import { lazy } from 'react';
import { Routes, Route, Navigate } from 'react-router';
import { AppShell } from '../components/layout/AppShell';
import { ProtectedRoute } from './ProtectedRoute';

// Public (outside the shell)
import { ConnectPage } from '../features/connect/ConnectPage';
import { LoginPage } from '../features/auth/LoginPage';

// Core screens (eager — first paint inside the shell)
import { LibraryPage } from '../features/library/LibraryPage';
import { AlbumDetailPage } from '../features/album-detail/AlbumDetailPage';
import { ArtistDetailPage } from '../features/artist-detail/ArtistDetailPage';
import { PlaylistsPage } from '../features/playlists/PlaylistsPage';
import { PlaylistDetailPage } from '../features/playlist-detail/PlaylistDetailPage';

// Settings / Admin layouts + panels (small, eager)
import { SettingsPage } from '../features/settings/SettingsPage';
import {
  ProfileSettings,
  PlaybackSettings,
  ScrobblingSettings,
  InstanceSettings,
} from '../features/settings/panels';
import { AdminPage } from '../features/admin/AdminPage';
import {
  AdminUsers,
  AdminUserDetail,
  AdminSources,
  AdminInstance,
} from '../features/admin/panels';

import { NotFoundPage } from '../features/not-found/NotFoundPage';

// Secondary screens — lazily loaded (Suspense boundary lives in AppShell)
const SearchDownloadPage = lazy(() =>
  import('../features/search-download/SearchDownloadPage').then((m) => ({
    default: m.SearchDownloadPage,
  })),
);
const DownloadsManagerPage = lazy(() =>
  import('../features/downloads-manager/DownloadsManagerPage').then((m) => ({
    default: m.DownloadsManagerPage,
  })),
);
const UploadPage = lazy(() =>
  import('../features/upload/UploadPage').then((m) => ({ default: m.UploadPage })),
);
const MetadataEditorPage = lazy(() =>
  import('../features/metadata-editor/MetadataEditorPage').then((m) => ({
    default: m.MetadataEditorPage,
  })),
);
const StoragePage = lazy(() =>
  import('../features/storage/StoragePage').then((m) => ({
    default: m.StoragePage,
  })),
);
const StorageMaintenancePage = lazy(() =>
  import('../features/storage/StorageMaintenancePage').then((m) => ({
    default: m.StorageMaintenancePage,
  })),
);
const QueuePage = lazy(() =>
  import('../features/queue/QueuePage').then((m) => ({ default: m.QueuePage })),
);

export function AppRoutes() {
  return (
    <Routes>
      {/* Public */}
      <Route path="/connect" element={<ConnectPage />} />
      <Route path="/login" element={<LoginPage />} />

      {/* Authenticated shell */}
      <Route
        element={
          <ProtectedRoute>
            <AppShell />
          </ProtectedRoute>
        }
      >
        <Route index element={<Navigate to="/library" replace />} />

        {/* Library */}
        <Route path="/library" element={<LibraryPage />} />
        <Route path="/albums/:albumId" element={<AlbumDetailPage />} />
        <Route path="/artists/:artistId" element={<ArtistDetailPage />} />

        {/* Playlists */}
        <Route path="/playlists" element={<PlaylistsPage />} />
        <Route path="/playlists/:playlistId" element={<PlaylistDetailPage />} />

        {/* Discover & downloads (permission-gated) */}
        <Route
          path="/discover"
          element={
            <ProtectedRoute requirePermission="download">
              <SearchDownloadPage />
            </ProtectedRoute>
          }
        />
        <Route
          path="/downloads"
          element={
            <ProtectedRoute requirePermission="download">
              <DownloadsManagerPage />
            </ProtectedRoute>
          }
        />

        {/* Upload & metadata */}
        <Route
          path="/upload"
          element={
            <ProtectedRoute requirePermission="upload">
              <UploadPage />
            </ProtectedRoute>
          }
        />
        <Route
          path="/tracks/:trackId/metadata"
          element={<MetadataEditorPage />}
        />
        <Route path="/metadata/batch" element={<MetadataEditorPage batch />} />

        {/* Storage */}
        <Route path="/storage" element={<StoragePage />} />
        <Route path="/storage/maintenance" element={<StorageMaintenancePage />} />

        {/* Queue (narrow viewports) */}
        <Route path="/queue" element={<QueuePage />} />

        {/* Settings */}
        <Route path="/settings" element={<SettingsPage />}>
          <Route index element={<Navigate to="/settings/profile" replace />} />
          <Route path="profile" element={<ProfileSettings />} />
          <Route path="playback" element={<PlaybackSettings />} />
          <Route path="scrobbling" element={<ScrobblingSettings />} />
          <Route path="instance" element={<InstanceSettings />} />
        </Route>

        {/* Admin (admin-gated) */}
        <Route
          path="/admin"
          element={
            <ProtectedRoute requireAdmin>
              <AdminPage />
            </ProtectedRoute>
          }
        >
          <Route index element={<Navigate to="/admin/users" replace />} />
          <Route path="users" element={<AdminUsers />} />
          <Route path="users/:userId" element={<AdminUserDetail />} />
          <Route path="sources" element={<AdminSources />} />
          <Route path="instance" element={<AdminInstance />} />
        </Route>

        {/* 404 */}
        <Route path="*" element={<NotFoundPage />} />
      </Route>
    </Routes>
  );
}