private object InvokePropertyBagMember()

in ClearScript/HostItem.cs [1003:1134]
107 lines of code
29 McCabe index (conditional complexity)

        private object InvokePropertyBagMember(string name, BindingFlags invokeFlags, object[] args, object[] bindArgs)
        {
            if (invokeFlags.HasFlag(BindingFlags.InvokeMethod))
            {
                object value;

                if (name == SpecialMemberNames.Default)
                {
                    if (invokeFlags.HasFlag(BindingFlags.GetField))
                    {
                        if (args.Length < 1)
                        {
                            return TargetPropertyBag;
                        }

                        if (args.Length == 1)
                        {
                            return TargetPropertyBag.TryGetValue(Convert.ToString(args[0]), out value) ? value : Nonexistent.Value;
                        }
                    }

                    throw new NotSupportedException("The object does not support the requested invocation operation");
                }

                if (name == SpecialMemberNames.NewEnum)
                {
                    return CreateEnumerator(TargetPropertyBag);
                }

                if (name == SpecialMemberNames.NewAsyncEnum)
                {
                    return CreateAsyncEnumerator(TargetPropertyBag);
                }

                if (!TargetPropertyBag.TryGetValue(name, out value))
                {
                    throw new MissingMemberException(MiscHelpers.FormatInvariant("The object has no property named '{0}'", name));
                }

                if (InvokeHelpers.TryInvokeObject(this, value, invokeFlags, args, bindArgs, true, out var result))
                {
                    return result;
                }

                if (invokeFlags.HasFlag(BindingFlags.GetField))
                {
                    if (args.Length < 1)
                    {
                        return value;
                    }

                    if (args.Length == 1)
                    {
                        if (value == null)
                        {
                            throw new InvalidOperationException("Cannot invoke a null property value");
                        }

                        return ((HostItem)Wrap(Engine, value)).InvokeMember(SpecialMemberNames.Default, invokeFlags, args, bindArgs, null, true);
                    }
                }

                throw new NotSupportedException("The object does not support the requested invocation operation");
            }

            if (invokeFlags.HasFlag(BindingFlags.GetField))
            {
                if (name == SpecialMemberNames.Default)
                {
                    if (args.Length == 1)
                    {
                        return TargetPropertyBag[Convert.ToString(args[0])];
                    }

                    throw new InvalidOperationException("Invalid argument count");
                }

                if (name == SpecialMemberNames.NewEnum)
                {
                    return CreateEnumerator(TargetPropertyBag);
                }

                if (name == SpecialMemberNames.NewAsyncEnum)
                {
                    return CreateAsyncEnumerator(TargetPropertyBag);
                }

                if (args.Length < 1)
                {
                    return TargetPropertyBag.TryGetValue(name, out var value) ? value : Nonexistent.Value;
                }

                throw new InvalidOperationException("Invalid argument count");
            }

            if (invokeFlags.HasFlag(BindingFlags.SetField))
            {
                if (name == SpecialMemberNames.Default)
                {
                    if (args.Length == 2)
                    {
                        return TargetPropertyBag[Convert.ToString(args[0])] = args[1];
                    }

                    throw new InvalidOperationException("Invalid argument count");
                }

                if (args.Length == 1)
                {
                    return TargetPropertyBag[name] = args[0];
                }

                if (args.Length == 2)
                {
                    if (TargetPropertyBag.TryGetValue(name, out var value))
                    {
                        if (value == null)
                        {
                            throw new InvalidOperationException("Cannot invoke a null property value");
                        }

                        return ((HostItem)Wrap(Engine, value)).InvokeMember(SpecialMemberNames.Default, invokeFlags, args, bindArgs, null, true);
                    }

                    throw new MissingMemberException(MiscHelpers.FormatInvariant("The object has no property named '{0}'", name));
                }

                throw new InvalidOperationException("Invalid argument count");
            }

            throw new InvalidOperationException("Invalid member invocation mode");
        }