grpc

type BackoffConfig struct {
	// Base Delay
	BaseDelay config.Duration `json:"base_delay" validate:"gte=0" default:"1s"`
	// Max Delay
	MaxDelay config.Duration `json:"max_delay" validate:"gte=0" default:"120s"`
	// Backoff multiplier
	Multiplier float64 `json:"multiplier" validate:"gte=0" default:"1.6"`
	// Jitter
	Jitter float64 `json:"jitter" validate:"gte=0" default:"0.2"`
}

type ClientConnectionBuilder interface {
	AddOptions(opts ...grpc.DialOption) ClientConnectionBuilder
	Build() ClientConnectionWrapper
}

type ClientConnectionWrapper interface {
	// Context can be nil
	Dial(ctx context.Context, target string, extraOptions ...grpc.DialOption) (*grpc.ClientConn, error)
}

type ClientConstructor struct {
	Name          string
	ConfigKey     string
	DefaultConfig GRPCClientConfig
}

type GRPCClientConfig struct {
	// Minimum connection timeout
	MinConnectionTimeout config.Duration `json:"min_connection_timeout" validate:"gte=0" default:"20s"`
	// Client TLS configuration
	ClientTLSConfig tlsconfig.ClientTLSConfig `json:"tls"`
	// Backoff config
	Backoff BackoffConfig `json:"backoff"`
	// Disable ClientTLS
	Insecure bool `json:"insecure" default:"false"`
	// Use HTTP CONNECT Proxy
	UseProxy bool `json:"use_proxy" default:"false"`
}

type GRPCServerConfig struct {
	// Connection timeout
	ConnectionTimeout config.Duration `json:"connection_timeout" validate:"gte=0s" default:"120s"`
	// Enable Reflection
	EnableReflection bool `json:"enable_reflection" default:"false"`
	// Buckets specification in latency histogram
	LatencyBucketsMS []float64 `json:"latency_buckets_ms" validate:"gte=0" default:"[10.0,25.0,100.0,250.0,1000.0]"`
}

type InfoService struct {
	infov1.UnimplementedInfoServiceServer
}

type ServerConstructor struct {
	// Name of grpc server instance -- empty for main server
	Name string
	// Name of listener instance
	ListenerName string
	// Viper config key/server name
	ConfigKey string
	// Default Server Config
	DefaultConfig GRPCServerConfig
	// Additional server Options
	ServerOptions []grpc.ServerOption
}