// Copyright (c) Mainflux
// SPDX-License-Identifier: Apache-2.0

// Package uuid provides a UUID identity provider.
package uuid

import (
	"github.com/gofrs/uuid"
	"github.com/mainflux/mainflux/errors"
	"github.com/mainflux/mainflux/things"
)

// ErrGeneratingID indicates error in generating UUID
var ErrGeneratingID = errors.New("generating id failed")

var _ things.IdentityProvider = (*uuidIdentityProvider)(nil)

type uuidIdentityProvider struct{}

// New instantiates a UUID identity provider.
func New() things.IdentityProvider {
	return &uuidIdentityProvider{}
}

func (idp *uuidIdentityProvider) ID() (string, error) {
	id, err := uuid.NewV4()
	if err != nil {
		return "", errors.Wrap(ErrGeneratingID, err)
	}

	return id.String(), nil
}
