package libraryelements

import (
	"github.com/grafana/grafana/pkg/api/routing"
	"github.com/grafana/grafana/pkg/infra/log"
	"github.com/grafana/grafana/pkg/models"
	"github.com/grafana/grafana/pkg/registry"
	"github.com/grafana/grafana/pkg/services/sqlstore"
	"github.com/grafana/grafana/pkg/setting"
)

// Service is a service for operating on library elements.
type Service interface {
	CreateElement(c *models.ReqContext, cmd CreateLibraryElementCommand) (LibraryElementDTO, error)
	GetElementsForDashboard(c *models.ReqContext, dashboardID int64) (map[string]LibraryElementDTO, error)
	ConnectElementsToDashboard(c *models.ReqContext, elementUIDs []string, dashboardID int64) error
	DisconnectElementsFromDashboard(c *models.ReqContext, dashboardID int64) error
	DeleteLibraryElementsInFolder(c *models.ReqContext, folderUID string) error
}

// LibraryElementService is the service for the Library Element feature.
type LibraryElementService struct {
	Cfg           *setting.Cfg          `inject:""`
	SQLStore      *sqlstore.SQLStore    `inject:""`
	RouteRegister routing.RouteRegister `inject:""`
	log           log.Logger
}

func init() {
	registry.RegisterService(&LibraryElementService{})
}

// Init initializes the LibraryElement service
func (l *LibraryElementService) Init() error {
	l.log = log.New("library-elements")

	l.registerAPIEndpoints()

	return nil
}

// CreateElement creates a Library Element.
func (l *LibraryElementService) CreateElement(c *models.ReqContext, cmd CreateLibraryElementCommand) (LibraryElementDTO, error) {
	return l.createLibraryElement(c, cmd)
}

// GetElementsForDashboard gets all connected elements for a specific dashboard.
func (l *LibraryElementService) GetElementsForDashboard(c *models.ReqContext, dashboardID int64) (map[string]LibraryElementDTO, error) {
	return l.getElementsForDashboardID(c, dashboardID)
}

// ConnectElementsToDashboard connects elements to a specific dashboard.
func (l *LibraryElementService) ConnectElementsToDashboard(c *models.ReqContext, elementUIDs []string, dashboardID int64) error {
	return l.connectElementsToDashboardID(c, elementUIDs, dashboardID)
}

// DisconnectElementsFromDashboard disconnects elements from a specific dashboard.
func (l *LibraryElementService) DisconnectElementsFromDashboard(c *models.ReqContext, dashboardID int64) error {
	return l.disconnectElementsFromDashboardID(c, dashboardID)
}

// DeleteLibraryElementsInFolder deletes all elements for a specific folder.
func (l *LibraryElementService) DeleteLibraryElementsInFolder(c *models.ReqContext, folderUID string) error {
	return l.deleteLibraryElementsInFolderUID(c, folderUID)
}