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package main

import (
	"encoding/base64"
	"encoding/json"
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
	"net/url"
	"strconv"
	"strings"
)

func main() {
	data := url.Values{}
	data.Set("grant_type", "client_credentials")

	authentication := base64.StdEncoding.EncodeToString([]byte(config.Id + ":" + config.Secret))
	// Buffer.from(`${id}:${secret}`).toString("base64")

	resp, err := http.NewRequest("POST", "https://api-m.sandbox.paypal.com/v1/oauth2/token", (strings.NewReader(data.Encode())))
	// http.Post("https://api-m.sandbox.paypal.com/v1/oauth2/token", "application/x-www-form-urlencoded", strings.NewReader(data))
	if err != nil {
		log.Printf("Request Failed: %s", err)
		// return ""
	}
	resp.Header.Add("Content-Type", "application/x-www-form-urlencoded")
	resp.Header.Add("Content-Length", strconv.Itoa(len(data.Encode())))
	resp.Header.Add("Authorization", "Basic "+authentication)
	defer resp.Body.Close()
	// first try
	respBody, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		fmt.Println("someErr:", err)
	}
	fmt.Println(string(respBody)) // returns grant_type=client_credentials
	resJSon, err := json.Marshal(respBody)
	var info []interface{}

	json.Unmarshal([]byte(respBody), &info)

	fmt.Println(string(resJSon), info) // returns "Z3Jh..." and info = [] empty
	// second try
		var res interface{}

	var someErr = json.NewDecoder(resp.Body).Decode(&res)
	if someErr != nil {
		fmt.Println("someErr:", err)
	}
	fmt.Println("-------------------", res) // returns <nil>

}