'use client';

import { useRouter, usePathname } from 'next/navigation';
import { useState } from 'react';
import Image from 'next/image';
import Link from 'next/link';
import useSWR from 'swr';

interface User {
  id: string;
  email: string;
  name: string | null;
  roleId?: string | null;
}

interface DashboardLayoutProps {
  user: User;
  children: React.ReactNode;
}

interface NavItem {
  label: string;
  href: string;
  icon: React.ReactNode;
}

const fetcher = (url: string) => fetch(url).then((res) => res.json());

export default function DashboardLayout({ user, children }: DashboardLayoutProps) {
  const router = useRouter();
  const pathname = usePathname();
  const [loading, setLoading] = useState(false);
  const [showNotifications, setShowNotifications] = useState(false);
  const [showProfileMenu, setShowProfileMenu] = useState(false);

  // Récupérer les conversations pour compter les messages non lus
  const { data: conversations } = useSWR<Array<{ unreadCount: number }>>(
    '/api/conversations',
    fetcher,
    {
      refreshInterval: 3000, // Rafraîchir toutes les 3 secondes
    }
  );

  // Récupérer les notifications
  const { data: notificationsData, mutate: mutateNotifications } = useSWR<{
    notifications: Array<{
      id: string;
      type: string;
      title: string;
      message: string;
      read: boolean;
      link: string | null;
      createdAt: string;
    }>;
    unreadCount: number;
  }>(
    '/api/notifications',
    fetcher,
    {
      refreshInterval: 3000, // Rafraîchir toutes les 3 secondes
    }
  );

  const notifications = notificationsData?.notifications || [];
  const unreadNotificationsCount = notificationsData?.unreadCount || 0;

  // Récupérer les pages accessibles pour l'utilisateur
  const { data: userPagesData } = useSWR<{ pages: string[] }>(
    '/api/user/pages',
    fetcher
  );

  const accessiblePages = userPagesData?.pages || [];

  // Calculer le nombre total de messages non lus
  const totalUnreadCount = Array.isArray(conversations) 
    ? conversations.reduce((sum, conv) => sum + (conv.unreadCount || 0), 0) 
    : 0;

  const getUserInitials = () => {
    if (user.name) {
      const names = user.name.split(' ');
      if (names.length >= 2) {
        return `${names[0].charAt(0)}${names[1].charAt(0)}`.toUpperCase();
      }
      return user.name.charAt(0).toUpperCase();
    }
    return user.email.charAt(0).toUpperCase();
  };

  const navItems: NavItem[] = [
    {
      label: 'Tableau de Board',
      href: '/dashboard',
      icon: (
        <svg className="w-6 h-6" fill="currentColor" viewBox="0 0 20 20">
          <path d="M2 4a1 1 0 011-1h2a1 1 0 011 1v12a1 1 0 01-1 1H3a1 1 0 01-1-1V4zM8 4a1 1 0 011-1h2a1 1 0 011 1v12a1 1 0 01-1 1H9a1 1 0 01-1-1V4zM15 3a1 1 0 00-1 1v12a1 1 0 001 1h2a1 1 0 001-1V4a1 1 0 00-1-1h-2z" />
        </svg>
      ),
    },
    {
      label: 'Calendrier',
      href: '/dashboard/calendrier',
      icon: (
        <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M8 7V3m8 4V3m-9 8h10M5 21h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v12a2 2 0 002 2z" />
        </svg>
      ),
    },
    {
      label: 'Chauffeurs',
      href: '/dashboard/chauffeurs',
      icon: (
        <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 17a2 2 0 11-4 0 2 2 0 014 0zM19 17a2 2 0 11-4 0 2 2 0 014 0z" />
          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M13 16V6a1 1 0 00-1-1H4a1 1 0 00-1 1v10a1 1 0 001 1h1m8-1a1 1 0 01-1 1H9m4-1V8a1 1 0 011-1h2.586a1 1 0 01.707.293l3.414 3.414a1 1 0 01.293.707V16a1 1 0 01-1 1h-1m-6-1a1 1 0 001 1h1M5 17a2 2 0 104 0m-4 0a2 2 0 114 0m6 0a2 2 0 104 0m-4 0a2 2 0 114 0" />
        </svg>
      ),
    },
    {
      label: 'Adhérents',
      href: '/dashboard/adherents',
      icon: (
        <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 4.354a4 4 0 110 5.292M15 21H3v-1a6 6 0 0112 0v1zm0 0h6v-1a6 6 0 00-9-5.197M13 7a4 4 0 11-8 0 4 4 0 018 0z" />
        </svg>
      ),
    },
    {
      label: 'Univers Pro',
      href: '/dashboard/univers-pro',
      icon: (
        <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M21 13.255A23.931 23.931 0 0112 15c-3.183 0-6.22-.62-9-1.745M16 6V4a2 2 0 00-2-2h-4a2 2 0 00-2 2v2m4 6h.01M5 20h14a2 2 0 002-2V8a2 2 0 00-2-2H5a2 2 0 00-2 2v10a2 2 0 002 2z" />
        </svg>
      ),
    },
    {
      label: 'Messagerie',
      href: '/dashboard/messagerie',
      icon: (
        <div className="relative">
          <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M8 12h.01M12 12h.01M16 12h.01M21 12c0 4.418-4.03 8-9 8a9.863 9.863 0 01-4.255-.949L3 20l1.395-3.72C3.512 15.042 3 13.574 3 12c0-4.418 4.03-8 9-8s9 3.582 9 8z" />
          </svg>
        </div>
      ),
    },
    {
      label: 'Factures',
      href: '/dashboard/factures',
      icon: (
        <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
        </svg>
      ),
    },
    {
      label: 'Archives',
      href: '/dashboard/archives',
      icon: (
        <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M5 8h14M5 8a2 2 0 110-4h14a2 2 0 110 4M5 8v10a2 2 0 002 2h10a2 2 0 002-2V8m-9 4h4" />
        </svg>
      ),
    },
  ];

