package storage

import (
	"log"
	"os"

	"git.obamna.ru/erius/ozon-task/graph/model"
	"git.obamna.ru/erius/ozon-task/internal/storage/db"
)

const (
	inMemory = "inmemory"
	postgres = "postgres"
)

var storage = os.Getenv("APP_STORAGE")

type Storage interface {
	AddPost(input *model.PostInput) (*model.AddResult, error)
	AddComment(input *model.CommentInput) (*model.AddResult, error)
	GetPosts() ([]*model.Post, error)
}

func InitStorage() (Storage, error) {
	log.Printf("initializing storage of type %s...", storage)
	switch storage {
	case inMemory:
		return InitInMemory(), nil
	case postgres:
		return db.InitPostgres()
	default:
		log.Printf("storage of type %s doesn't exists, falling back to default in-memory storage", storage)
		return InitInMemory(), nil
	}
}