/**
 * AppLayout.tsx
 *
 * Shell principal da aplicação: sidebar + header + área de conteúdo.
 * Todas as páginas são renderizadas dentro deste layout via <Outlet />.
 */

import { NavLink, Outlet, useLocation, useNavigate } from 'react-router-dom';
import { useAuth } from '@/context/AuthContext';
import { useTicketEvents } from '@/hooks/useTicketEvents';
import styles from './AppLayout.module.css';


// ─── Ícones inline (SVG) ──────────────────────────────────────────────────────
const Icons = {
  Dashboard: () => (
    <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
      <rect x="3" y="3" width="7" height="7" /><rect x="14" y="3" width="7" height="7" />
      <rect x="3" y="14" width="7" height="7" /><rect x="14" y="14" width="7" height="7" />
    </svg>
  ),
  Plus: () => (
    <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
      <line x1="12" y1="5" x2="12" y2="19" /><line x1="5" y1="12" x2="19" y2="12" />
    </svg>
  ),
  Ticket: () => (
    <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
      <path d="M2 9a3 3 0 0 1 0 6v2a2 2 0 0 0 2 2h16a2 2 0 0 0 2-2v-2a3 3 0 0 1 0-6V7a2 2 0 0 0-2-2H4a2 2 0 0 0-2 2Z" />
    </svg>
  ),
  Logo: () => (
    <svg width="28" height="28" viewBox="0 0 32 32" fill="none" aria-hidden="true">
      <rect width="32" height="32" rx="8" fill="var(--color-accent)" fillOpacity="0.2" />
      <path d="M8 11h16M8 16h10M8 21h12" stroke="var(--color-accent)" strokeWidth="2.2" strokeLinecap="round" />
    </svg>
  ),
  User: () => (
    <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
      <circle cx="12" cy="8" r="4" /><path d="M4 20c0-4 3.6-7 8-7s8 3 8 7" />
    </svg>
  ),
  Users: () => (
    <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
      <path d="M17 21v-2a4 4 0 0 0-4-4H5a4 4 0 0 0-4 4v2" /><circle cx="9" cy="7" r="4" /><path d="M23 21v-2a4 4 0 0 0-3-3.87" /><path d="M16 3.13a4 4 0 0 1 0 7.75" />
    </svg>
  ),
  Settings: () => (
    <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
      <circle cx="12" cy="12" r="3"></circle>
      <path d="M19.4 15a1.65 1.65 0 0 0 .33 1.82l.06.06a2 2 0 0 1 0 2.83 2 2 0 0 1-2.83 0l-.06-.06a1.65 1.65 0 0 0-1.82-.33 1.65 1.65 0 0 0-1 1.51V21a2 2 0 0 1-2 2 2 2 0 0 1-2-2v-.09A1.65 1.65 0 0 0 9 19.4a1.65 1.65 0 0 0-1.82.33l-.06.06a2 2 0 0 1-2.83 0 2 2 0 0 1 0-2.83l.06-.06a1.65 1.65 0 0 0 .33-1.82 1.65 1.65 0 0 0-1.51-1H3a2 2 0 0 1-2-2 2 2 0 0 1 2-2h.09A1.65 1.65 0 0 0 4.6 9a1.65 1.65 0 0 0-.33-1.82l-.06-.06a2 2 0 0 1 0-2.83 2 2 0 0 1 2.83 0l.06.06a1.65 1.65 0 0 0 1.82.33H9a1.65 1.65 0 0 0 1-1.51V3a2 2 0 0 1 2-2 2 2 0 0 1 2 2v.09a1.65 1.65 0 0 0 1 1.51 1.65 1.65 0 0 0 1.82-.33l.06-.06a2 2 0 0 1 2.83 0 2 2 0 0 1 0 2.83l-.06.06a1.65 1.65 0 0 0-.33 1.82V9a1.65 1.65 0 0 0 1.51 1H21a2 2 0 0 1 2 2 2 2 0 0 1-2 2h-.09a1.65 1.65 0 0 0-1.51 1z"></path>
    </svg>
  ),
};

