package image

import (
	"io/ioutil"
	"log"
	"path"
	"time"

	"github.com/matoous/go-nanoid"
)

// Servicer image management
type Servicer interface {
	NewID() (string, error)
	AddFile(filename string, fileBytes []byte) error
}

// NewService new image service
func NewService(repo Repo, storagePath string) *Service {
	return &Service{repo,
		storagePath,
	}
}

// Service a container for working with images
type Service struct {
	db          Repo
	storagePath string
}

// NewID create an uniqueish ID
func (is *Service) NewID() (string, error) {
	return gonanoid.Nanoid()
}

// AddFile writes to disk, writes meta to db
func (is *Service) AddFile(fileName string, fileBytes []byte) error {
	filePath := path.Join(is.storagePath, fileName)
	if err := ioutil.WriteFile(filePath, fileBytes, 0750); err != nil {
		log.Fatal(err)
		return err
	}
	t := time.Now().UTC()
	postMeta := &PostMeta{
		FilePath:  fileName,
		CreatedAt: t.Format(time.RFC3339),
		UserID:    "1",
	}
	is.db.AddNewFile(fileName, postMeta, 946080000)
	if err := is.db.AddNewFile(fileName, postMeta, 946080000); err != nil {
		log.Fatal(err)
		return err
	}
	return nil
}