package imaging

import (
	domain "RenewCMS/internal/domain/image"
	"errors"
)

var errMalformedContainer = errors.New("malformed image container")

type MetadataStripper struct{}

var _ domain.MetadataStripper = &MetadataStripper{}

func NewMetadataStripper() *MetadataStripper {
	return &MetadataStripper{}
}

func (s *MetadataStripper) Strip(contentType string, data []byte) ([]byte, error) {
	var stripped []byte
	var err error
	switch contentType {
	case "image/jpeg":
		stripped, err = stripJPEG(data)
	case "image/png":
		stripped, err = stripPNG(data)
	case "image/webp":
		stripped, err = stripWebP(data)
	default:
		return data, nil
	}
	if err != nil {
		return nil, errors.Join(domain.ErrImageUnreadable, err)
	}
	return stripped, nil
}