Melo/lib/settings/settings_screen.dart

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

import '../library/database.dart';
import '../library/permissions.dart';
import 'library_stats.dart';

/// Settings-Tab: Bibliotheks-Statistik, Berechtigungen, Über Melo.
///
/// Kein Cloud-/Account-System vorhanden (Phase 2) — daher keine
/// Platzhalter-Einträge für Profil/Sync/Geräte, die aktuell ins Leere laufen.
class SettingsScreen extends StatelessWidget {
  const SettingsScreen({super.key});

  @override
  Widget build(BuildContext context) {
    final db = context.read<MeloDb>();
    return Scaffold(
      appBar: AppBar(title: const Text('Settings')),
      body: ListView(
        children: [
          const _SectionLabel('Bibliothek'),
          StreamBuilder<List<Song>>(
            stream: db.watchSongs(),
            builder: (context, snapshot) {
              final songs = snapshot.data ?? const [];
              return Column(
                children: [
                  ListTile(
                    leading: const Icon(Icons.library_music),
                    title: Text('${songs.length} Songs in der Bibliothek'),
                  ),
                  ListTile(
                    leading: const Icon(Icons.schedule),
                    title:
                        Text('${formatTotalDuration(songs)} Gesamtspieldauer'),
                  ),
                ],
              );
            },
          ),
          const Divider(height: 1),
          const _SectionLabel('Berechtigungen'),
          ListTile(
            leading: const Icon(Icons.mic_none),
            title: const Text('Musik-Berechtigung'),
            trailing: TextButton(
              onPressed: openMusicPermissionSettings,
              child: const Text('Einstellungen öffnen'),
            ),
          ),
          const Divider(height: 1),
          const _SectionLabel('Über Melo'),
          const ListTile(
            leading: Icon(Icons.info_outline),
            title: Text('Melo'),
            subtitle: Text('Deine Musik. Offline. Kein Abo.'),
          ),
        ],
      ),
    );
  }
}

/// Kleine graue Überschrift über einer Einstellungs-Gruppe.
class _SectionLabel extends StatelessWidget {
  const _SectionLabel(this.label);
  final String label;

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.fromLTRB(16, 16, 16, 4),
      child: Text(
        label,
        style: const TextStyle(
          color: Colors.white54,
          fontSize: 12,
          fontWeight: FontWeight.bold,
        ),
      ),
    );
  }
}