PilotVault/Fly Agent App/lib/ui/settings_page.dart

import 'package:flutter/material.dart';

import '../api/api.dart';
import '../services.dart';
import '../theme.dart';
import '../uplink/uplink.dart';

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

  @override
  State<SettingsPage> createState() => _SettingsPageState();
}

class _SettingsPageState extends State<SettingsPage> {
  bool? _batteryExempt;

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    _checkBattery();
  }

  Future<void> _checkBattery() async {
    try {
      final bool v = await Services.of(context).rid.isIgnoringBatteryOptimizations();
      if (mounted) setState(() => _batteryExempt = v);
    } catch (_) {}
  }

  @override
  Widget build(BuildContext context) {
    final Services s = Services.of(context);
    final Api api = s.api;
    return Scaffold(
      appBar: AppBar(title: const Text('Settings')),
      body: ListenableBuilder(
        listenable: Listenable.merge(<Listenable>[api, s.uplink, s.rid]),
        builder: (BuildContext context, _) => ListView(
          padding: const EdgeInsets.all(16),
          children: <Widget>[
            const SectionLabel('Account'),
            Card(
              child: Column(
                children: <Widget>[
                  ListTile(
                    leading: const Icon(Icons.person_outline),
                    title: Text(api.me?.email ?? api.email),
                    subtitle: Text(<String>[
                      if (api.me?.role.isNotEmpty ?? false) api.me!.role,
                      if (api.me?.orgName.isNotEmpty ?? false) api.me!.orgName,
                    ].join(' · ')),
                  ),
                  ListTile(
                    leading: const Icon(Icons.dns_outlined),
                    title: const Text('API server'),
                    subtitle: Text(api.serverUrl),
                  ),
                  ListTile(
                    leading: const Icon(Icons.logout, color: PV.warning),
                    title: const Text('Sign out'),
                    onTap: () async {
                      s.uplink.disable();
                      await api.signOut();
                      if (context.mounted) Navigator.of(context).pop();
                    },
                  ),
                ],
              ),
            ),
            const SectionLabel('Live uplink'),
            Card(
              child: Column(
                children: <Widget>[
                  SwitchListTile(
                    title: const Text('Stream the paired aircraft to PilotVault'),
                    subtitle: Text(_uplinkText(s.uplink)),
                    value: s.uplink.status != UplinkStatus.off,
                    onChanged: (bool on) => on ? s.uplink.enable(api.serverUrl) : s.uplink.disable(),
                  ),
                ],
              ),
            ),
            const SectionLabel('Pairing'),
            Card(
              child: ListTile(
                leading: const Icon(Icons.link),
                title: Text(s.rid.pairing?.droneName ?? 'No aircraft paired'),
                subtitle: Text(s.rid.pairing?.serial ?? 'Pair one under Nearby'),
                trailing: s.rid.pairing == null
                    ? null
                    : TextButton(onPressed: s.rid.unpair, child: const Text('Unpair')),
              ),
            ),
            const SectionLabel('Background'),
            Card(
              child: Column(
                children: <Widget>[
                  ListTile(
                    leading: Icon(Icons.battery_saver_outlined, color: _batteryExempt == false ? PV.caution : PV.ready),
                    title: const Text('Battery optimisation'),
                    subtitle: Text(_batteryExempt == null
                        ? '…'
                        : _batteryExempt!
                            ? 'Exempt: Android will not stop the receiver'
                            : 'Android may stop the receiver while DJI Fly is in front'),
                    trailing: _batteryExempt == false
                        ? TextButton(
                            onPressed: () async {
                              await s.rid.requestIgnoreBatteryOptimizations();
                              await Future<void>.delayed(const Duration(seconds: 1));
                              _checkBattery();
                            },
                            child: const Text('Exempt'),
                          )
                        : null,
                  ),
                  const ListTile(
                    leading: Icon(Icons.wifi_find),
                    title: Text('Wi-Fi Beacon updates'),
                    subtitle: Text('Android limits Wi-Fi scans to 4 per 2 minutes. For faster Beacon updates turn off '
                        '"Wi-Fi scan throttling" in Developer options.'),
                  ),
                ],
              ),
            ),
          ],
        ),
      ),
    );
  }

  String _uplinkText(Uplink u) => switch (u.status) {
        UplinkStatus.off => 'Off',
        UplinkStatus.connecting => 'Waiting for the paired aircraft',
        UplinkStatus.live => 'Live as ${u.deviceId} · ${u.sent} sent',
        UplinkStatus.offline => 'Server unreachable · ${u.buffered} buffered',
      };
}