import { useEffect, useMemo, useState } from 'react'

import { ROLE_LABELS, ROLE_NAV_ITEMS } from '../config/permissions.js'
import { authRepository } from '../repositories/authRepository.js'
import { profileRepository } from '../repositories/profileRepository.js'
import { BrandLogo } from './Brand.jsx'

// Todos os itens de navegação com seus ícones e metadados
const ALL_NAV_ITEMS = [
  { href: '/inicio', label: 'Painel', icon: 'pulse', activePaths: ['/inicio', '/home', '/dashboard'] },
  { href: '/agenda', label: 'Agenda', icon: 'calendar' },
  { href: '/pacientes', label: 'Pacientes', icon: 'users', exact: true },
  { href: '/prontuario', label: 'Prontuário', icon: 'file' },
  { href: '/laudos', label: 'Relatórios', icon: 'clipboard' },
  {
    href: '/comunicacao',
    label: 'Comunicação',
    icon: 'message',
    activePaths: ['/comunicacao', '/mensagens'],
  },
  { href: '/relatorios', label: 'Analytics', icon: 'chart' },
  { href: '/usuarios', label: 'Usuários', icon: 'shield' },
  { href: '/configuracoes', label: 'Configurações', icon: 'settings', activePaths: ['/configuracoes', '/config'] },
]

const titles = {
  '/inicio': 'Painel',
  '/home': 'Painel',
  '/dashboard': 'Painel',
  '/agenda': 'Agenda',
  '/consultas': 'Consultas',
  '/laudos': 'Relatórios',
  '/pacientes': 'Pacientes',
  '/prontuario': 'Prontuário',
  '/comunicacao': 'Comunicação',
  '/mensagens': 'Comunicação',
  '/relatorios': 'Analytics',
  '/perfil': 'Perfil',
  '/configuracoes': 'Configurações',
  '/config': 'Configurações',
  '/usuarios': 'Usuários',
}

export function AppShell({ children, currentPath, navigate, role, routeTitle }) {
  const [menuOpen, setMenuOpen] = useState(false)
  const [profileMenuOpen, setProfileMenuOpen] = useState(false)
  const [notificationsOpen, setNotificationsOpen] = useState(false)
  const [viewerProfile, setViewerProfile] = useState({ name: 'Usuário', role: 'Usuário do Sistema' })

  const pageTitle = useMemo(() => {
    if (currentPath.startsWith('/pacientes/') && routeTitle) {
      return routeTitle
    }

    return routeTitle || titles[currentPath] || 'MediConnect'
  }, [currentPath, routeTitle])

  // Filtra os itens de navegação com base no role do usuário
  const navItems = useMemo(() => {
    if (!role) return []

    const allowedPaths = ROLE_NAV_ITEMS[role]?.map((item) => item.path) ?? []

    return ALL_NAV_ITEMS.filter((item) =>
      allowedPaths.some(
        (allowed) => item.href === allowed || item.activePaths?.includes(allowed),
      ),
    )
  }, [role])

  const canOpenSettings = useMemo(
    () =>
      (ROLE_NAV_ITEMS[role] ?? []).some(
        (item) => item.path === '/configuracoes' || item.path === '/config',
      ),
    [role],
  )
  const mockNotifications = useMemo(
    () => [
      { id: 'mock-1', title: 'Retorno agendado', detail: 'Paciente Ana Souza às 14:30', time: 'Agora' },
      { id: 'mock-2', title: 'Laudo pendente', detail: 'Hemograma aguardando revisão', time: '12 min' },
      { id: 'mock-3', title: 'Mensagem recebida', detail: 'Resposta via WhatsApp registrada', time: '35 min' },
    ],
    [],
  )

  useEffect(() => {
    let active = true

    profileRepository
      .getCurrentUserProfile()
      .then((profile) => {
        if (!active || !profile) return

        setViewerProfile({
          name: profile.name || 'Usuário',
          role: ROLE_LABELS[role] || profile.role || 'Usuário do Sistema',
        })
      })
      .catch(() => {
        // Fallback: usa o label do role diretamente
        if (active && role) {
          setViewerProfile((prev) => ({
            ...prev,
            role: ROLE_LABELS[role] || 'Usuário do Sistema',
          }))
        }
      })

    return () => {
      active = false
    }
  }, [role])

  useEffect(() => {
    if (!profileMenuOpen && !notificationsOpen) return undefined

    function closeOnEscape(event) {
      if (event.key === 'Escape') {
        setProfileMenuOpen(false)
        setNotificationsOpen(false)
      }
    }

    window.addEventListener('keydown', closeOnEscape)
    return () => window.removeEventListener('keydown', closeOnEscape)
  }, [notificationsOpen, profileMenuOpen])

