import React, { useState, useEffect } from "react";
import { Link } from "react-router-dom";
import { useAuth, logout } from "../auth/AuthProvider";
import "./Navbar.css";
import "@fortawesome/fontawesome-free/css/all.css";

function Navbar() {
  const [click, setClick] = useState(false);
  // eslint-disable-next-line
  const [button, setButton] = useState(true);

  const handleClick = () => setClick(!click);
  const closeMobileMenu = () => setClick(false);

  const showButton = () => {
    if (window.innerWidth <= 960) {
      setButton(false);
    } else {
      setButton(true);
    }
  };

  const [isLoggedIn] = useAuth();

  /* Shows the button after resizing the screen */
  useEffect(() => {
    showButton();
  }, []);
  window.addEventListener("resize", showButton);

  return (
    <>
      <nav className="navbar">
        <div className="navbar-container">
          <Link to="/" className="navbar-logo" onClick={closeMobileMenu}>
            Bachelorarbeit Marco Camenzind{" "}
          </Link>
          <div className="menu-icon" onClick={handleClick}>
            <i className={click ? "fas fa-times" : "fas fa-bars"} />
          </div>
          <ul className={click ? "nav-menu active" : "nav-menu"}>
            <li className="nav-item">
              <Link to="/" className="nav-links" onClick={closeMobileMenu}>
                Startseite
              </Link>
            </li>
            {isLoggedIn && (
              <li className="nav-item">
                <Link
                  to="/study"
                  className="nav-links"
                  onClick={closeMobileMenu}
                >
                  Studie
                </Link>
              </li>
            )}
            <li className="nav-item">
              <Link to="/Ueber" className="nav-links" onClick={closeMobileMenu}>
                Über
              </Link>
            </li>
            <li>
              <Link
                to="/manual"
                className="nav-links"
                onClick={closeMobileMenu}
              >
                Anleitung
              </Link>
            </li>
            {isLoggedIn ? (
              <li className="nav-item">
                <>
                  <Link to="/" className="nav-links" onClick={() => logout()}>
                    Abmelden
                  </Link>
                </>
              </li>
            ) : (
              <>
                <li className="nav-item">
                  <Link
                    to="/login"
                    className="nav-links"
                    onClick={closeMobileMenu}
                  >
                    Anmelden
                  </Link>
                </li>
                <li className="nav-item">
                  <Link
                    to="/register"
                    className="nav-links"
                    onClick={closeMobileMenu}
                  >
                    Registrieren
                  </Link>
                </li>
              </>
            )}
            <li>
              <Link
                to="/login"
                className="nav-links-mobile"
                onClick={closeMobileMenu}
              >
                Anmelden
              </Link>
            </li>
          </ul>
        </div>
      </nav>
    </>
  );
}

export default Navbar;