package xhttp

import (
	"encoding/json"
	"encoding/xml"
	"net/http"
	"net/url"

	"git.chuangxin1.com/myth/sacred"
)

// Message HTTP response
type Message struct {
	req *http.Request
	res *http.Response

	StatusCode int
	Body       []byte
	Header     http.Header
}

// JSON Body to JSON
func (m Message) JSON(v interface{}) error {
	return json.Unmarshal(m.Body, v)
}

// XML Body to XML
func (m Message) XML(v interface{}) error {
	return xml.Unmarshal(m.Body, v)
}

// Cookies parses and returns the cookies set in the Set-Cookie headers.
func (m Message) Cookies() []*http.Cookie {
	return m.res.Cookies()
}

// Location returns the URL of the response's "Location" header, if present. Relative redirects are resolved relative to the Response's Request. ErrNoLocation is returned if no Location header is present.
func (m Message) Location() (*url.URL, error) {
	return m.res.Location()
}

// UserAgent returns the client's User-Agent, if sent in the request.
func (m Message) UserAgent() string {
	return m.req.UserAgent()
}

// Referer returns the referring URL, if sent in the request.
func (m Message) Referer() string {
	return m.req.Referer()
}

func header(w http.ResponseWriter, contentType string) {
	w.Header().Set(`Content-Type`, contentType)
	w.Header().Set(`X-Powered-By`, sacred.LibName+`/`+sacred.LibVersion)
	w.WriteHeader(http.StatusOK)
}

// SetHeader set http response header
func SetHeader(w http.ResponseWriter, key, value string) {
	w.Header().Set(key, value)
}

// Redirect redirect
func Redirect(w http.ResponseWriter, r *http.Request, url string) {
	//w.Header().Set(`Location`, url)
	//w.WriteHeader(http.StatusFound)

	http.Redirect(w, r, url, http.StatusFound)
}

// WriteJSON response JSON data.
func WriteJSON(w http.ResponseWriter, response interface{}) error {
	header(w, `application/json; charset=utf-8`)
	return json.NewEncoder(w).Encode(response)
}

// WriteXML response XML data.
func WriteXML(w http.ResponseWriter, response interface{}) error {
	header(w, `application/xml; charset=utf-8`)
	return xml.NewEncoder(w).Encode(response)
}

// WriteBytes response bytes
func WriteBytes(w http.ResponseWriter, response interface{}) error {
	header(w, `text/html; charset=utf-8`)
	_, err := w.Write(response.([]byte))
	return err
}