// ─── Mapa de títulos por rota ─────────────────────────────────────────────────
const ROUTE_TITLES: Record<string, string> = {
  '/dashboard':  'Dashboard',
  '/tickets/new': 'Abrir Chamado',
  '/users': 'Usuários',
};

function getPageTitle(pathname: string): string {
  if (ROUTE_TITLES[pathname]) return ROUTE_TITLES[pathname];
  if (pathname.startsWith('/tickets/')) return 'Detalhe do Chamado';
  return 'Helpdesk TI';
}

// ─── Componente ───────────────────────────────────────────────────────────────
export default function AppLayout() {
  const location  = useLocation();
  const navigate  = useNavigate();
  const { user, logout } = useAuth();
  const pageTitle = getPageTitle(location.pathname);

  // Inicializa o listener de eventos em tempo real
  useTicketEvents();

  function handleLogout() {
    logout();
    navigate('/login', { replace: true });
  }


  return (
    <div className={styles.shell}>

      {/* ── Sidebar ─────────────────────────────────────────────────────── */}
      <aside className={styles.sidebar} aria-label="Navegação principal">
        {/* Logo */}
        <div className={styles.sidebarHeader}>
          <Icons.Logo />
          <div>
            <p className={styles.sidebarTitle}>Helpdesk TI</p>
            <p className={styles.sidebarSubtitle}>Central de Chamados</p>
          </div>
        </div>

        {/* Navegação */}
        <nav className={styles.nav}>
          <p className={styles.navLabel}>Menu</p>

          <NavLink
            to="/dashboard"
            className={({ isActive }) =>
              `${styles.navLink} ${isActive ? styles.navLinkActive : ''}`
            }
          >
            <Icons.Dashboard />
            <span>Dashboard</span>
          </NavLink>

          <NavLink
            to="/tickets/new"
            className={({ isActive }) =>
              `${styles.navLink} ${isActive ? styles.navLinkActive : ''}`
            }
          >
            <Icons.Plus />
            <span>Abrir Chamado</span>
          </NavLink>

          <NavLink
            to="/dashboard?status=open"
            className={({ isActive }) =>
              `${styles.navLink} ${isActive ? styles.navLinkActive : ''}`
            }
          >
            <Icons.Ticket />
            <span>Meus Chamados</span>
          </NavLink>

          {user?.role === 'admin' && (
            <>
              <p className={styles.navLabel}>Administração</p>
              <NavLink
                to="/users"
                className={({ isActive }) => `${styles.navLink} ${isActive ? styles.navLinkActive : ''}`}
              >
                <Icons.Users />
                <span>Usuários</span>
              </NavLink>
              <NavLink
                to="/settings"
                className={({ isActive }) => `${styles.navLink} ${isActive ? styles.navLinkActive : ''}`}
              >
                <Icons.Settings />
                <span>Configurações</span>
              </NavLink>
            </>
          )}
        </nav>

        {/* Footer da sidebar */}
        <div className={styles.sidebarFooter}>
          <div className={styles.userAvatar}>
            <Icons.User />
          </div>
          <div className={styles.userInfo}>
            <p className={styles.userName}>{user?.name ?? 'Usuário'}</p>
            <p className={styles.userRole}>{user?.role ?? 'agent'}</p>
          </div>
          <button
            onClick={handleLogout}
            className={styles.logoutBtn}
            title="Sair"
            aria-label="Sair da conta"
          >
            <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
              <path d="M9 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h4" />
              <polyline points="16 17 21 12 16 7" />
              <line x1="21" y1="12" x2="9" y2="12" />
            </svg>
          </button>
        </div>
      </aside>

      {/* ── Área principal ───────────────────────────────────────────────── */}
      <div className={styles.main}>

        {/* Header */}
        <header className={styles.header}>
          <h1 className={styles.pageTitle}>{pageTitle}</h1>
          <div className={styles.headerActions}>
            <NavLink to="/tickets/new" className="btn btn--primary">
              <Icons.Plus />
              Novo Chamado
            </NavLink>
          </div>
        </header>

        {/* Conteúdo da página */}
        <main className={styles.content} id="main-content">
          <Outlet />
        </main>
      </div>
    </div>
  );
}