// Copyright (C) 2023 WYATT GROUP
// Please see the AUTHORS file for details.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:wyatt_go_router/wyatt_go_router.dart';
import 'package:wyatt_go_router_example/bottom_bar.dart';
import 'package:wyatt_go_router_example/page_a.dart';
import 'package:wyatt_go_router_example/page_b.dart';
import 'package:wyatt_go_router_example/page_c.dart';

abstract class AppRouter {
  /// Default transition for all pages
  static Page<void> defaultTransition(
    BuildContext context,
    GoRouterState state,
    Widget child,
  ) =>
      CupertinoPage<void>(key: state.pageKey, child: child);

  /// Disable transition animation
  static Page<void> noTransition(
    BuildContext context,
    GoRouterState state,
    Widget child,
  ) =>
      NoTransitionPage(key: state.pageKey, child: child);

  static final GlobalKey<NavigatorState> rootNavigatorKey =
      GlobalKey<NavigatorState>();
  static final GlobalKey<NavigatorState> shellNavigatorKey =
      GlobalKey<NavigatorState>();

  /// Defines GoRoute routes.
  static final List<RouteBase> routes = [
    ShellRoute(
      navigatorKey: shellNavigatorKey,
      builder: (context, state, child) {
        final currentRoute = context.currentRoute;

        return Scaffold(
          appBar: AppBar(
            title: Text(
              currentRoute.name ?? 'Unknown',
            ),
          ),
          body: child,
          bottomNavigationBar: BottomBar(
            currentRoute: currentRoute,
          ),
        );
      },
      routes: [
        GoRoute(
          path: '/page-a',
          name: 'A',
          pageBuilder: (context, state) => noTransition(
            context,
            state,
            const PageA(),
          ),
        ),
        GoRoute(
          path: '/page-b',
          name: 'B',
          pageBuilder: (context, state) => noTransition(
            context,
            state,
            const PageB(),
          ),
        ),
      ],
    ),
    GoRoute(
      path: '/page-c',
      name: 'C',
      parentNavigatorKey: rootNavigatorKey,
      pageBuilder: (context, state) => defaultTransition(
        context,
        state,
        const PageC(),
      ),
    ),
  ];

  static GoRouter? _router;

  /// Returns the router.
  static GoRouter routerOf(BuildContext context) => _router ??= GoRouter(
        initialLocation: '/page-a',
        routes: AppRouter.routes,
        navigatorKey: rootNavigatorKey,
        debugLogDiagnostics: true,
      );
}