  function goTo(path) {
    setMenuOpen(false)
    setProfileMenuOpen(false)
    setNotificationsOpen(false)
    navigate(path)
  }

  async function handleLogout() {
    setProfileMenuOpen(false)
    await authRepository.logout()
    navigate('/login', { replace: true })
  }

  return (
    <div className="min-h-screen bg-[#171717] text-[#e5e5e5]">
      <a
        className="sr-only focus:not-sr-only focus:absolute focus:left-4 focus:top-4 focus:z-50 focus:rounded-md focus:bg-[#262626] focus:px-4 focus:py-2 focus:text-sm focus:font-semibold focus:text-[#3b82f6]"
        href="#app-content"
      >
        Pular para conteúdo
      </a>

      <aside
        className={`fixed inset-y-0 left-0 z-40 flex w-56 -translate-x-full flex-col border-r border-[#404040] bg-[#262626] transition-transform duration-200 lg:translate-x-0 ${
          menuOpen ? 'translate-x-0' : ''
        }`}
      >
        <div className="flex h-16 items-center border-b border-[#404040] px-3">
          <BrandLogo
            iconClassName="size-8 rounded-sm"
            markClassName="size-5"
            textClassName="text-xl font-bold leading-7 tracking-[-0.025em] text-[#e5e5e5]"
          />
        </div>

        <nav className="flex-1 overflow-y-auto px-2 pt-4" aria-label="Principal">
          <div className="space-y-1">
            {navItems.map((item) => (
              <NavItem
                active={isActive(currentPath, item)}
                item={item}
                key={`${item.label}-${item.href}`}
                onNavigate={goTo}
              />
            ))}
          </div>
        </nav>

        <div className="p-3">
          <button
            className="w-full rounded-md border border-[#404040] bg-[#303030] px-3 py-2.5 text-left transition hover:border-[#525252] hover:bg-[#333333]"
            onClick={() => goTo('/perfil')}
            type="button"
          >
            <p className="truncate text-xs font-semibold text-[#e5e5e5]">{viewerProfile.name}</p>
            <p className="mt-0.5 truncate text-[11px] leading-4 text-[#a3a3a3]">{viewerProfile.role}</p>
          </button>
        </div>
      </aside>

      {menuOpen ? (
        <button
          aria-label="Fechar menu"
          className="fixed inset-0 z-30 bg-black/50 lg:hidden"
          onClick={() => setMenuOpen(false)}
          type="button"
        />
      ) : null}

      <div className="lg:pl-56">
        <header className="sticky top-0 z-20 h-auto border-b border-[#404040] bg-[#262626] px-4 py-3 md:px-8 lg:h-16 lg:py-0">
          <div className="flex h-full flex-col gap-3 lg:flex-row lg:items-center lg:justify-between">
            <div className="flex min-w-0 items-center gap-3">
              <button
                aria-label="Abrir menu"
                className="rounded-md border border-[#404040] bg-[#303030] px-3 py-2 text-sm font-semibold text-[#e5e5e5] lg:hidden"
                onClick={() => setMenuOpen(true)}
                type="button"
              >
                Menu
              </button>
            </div>

            <div className="flex items-center gap-6">
              <div className="relative z-30">
                <button
                  aria-expanded={notificationsOpen}
                  aria-haspopup="menu"
                  aria-label="Notificações"
                  className="relative grid size-8 place-items-center text-[#a3a3a3] transition hover:text-[#e5e5e5]"
                  onClick={() => {
                    setNotificationsOpen((open) => !open)
                    setProfileMenuOpen(false)
                  }}
                  type="button"
                >
                  <BellIcon className="size-5" />
                  <span className="absolute right-0 top-0 grid size-4 place-items-center rounded-full bg-[#ef4444] text-[10px] font-bold leading-none text-white">
                    {mockNotifications.length}
                  </span>
                </button>

                {notificationsOpen ? (
                  <div
                    aria-label="Notificações mock"
                    className="absolute right-0 top-12 z-30 w-80 rounded-md border border-[#404040] bg-[#262626] p-2 shadow-2xl shadow-black/30"
                    role="menu"
                  >
                    <div className="flex items-center justify-between px-2 py-2">
                      <p className="text-sm font-semibold text-[#e5e5e5]">Notificações</p>
                      <span className="rounded bg-amber-500/15 px-2 py-0.5 text-[10px] font-bold uppercase tracking-[0.08em] text-amber-300">
                        Mock
                      </span>
                    </div>
                    <div className="space-y-1">
                      {mockNotifications.map((notification) => (
                        <button
                          className="w-full rounded-sm border border-transparent px-2 py-2 text-left transition hover:border-[#404040] hover:bg-[#303030]"
                          key={notification.id}
                          role="menuitem"
                          type="button"
                        >
                          <span className="flex items-start justify-between gap-3">
                            <span className="min-w-0">
                              <span className="block text-sm font-semibold text-[#e5e5e5]">{notification.title}</span>
                              <span className="mt-0.5 block text-xs leading-5 text-[#a3a3a3]">{notification.detail}</span>
                            </span>
                            <span className="shrink-0 text-[10px] font-semibold text-[#51a2ff]">{notification.time}</span>
                          </span>
                        </button>
                      ))}
                    </div>
                  </div>
                ) : null}
              </div>

