import { useState } from 'react'
import { DollarSign, CalendarDays, TrendingUp, BarChart3, Wallet, Settings, Menu } from 'lucide-react'
import AuthGate, { useAuth } from './components/AuthGate'
import { UpdateBanner } from './components/UpdateBanner'
import { useVersionCheck } from './hooks/useVersionCheck'
import { can } from './types'
import Weekly from './pages/Weekly'
import Monthly from './pages/Monthly'
import Rolling12Weeks from './pages/Rolling12Weeks'
import Rolling12Months from './pages/Rolling12Months'
import Budgets from './pages/Budgets'
import SettingsPage from './pages/Settings'

type Page = 'weekly' | 'monthly' | 'rolling-weeks' | 'rolling-months' | 'budgets' | 'settings'

const NAV: { id: Page; label: string; icon: React.ElementType; cap?: string }[] = [
  { id: 'weekly',         label: 'Weekly',       icon: CalendarDays },
  { id: 'monthly',        label: 'Monthly',      icon: TrendingUp },
  { id: 'rolling-weeks',  label: '12 Weeks',     icon: BarChart3 },
  { id: 'rolling-months', label: '12 Months',    icon: BarChart3 },
  { id: 'budgets',        label: 'Budgets',      icon: Wallet,   cap: 'budget' },
  { id: 'settings',       label: 'Settings',     icon: Settings, cap: 'settings' },
]

function Shell() {
  const { user } = useAuth()
  const [page, setPage] = useState<Page>('weekly')
  const [menuOpen, setMenuOpen] = useState(false)

  const hotelName = import.meta.env.VITE_HOTEL_NAME || 'Hotel'

  const visibleNav = NAV.filter(n => !n.cap || can(user, n.cap))

  function selectPage(id: Page) {
    setPage(id)
    setMenuOpen(false)
  }

  return (
    <div className={`app-shell${menuOpen ? ' menu-open' : ''}`}>
      <nav className="sidebar">
        <div className="sidebar-logo">
          <DollarSign size={16} strokeWidth={1.75} />
          Wage Costs
        </div>
        <div className="sidebar-nav">
          {visibleNav.map(n => (
            <div
              key={n.id}
              className={`nav-item${page === n.id ? ' active' : ''}`}
              onClick={() => selectPage(n.id)}
            >
              <n.icon size={16} strokeWidth={1.75} />
              {n.label}
            </div>
          ))}
        </div>
        <div style={{ padding: '12px 16px', fontSize: '11px', color: 'rgba(255,255,255,0.3)' }}>
          {hotelName}
        </div>
      </nav>

      {menuOpen && <div className="menu-backdrop" onClick={() => setMenuOpen(false)} />}

      <header className="top-bar">
        <button className="top-bar-burger" onClick={() => setMenuOpen(o => !o)}>
          <Menu size={20} strokeWidth={1.75} />
        </button>
        <DollarSign size={18} strokeWidth={1.75} color="var(--gold)" />
        <span className="top-bar-title">Wage Costs</span>
      </header>

      <main className="content">
        {page === 'weekly'         && <Weekly />}
        {page === 'monthly'        && <Monthly />}
        {page === 'rolling-weeks'  && <Rolling12Weeks />}
        {page === 'rolling-months' && <Rolling12Months />}
        {page === 'budgets'        && <Budgets />}
        {page === 'settings'       && <SettingsPage />}
      </main>
    </div>
  )
}

export default function App() {
  const updateAvailable = useVersionCheck('/wages/health')
  return (
    <>
      <AuthGate>
        <Shell />
      </AuthGate>
      <UpdateBanner visible={updateAvailable} />
    </>
  )
}