package bolt

import (
	"github.com/portainer/portainer"
	"github.com/portainer/portainer/bolt/internal"

	"github.com/boltdb/bolt"
)

// UserService represents a service for managing users.
type UserService struct {
	store *Store
}

// User returns a user by username.
func (service *UserService) User(username string) (*portainer.User, error) {
	var data []byte
	err := service.store.db.View(func(tx *bolt.Tx) error {
		bucket := tx.Bucket([]byte(userBucketName))
		value := bucket.Get([]byte(username))
		if value == nil {
			return portainer.ErrUserNotFound
		}

		data = make([]byte, len(value))
		copy(data, value)
		return nil
	})
	if err != nil {
		return nil, err
	}

	var user portainer.User
	err = internal.UnmarshalUser(data, &user)
	if err != nil {
		return nil, err
	}
	return &user, nil
}

// UpdateUser saves a user.
func (service *UserService) UpdateUser(user *portainer.User) error {
	data, err := internal.MarshalUser(user)
	if err != nil {
		return err
	}

	return service.store.db.Update(func(tx *bolt.Tx) error {
		bucket := tx.Bucket([]byte(userBucketName))
		err = bucket.Put([]byte(user.Username), data)
		if err != nil {
			return err
		}
		return nil
	})
}