package paypal

import (
	"bytes"
	"encoding/base64"
	"encoding/json"
	"io"
	"net/http"
	"net/url"
)

func GetAccessToken() (error, *AccessToken) {
	return client.AccessToken()
}

func (c *Client) AccessToken() (error, *AccessToken) {
	var (
		err    error
		body   = make(url.Values)
		result AccessToken
	)
	body.Set("grant_type", "client_credentials")
	req, err := http.NewRequest(http.MethodPost, baseurl+accessToken, bytes.NewBufferString(body.Encode()))
	if err != nil {
		return err, nil
	}
	req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
	authEncoded := base64.StdEncoding.EncodeToString([]byte(c.ClientId + ":" + c.ClientSecret))
	req.Header.Set("Authorization", "Basic "+authEncoded)
	client := &http.Client{}
	resp, err := client.Do(req)
	if err != nil {
		return err, nil
	}
	defer resp.Body.Close()
	respBody, err := io.ReadAll(resp.Body)
	if err != nil {
		return err, nil
	}
	err = json.Unmarshal(respBody, &result)
	if err != nil {
		return err, nil
	}
	return nil, &result
}