  const handleLogout = async () => {
    setLoading(true);
    try {
      await fetch('/api/auth/logout', { method: 'POST' });
      router.push('/login');
      router.refresh();
    } catch (error) {
      console.error('Logout error:', error);
    } finally {
      setLoading(false);
    }
  };

  return (
    <div className="min-h-screen bg-cwhite flex">
      {/* Sidebar */}
      <aside className="w-64 bg-white flex flex-col h-screen sticky top-0 border-r border-gray-200">
        {/* Logo Section */}
        <div className="py-5 m-auto">
          <div className="flex items-center gap-3">
            <Image
              src="/logo.svg"
              alt="MAD Logo"
              width={32}
              height={32}
            />
            <div className="flex items-center gap-2">
              <span className="font-semibold text-gray-900">Association MAD</span>
            </div>
          </div>
        </div>

        {/* Navigation */}
        <nav className="flex-1 p-4 border-t border-gray-200">
          <ul className="space-y-1">
            {navItems.map((item) => {
              const isActive = pathname === item.href;
              const isMessagerie = item.href === '/dashboard/messagerie';
              const showBadge = isMessagerie && totalUnreadCount > 0;
              
              // Vérifier si l'utilisateur a accès à cette page
              // Si accessiblePages est vide (chargement), afficher tous les liens
              // Sinon, vérifier si la page est dans la liste
              const hasAccess = accessiblePages.length === 0 || accessiblePages.includes(item.href);
              
              if (!hasAccess) {
                return null;
              }
              
              return (
                <li key={item.href}>
                  <Link
                    href={item.href}
                    className={`flex items-center gap-3 px-4 py-3 rounded-lg transition-colors relative ${
                      isActive
                        ? 'bg-lblue text-white'
                        : 'text-gray-700 hover:bg-lblue/10'
                    }`}
                  >
                    <span className={isActive ? 'text-white' : 'text-lblue'}>{item.icon}</span>
                    <span className={`text-sm font-medium flex-1 ${isActive ? '' : ''}`}>
                      {item.label}
                    </span>
                    {showBadge && (
                      <span className="absolute top-2 right-2 w-5 h-5 bg-red-500 text-white text-xs font-semibold rounded-full flex items-center justify-center">
                        {totalUnreadCount > 99 ? '99+' : totalUnreadCount}
                      </span>
                    )}
                  </Link>
                </li>
              );
            })}
          </ul>
        </nav>

        {/* Footer */}
        <div className="p-6 border-t border-gray-200">
          <p className="text-xs text-gray-500 text-center">
            © {new Date().getFullYear()} MAD - <a href="https://legouix.dev" target="_blank" className="text-lblue hover:text-dblue">Propulsé par LGX</a>
          </p>
        </div>
      </aside>

