package main

import (
	"bytes"
	"fmt"
	"io"
	"io/ioutil"
	"log"
	"mime/multipart"
	"net/http"
	"os"
)

func main() {

	domainPrefix := os.Getenv("VEND_DOMAIN_PREFIX")
	productID := os.Getenv("VEND_PRODUCT_ID")    // this wouldn't usually come from an evironment variable
	filePath := os.Getenv("VEND_IMAGE_FILEPATH") // ditto
	token := os.Getenv("VEND_TOKEN")

	var body bytes.Buffer
	writer := multipart.NewWriter(&body)

	file, err := os.Open(filePath)
	if err != nil {
		log.Fatal(err)
	}
	defer file.Close()

	part, err := writer.CreateFormFile("image", filePath)
	if err != nil {
		log.Fatal(err)
	}

	_, err = io.Copy(part, file)
	if err != nil {
		log.Fatal(err)
	}

	err = writer.Close()

	if err != nil {
		log.Fatal(err)
	}

	url := fmt.Sprintf("https://%s.vendhq.com/api/2.0/products/%s/actions/image_upload", domainPrefix, productID)

	req, err := http.NewRequest("POST", url, &body)
	if err != nil {
		log.Fatal(err)
	}

	req.Header.Set("Content-Type", writer.FormDataContentType())
	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token))

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		log.Fatal(err)
	}
	defer res.Body.Close()

	resBody, err := ioutil.ReadAll(res.Body)
	if err != nil {
		log.Fatal(err)
	}

	fmt.Println(string(resBody))
}