] &= 0xEF;
                        }

                        if (v24 != 0)
                        {
                            data[13] |= 8;
                        }
                        else
                        {
                            data[13] &= 0xF7;
                        }

                        var v16 = data[10];
                        data[10] = data[19];
                        data[19] = v16;
                        var v17 = (byte)(data[9] >> 2);
                        data[9] <<= 6;
                        data[9] |= v17;
                        var v18 = data[8];
                        data[8] = data[31];
                        data[31] = v18;
                        var v23 = (byte)((data[19] >> 5) & 1);
                        if (((data[19] >> 4) & 1) != 0)
                        {
                            data[19] |= 0x20;
                        }
                        else
                        {
                            data[19] &= 0xDF;
                        }

                        if (v23 != 0)
                        {
                            data[19] |= 0x10;
                        }
                        else
                        {
                            data[19] &= 0xEF;
                        }

                        var v19 = data[28];
                        data[28] = data[13];
                        data[13] = v19;
                        var v20 = (byte)(data[28] >> 7);
                        data[28] *= 2;
                        data[28] |= v20;
                        var v22 = (byte)((data[0] >> 2) & 1);
                        if (((data[0] >> 3) & 1) != 0)
                        {
                            data[0] |= 4;
                        }
                        else
                        {
                            data[0] &= 0xFB;
                        }

                        if (v22 != 0)
                        {
                            data[0] |= 8;
                        }
                        else
                        {
                            data[0] &= 0xF7;
                        }

                        var v21 = (byte)(data[31] >> 2);
                        data[31] <<= 6;
                        data[31] |= v21;
                    }
                    else
                    {
                        data[13] ^= 0xB2;
                        var v28 = (byte)((data[3] >> 2) & 1);
                        if (((data[3] >> 5) & 1) != 0)
                        {
                            data[3] |= 4;
                        }
                        else
                        {
                            data[3] &= 0xFB;
                        }

                        if (v28 != 0)
                        {
                            data[3] |= 0x20;
                        }
                        else
                        {
                            data[3] &= 0xDF;
                        }

                        var v10 = data[11];
                        data[11] = data[0];
                        data[0] = v10;
                        data[15] ^= 0x57;
                        var v27 = (byte)((data[3] >> 2) & 1);
                        if (((data[3] >> 4) & 1) != 0)
                        {
                            data[3] |= 4;
                        }
                        else
                        {
                            data[3] &= 0xFB;
                        }

                        if (v27 != 0)
                        {
                            data[3] |= 0x10;
                        }
                        else
                        {
                            data[3] &= 0xEF;
                        }

                        var v26 = (byte)((data[8] >> 5) & 1);
                        if (((data[8] >> 4) & 1) != 0)
                        {
                            data[8] |= 0x20;
                        }
                        else
                        {
                            data[8] &= 0xDF;
                        }

                        if (v26 != 0)
                        {
                            data[8] |= 0x10;
                        }
                        else
                        {
                            data[8] &= 0xEF;
                        }

                        var v11 = data[12];
                        data[12] = data[6];
                        data[6] = v11;
                        data[8] ^= 0xAE;
                        var v12 = (byte)(data[5] >> 1);
                        data[5] <<= 7;
                        data[5] |= v12;
                        var v13 = data[15];
                        data[15] = data[9];
                        data[9] = v13;
                    }
                }
                else
                {
                    var v6 = data[4];
                    data[4] = data[0];
                    data[0] = v6;
                    var v7 = data[7];
                    data[7] = data[6];
                    data[6] = v7;
                    var v8 = (byte)(data[1] >> 2);
                    data[1] <<= 6;
                    data[1] |= v8;
                    var v9 = data[4];
                    data[4] = data[6];
                    data[6] = v9;
                    var v2 = (byte)((data[0] >> 2) & 1);
                    if (((data[0] >> 1) & 1) != 0)
                    {
                        data[0] |= 4;
                    }
                    else
                    {
                        data[0] &= 0xFB;
                    }

                    if (v2 != 0)
                    {
                        data[0] |= 2;
                    }
                    else
                    {
                        data[0] &= 0xFD;
                    }
                }
            }
            else
            {
                data[1] ^= 0x5A;
                var v3 = (byte)(data[1] >> 6);
                data[1] *= 4;
                data[1] |= v3;
                var v4 = data[3];
                data[3] = data[3];
                data[3] = v4;
                var v5 = data[2];
                data[2] = data[2];
                data[2] = v5;
            }
        }
    }
}