TKK_E32220332/lib/screens/analytics_screen.dart

import 'package:flutter/material.dart';
import 'package:fl_chart/fl_chart.dart';
import '../services/supabase_service.dart';

class AnalyticsScreen extends StatefulWidget {
  const AnalyticsScreen({super.key});

  @override
  State<AnalyticsScreen> createState() => _AnalyticsScreenState();
}

class _AnalyticsScreenState extends State<AnalyticsScreen> {
  List<Map<String, dynamic>> _logs = [];
  bool _isLoading = true;

  @override
  void initState() {
    super.initState();
    _fetchLogs();
  }

  Future<void> _fetchLogs() async {
    try {
      final data = await SupabaseService().getSensorLogs();
      setState(() {
        _logs = data;
        _isLoading = false;
      });
    } catch (e) {
      debugPrint('Error fetching logs: $e');
      setState(() => _isLoading = false);
    }
  }

  @override
  Widget build(BuildContext context) {
    final args = ModalRoute.of(context)!.settings.arguments as Map<String, dynamic>;
    final String title = args['title'];
    final Color color = args['color'];
    final String sensorKey = title.contains('Suhu') ? 'suhu' : title.contains('Kelembaban') ? 'kelembapan' : 'intensitas';

    return Scaffold(
      backgroundColor: Colors.black,
      appBar: AppBar(
        backgroundColor: Colors.black,
        title: Text(title, style: const TextStyle(color: Colors.white)),
        leading: IconButton(
          icon: const Icon(Icons.arrow_back, color: Colors.grey),
          onPressed: () => Navigator.pop(context),
        ),
      ),
      body: _isLoading 
        ? const Center(child: CircularProgressIndicator(color: Colors.green))
        : Padding(
        padding: const EdgeInsets.all(20.0),
        child: Column(
          children: [
            _buildChartCard(title, color, _logs, sensorKey),
            const SizedBox(height: 20),
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                const Text('Riwayat Data', style: TextStyle(color: Colors.white, fontSize: 18, fontWeight: FontWeight.bold)),
                IconButton(icon: const Icon(Icons.refresh, color: Colors.green), onPressed: _fetchLogs),
              ],
            ),
            const SizedBox(height: 10),
            Expanded(
              child: Container(
                decoration: BoxDecoration(
                  color: const Color(0xFF1A1A1A),
                  borderRadius: BorderRadius.circular(20),
                ),
                child: ListView.separated(
                  padding: const EdgeInsets.all(15),
                  itemCount: _logs.length,
                  separatorBuilder: (context, index) => const Divider(color: Colors.grey),
                  itemBuilder: (context, index) {
                    final log = _logs[index];
                    return Padding(
                      padding: const EdgeInsets.symmetric(vertical: 8.0),
                      child: Row(
                        mainAxisAlignment: MainAxisAlignment.spaceBetween,
                        children: [
                          Column(
                            crossAxisAlignment: CrossAxisAlignment.start,
                            children: [
                              Text(log['timestamp'] ?? '', style: const TextStyle(color: Colors.grey, fontSize: 10)),
                              Text('Fans: ${log['kipas1']}/${log['kipas2']}', style: const TextStyle(color: Colors.green, fontSize: 10)),
                            ],
                          ),
                          Text('${log[sensorKey]}', style: TextStyle(color: color, fontWeight: FontWeight.bold)),
                        ],
                      ),
                    );
                  },
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildChartCard(String title, Color color, List<Map<String, dynamic>> logs, String key) {
    List<FlSpot> spots = [];
    if (logs.isNotEmpty) {
      final reversedLogs = logs.reversed.toList();
      for (int i = 0; i < reversedLogs.length; i++) {
        spots.add(FlSpot(i.toDouble(), double.tryParse(reversedLogs[i][key].toString()) ?? 0));
      }
    }

    return Container(
      height: 250,
      padding: const EdgeInsets.all(20),
      decoration: BoxDecoration(
        color: const Color(0xFF1A1A1A),
        borderRadius: BorderRadius.circular(20),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(title, style: const TextStyle(color: Colors.white, fontWeight: FontWeight.bold)),
          const SizedBox(height: 20),
          Expanded(
            child: LineChart(
              LineChartData(
                gridData: FlGridData(show: false),
                titlesData: FlTitlesData(show: false),
                borderData: FlBorderData(show: false),
                lineBarsData: [
                  LineChartBarData(
                    spots: spots.isEmpty ? [const FlSpot(0, 0)] : spots,
                    isCurved: true,
                    color: color,
                    barWidth: 4,
                    dotData: FlDotData(show: false),
                    belowBarData: BarAreaData(show: true, color: color.withOpacity(0.1)),
                  ),
                ],
              ),
            ),
          ),
          Align(
            alignment: Alignment.bottomRight,
            child: Text(
              'Terakhir: ${logs.isNotEmpty ? logs.first[key] : "-"}', 
              style: TextStyle(color: color, fontSize: 12)
            ),
          ),
        ],
      ),
    );
  }
}