      {/* Main Content Area */}
      <div className="flex-1 flex flex-col">
        {/* Top Navbar */}
        <header className="bg-white border-b border-gray-200 px-6 py-4">
          <div className="flex items-center justify-between">
            <h1 className="text-xl font-semibold text-gray-900"></h1>
            <div className="flex items-center gap-3">
              {/* Notification Button */}
              <div className="relative">
                <button
                  onClick={() => setShowNotifications(!showNotifications)}
                  className="relative w-10 h-10 rounded-lg bg-gray-50 hover:bg-gray-100 border border-gray-200 flex items-center justify-center transition-all duration-200 hover:shadow-sm group"
                >
                  <svg className="w-5 h-5 text-gray-600 group-hover:text-gray-900 transition-colors" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 17h5l-1.405-1.405A2.032 2.032 0 0118 14.158V11a6.002 6.002 0 00-4-5.659V5a2 2 0 10-4 0v.341C7.67 6.165 6 8.388 6 11v3.159c0 .538-.214 1.055-.595 1.436L4 17h5m6 0v1a3 3 0 11-6 0v-1m6 0H9" />
                  </svg>
                  {/* Badge de notification */}
                  {unreadNotificationsCount > 0 && (
                    <span className="absolute -top-1 -right-1 min-w-[18px] h-[18px] bg-red-500 text-white text-[10px] font-semibold rounded-full border-2 border-white flex items-center justify-center px-1">
                      {unreadNotificationsCount > 99 ? '99+' : unreadNotificationsCount}
                    </span>
                  )}
                </button>

                {/* Dropdown Notifications */}
                {showNotifications && (
                  <div className="absolute right-0 top-12 w-80 bg-white rounded-lg shadow-xl border border-gray-200 z-50 animate-slideUp">
                    <div className="p-4 border-b border-gray-200 flex items-center justify-between">
                      <h3 className="text-sm font-semibold text-gray-900">Notifications</h3>
                      {unreadNotificationsCount > 0 && (
                        <button
                          onClick={async () => {
                            try {
                              await fetch('/api/notifications', {
                                method: 'POST',
                                headers: {
                                  'Content-Type': 'application/json',
                                },
                                body: JSON.stringify({ markAllAsRead: true }),
                              });
                              mutateNotifications();
                            } catch (error) {
                              console.error('Erreur lors du marquage des notifications:', error);
                            }
                          }}
                          className="text-xs text-lblue hover:text-dblue font-medium"
                        >
                          Tout marquer comme lu
                        </button>
                      )}
                    </div>
                    <div className="max-h-96 overflow-y-auto">
                      {notifications.length === 0 ? (
                        <div className="p-4 text-center text-sm text-gray-500">
                          Aucune notification
                        </div>
                      ) : (
                        <div className="divide-y divide-gray-100">
                          {notifications.map((notification) => (
                            <button
                              key={notification.id}
                              onClick={async () => {
                                // Marquer comme lue
                                if (!notification.read) {
                                  try {
                                    await fetch('/api/notifications', {
                                      method: 'POST',
                                      headers: {
                                        'Content-Type': 'application/json',
                                      },
                                      body: JSON.stringify({ notificationId: notification.id }),
                                    });
                                    mutateNotifications();
                                  } catch (error) {
                                    console.error('Erreur lors du marquage de la notification:', error);
                                  }
                                }
                                // Naviguer vers le lien si disponible
                                if (notification.link) {
                                  router.push(notification.link);
                                  setShowNotifications(false);
                                }
                              }}
                              className={`w-full text-left p-4 hover:bg-gray-50 transition-colors ${
                                !notification.read ? 'bg-blue-50/50' : ''
                              }`}
                            >
                              <div className="flex items-start gap-3">
                                <div className={`flex-shrink-0 w-2 h-2 rounded-full mt-2 ${
                                  !notification.read ? 'bg-lblue' : 'bg-transparent'
                                }`}></div>
                                <div className="flex-1 min-w-0">
                                  <div className="flex items-center justify-between mb-1">
                                    <p className={`text-sm font-medium ${
                                      !notification.read ? 'text-gray-900' : 'text-gray-700'
                                    }`}>
                                      {notification.title}
                                    </p>
                                    <span className="text-xs text-gray-400 ml-2 flex-shrink-0">
                                      {new Date(notification.createdAt).toLocaleDateString('fr-FR', {
                                        day: 'numeric',
                                        month: 'short',
                                        hour: '2-digit',
                                        minute: '2-digit',
                                      })}
                                    </span>
                                  </div>
                                  <p className="text-xs text-gray-600 line-clamp-2">
                                    {notification.message}
                                  </p>
                                </div>
                              </div>
                            </button>
                          ))}
                        </div>
                      )}
                    </div>
                  </div>
                )}
              </div>

