const (
	// DefaultTreeDeleteThreshold is the suggested threshold for tree deletion.
	// It represents the minimum time a tree has to remain Deleted before being hard-deleted.
	DefaultTreeDeleteThreshold = 7 * 24 * time.Hour

	// DefaultTreeDeleteMinInterval is the suggested min interval between tree GC sweeps.
	// A tree GC sweep consists of listing deleted trees older than the deletion threshold and
	// hard-deleting them.
	// Actual runs happen randomly between [minInterval,2*minInterval).
	DefaultTreeDeleteMinInterval = 4 * time.Hour
)

type Main struct {
	// Endpoints for RPC and HTTP servers.
	// HTTP is optional, if empty it'll not be bound.
	RPCEndpoint, HTTPEndpoint string

	// TLS Certificate and Key files for the server.
	TLSCertFile, TLSKeyFile string

	DBClose func() error

	Registry extension.Registry

	StatsPrefix string
	QuotaDryRun bool

	// RegisterServerFn is called to register RPC servers.
	RegisterServerFn func(*grpc.Server, extension.Registry) error

	// IsHealthy will be called whenever "/healthz" is called on the mux.
	// A nil return value from this function will result in a 200-OK response
	// on the /healthz endpoint.
	IsHealthy func(context.Context) error
	// HealthyDeadline is the maximum duration to wait wait for a successful
	// IsHealthy() call.
	HealthyDeadline time.Duration

	// AllowedTreeTypes determines which types of trees may be created through the Admin Server
	// bound by Main. nil means unrestricted.
	AllowedTreeTypes []trillian.TreeType

	TreeGCEnabled         bool
	TreeDeleteThreshold   time.Duration
	TreeDeleteMinInterval time.Duration

	// These will be added to the GRPC server options.
	ExtraOptions []grpc.ServerOption
}