package auth

import (
	"errors"
	"strings"
)

var methods []Authenticator

// Register a method
func Register(method Authenticator) {
	methods = append(methods, method)
}

// FindAuthenticator finds the first Method that answers with
// the ID().
func FindAuthenticator(id string) Authenticator {
	for _, method := range methods {
		if method.ID() == id {
			return method
		}
	}

	return nil
}

// ListAuthenticators gets a copy of the method list
func ListAuthenticators() []Authenticator {
	dst := make([]Authenticator, len(methods))
	copy(dst, methods)

	return dst
}

func FindUser(fullid string) (*User, error) {
	split := strings.SplitN(fullid, ":", 2)
	autherID := split[0]
	userID := split[1]

	auther := FindAuthenticator(autherID)
	if auther == nil {
		return nil, errors.New("auth: auther not found")
	}

	return auther.Find(userID), nil
}