// RegisterDriver registers the network driver when it gets discovered.
func (r *DrvRegistry) RegisterDriver(ntype string, driver driverapi.Driver, capability driverapi.Capability) error {
	if strings.TrimSpace(ntype) == "" {
		return fmt.Errorf("network type string cannot be empty")
	}

	r.Lock()
	_, ok := r.drivers[ntype]
	r.Unlock()

	if ok {
		return driverapi.ErrActiveRegistration(ntype)
	}

	if r.dfn != nil {
		if err := r.dfn(ntype, driver, capability); err != nil {
			return err
		}
	}

	dData := &driverData{driver, capability}

	r.Lock()
	r.drivers[ntype] = dData
	r.Unlock()

	return nil
}

func (c *controller) RegisterDriver(networkType string, driver driverapi.Driver) error {
	c.Lock()
	defer c.Unlock()
	if _, ok := c.drivers[networkType]; ok {
		return driverapi.ErrActiveRegistration(networkType)
	}
	c.drivers[networkType] = driver
	return nil
}

func (c *controller) RegisterDriver(networkType string, driver driverapi.Driver, capability driverapi.Capability) error {
	if !config.IsValidName(networkType) {
		return ErrInvalidName(networkType)
	}

	c.Lock()
	if _, ok := c.drivers[networkType]; ok {
		c.Unlock()
		return driverapi.ErrActiveRegistration(networkType)
	}
	c.drivers[networkType] = &driverData{driver, capability}
	c.Unlock()

	return nil
}

func (c *controller) RegisterDriver(networkType string, driver driverapi.Driver, capability driverapi.Capability) error {
	c.Lock()
	if !config.IsValidName(networkType) {
		c.Unlock()
		return ErrInvalidName(networkType)
	}
	if _, ok := c.drivers[networkType]; ok {
		c.Unlock()
		return driverapi.ErrActiveRegistration(networkType)
	}
	c.drivers[networkType] = &driverData{driver, capability}

	if c.cfg == nil {
		c.Unlock()
		return nil
	}

	opt := make(map[string]interface{})
	for _, label := range c.cfg.Daemon.Labels {
		if strings.HasPrefix(label, netlabel.DriverPrefix+"."+networkType) {
			opt[netlabel.Key(label)] = netlabel.Value(label)
		}
	}

	if capability.DataScope == datastore.GlobalScope && c.validateGlobalStoreConfig() {
		opt[netlabel.KVProvider] = c.cfg.GlobalStore.Client.Provider
		opt[netlabel.KVProviderURL] = c.cfg.GlobalStore.Client.Address
	}

	if capability.DataScope == datastore.LocalScope {
		localStoreConfig := c.getLocalStoreConfig(c.cfg)
		opt[netlabel.KVProvider] = localStoreConfig.Client.Provider
		opt[netlabel.KVProviderURL] = localStoreConfig.Client.Address
		opt[netlabel.KVProviderConfig] = localStoreConfig.Client.Config
	}

	c.Unlock()

	if len(opt) != 0 {
		if err := driver.Config(opt); err != nil {
			return err
		}
	}

	return nil
}

func (c *controller) RegisterDriver(networkType string, driver driverapi.Driver, capability driverapi.Capability) error {
	if !config.IsValidName(networkType) {
		return ErrInvalidName(networkType)
	}

	c.Lock()
	if _, ok := c.drivers[networkType]; ok {
		c.Unlock()
		return driverapi.ErrActiveRegistration(networkType)
	}
	dData := &driverData{driver, capability}
	c.drivers[networkType] = dData
	hd := c.discovery
	c.Unlock()

	if hd != nil {
		c.pushNodeDiscovery(dData, hd.Fetch(), true)
	}

	return nil
}

func (c *controller) RegisterIpamDriver(name string, driver ipamapi.Ipam) error {
	if !config.IsValidName(name) {
		return ErrInvalidName(name)
	}

	c.Lock()
	_, ok := c.ipamDrivers[name]
	c.Unlock()
	if ok {
		return driverapi.ErrActiveRegistration(name)
	}
	locAS, glbAS, err := driver.GetDefaultAddressSpaces()
	if err != nil {
		return fmt.Errorf("ipam driver %s failed to return default address spaces: %v", name, err)
	}
	c.Lock()
	c.ipamDrivers[name] = &ipamData{driver: driver, defaultLocalAddressSpace: locAS, defaultGlobalAddressSpace: glbAS}
	c.Unlock()

	log.Debugf("Registering ipam provider: %s", name)

	return nil
}