// Package reflection helps Marshalling/Unmarshalling data to structs
package reflection

import (
	"reflect"
)

// Reflection provides Marshalling/Unmarshalling oriented view
// of a value
type Reflection struct {
	v reflect.Value
}

// Value returns the object it reflects
func (r *Reflection) Value() any {
	return r.v.Interface()
}

// New creates a Reflection of the given pointer
func New(v any) (*Reflection, error) {
	rv := reflect.ValueOf(v)

	if rv.Kind() != reflect.Pointer || rv.IsNil() {
		err := &InvalidUnmarshalError{Type: rv.Type()}
		return nil, err
	}

	r := &Reflection{
		v: rv,
	}

	if err := r.scan(); err != nil {
		return nil, err
	}

	return r, nil
}