car-interface-android/lib/features/settings/speed_settings_card.dart

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

import '../../core/theme/app_colors.dart';
import '../../core/widgets/app_icon.dart';
import '../home/obd_controller.dart';
import '../home/telemetry_settings_controller.dart';
import 'settings_widgets.dart';

/// Settings card for showing speed on Home and choosing its source.
class SpeedSettingsCard extends StatelessWidget {
  const SpeedSettingsCard({super.key});

  @override
  Widget build(BuildContext context) {
    final colors = context.colors;
    final theme = Theme.of(context);
    final telemetry = context.watch<TelemetrySettingsController>();
    final obd = context.watch<ObdController>();

    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Row(
          children: [
            Container(
              width: 42,
              height: 42,
              decoration: BoxDecoration(
                color: colors.accentSoft,
                borderRadius: BorderRadius.circular(14),
              ),
              alignment: Alignment.center,
              child: AppIcon(
                'assets/icons/gauge.svg',
                size: 20,
                color: colors.accent,
              ),
            ),
            const SizedBox(width: 14),
            Expanded(
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text('Show speed', style: theme.textTheme.titleMedium),
                  const SizedBox(height: 2),
                  Text(
                    'Show the speed card on the home screen.',
                    style: theme.textTheme.bodySmall?.copyWith(
                      color: colors.inkMuted,
                    ),
                  ),
                ],
              ),
            ),
            const SizedBox(width: 8),
            SettingsSwitch(
              value: telemetry.speedEnabled,
              semanticsLabel: telemetry.speedEnabled
                  ? 'Hide the speed card'
                  : 'Show the speed card',
              onChanged: (value) async {
                final ok = await telemetry.setSpeedEnabled(value);
                if (!ok && context.mounted) {
                  _message(
                    context,
                    'Location permission is required for GPS speed.',
                  );
                }
              },
            ),
          ],
        ),
        if (obd.hasConfiguredAdapter) ...[
          Divider(color: colors.border, height: 30),
          Row(
            children: [
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(
                      'Use OBD-II for speed',
                      style: theme.textTheme.bodyLarge,
                    ),
                    const SizedBox(height: 2),
                    Text(
                      'GPS is used when this is off.',
                      style: theme.textTheme.bodySmall?.copyWith(
                        color: colors.inkMuted,
                      ),
                    ),
                  ],
                ),
              ),
              const SizedBox(width: 8),
              SettingsSwitch(
                value: telemetry.speedUseObd,
                semanticsLabel: telemetry.speedUseObd
                    ? 'Use GPS for speed'
                    : 'Use OBD-II for speed',
                onChanged: (value) async {
                  final ok = await telemetry.setSpeedUseObd(value);
                  if (!ok && context.mounted) {
                    _message(
                      context,
                      'Location permission is required for GPS speed.',
                    );
                  }
                },
              ),
            ],
          ),
        ],
      ],
    );
  }

  void _message(BuildContext context, String message) {
    final messenger = ScaffoldMessenger.of(context);
    messenger.hideCurrentSnackBar();
    messenger.showSnackBar(SnackBar(content: Text(message)));
  }
}