// Discordgo - Discord bindings for Go
// Available at https://github.com/bwmarrin/discordgo

// Copyright 2015-2016 Bruce Marriner <bruce@sqls.net>.  All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// This file contains custom types, currently only a timestamp wrapper.

package discordgo

import (
	"encoding/json"
	"net/http"
)

// RESTError stores error information about a request with a bad response code.
// Message is not always present, there are cases where api calls can fail
// without returning a json message.
type RESTError struct {
	Request      *http.Request
	Response     *http.Response
	ResponseBody []byte

	Message *APIErrorMessage // Message may be nil.
}

func newRestError(req *http.Request, resp *http.Response, body []byte) *RESTError {
	restErr := &RESTError{
		Request:      req,
		Response:     resp,
		ResponseBody: body,
	}

	// Attempt to decode the error and assume no message was provided if it fails
	var msg *APIErrorMessage
	err := json.Unmarshal(body, &msg)
	if err == nil {
		restErr.Message = msg
	}

	return restErr
}

func (r RESTError) Error() string {
	return "HTTP " + r.Response.Status + ", " + string(r.ResponseBody)
}