package main

import (
	"log"
	"net/http"
	"encoding/json"
	"os"
	"github.com/golang-jwt/jwt"
	"time"
)

func GenerateJwt(username string) (string, error) {
	token := jwt.New(jwt.SigningMethodEdDSA)

	claims := token.Claims.(jwt.MapClaims)
	claims["exp"] = time.Now().Add(10 * time.Minute)
	claims["authorized"] = true
	claims["user"] = username

	tokenString, err := token.SignedString(os.Getenv("GREPFOOD_JWT_SECRET"))
	if err != nil {
		return "", err
	}

	return tokenString, nil
}

func WriteJson(w http.ResponseWriter, v any) {
	w.Header().Set("Content-Type", "application/json")

	jsonData, err := json.Marshal(v)
	if err != nil {
	  http.Error(w, err.Error(), http.StatusInternalServerError)
	  return
	}

	w.Write(jsonData)
}

func handleVersion(w http.ResponseWriter, r *http.Request) {
	version := struct {Version string `json:version`} {
		Version: "0.1.0-demo",
	}

	WriteJson(w, version)
}

func main() {

	http.HandleFunc("/version", handleVersion)
	http.Handle("/", http.FileServer(http.Dir("./static")))

	log.Fatal(http.ListenAndServe(os.Getenv("GREPFOOD_SYNCSERVER_PORT"), nil))
}