package endpoints

import (
	"arbeitszeitmessung/models"
	"arbeitszeitmessung/templates"
	"log"
	"net/http"
	"strconv"
	"time"

	"github.com/alexedwards/scs/v2"
)

var Session *scs.SessionManager

func CreateSessionManager(lifetime time.Duration) *scs.SessionManager {
	Session = scs.New()
	Session.Lifetime = lifetime
	return Session
}

func LoginHandler(w http.ResponseWriter, r *http.Request){
	switch r.Method{
		case http.MethodGet: showForm(w, r)
		break
		case http.MethodPost: loginUser(w, r)
		break
		default:
		showForm(w, r)
		break
	}
}

func showForm(w http.ResponseWriter, r *http.Request){
	templates.LoginForm().Render(r.Context(), w)
}

func loginUser(w http.ResponseWriter, r *http.Request){
	err := r.ParseForm()
	if err != nil {
		log.Println("Error parsing form!", err)
		http.Error(w, "Internal error", http.StatusBadRequest)
		return
	}
	_personal_nummer := r.FormValue("personal_nummer")
	if(_personal_nummer == ""){
		log.Println("No personal_nummer provided!")
		http.Error(w, "No personal_nummer provided", http.StatusBadRequest)
		return
	}
	personal_nummer, err := strconv.Atoi(_personal_nummer)
	if(err != nil){
		log.Println("Cannot parse personal nubmer!")
		http.Error(w, "Cannot parse number", http.StatusBadRequest)
		return
	}

	user, err := (*models.User).GetByPersonalNummer(nil, personal_nummer)
	if(err != nil){
		log.Println("No user found under this personal number!")
		http.Error(w, "No user found!", http.StatusNotFound)
	}

	password := r.FormValue("password")
	if(user.Login(password)){
		log.Printf("New succesfull user login from %s %s!\n", user.Vorname, user.Name)
		Session.Put(r.Context(), "user", user.PersonalNummer)
		http.Redirect(w, r, "/time", http.StatusSeeOther) //with this browser always uses GET
	}

showForm(w, r)
}