// Copyright 2020-2021 InfluxData, Inc. All rights reserved.
// Use of this source code is governed by MIT
// license that can be found in the LICENSE file.

package http

import (
	"fmt"
	"strconv"
)

// Error represent error response from InfluxDBServer or http error
type Error struct {
	StatusCode int
	Code       string
	Message    string
	Err        error
	RetryAfter uint
}

// Error fulfils error interface
func (e *Error) Error() string {
	switch {
	case e.Err != nil:
		return e.Err.Error()
	case e.Code != "" && e.Message != "":
		return fmt.Sprintf("%s: %s", e.Code, e.Message)
	default:
		return "Unexpected status code " + strconv.Itoa(e.StatusCode)
	}
}

func (e *Error) Unwrap() error {
	if e.Err != nil {
		return e.Err
	}
	return nil
}

// NewError returns newly created Error initialised with nested error and default values
func NewError(err error) *Error {
	return &Error{
		StatusCode: 0,
		Code:       "",
		Message:    "",
		Err:        err,
		RetryAfter: 0,
	}
}