import { useState } from 'react';
import { Link, useNavigate } from 'react-router-dom';
import { useAuthStore } from '@/stores/auth';
import { useUIStore } from '@/stores/ui';
import { useTranslation } from '@/hooks/useTranslation';
import { EmailVerificationBadge } from '@/features/auth/components/EmailVerificationBadge';
import { NotificationMenu } from '@/components/notifications/NotificationMenu';
import { GlobalSearchBar } from '@/components/search/GlobalSearchBar';
import { Button } from '@/components/ui/button';
import { FocusTrap } from '@/components/ui/focus-trap';
import {
  Menu,
  X,
  User,
  Settings,
  LogOut,
  Moon,
  Sun,
  Monitor,
  Search,
} from 'lucide-react';

export function Header() {
  const [isUserMenuOpen, setIsUserMenuOpen] = useState(false);
  const [isMobileSearchOpen, setIsMobileSearchOpen] = useState(false);
  const { user, logout } = useAuthStore();
  const { theme, setTheme, sidebarOpen, setSidebarOpen } = useUIStore();
  const { t } = useTranslation();
  const navigate = useNavigate();

  const handleLogout = async () => {
    await logout();
    navigate('/login');
  };

  const toggleTheme = () => {
    const newTheme =
      theme === 'light' ? 'dark' : theme === 'dark' ? 'system' : 'light';
    setTheme(newTheme);
  };

  const getThemeIcon = () => {
    switch (theme) {
      case 'light':
        return <Sun className="h-4 w-4" />;
      case 'dark':
        return <Moon className="h-4 w-4" />;
      default:
        return <Monitor className="h-4 w-4" />;
    }
  };

  return (
    <header className="sticky top-0 z-50 w-full border-b bg-background/95 backdrop-blur supports-[backdrop-filter]:bg-background/60">
      <div className="container">
        {/* Main header row */}
        <div className="flex h-16 items-center justify-between">
          {/* Logo et menu mobile */}
          <div className="flex items-center space-x-2 sm:space-x-4">
            <Button
              variant="ghost"
              size="icon"
              className="md:hidden"
              onClick={() => setSidebarOpen(!sidebarOpen)}
              aria-label={
                sidebarOpen ? t('navigation.close') : t('navigation.menu')
              }
              aria-expanded={sidebarOpen}
            >
              {sidebarOpen ? (
                <X className="h-5 w-5" />
              ) : (
                <Menu className="h-5 w-5" />
              )}
            </Button>

            <Link to="/dashboard" className="flex items-center space-x-2">
              <div
                className="h-8 w-8 rounded-lg bg-primary flex items-center justify-center"
                aria-hidden="true"
              >
                <span className="text-primary-foreground font-bold text-lg">
                  V
                </span>
              </div>
              <span className="font-bold text-lg sm:text-xl">Veza</span>
            </Link>
          </div>

          {/* Barre de recherche (desktop) */}
          <div className="hidden md:flex flex-1 max-w-md mx-4">
            <GlobalSearchBar className="w-full" />
          </div>

          {/* Mobile search button */}
          <Button
            variant="ghost"
            size="icon"
            className="md:hidden"
            onClick={() => setIsMobileSearchOpen(!isMobileSearchOpen)}
            aria-label={t('common.search')}
            aria-expanded={isMobileSearchOpen}
          >
            <Search className="h-5 w-5" />
          </Button>

          {/* Actions utilisateur */}
          <div className="flex items-center space-x-2">
          {/* Notifications */}
          <NotificationMenu />

          {/* Thème */}
          <Button
            variant="ghost"
            size="icon"
            onClick={toggleTheme}
            aria-label={`${t('common.changeTheme')} - ${theme}`}
          >
            {getThemeIcon()}
          </Button>

          {/* Menu utilisateur */}
          <div className="relative">
            <Button
              variant="ghost"
              size="icon"
              onClick={() => setIsUserMenuOpen(!isUserMenuOpen)}
              aria-label={t('common.userMenu')}
              aria-expanded={isUserMenuOpen}
              aria-haspopup="menu"
            >
              <User className="h-5 w-5" />
            </Button>

            {isUserMenuOpen && (
              <FocusTrap
                active={isUserMenuOpen}
                onEscape={() => setIsUserMenuOpen(false)}
              >
                <div
                  className="absolute right-0 mt-2 w-48 bg-popover border rounded-md shadow-lg z-50"
                  role="menu"
                  aria-orientation="vertical"
                >
                  <div className="p-2">
                    <div className="px-3 py-2 text-sm font-medium text-foreground border-b space-y-2">
                      <div>{user?.username}</div>
                      {/* T0190: Afficher badge si email non vérifié */}
                      {user && !user.is_verified && (
                        <EmailVerificationBadge verified={false} />
                      )}
                    </div>
                    <div className="py-1">
                      <Link
                        to="/profile"
                        className="flex items-center px-3 py-2 text-sm text-foreground hover:bg-accent rounded-sm focus:outline-none focus:ring-2 focus:ring-ring"
                        onClick={() => setIsUserMenuOpen(false)}
                        role="menuitem"
                      >
                        <User className="mr-2 h-4 w-4" aria-hidden="true" />
                        {t('navigation.profile')}
                      </Link>
                      <Link
                        to="/settings"
                        className="flex items-center px-3 py-2 text-sm text-foreground hover:bg-accent rounded-sm focus:outline-none focus:ring-2 focus:ring-ring"
                        onClick={() => setIsUserMenuOpen(false)}
                        role="menuitem"
                      >
                        <Settings className="mr-2 h-4 w-4" aria-hidden="true" />
                        {t('navigation.settings')}
                      </Link>
                      <button
                        onClick={() => {
                          handleLogout();
                          setIsUserMenuOpen(false);
                        }}
                        className="flex items-center w-full px-3 py-2 text-sm text-foreground hover:bg-accent rounded-sm focus:outline-none focus:ring-2 focus:ring-ring"
                        role="menuitem"
                      >
                        <LogOut className="mr-2 h-4 w-4" aria-hidden="true" />
                        {t('common.logout')}
                      </button>
                    </div>
                  </div>
                </div>
              </FocusTrap>
            )}
          </div>
          </div>
        </div>

        {/* Mobile search bar */}
        {isMobileSearchOpen && (
          <div className="md:hidden border-t px-4 py-3">
            <GlobalSearchBar
              className="w-full"
              onSearch={() => setIsMobileSearchOpen(false)}
            />
          </div>
        )}
      </div>
    </header>
  );
}