import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import '../../services/telemetry_service.dart';

class DiagnosticsScreen extends ConsumerWidget {
  const DiagnosticsScreen({super.key});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final telemetryAsync = ref.watch(telemetryStreamProvider);
    final t = telemetryAsync.value;

    return Scaffold(
      appBar: AppBar(title: const Text('Sensor Diagnostics')),
      body: t == null 
        ? const Center(child: CircularProgressIndicator())
        : ListView(
            padding: const EdgeInsets.all(16.0),
            children: [
              _buildMetric('Timestamp', t.timestamp.toIso8601String()),
              const Divider(),
              const Text('GPS Data', style: TextStyle(color: Colors.cyanAccent, fontWeight: FontWeight.bold)),
              _buildMetric('Latitude', t.latitude?.toString() ?? 'N/A'),
              _buildMetric('Longitude', t.longitude?.toString() ?? 'N/A'),
              _buildMetric('Altitude', t.altitude?.toString() ?? 'N/A'),
              _buildMetric('Speed (m/s)', t.speed?.toString() ?? 'N/A'),
              _buildMetric('Heading', t.heading?.toString() ?? 'N/A'),
              const Divider(),
              const Text('IMU Data', style: TextStyle(color: Colors.cyanAccent, fontWeight: FontWeight.bold)),
              _buildMetric('Accel X (m/s²)', t.accelX?.toStringAsFixed(3) ?? 'N/A'),
              _buildMetric('Accel Y (m/s²)', t.accelY?.toStringAsFixed(3) ?? 'N/A'),
              _buildMetric('Accel Z (m/s²)', t.accelZ?.toStringAsFixed(3) ?? 'N/A'),
              _buildMetric('Longitudinal G', t.longitudinalG?.toStringAsFixed(3) ?? 'N/A'),
              _buildMetric('Lateral G', t.lateralG?.toStringAsFixed(3) ?? 'N/A'),
              _buildMetric('Lean Angle', t.leanAngle?.toStringAsFixed(2) ?? 'N/A'),
              _buildMetric('Pitch Angle', t.pitchAngle?.toStringAsFixed(2) ?? 'N/A'),
            ],
          ),
    );
  }

  Widget _buildMetric(String label, String value) {
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 4.0),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: [
          Text(label, style: const TextStyle(color: Colors.white70)),
          Text(value, style: const TextStyle(fontWeight: FontWeight.bold, fontFamily: 'monospace')),
        ],
      ),
    );
  }
}