import "github.com/lyft/goruntime"

// A Refresher is used to determine when to refresh the runtime
type Refresher interface {
	// @return The directory path to watch for changes.
	// @param runtimePath The root of the runtime path
	// @param appDirPath Any app specific path
	WatchDirectory(runtimePath string, appDirPath string) string

	// @return If the runtime needs to be refreshed
	// @param path The path that triggered the FileSystemOp
	// @param The Filesystem op that happened on the directory returned from WatchDirectory
	ShouldRefresh(path string, op FileSystemOp) bool
}

type IFace interface {
	// @return Snapshot the current snapshot. This reference is safe to use forever, but will grow
	//         stale so should not be stored beyond when it is immediately needed.
	Snapshot() snapshot.IFace

	// Add a channel that will be written to when a new snapshot is available. "1" will be written
	// to the channel as a sentinel.
	// @param callback supplies the callback to add.
	AddUpdateCallback(callback chan<- int)
}

import (
        "github.com/lyft/goruntime/loader"
        "github.com/lyft/gostats"
)

// for full docs on gostats visit https://github.com/lyft/gostats
store := stats.NewDefaultStore()
runtime, err := loader.New2("runtime_path", "runtime_subdirectory", store.Scope("runtime"), &DirectoryRefresher{}, opts ...Option)
if err != nil {
	// Handle error
}

type IFace interface {
	FeatureEnabled(key string, defaultValue uint64) bool

	// Fetch raw runtime data based on key.
	// @param key supplies the key to fetch.
	// @return const std::string& the value or empty string if the key does not exist.
	Get(key string) string

	// Fetch an integer runtime key.
	// @param key supplies the key to fetch.
	// @param defaultValue supplies the value to return if the key does not exist or it does not
	//        contain an integer.
	// @return uint64 the runtime value or the default value.
	GetInteger(key string, defaultValue uint64) uint64

	// Fetch all keys inside the snapshot.
	// @return []string all of the keys.
	Keys() []string

	Entries() map[string]*entry.Entry

	SetEntry(string, *entry.Entry)
}

store := stats.NewDefaultStore()
runtime, err := loader.New2("/runtime", "config", stats.Scope("runtime"), AllowDotFiles)
if err != nil {
	// Handle error
}

s := runtime.Snapshot()
s.Get("file1")
s.Get("more_files.file2")
//Supposed file3 contains an integer, or you want to use a default integer if file3 does not contain one
s.GetInteger("more_files.file3", 8)