              <span className="hidden h-6 w-px bg-[#404040] sm:block" aria-hidden="true" />

              <div className="relative z-30">
                <button
                  aria-expanded={profileMenuOpen}
                  aria-haspopup="menu"
                  className="flex min-w-0 items-center gap-3 rounded-sm px-1.5 py-1 text-left transition hover:bg-[#303030] focus:outline-none focus:ring-2 focus:ring-[#3b82f6]/40"
                  onClick={() => {
                    setProfileMenuOpen((open) => !open)
                    setNotificationsOpen(false)
                  }}
                  type="button"
                >
                  <span className="grid size-8 shrink-0 place-items-center rounded-full border border-[#3b82f6]/30 bg-[#3b82f6]/15 text-xs font-bold text-[#3b82f6]">
                    {getInitials(viewerProfile.name)}
                  </span>
                  <span className="hidden min-w-0 sm:block">
                    <span className="block max-w-40 truncate text-sm font-semibold leading-4 text-[#e5e5e5]">
                      {viewerProfile.name}
                    </span>
                    <span className="mt-0.5 block max-w-40 truncate text-[11px] font-medium leading-4 text-[#51a2ff]">
                      {viewerProfile.role}
                    </span>
                  </span>
                  <ChevronDownIcon className="hidden size-4 text-[#a3a3a3] sm:block" />
                </button>

                {profileMenuOpen ? (
                  <div
                    aria-label="Menu do usuário"
                    className="absolute right-0 top-12 z-30 w-56 rounded-md border border-[#404040] bg-[#262626] p-1 shadow-2xl shadow-black/30"
                    role="menu"
                  >
                    <button
                      className="flex w-full items-center gap-2 rounded-sm px-3 py-2 text-left text-sm font-medium text-[#e5e5e5] transition hover:bg-[#303030]"
                      onClick={() => goTo('/perfil')}
                      role="menuitem"
                      type="button"
                    >
                      <UserIcon className="size-4 text-[#a3a3a3]" />
                      Ver perfil
                    </button>

                    {canOpenSettings ? (
                      <button
                        className="flex w-full items-center gap-2 rounded-sm px-3 py-2 text-left text-sm font-medium text-[#e5e5e5] transition hover:bg-[#303030]"
                        onClick={() => goTo('/configuracoes')}
                        role="menuitem"
                        type="button"
                      >
                        <AppIcon className="size-4 text-[#a3a3a3]" name="settings" />
                        Configurações
                      </button>
                    ) : null}

                    <div className="my-1 h-px bg-[#404040]" />

                    <button
                      className="flex w-full items-center gap-2 rounded-sm px-3 py-2 text-left text-sm font-medium text-[#f87171] transition hover:bg-[#303030]"
                      onClick={handleLogout}
                      role="menuitem"
                      type="button"
                    >
                      <LogoutIcon className="size-4" />
                      Sair
                    </button>
                  </div>
                ) : null}
              </div>
            </div>
          </div>
        </header>

        <main className="w-full px-4 py-6 md:px-8 md:py-8" id="app-content">
          <div className="sr-only" aria-live="polite">
            {pageTitle}
          </div>
          {children}
        </main>
      </div>
    </div>
  )
}

function NavItem({ active, item, onNavigate }) {
  return (
    <a
      aria-current={active ? 'page' : undefined}
      className={`flex h-9 items-center gap-3 rounded-sm px-2 text-sm font-medium transition ${
        active ? 'bg-[#3b82f6]/10 text-[#3b82f6]' : 'text-[#a3a3a3] hover:bg-[#303030] hover:text-[#e5e5e5]'
      }`}
      href={item.href}
      onClick={(event) => {
        event.preventDefault()
        onNavigate(item.href)
      }}
    >
      <AppIcon className="size-5 shrink-0" name={item.icon} />
      <span>{item.label}</span>
    </a>
  )
}

function isActive(pathname, item) {
  if (item.activePaths?.some((path) => pathname === path || pathname.startsWith(`${path}/`))) {
    return true
  }

