package client

import (
	"errors"
	"net/url"
	"strings"
)

type Reference struct {
	urlobj     *url.URL
	user, pass string
	repo, tag  string
}

func NewReference(rawref string) (*Reference, error) {
	ref := &Reference{}
	if !strings.Contains(rawref, "://") {
		rawref = "https://" + rawref
	}
	urlobj, err := url.Parse(rawref)
	if err != nil {
		return ref, err
	}
	if urlobj.User != nil {
		ref.user = urlobj.User.Username()
		ref.pass, _ = urlobj.User.Password()
		urlobj.User = nil
	}
	repotag := strings.SplitN(urlobj.Path, ":", 2)
	if len(repotag) != 2 {
		err = errors.New("Incorrect repo")
		return ref, err
	}
        ref.urlobj = urlobj
	ref.urlobj.Path = ""
	ref.repo = repotag[0]
	ref.tag = repotag[1]
	ref.urlobj = urlobj

	return ref, err
}

func (ref *Reference) Manifest() string {
	curl := ref.urlobj.JoinPath("/v2", ref.repo, "/manifests", ref.tag)
	return curl.String()
}

func (ref *Reference) Blob(digest string) string {
	curl := ref.urlobj.JoinPath("/v2", ref.repo, "/blobs", digest)
	return curl.String()
}

func (ref *Reference) Userinfo() (string, string) {
        return ref.user, ref.pass
}