package main

import (
	"fmt"
	"io/ioutil"
	"net/http"
	"net/url"
)

// NewError creates an Error based on an expected HTTP status code vs data populated
// from an HTTP response.
//
// This consumes the body of the HTTP response.
func NewError(wantStatusCode int, resp *http.Response) error {
	data, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		return err
	}
	resp.Body.Close()

	loc, err := resp.Location()
	if err != nil {
		loc = resp.Request.URL
	}

	return &Error{
		WantStatus:   wantStatusCode,
		GotStatus:    resp.StatusCode,
		URL:          loc,
		Method:       resp.Request.Method,
		ResponseBody: string(data),
	}
}

// Error is a web response error. Use this when API calls don't work out like you wanted them to.
type Error struct {
	WantStatus, GotStatus int
	URL                   *url.URL
	Method                string
	ResponseBody          string
}

func (e Error) Error() string {
	return fmt.Sprintf("%s %s: wanted status code %d, got: %d: %v", e.Method, e.URL, e.WantStatus, e.GotStatus, e.ResponseBody)
}