import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';
import 'package:sentry_flutter/sentry_flutter.dart';

import '../viewmodels/admin_pin_view_model.dart';
import '../viewmodels/pin_lock_view_model.dart';
import '../views/admin_screen_view.dart';
import '../views/bar_screen_view.dart';
import '../views/dev_menu_view.dart';
import '../views/error_screen_view.dart';
import '../views/history_screen_view.dart';
import '../views/import_names_view.dart';
import '../views/pin_lock_view.dart';
import '../views/product_form_view.dart';
import '../views/product_list_view.dart';
import '../views/settings_view.dart';
import '../views/update_progress_view.dart';
import '../utils/app_update_util.dart';

final RouteObserver<PageRoute> routeObserver = RouteObserver<PageRoute>();

GoRouter createAppRouter(
  PinLockViewModel pinLockViewModel, {
  required AdminPinViewModel adminPinViewModel,
}) {
  return GoRouter(
    initialLocation: '/bar',
    observers: [routeObserver, SentryNavigatorObserver()],
    refreshListenable: Listenable.merge([pinLockViewModel, adminPinViewModel]),
    redirect: (context, state) {
      if (!pinLockViewModel.hasLoaded || !adminPinViewModel.hasLoaded) {
        return null;
      }

      final needsPinSetup =
          !pinLockViewModel.isPinSet && pinLockViewModel.pinRequired;
      final isLocked =
          pinLockViewModel.isPinSet &&
          !pinLockViewModel.isUnlocked &&
          pinLockViewModel.pinRequired;
      final mustBeOnLock = needsPinSetup || isLocked;

      final location = state.uri.path;
      final goingToLock = location == '/lock';
      final goingToAdminLock = location == '/admin/lock';
      final isAdminArea =
          location == '/admin' ||
          location.startsWith('/admin/') ||
          location == '/products' ||
          location.startsWith('/products/');

      if (mustBeOnLock && !goingToLock) return '/lock';
      if (!mustBeOnLock && goingToLock) return '/bar';

      if (isAdminArea && !goingToAdminLock && !adminPinViewModel.isUnlocked) {
        return '/admin/lock';
      }

      if (goingToAdminLock && adminPinViewModel.isUnlocked) return '/admin';

      return null;
    },
    routes: [
      GoRoute(path: '/', redirect: (context, state) => '/bar'),
      GoRoute(
        path: '/lock',
        builder: (context, state) => PinEntryView(
          mode: pinLockViewModel.isPinSet
              ? PinEntryMode.unlock
              : PinEntryMode.create,
          onSuccess: () {
            context.go("/bar");
          },
        ),
      ),

      GoRoute(path: '/bar', builder: (context, state) => const BarScreenView()),

      GoRoute(
        path: '/admin/lock',
        builder: (context, state) => PinEntryView(
          mode: adminPinViewModel.isPinSet
              ? PinEntryMode.unlock
              : PinEntryMode.create,
          isAdmin: true,
          onVerify: adminPinViewModel.verify,
          onSet: adminPinViewModel.setPin,
          errorMessage: () => adminPinViewModel.errorMessage,
          onSuccess: () => context.go('/admin'),
        ),
      ),

      GoRoute(
        path: '/admin',
        builder: (context, state) => const AdminScreenView(),
        routes: [
          GoRoute(
            path: 'import',
            builder: (context, state) => const ImportNamesView(),
          ),
        ],
      ),

      GoRoute(
        path: '/products',
        builder: (context, state) => const ProductListView(),
        routes: [
          GoRoute(
            path: 'new',
            builder: (context, state) => const ProductFormView(),
          ),
          GoRoute(
            path: ':id/edit',
            builder: (context, state) {
              final productId = state.pathParameters['id']!;

              return ProductFormView(productId: productId);
            },
          ),
        ],
      ),
      GoRoute(
        path: '/history',
        builder: (context, state) => const HistoryScreenView(),
      ),

      GoRoute(
        path: '/settings',
        builder: (context, state) => const SettingsScreenView(),
      ),

      GoRoute(
        path: '/update-progress',
        builder: (context, state) {
          final update = state.extra as UpdateInfo;
          final simulate = state.uri.queryParameters['simulate'] == 'true';
          final simulateError =
              state.uri.queryParameters['simulateError'] == 'true';
          return UpdateProgressView(
            update: update,
            simulate: simulate,
            simulateError: simulateError,
          );
        },
      ),

      GoRoute(path: '/dev', builder: (context, state) => const DevMenuView()),
      GoRoute(
        path: '/error',
        builder: (context, state) => const ErrorScreenView(),
      ),
    ],
  );
}