package etcdb

import (
	"context"
)

type SingletonSpec[T any] struct {
	Spec Spec
	Key  string
}

func (p SingletonSpec[T]) In(ctx context.Context) Singleton[T] {
	return Singleton[T]{TypedDB[T]{p.Spec.In(ctx), JSONCodec}, p.Key}
}

type Singleton[T any] struct {
	db  TypedDB[T]
	key string
}

func (s Singleton[T]) Get() (v T, ok bool, err error) {
	return s.db.Get(s.key)
}

func (s Singleton[T]) Set(value T) error {
	return s.db.Put(s.key, value)
}