package main

func CheckComplexity(p CppParameter) error {

	if p.QMapOf() {
		return ErrTooComplex // Example???
	}
	if p.QPairOf() {
		return ErrTooComplex // e.g. QGradientStop
	}
	if t, ok := p.QListOf(); ok {
		if err := CheckComplexity(t); err != nil { // e.g. QGradientStops is a QVector<> (OK) of QGradientStop (not OK)
			return err
		}
	}

	switch p.ParameterType {
	case
		"QList<QVariant>",       // e.g. QVariant constructor - this has a deleted copy-constructor so we can't get it over the CABI boundary by value
		"QPolygon", "QPolygonF", // QPolygon extends a template type
		"QLatin1String", "QStringView", // e.g. QColor constructors and QColor::SetNamedColor() overloads. These are usually optional alternatives to QString
		"QGradientStop", "QGradientStops", // QPair<>-related types, but we can't see through the typedef to block based on QPair alone
		"void **",                  // e.g. qobjectdefs.h QMetaObject->Activate()
		"char *&",                  // e.g. QDataStream.operator<<()
		"qfloat16",                 // e.g. QDataStream - there is no such half-float type in C or Go
		"char16_t",                 // e.g. QChar() constructor overload, just unnecessary
		"picture_io_handler",       // e.g. QPictureIO::DefineIOHandler callback function
		"QPlatformNativeInterface", // e.g. QGuiApplication::platformNativeInterface(). Private type, could probably expose as uintptr. n.b. Changes in Qt6
		"QFunctionPointer",         // e.g. QGuiApplication_PlatformFunction
		"QPlatformMenu":            // e.g. QMenu_PlatformMenu. Defined in the QPA, could probably expose as uintptr
		return ErrTooComplex
	}

	if p.ParameterType == "void" && p.Pointer {
		return ErrTooComplex // e.g. qobjectdefs.h QMetaObject->InvokeOnGadget(). TODO represent as uintptr
	}

	// Should be OK
	return nil
}