              {/* Profile Avatar */}
              <div className="relative">
                <button
                  onClick={() => setShowProfileMenu(!showProfileMenu)}
                  className="flex items-center gap-3 px-3 py-2 rounded-lg hover:bg-gray-50 border border-gray-200 transition-all duration-200 hover:shadow-sm group"
                >
                  <div className="w-9 h-9 rounded-lg bg-gradient-to-br from-lblue to-dblue flex items-center justify-center shadow-sm">
                    <span className="text-white text-sm font-semibold">{getUserInitials()}</span>
                  </div>
                  <div className="hidden md:block text-left">
                    <div className="text-sm font-medium text-gray-900">{user.name || 'Utilisateur'}</div>
                    <div className="text-xs text-gray-500">{user.email}</div>
                  </div>
                  <svg className="w-4 h-4 text-gray-400 group-hover:text-gray-600 transition-colors" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M19 9l-7 7-7-7" />
                  </svg>
                </button>

                {/* Dropdown Profile Menu */}
                {showProfileMenu && (
                  <div className="absolute right-0 top-14 w-56 bg-white rounded-lg shadow-xl border border-gray-200 z-50 animate-slideUp">
                    <div className="p-4 border-b border-gray-200">
                      <div className="text-sm font-medium text-gray-900">{user.name || 'Utilisateur'}</div>
                      <div className="text-xs text-gray-500 mt-1">{user.email}</div>
                    </div>
                    <div className="p-2">
                      <button
                        onClick={() => {
                          setShowProfileMenu(false);
                          router.push('/dashboard/parametres');
                        }}
                        className="w-full px-3 py-2 text-left text-sm text-gray-700 hover:bg-gray-50 rounded-lg transition-colors flex items-center gap-2"
                      >
                        <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M10.325 4.317c.426-1.756 2.924-1.756 3.35 0a1.724 1.724 0 002.573 1.066c1.543-.94 3.31.826 2.37 2.37a1.724 1.724 0 001.065 2.572c1.756.426 1.756 2.924 0 3.35a1.724 1.724 0 00-1.066 2.573c.94 1.543-.826 3.31-2.37 2.37a1.724 1.724 0 00-2.572 1.065c-.426 1.756-2.924 1.756-3.35 0a1.724 1.724 0 00-2.573-1.066c-1.543.94-3.31-.826-2.37-2.37a1.724 1.724 0 00-1.065-2.572c-1.756-.426-1.756-2.924 0-3.35a1.724 1.724 0 001.066-2.573c-.94-1.543.826-3.31 2.37-2.37.996.608 2.296.07 2.572-1.065z" />
                          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
                        </svg>
                        Paramètres
                      </button>
                      <div className="border-t border-gray-200 my-1"></div>
                      <button
                        onClick={handleLogout}
                        disabled={loading}
                        className="w-full px-3 py-2 text-left text-sm text-red-600 hover:bg-red-50 rounded-lg transition-colors flex items-center gap-2 disabled:opacity-50"
                      >
                        <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M17 16l4-4m0 0l-4-4m4 4H7m6 4v1a3 3 0 01-3 3H6a3 3 0 01-3-3V7a3 3 0 013-3h4a3 3 0 013 3v1" />
                        </svg>
                        Déconnexion
                      </button>
                    </div>
                  </div>
                )}
              </div>
            </div>
          </div>
        </header>

        {/* Page Content */}
        <main className="flex-1 overflow-auto">
          {children}
        </main>
      </div>

      {/* Overlay pour fermer les menus */}
      {(showNotifications || showProfileMenu) && (
        <div
          className="fixed inset-0 z-40"
          onClick={() => {
            setShowNotifications(false);
            setShowProfileMenu(false);
          }}
        />
      )}
    </div>
  );
}