package client

import (
	"fmt"
	"io/ioutil"
	"net/http"
	"strings"

	"github.com/akamai/AkamaiOPEN-edgegrid-golang/jsonhooks-v1"
)

// APIError exposes an Akamai OPEN Edgegrid Error
type APIError struct {
	error
	Type        string         `json:"type"`
	Title       string         `json:"title"`
	Status      int            `json:"status"`
	Detail      string         `json:"detail"`
	Instance    string         `json:"instance"`
	Method      string         `json:"method"`
	ServerIP    string         `json:"serverIp"`
	ClientIP    string         `json:"clientIp"`
	RequestID   string         `json:"requestId"`
	RequestTime string         `json:"requestTime"`
	Response    *http.Response `json:"-"`
	RawBody     string         `json:"-"`
}

func (error APIError) Error() string {
	return strings.TrimSpace(fmt.Sprintf("API Error: %d %s %s More Info %s", error.Status, error.Title, error.Detail, error.Type))
}

// NewAPIError creates a new API error based on a Response,
// or http.Response-like.
func NewAPIError(response *http.Response) APIError {
	// TODO: handle this error
	body, _ := ioutil.ReadAll(response.Body)

	return NewAPIErrorFromBody(response, body)
}

// NewAPIErrorFromBody creates a new API error, allowing you to pass in a body
//
// This function is intended to be used after the body has already been read for
// other purposes.
func NewAPIErrorFromBody(response *http.Response, body []byte) APIError {
	error := APIError{}

	if err := jsonhooks.Unmarshal(body, &error); err == nil {
		error.Status = response.StatusCode
		error.Title = response.Status
	}

	error.Response = response
	error.RawBody = string(body)

	return error
}

// IsInformational determines if a response was informational (1XX status)
func IsInformational(r *http.Response) bool {
	return r.StatusCode > 99 && r.StatusCode < 200
}

// IsSuccess determines if a response was successful (2XX status)
func IsSuccess(r *http.Response) bool {
	return r.StatusCode > 199 && r.StatusCode < 300
}

// IsRedirection determines if a response was a redirect (3XX status)
func IsRedirection(r *http.Response) bool {
	return r.StatusCode > 299 && r.StatusCode < 400
}

// IsClientError determines if a response was a client error (4XX status)
func IsClientError(r *http.Response) bool {
	return r.StatusCode > 399 && r.StatusCode < 500
}

// IsServerError determines if a response was a server error (5XX status)
func IsServerError(r *http.Response) bool {
	return r.StatusCode > 499 && r.StatusCode < 600
}

// IsError determines if the response was a client or server error (4XX or 5XX status)
func IsError(r *http.Response) bool {
	return r.StatusCode > 399 && r.StatusCode < 600
}