package main

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

type respStatus struct {
	Status string `json:"status" example:"OK"`
}

type respError struct {
	Error string `json:"error" example:"Descriptive Error message"`
}

// HttpJSONResp will return a JSON response down to the client, setting
// the appropriate content-type header and the status code provided.
// optionally if "logmsg" is not empty it will log that string
func HttpJSONResp(
	w http.ResponseWriter, r *http.Request,
	StatusCode int, logmsg string, data interface{}) {
	w.Header().Add("Content-type", "application/json")
	w.WriteHeader(StatusCode)

	if logmsg != "" {
		Logger.Printf("%s : %s", r.URL.Path, logmsg)
	}

	enc := json.NewEncoder(w)
	err := enc.Encode(data)
	if err != nil {
		Logger.Printf("%s ERROR: %s", r.URL.Path, err)
	}
}

// HttpJSONRespErr just calls HttpJSONResp with a
//    map[string]string{"error": respmsg}
// as the data
func HttpJSONRespErr(
	w http.ResponseWriter, r *http.Request,
	StatusCode int, logmsg, respmsg string) {
	HttpJSONResp(w, r, StatusCode,
		logmsg, &respError{Error: respmsg})
}

// HttpJSONOK simply returns json encoded {"status": "ok"} down to the client
func HttpJSONOK(w http.ResponseWriter, r *http.Request, logmsg string) {
	HttpJSONResp(w, r, http.StatusOK, logmsg, &respStatus{Status: "OK"})
}