import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';
import 'package:kooltab2/views/settings_view.dart';

import '../viewmodels/pin_lock_view_model.dart';
import '../views/bar_screen_view.dart';
import '../views/history_screen_view.dart';
import '../views/pin_lock_view.dart';
import '../views/product_form_view.dart';
import '../views/product_list_view.dart';

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

GoRouter createAppRouter(PinLockViewModel pinLockViewModel) {
  return GoRouter(
    initialLocation: '/bar',
    observers: [routeObserver],
    refreshListenable: pinLockViewModel,
    redirect: (context, state) {
      if (!pinLockViewModel.hasLoaded) return null;

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

      final goingToLock = state.matchedLocation == '/lock';

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

      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: '/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(),
      ),
    ],
  );
}