import { useEffect, useMemo, useState } from 'react';
import { Link, useLocation, useNavigate } from 'react-router-dom';
import './NavigationTabs.css';

const NavigationTabs = ({ isAdmin, onProtectedNavigate, profileName, onLogout }) => {
  const location = useLocation();
  const navigate = useNavigate();
  const [mobileOpen, setMobileOpen] = useState(false);

  const tabs = useMemo(() => {
    const items = [
      { to: '/', label: 'Slots buchen' },
      { to: '/store-watch', label: 'Betriebs-Monitoring' },
      { to: '/journal', label: 'Abhol-Journal' }
    ];
    if (isAdmin) {
      items.push({ to: '/debug', label: 'Debug' });
      items.push({ to: '/admin', label: 'Admin' });
    }
    return items;
  }, [isAdmin]);

  const activeTab = tabs.find((tab) => tab.to === location.pathname) || tabs[0];

  const handleClick = (event, to) => {
    event.preventDefault();
    if (to === location.pathname) {
      return;
    }
    const label = tabs.find((tab) => tab.to === to)?.label || '';
    const proceed = () => navigate(to);
    if (onProtectedNavigate) {
      onProtectedNavigate(`zur Seite "${label}" zu wechseln`, proceed);
      return;
    }
    proceed();
  };

  useEffect(() => {
    setMobileOpen(false);
  }, [location.pathname]);

  const renderLink = (tab, className) => {
    const isActive = location.pathname === tab.to;
    return (
      <Link
        key={tab.to}
        to={tab.to}
        onClick={(event) => handleClick(event, tab.to)}
        className={`${className}${isActive ? ' is-active' : ''}`}
        aria-current={isActive ? 'page' : undefined}
      >
        {tab.label}
      </Link>
    );
  };

  return (
    <nav className="app-navigation" aria-label="Navigation">
      <div className="app-navigation__mobile-header">
        <span className="app-navigation__current-page">{activeTab.label}</span>
        <button
          type="button"
          className="app-navigation__menu-toggle"
          aria-label={mobileOpen ? 'Navigation schließen' : 'Navigation öffnen'}
          aria-expanded={mobileOpen}
          aria-controls="mobile-navigation"
          onClick={() => setMobileOpen((open) => !open)}
        >
          <svg viewBox="0 0 24 24" stroke="currentColor" fill="none" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
            {mobileOpen ? (
              <>
                <line x1="18" y1="6" x2="6" y2="18" />
                <line x1="6" y1="6" x2="18" y2="18" />
              </>
            ) : (
              <>
                <line x1="3" y1="6" x2="21" y2="6" />
                <line x1="3" y1="12" x2="21" y2="12" />
                <line x1="3" y1="18" x2="21" y2="18" />
              </>
            )}
          </svg>
        </button>
      </div>

      {mobileOpen && (
        <div id="mobile-navigation" className="app-navigation__mobile-menu">
          <div className="app-navigation__mobile-links">
            {tabs.map((tab) => renderLink(tab, 'app-navigation__mobile-link'))}
          </div>
          <div className="app-navigation__account">
            <div>
              <span>Angemeldet</span>
              <strong>{profileName || 'Profil'}</strong>
            </div>
            <button type="button" onClick={onLogout}>Logout</button>
          </div>
        </div>
      )}

      <div className="app-navigation__desktop">
        {tabs.map((tab) => renderLink(tab, 'app-navigation__desktop-link'))}
      </div>
    </nav>
  );
};

export default NavigationTabs;