type BootstrapHandler func(
	ctx context.Context,
	wg *sync.WaitGroup,
	startupTimer startup.Timer,
	dic *di.Container) (success bool)

type CertificateProvider interface {
	// GetCertificateKeyPair retrieves certificate pair.
	GetCertificateKeyPair(path string) (config.CertKeyPair, error)
}

type Configuration interface {
	// UpdateFromRaw converts configuration received from the registry to a service-specific configuration struct which is
	// then used to overwrite the service's existing configuration struct.
	UpdateFromRaw(rawConfig interface{}) bool

	// EmptyWritablePtr returns a pointer to a service-specific empty WritableInfo struct.  It is used by the bootstrap to
	// provide the appropriate structure to registry.Client's WatchForChanges().
	EmptyWritablePtr() interface{}

	// UpdateWritableFromRaw converts configuration received from the registry to a service-specific WritableInfo struct
	// which is then used to overwrite the service's existing configuration's WritableInfo struct.
	UpdateWritableFromRaw(rawWritable interface{}) bool

	// GetBootstrap returns the configuration elements required by the bootstrap.
	GetBootstrap() config.BootstrapConfiguration

	// GetLogLevel returns the current ConfigurationStruct's log level.
	GetLogLevel() string

	// GetRegistryInfo gets the config.RegistryInfo field from the ConfigurationStruct.
	GetRegistryInfo() config.RegistryInfo

	// GetInsecureSecrets gets the config.InsecureSecrets field from the ConfigurationStruct.
	GetInsecureSecrets() config.InsecureSecrets
}

type CredentialsProvider interface {
	// GetDatabaseCredentials retrieves database credentials.
	GetDatabaseCredentials(database config.Database) (config.Credentials, error)
}

type SecretProvider interface {
	// StoreSecrets stores new secrets into the service's SecretStore at the specified path.
	StoreSecrets(path string, secrets map[string]string) error

	// GetSecrets retrieves secrets from the service's SecretStore at the specified path.
	GetSecrets(path string, keys ...string) (map[string]string, error)

	// SecretsUpdated sets the secrets last updated time to current time.
	SecretsUpdated()

	// SecretsLastUpdated returns the last time secrets were updated
	SecretsLastUpdated() time.Time
}