dmc/app/lib/ui/widgets/drone_status_warnings_panel.dart

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

import '../../domain/telemetry/drone_event.dart';
import '../dmc_colors.dart';
import '../providers/drone_event_log_provider.dart';
import '../providers/telemetry_provider.dart';

enum _PanelTab { status, warnings }

/// Vollbild-Statusmenue fuer den Fly-Modus (Doku: "ein neues menue anlegen
/// fuer die neue drone status pille, nach dem vorbild des menues fuer
/// drones and missions, aber jetzt fuer drone status and warnings") -
/// dieselbe Tab-Struktur wie [MissionsDronesPanel], nur mit den beiden
/// telemetriebezogenen Tabs Status/Warnings statt Missions/Drones.
/// Erreichbar ueber die Drohnen-Status-Pille (Status-Tab) bzw. den
/// Warnungs-Knopf (Warnings-Tab) in der Fusszeile im Fly-Modus (siehe
/// bottom_stats_bar.dart/fly_screen.dart).
class DroneStatusWarningsPanel extends ConsumerStatefulWidget {
  const DroneStatusWarningsPanel.status({super.key}) : _initialTab = _PanelTab.status;
  const DroneStatusWarningsPanel.warnings({super.key}) : _initialTab = _PanelTab.warnings;

  final _PanelTab _initialTab;

  @override
  ConsumerState<DroneStatusWarningsPanel> createState() => _DroneStatusWarningsPanelState();
}

class _DroneStatusWarningsPanelState extends ConsumerState<DroneStatusWarningsPanel> {
  late _PanelTab _tab = widget._initialTab;

  @override
  Widget build(BuildContext context) {
    return Material(
      color: const Color(0xEB080808),
      child: SafeArea(
        child: Column(
          children: [
            Padding(
              padding: const EdgeInsets.fromLTRB(16, 12, 8, 12),
              child: Row(
                children: [
                  const Expanded(
                    child: Text(
                      'Drone Status & Warnings',
                      style: TextStyle(
                        color: Colors.white,
                        fontSize: 20,
                        fontWeight: FontWeight.w700,
                      ),
                    ),
                  ),
                  IconButton(
                    onPressed: () => Navigator.of(context).pop(),
                    icon: const Icon(Icons.close, color: Colors.white),
                  ),
                ],
              ),
            ),
            Row(
              children: [
                _tabButton('Status', _PanelTab.status),
                _tabButton('Warnings', _PanelTab.warnings),
              ],
            ),
            const Divider(color: Colors.white24, height: 1),
            Expanded(
              child: switch (_tab) {
                _PanelTab.status => _statusTab(),
                _PanelTab.warnings => _warningsTab(),
              },
            ),
          ],
        ),
      ),
    );
  }

  Widget _tabButton(String label, _PanelTab tab) {
    final active = _tab == tab;
    return Expanded(
      child: InkWell(
        onTap: () => setState(() => _tab = tab),
        child: Container(
          padding: const EdgeInsets.symmetric(vertical: 10),
          decoration: BoxDecoration(
            border: Border(
              bottom: BorderSide(
                color: active ? const Color(0xFF4D9DFF) : Colors.transparent,
                width: 2,
              ),
            ),
          ),
          child: Text(
            label,
            textAlign: TextAlign.center,
            style: TextStyle(
              color: active ? Colors.white : Colors.white60,
              fontWeight: FontWeight.w600,
              fontSize: 14,
            ),
          ),
        ),
      ),
    );
  }

  // --- Status ---

  Widget _statusTab() {
    final telemetry = ref.watch(telemetryProvider);
    return telemetry.when(
      data: (frame) => ListView(
        padding: const EdgeInsets.all(16),
        children: [
          _statusRow('GPS satellites', '${frame.numSat}'),
          _statusRow(
            'GPS precision (HDOP)',
            frame.hasFix ? frame.hdop.toStringAsFixed(2) : '—',
          ),
          _statusRow(
            'GPS coordinates',
            frame.hasFix
                ? '${frame.lat.toStringAsFixed(6)}, ${frame.lon.toStringAsFixed(6)}'
                : '—',
          ),
          _statusRow('Current draw', '${frame.currentA.toStringAsFixed(1)} A'),
          _statusRow('Battery voltage', '${frame.batteryVoltage.toStringAsFixed(2)} V'),
          _statusRow('Heading', '${frame.headingDeg.round()}°'),
          _statusRow('RX quality / SNR', '${frame.linkQuality}% / ${frame.snrDb} dB'),
          // Downlink-Qualitaet/-SNR und die Akku-SoC des Sendemoduls selbst
          // (nicht der Drohne) sind ueber keinen MSP-GET-Befehl abrufbar -
          // rxLinkStatistics_t (iNAV 9.1, rx.h) hat zwar ein downlinkLQ-Feld,
          // das wird aber nur per MSP2_COMMON_SET_MSP_RC_LINK_STATS von
          // aussen HINEINgeschrieben, nie per GET zurueckgelesen; eine
          // Downlink-SNR oder eine Sender-Akkugroesse existiert im Struct
          // ueberhaupt nicht (verifiziert im lokalen iNAV-Checkout,
          // release/9.1).
          _statusRow('TX battery SoC / quality / SNR', 'Not available (not exposed via MSP)'),
        ],
      ),
      loading: () => const Center(
        child: CircularProgressIndicator(color: Color(0xFF4D9DFF)),
      ),
      error: (err, st) => const Center(
        child: Text('No telemetry', style: TextStyle(color: Colors.white60, fontSize: 15)),
      ),
    );
  }

  Widget _statusRow(String label, String value) {
    return Container(
      margin: const EdgeInsets.symmetric(vertical: 4),
      padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 12),
      decoration: BoxDecoration(
        color: Colors.white.withValues(alpha: 0.04),
        borderRadius: BorderRadius.circular(10),
      ),
      child: Row(
        children: [
          Expanded(child: Text(label, style: const TextStyle(color: Colors.white70))),
          Text(value, style: const TextStyle(color: Colors.white, fontWeight: FontWeight.w600)),
        ],
      ),
    );
  }

  // --- Warnings ---

  Widget _warningsTab() {
    final events = ref.watch(droneEventLogProvider);
    if (events.isEmpty) {
      return const Center(
        child: Text('No events yet', style: TextStyle(color: Colors.white60, fontSize: 15)),
      );
    }
    return ListView.builder(
      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
      itemCount: events.length,
      itemBuilder: (context, index) => _eventRow(events[index]),
    );
  }

  Widget _eventRow(DroneEvent event) {
    final color = event.severity == DroneEventSeverity.critical
        ? DmcColors.warnRed
        : DmcColors.pafAmber;
    return Container(
      margin: const EdgeInsets.symmetric(vertical: 4),
      padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 12),
      decoration: BoxDecoration(
        color: Colors.white.withValues(alpha: 0.04),
        border: Border.all(color: color.withValues(alpha: 0.4)),
        borderRadius: BorderRadius.circular(10),
      ),
      child: Row(
        children: [
          Text(_formatTime(event.timestamp), style: const TextStyle(color: Colors.white60)),
          const SizedBox(width: 12),
          Expanded(
            child: Text(
              event.message,
              style: TextStyle(color: color, fontWeight: FontWeight.w600),
            ),
          ),
        ],
      ),
    );
  }

  String _formatTime(DateTime dt) =>
      '${dt.hour.toString().padLeft(2, '0')}:'
      '${dt.minute.toString().padLeft(2, '0')}:'
      '${dt.second.toString().padLeft(2, '0')}';
}