/// Ported from `com.rippr.ui.RipprNavHost`.
///
/// Three destinations, same shape as the Compose original. `go_router` replaces
/// `navigation-compose`; the path parameter is parsed explicitly, mirroring the Kotlin
/// comment about ids arriving as the wrong type when the argument type is left implicit.
library;

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

import 'detail/trip_detail_screen.dart';
import 'record/record_screen.dart';
import 'trips/trips_screen.dart';

abstract final class Routes {
  static const record = '/';
  static const trips = '/trips';
  static const tripDetail = '/trip/:tripId';

  static String detailFor(int tripId) => '/trip/$tripId';
}

GoRouter buildRouter() => GoRouter(
  initialLocation: Routes.record,
  routes: [
    GoRoute(
      path: Routes.record,
      builder: (context, state) =>
          RecordScreen(onOpenTrips: () => context.push(Routes.trips)),
    ),
    GoRoute(
      path: Routes.trips,
      builder: (context, state) => TripsScreen(
        onOpenTrip: (id) => context.push(Routes.detailFor(id)),
        onBack: () => context.pop(),
      ),
    ),
    GoRoute(
      path: Routes.tripDetail,
      builder: (context, state) {
        // Parsed explicitly. A malformed or missing id must land on a real screen
        // saying so, never on a blank one or a crash.
        final id = int.tryParse(state.pathParameters['tripId'] ?? '');
        if (id == null) {
          return const _NotFound();
        }
        return TripDetailScreen(tripId: id, onBack: () => context.pop());
      },
    ),
  ],
  errorBuilder: (context, state) => const _NotFound(),
);

class _NotFound extends StatelessWidget {
  const _NotFound();

  @override
  Widget build(BuildContext context) => Scaffold(
    appBar: AppBar(
      leading: IconButton(
        icon: const Icon(Icons.arrow_back),
        onPressed: () =>
            context.canPop() ? context.pop() : context.go(Routes.record),
      ),
    ),
    body: const Center(child: Text('That ride could not be found.')),
  );
}