package main

import (
	"embed"
	"fmt"
	"io/fs"
	"log"
	"net/http"
)

//go:embed build/frontend/public
var frontendEmbed embed.FS

func init() {
	router.HandleFunc("/api/version", version)
	router.HandleFunc("/api/registration", registration).Methods("POST")

	// frontend must come last to make sure /api takes precedence
	frontend, err := fs.Sub(frontendEmbed, "build/frontend/public")
	if err != nil {
		log.Fatalf("No embedded frontend: %v.", err)
	}
	router.PathPrefix("/").Handler(http.FileServerFS(frontend))
}

func version(w http.ResponseWriter, r *http.Request) {
	fmt.Fprint(w, versionTxt)
}

func registration(w http.ResponseWriter, r *http.Request) {
	token, err := NewToken()
	if err != nil {
		http.Error(w, "Failed to generate token.", http.StatusInternalServerError)
		return
	}

	cookie := http.Cookie{
		Name: "token",
		Value: token.Private(),
		HttpOnly: true,
		Secure: true,
		SameSite: http.SameSiteStrictMode,
	}

	http.SetCookie(w, &cookie)

	fmt.Fprintf(w, "%s\n", token.Public())
}