import React from 'react';
import clsx from 'clsx';
import { NavLink } from 'react-router-dom';
import { useTranslation } from 'react-i18next';
import { useUIStore } from '@/store/uiStore';

interface NavItem {
  to: string;
  labelKey: string;
  icon: React.ReactNode;
}

const navIcon = (path: string) => (
  <svg className="w-5 h-5" fill="none" viewBox="0 0 24 24" stroke="currentColor" aria-hidden="true">
    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d={path} />
  </svg>
);

const navItems: NavItem[] = [
  { to: '/dashboard', labelKey: 'nav.dashboard', icon: navIcon('M3 12l2-2m0 0l7-7 7 7M5 10v10a1 1 0 001 1h3m10-11l2 2m-2-2v10a1 1 0 01-1 1h-3m-6 0a1 1 0 001-1v-4a1 1 0 011-1h2a1 1 0 011 1v4a1 1 0 001 1m-6 0h6') },
  { to: '/contacts', labelKey: 'nav.contacts', icon: navIcon('M17 20h5v-2a3 3 0 00-5.356-1.857M17 20H7m10 0v-2c0-.656-.126-1.283-.356-1.857M7 20H2v-2a3 3 0 015.356-1.857M7 20v-2c0-.656.126-1.283.356-1.857m0 0a5.002 5.002 0 019.288 0M15 7a3 3 0 11-6 0 3 3 0 016 0zm6-3a2 2 0 11-4 0 2 2 0 014 0zM7 10a2 2 0 11-4 0 2 2 0 014 0z') },
  { to: '/calendar', labelKey: 'nav.calendar', icon: navIcon('M8 7V3m8 4V3m-9 8h10M5 21h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v12a2 2 0 002 2z') },
  { to: '/dms', labelKey: 'nav.files', icon: navIcon('M7 21h10a2 2 0 002-2V9.414a1 1 0 00-.293-.707l-5.414-5.414A1 1 0 0012.586 3H7a2 2 0 00-2 2v14a2 2 0 002 2z') },
  { to: '/mail', labelKey: 'nav.email', icon: navIcon('M3 8l7.89 5.26a2 2 0 002.22 0L21 8M5 19h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v10a2 2 0 002 2z') },
  { to: '/ai-assistant', labelKey: 'nav.aiAssistant', icon: navIcon('M9.75 17L9 20l-1 1h8l-1-1-.75-3M3 13h18M5 17h14a2 2 0 002-2V5a2 2 0 00-2-2H5a2 2 0 00-2 2v10a2 2 0 002 2z') },
];

export function Sidebar() {
  const { t } = useTranslation();
  const { sidebarOpen, setSidebarOpen } = useUIStore();

  return (
    <>
      {sidebarOpen && (
        <div
          className="fixed inset-0 bg-secondary-900/50 z-30 md:hidden"
          onClick={() => setSidebarOpen(false)}
          aria-hidden="true"
          data-testid="sidebar-overlay"
        />
      )}
      <aside
        className={clsx(
          'fixed md:static inset-y-0 left-0 z-40 w-64 bg-secondary-900 text-secondary-300',
          'flex flex-col transition-transform motion-safe:duration-300',
          sidebarOpen ? 'translate-x-0' : '-translate-x-full md:hidden'
        )}
        aria-label="Seitenleiste Navigation"
        data-testid="sidebar"
      >
        <div className="h-16 flex items-center px-6 border-b border-secondary-700">
          <span className="text-xl font-bold text-white">leocrm</span>
        </div>
        <nav className="flex-1 overflow-y-auto py-4" aria-label="Hauptnavigation">
          <ul className="space-y-1 px-3">
            {navItems.map((item) => (
              <li key={item.to}>
                <NavLink
                  to={item.to}
                  className={({ isActive }) =>
                    clsx(
                      'flex items-center gap-3 px-3 py-2.5 rounded-md text-sm font-medium min-h-touch',
                      'motion-safe:transition-colors focus:outline-none focus-visible:ring-2 focus-visible:ring-primary-500',
                      isActive
                        ? 'bg-primary-600 text-white'
                        : 'hover:bg-secondary-800 hover:text-white'
                    )
                  }
                  aria-label={t(item.labelKey)}
                >
                  {item.icon}
                  <span>{t(item.labelKey)}</span>
                </NavLink>
              </li>
            ))}
          </ul>
        </nav>
      </aside>
    </>
  );
}
