package main

import (
	"crypto/sha256"
	"errors"
	"fmt"
	"io"
	"mime/multipart"
	"net/http"
	"net/url"
)

type MediaStorage interface {
	Upload(fileName string, file multipart.File) (location string, err error)
}

// BunnyCDN
type BunnyCdnStorage struct {
	// Access Key
	key string
	// Storage zone name
	storageZoneName string
	// Base location
	baseLocation string
}

var bunnyCdnStorageUrl = "https://storage.bunnycdn.com"

func (b BunnyCdnStorage) Upload(fileName string, file multipart.File) (location string, err error) {
	client := &http.Client{}
	req, _ := http.NewRequest("PUT", bunnyCdnStorageUrl+"/"+url.PathEscape(b.storageZoneName)+"/"+url.PathEscape("/"+fileName), file)
	req.Header.Add("AccessKey", b.key)
	resp, err := client.Do(req)
	if err != nil || resp.StatusCode != 201 {
		return "", errors.New("failed to upload file to BunnyCDN")
	}
	return b.baseLocation + fileName, nil
}

func getSHA256(file multipart.File) (filename string, err error) {
	h := sha256.New()
	if _, e := io.Copy(h, file); e != nil {
		err = errors.New("failed to calculate hash of file")
		return
	}
	return fmt.Sprintf("%x", h.Sum(nil)), nil
}