package web

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"net/http"
)

// GetBody the body from an HTTP GET request as a []byte
func GetBody(url string, format string) ([]byte, error) {
	client := &http.Client{}

	req, err := http.NewRequest("GET", url, nil)

	if format == "json" {
		req.Header.Add("Accept", "application/json")
	} else {
		req.Header.Add("Accept", "text/plain")
	}

	res, err := client.Do(req)
	if err != nil {
		return []byte{}, err
	}
	defer res.Body.Close()

	if res.StatusCode != 200 {
		return []byte{}, fmt.Errorf("Request failed, '%v' received", res.StatusCode)
	}
	response, err := ioutil.ReadAll(res.Body)
	if err != nil {
		return []byte{}, err
	}
	if len(response) == 0 {
		return []byte{}, fmt.Errorf("Empty body received from '%v'", url)
	}

	return response, nil
}

// GetJSON unmarshals the result of an HTTP GET request to an interface{}
func GetJSON(url string, s interface{}) error {
	body, err := GetBody(url, "json")
	if err != nil {
		return err
	}

	err = json.Unmarshal(body, s)
	if err != nil {
		return err
	}

	return nil
}