import { useEffect } from 'react'
import { Routes, Route, NavLink, Navigate, useLocation } from 'react-router-dom'
import Dashboard from './pages/Dashboard'
import Configuration from './pages/Configuration'
import Consultants from './pages/Consultants'
import AssignmentCreate from './pages/AssignmentCreate'
import AssignmentDetail from './pages/AssignmentDetail'
import AssignmentEdit from './pages/AssignmentEdit'
import AssignmentTrash from './pages/AssignmentTrash'
import AssignmentArchive from './pages/AssignmentArchive'
import MeetingHistory from './pages/MeetingHistory'
import MeetingView from './pages/meeting/MeetingView'
import FeedbackDraftPage from './pages/FeedbackDraftPage'
import AssignmentFeedbackPage from './pages/AssignmentFeedbackPage'
import Evaluation from './pages/Evaluation'
import ConsultantDetailPage from './pages/ConsultantDetail'

function headerContext(pathname: string): string {
  if (pathname.startsWith('/config')) return 'Einstellungen'
  if (pathname.startsWith('/consultants')) return 'Personen'
  if (pathname.startsWith('/evaluation') || pathname.startsWith('/feedbacks')) return 'Feedbacks'
  if (pathname.startsWith('/assignments/trash')) return 'Papierkorb'
  if (pathname.startsWith('/assignments/archive')) return 'Archiv'
  if (/\/meeting\//.test(pathname)) return 'Meeting'
  if (/\/history$/.test(pathname)) return 'Gesamtprotokoll'
  if (/\/feedback/.test(pathname)) return 'Feedback'
  if (pathname.startsWith('/assignment')) return 'Assignment'
  return 'Assignments'
}

const NAV = [
  { to: '/', label: 'Assignments', end: true },
  { to: '/feedbacks', label: 'Feedbacks', end: false },
  { to: '/consultants', label: 'Personen', end: false },
  { to: '/config', label: 'Einstellungen', end: false },
] as const

export default function App() {
  const { pathname } = useLocation()
  const wideLayout =
    pathname === '/' ||
    pathname.startsWith('/feedbacks') ||
    pathname.startsWith('/evaluation') ||
    pathname.startsWith('/consultants') ||
    /\/meeting\/|\/history$/.test(pathname)
  const context = headerContext(pathname)

  useEffect(() => {
    document.title = context === 'Assignments'
      ? 'Assignment Monitor'
      : `${context} · Assignment Monitor`
  }, [context])

  return (
    <div className="min-h-dvh bg-app flex flex-col font-sans text-ink">
      <header className="bg-brand text-white px-4 py-3 flex items-center gap-3 shrink-0 shadow-[var(--shadow-header)]">
        <div className="min-w-0 flex-1">
          <div className="font-bold text-lg tracking-tight leading-tight truncate">
            Assignment Monitor
          </div>
          <div className="text-xs text-white/80 mt-0.5 truncate">{context}</div>
        </div>
      </header>

      <main
        className={`flex-1 w-full mx-auto px-4 pt-4 pb-24 ${
          wideLayout ? 'max-w-6xl' : 'max-w-2xl'
        }`}
      >
        <Routes>
          <Route path="/" element={<Dashboard />} />
          <Route path="/assignment/new" element={<AssignmentCreate />} />
          <Route path="/assignments/trash" element={<AssignmentTrash />} />
          <Route path="/assignments/archive" element={<AssignmentArchive />} />
          <Route path="/assignment/:id" element={<AssignmentDetail />} />
          <Route path="/assignment/:id/edit" element={<AssignmentEdit />} />
          <Route path="/assignment/:id/history" element={<MeetingHistory />} />
          <Route path="/assignment/:id/meeting/:meetingId" element={<MeetingView />} />
          <Route path="/assignment/:id/feedback/:instituteeId" element={<AssignmentFeedbackPage />} />
          <Route path="/assignment/:id/feedback-draft/:instituteeId" element={<FeedbackDraftPage />} />
          <Route path="/feedbacks" element={<Evaluation />} />
          <Route path="/evaluation" element={<Navigate to="/feedbacks" replace />} />
          <Route path="/consultants" element={<Consultants />} />
          <Route path="/consultants/:id" element={<ConsultantDetailPage />} />
          <Route path="/config" element={<Configuration />} />
        </Routes>
      </main>

      <nav
        className="fixed bottom-0 inset-x-0 z-20 bg-surface border-t border-line shadow-[var(--shadow-nav)]"
        aria-label="Hauptnavigation"
      >
        <div className={`mx-auto flex justify-around px-1 pt-1 pb-[max(0.35rem,env(safe-area-inset-bottom))] ${
          wideLayout ? 'max-w-6xl' : 'max-w-2xl'
        }`}>
          {NAV.map(({ to, label, end }) => (
            <NavLink
              key={to}
              to={to}
              end={end}
              className={({ isActive }) =>
                [
                  'flex-1 min-h-11 max-w-[7.5rem] mx-0.5 flex items-center justify-center',
                  'rounded-[var(--radius-control)] px-2 text-[11px] sm:text-xs font-medium leading-tight text-center',
                  'transition-colors',
                  isActive
                    ? 'bg-brand-soft text-brand font-semibold'
                    : 'text-ink-muted hover:text-ink hover:bg-app',
                ].join(' ')
              }
            >
              {label}
            </NavLink>
          ))}
        </div>
      </nav>
    </div>
  )
}