import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';
import 'package:mileograph_flutter/components/calculator/route_summary_widget.dart';
import 'package:mileograph_flutter/objects/objects.dart';
import 'package:mileograph_flutter/services/distance_unit_service.dart';
import 'package:provider/provider.dart';

class CalculatorDetailsPage extends StatelessWidget {
  const CalculatorDetailsPage({
    super.key,
    required this.result,
  });

  final Object? result;

  @override
  Widget build(BuildContext context) {
    final parsed = result is RouteResult ? result as RouteResult : null;
    if (parsed == null) {
      return Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            TextButton.icon(
              onPressed: () => context.pop(),
              icon: const Icon(Icons.arrow_back),
              label: const Text('Back'),
            ),
            const SizedBox(height: 12),
            const Text(
              'No route details available.',
            ),
          ],
        ),
      );
    }

    final networks = List<NetworkMileage>.from(parsed.networkMileage)
      ..sort((a, b) => b.miles.compareTo(a.miles));
    final countries = List<CountryMileage>.from(parsed.countryMileage)
      ..sort((a, b) => b.miles.compareTo(a.miles));

    return Scaffold(
      endDrawer: _NetworksDrawer(
        networks: networks,
        countries: countries,
      ),
      body: Builder(
        builder: (scaffoldContext) => Padding(
          padding: const EdgeInsets.all(16.0),
          child: RouteDetailsView(
            route: parsed.calculatedRoute,
            costs: parsed.costs,
            routingPoints: parsed.inputRoute.toSet(),
            onBack: () => context.pop(),
            onNetworksPressed: () =>
                Scaffold.of(scaffoldContext).openEndDrawer(),
          ),
        ),
      ),
    );
  }
}

class _NetworksDrawer extends StatelessWidget {
  const _NetworksDrawer({
    required this.networks,
    required this.countries,
  });

  final List<NetworkMileage> networks;
  final List<CountryMileage> countries;

  @override
  Widget build(BuildContext context) {
    final distanceUnits = context.watch<DistanceUnitService>();
    return Drawer(
      child: SafeArea(
        child: ListView(
          padding: const EdgeInsets.all(16),
          children: [
            Text(
              'Networks',
              style: Theme.of(context).textTheme.titleMedium,
            ),
            const SizedBox(height: 8),
            if (networks.isEmpty)
              const Text('No network mileage data.')
            else
              ...networks.map(
                (entry) => ListTile(
                  contentPadding: EdgeInsets.zero,
                  title: Text(entry.network),
                  trailing:
                      Text(distanceUnits.format(entry.miles, decimals: 2)),
                ),
              ),
            const SizedBox(height: 16),
            Text(
              'Countries',
              style: Theme.of(context).textTheme.titleMedium,
            ),
            const SizedBox(height: 8),
            if (countries.isEmpty)
              const Text('No country mileage data.')
            else
              ...countries.map(
                (entry) => ListTile(
                  contentPadding: EdgeInsets.zero,
                  title: Text(entry.country),
                  trailing:
                      Text(distanceUnits.format(entry.miles, decimals: 2)),
                ),
              ),
          ],
        ),
      ),
    );
  }
}