  if (item.activePrefixes?.some((path) => pathname.startsWith(path))) {
    return true
  }

  if (item.exact) {
    return pathname === item.href
  }

  return pathname === item.href || pathname.startsWith(`${item.href}/`)
}

function AppIcon({ className = 'size-5', name }) {
  const common = {
    className,
    fill: 'none',
    stroke: 'currentColor',
    strokeLinecap: 'round',
    strokeLinejoin: 'round',
    strokeWidth: 1.8,
    viewBox: '0 0 24 24',
  }

  if (name === 'calendar') {
    return (
      <svg {...common}>
        <path d="M8 3v3M16 3v3M4 9h16M5 5h14a1 1 0 0 1 1 1v13a1 1 0 0 1-1 1H5a1 1 0 0 1-1-1V6a1 1 0 0 1 1-1Z" />
      </svg>
    )
  }

  if (name === 'users') {
    return (
      <svg {...common}>
        <path d="M16 19a4 4 0 0 0-8 0M12 11a4 4 0 1 0 0-8 4 4 0 0 0 0 8ZM20 19a3 3 0 0 0-3-3M4 19a3 3 0 0 1 3-3" />
      </svg>
    )
  }

  if (name === 'file') {
    return (
      <svg {...common}>
        <path d="M7 3h7l4 4v14H7a1 1 0 0 1-1-1V4a1 1 0 0 1 1-1Z" />
        <path d="M14 3v5h5M9 13h6M9 17h6" />
      </svg>
    )
  }

  if (name === 'clipboard') {
    return (
      <svg {...common}>
        <path d="M9 5h6M9 5a3 3 0 0 1 6 0M8 6H6a1 1 0 0 0-1 1v13a1 1 0 0 0 1 1h12a1 1 0 0 0 1-1V7a1 1 0 0 0-1-1h-2M8 13h8M8 17h5" />
      </svg>
    )
  }

  if (name === 'message') {
    return (
      <svg {...common}>
        <path d="M5 5h14v10H8l-4 4V6a1 1 0 0 1 1-1Z" />
      </svg>
    )
  }

  if (name === 'chart') {
    return (
      <svg {...common}>
        <path d="M4 17 9 11l4 4 7-9" />
        <path d="M4 20h16" />
      </svg>
    )
  }

  if (name === 'shield') {
    return (
      <svg {...common}>
        <path d="M12 3 5 6v5c0 4.5 3 8.5 7 10 4-1.5 7-5.5 7-10V6l-7-3Z" />
      </svg>
    )
  }

  if (name === 'settings') {
    return (
      <svg {...common}>
        <path d="M12 3v3M12 18v3M4.9 4.9 7 7M17 17l2.1 2.1M3 12h3M18 12h3M4.9 19.1 7 17M17 7l2.1-2.1" />
        <circle cx="12" cy="12" r="3" />
      </svg>
    )
  }

  return (
    <svg {...common}>
      <path d="M3 12h4l2-5 4 10 2-5h6" />
    </svg>
  )
}

function BellIcon({ className = 'size-5' }) {
  return (
    <svg className={className} fill="none" stroke="currentColor" strokeLinecap="round" strokeLinejoin="round" strokeWidth="1.8" viewBox="0 0 24 24">
      <path d="M18 8a6 6 0 1 0-12 0c0 7-3 7-3 9h18c0-2-3-2-3-9" />
      <path d="M10 21h4" />
    </svg>
  )
}

function UserIcon({ className = 'size-4' }) {
  return (
    <svg className={className} fill="none" stroke="currentColor" strokeLinecap="round" strokeLinejoin="round" strokeWidth="1.8" viewBox="0 0 24 24">
      <path d="M20 21a8 8 0 0 0-16 0" />
      <circle cx="12" cy="7" r="4" />
    </svg>
  )
}

function LogoutIcon({ className = 'size-4' }) {
  return (
    <svg className={className} fill="none" stroke="currentColor" strokeLinecap="round" strokeLinejoin="round" strokeWidth="1.8" viewBox="0 0 24 24">
      <path d="M10 17 15 12l-5-5" />
      <path d="M15 12H3" />
      <path d="M21 3v18" />
    </svg>
  )
}

function ChevronDownIcon({ className = 'size-4' }) {
  return (
    <svg className={className} fill="none" stroke="currentColor" strokeLinecap="round" strokeLinejoin="round" strokeWidth="1.8" viewBox="0 0 24 24">
      <path d="m6 9 6 6 6-6" />
    </svg>
  )
}

function getInitials(name) {
  return String(name || 'US')
    .split(' ')
    .filter(Boolean)
    .slice(0, 2)
    .map((part) => part[0])
    .join('')
    .toUpperCase()
}