package annotation

import (
	"fmt"
	"reflect"

	cur "git.loafle.net/commons/util-go/reflect"
)

var annotationRegistry map[string]*AnnotationDefinition

func init() {
	annotationRegistry = make(map[string]*AnnotationDefinition, 0)
}

func RegisterAnnotation(name string, t reflect.Type) error {
	if _, ok := annotationRegistry[name]; ok {
		return fmt.Errorf("DI: name[%s] of annotation exist already", name)
	}

	meta := getMetaFields(t)
	fRT, _, _ := cur.GetTypeInfo(t)

	def := &AnnotationDefinition{
		t:      t,
		rt:     fRT,
		fields: meta,
	}

	annotationRegistry[name] = def

	return nil
}

type AnnotationDefinition struct {
	t  reflect.Type
	rt reflect.Type

	fields map[string]*AnnotationFieldMeta
}