package ezconf

// Integration is an interface that packages can implement to provide
// easy integration with ezconf
type Integration interface {
	// Name returns the name to use when registering the config
	Name() string

	// ConfigPointer returns a pointer to the config struct for tag parsing
	ConfigPointer() any

	// ConfigFunc returns the ConfigFromEnv function
	ConfigFunc() func() (any, error)

	// GroupName returns the display name for grouping environment variables
	GroupName() string
}

// RegisterIntegration registers a package that implements the Integration interface
func (cl *ConfigLoader) RegisterIntegration(integration Integration) error {
	// Add config struct for tag parsing
	configPtr := integration.ConfigPointer()
	if err := cl.AddConfigStruct(configPtr, integration.GroupName()); err != nil {
		return err
	}

	// Add config function
	if err := cl.AddConfigFunc(integration.Name(), integration.ConfigFunc()); err != nil {
		return err
	}

	return nil
}

// RegisterIntegrations registers multiple integrations at once
func (cl *ConfigLoader) RegisterIntegrations(integrations ...Integration) error {
	for _, integration := range integrations {
		if err := cl.RegisterIntegration(integration); err != nil {
			return err
		}
	}
	return nil
}