[Parser(Opcode.CMSG_CAST_SPELL)]
        public static void HandleCastSpell(Packet packet)
        {
            packet.ReadByte("CastID");
            packet.ReadUInt32("SpellID");
            packet.ReadUInt32("Misc");

            // SpellTargetData
            packet.ResetBitReader();

            packet.ReadEnum<TargetFlag>("Flags", 21);
            var bit72 = packet.ReadBit("HasSrcLocation");
            var bit112 = packet.ReadBit("HasDstLocation");
            var bit124 = packet.ReadBit("HasOrientation");
            var bits128 = packet.ReadBits(7);

            packet.ReadPackedGuid128("Unit Guid");
            packet.ReadPackedGuid128("Item Guid");

            if (bit72)
            {
                packet.ReadPackedGuid128("SrcLocation Guid");
                packet.ReadVector3("SrcLocation");
            }

            if (bit112)
            {
                packet.ReadPackedGuid128("DstLocation Guid");
                packet.ReadVector3("DstLocation");
            }

            if (bit124)
                packet.ReadSingle("Orientation");

            packet.ReadWoWString("Name", bits128);

            // MissileTrajectoryRequest
            packet.ReadSingle("Pitch");
            packet.ReadSingle("Speed");

            packet.ReadPackedGuid128("Guid");

            packet.ResetBitReader();

            packet.ReadBits("SendCastFlags", 5);
            var bit456 = packet.ReadBit("HasMoveUpdate"); // MoveUpdate

            var bits116 = packet.ReadBits("SpellWeightCount", 2); // SpellWeight

            // MoveUpdate
            if (bit456)
                MovementHandler.ReadMovementStats(ref packet);

            // SpellWeight
            for (var i = 0; i < bits116; ++i)
            {
                packet.ResetBitReader();
                packet.ReadBits("Type", 2, i);
                packet.ReadInt32("ID", i);
                packet.ReadInt32("Quantity", i);
            }
        }