import 'dart:async';
import 'dart:io';
import 'package:flutter/material.dart';
import '../database/db_helper.dart';
import '../viewmodels/melo_home_viewmodel.dart';
import '../models/song.dart';
import '../models/playlist.dart';
import '../utils/farb_theme.dart';
import '../utils/user_effekte.dart';
import '../services/cloud_service.dart';
import '../widgets/mini_player.dart';
import '../widgets/melo_header.dart';
import '../widgets/statistik_card.dart';
import '../widgets/tag_leiste.dart';
import '../widgets/song_tile.dart';
import '../widgets/navidrome_browser.dart';
import '../widgets/playlist_sheet.dart';
import 'download_screen.dart';
import 'cloud_screen.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:permission_handler/permission_handler.dart';
import '../widgets/cloud_einstellungen.dart';
import '../config/app_config.dart';

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

  @override
  State<MeloHome> createState() => _MeloHomeState();
}

class _MeloHomeState extends State<MeloHome> {
  final MeloHomeViewModel _vm = MeloHomeViewModel();
  final CloudService _cloud = CloudService();
  int _aktiverTab = 0;

  String _nutzer = 'Baka'; // Aktueller Nutzer

  @override
  void initState() {
    super.initState();
    _ladeNutzer();
    _vm.addListener(() => setState(() {}));
    _vm.ladeSongs();
  }

  Future<void> _ladeNutzer() async {
    final p = await SharedPreferences.getInstance();
    final n = p.getString('melo_nutzer') ?? '';
    if (n.isNotEmpty && mounted) {
      setState(() => _nutzer = n);
      _vm.setzeNutzer(n);
    }
    // Erster Start? → einmalig Modus wählen (Cloud oder nur lokal) – Login ist freiwillig
    if (!p.containsKey('melo_modus')) {
      await _zeigeModusWahl();
      return;
    }
    // Login-Effekt beim App-Start: nur wenn ein Token vorhanden ist (eingeloggt)
    final ok = await CloudService().restoreLogin();
    if (ok && mounted) {
      UserEffekt.anwenden(_nutzer);
      ScaffoldMessenger.of(context).showSnackBar(SnackBar(
        content: Text(UserEffekt.fuer(_nutzer).begruessung),
        duration: const Duration(seconds: 3),
      ));
    }
  }

  /// Einmalige Auswahl beim ersten App-Start: Cloud-Sync oder nur lokal.
  Future<void> _zeigeModusWahl() async {
    if (!mounted) return;
    final cloud = await showDialog<bool>(
      context: context,
      barrierDismissible: false,
      builder: (ctx) => AlertDialog(
        backgroundColor: MeloTheme.dunkel1,
        title: const Text('👋 Willkommen bei Melo!',
            style: TextStyle(color: Colors.white, fontSize: 16)),
        content: const Text(
          'Wie möchtest du Melo nutzen?',
          style: TextStyle(color: Colors.white, fontSize: 14),
        ),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(ctx, false),
            child: const Text('📱 Nur lokal',
                style: TextStyle(color: Colors.white)),
          ),
          TextButton(
            onPressed: () => Navigator.pop(ctx, true),
            child: const Text('☁️ Cloud (empfohlen)',
                style: TextStyle(color: MeloTheme.rot, fontWeight: FontWeight.bold)),
          ),
        ],
      ),
    );
    final p = await SharedPreferences.getInstance();
    await p.setString('melo_modus', cloud == true ? 'cloud' : 'lokal');
    // Cloud gewählt → direkt zum Login-Dialog (Name + Passwort)
    if (cloud == true && mounted) {
      _nutzerWechseln();
    }
  }

  Future<void> _zeigeProfil() async {
    final p = await SharedPreferences.getInstance();
    final modus = p.getString('melo_modus') ?? 'cloud';
    if (!mounted) return;
    showDialog(
      context: context,
      builder: (ctx) => AlertDialog(
        backgroundColor: MeloTheme.dunkel1,
        title: Row(children: [
          const Icon(Icons.person, color: MeloTheme.rot, size: 22),
          const SizedBox(width: 8),
          Text(_nutzer, style: const TextStyle(color: Colors.white, fontSize: 17)),
        ]),
        content: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            _profilZeile(Icons.music_note, 'Lieder auf Gerät', '${_vm.songs.length}'),
            _profilZeile(Icons.cloud, 'Cloud-Server', '${_cloud.status().then((s) => s?['total'] ?? 0)}'),
            const Divider(color: MeloTheme.dunkel2),
            // Später von "nur lokal" auf Cloud wechseln – jederzeit möglich
            if (modus == 'lokal') ...[
              ListTile(
                leading: const Icon(Icons.cloud_upload, color: Colors.blueAccent, size: 18),
                title: const Text('☁️ Cloud aktivieren',
                    style: TextStyle(color: Colors.white, fontSize: 13)),
                subtitle: const Text('Musik sichern & geräteübergreifend nutzen',
                    style: TextStyle(color: Colors.grey, fontSize: 11)),
                onTap: () async {
                  final prefs = await SharedPreferences.getInstance();
                  await prefs.setString('melo_modus', 'cloud');
                  if (ctx.mounted) Navigator.pop(ctx);
                  _nutzerWechseln();
                },
              ),
              const Divider(color: MeloTheme.dunkel2),
            ],
            ListTile(
              leading: const Icon(Icons.swap_horiz, color: Colors.grey, size: 18),
              title: const Text('Nutzer wechseln', style: TextStyle(color: Colors.white, fontSize: 13)),
              onTap: () {
                Navigator.pop(ctx);
                _nutzerWechseln();
              },
            ),
            ListTile(
              leading: const Icon(Icons.logout, color: Colors.red, size: 18),
              title: const Text('Abmelden', style: TextStyle(color: Colors.red, fontSize: 13)),
              onTap: () async {
                // Token wirklich löschen, sonst wäre man gar nicht abgemeldet
                await CloudService().logout();
                final prefs = await SharedPreferences.getInstance();
                await prefs.remove('melo_nutzer');
                if (ctx.mounted) Navigator.pop(ctx);
                if (mounted) setState(() => _nutzer = '');
              },
            ),
          ],
        ),
      ),
    );
  }

  Widget _profilZeile(IconData icon, String label, String wert) {
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 6),
      child: Row(children: [
        Icon(icon, color: MeloTheme.rot, size: 16),
        const SizedBox(width: 8),
        Expanded(child: Text(label, style: const TextStyle(color: Colors.grey, fontSize: 12))),
        Text(wert, style: const TextStyle(color: Colors.white, fontSize: 14, fontWeight: FontWeight.w600)),
      ]),
    );
  }

  void _nutzerWechseln() {
    final ctrl = TextEditingController(text: _nutzer);
    final pwCtrl = TextEditingController();
    showDialog(
      context: context,
      builder: (ctx) => AlertDialog(
        backgroundColor: MeloTheme.dunkel1,
        title: const Text('👤 Anmelden', style: TextStyle(color: Colors.white, fontSize: 15)),
        content: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            TextField(
              controller: ctrl,
              autofocus: true,
              style: const TextStyle(color: Colors.white),
              decoration: const InputDecoration(
                hintText: 'Nutzername...',
                hintStyle: TextStyle(color: Colors.grey),
                border: OutlineInputBorder(),
              ),
            ),
            const SizedBox(height: 8),
            TextField(
              controller: pwCtrl,
              obscureText: true,
              style: const TextStyle(color: Colors.white),
              decoration: const InputDecoration(
                hintText: 'Passwort...',
                hintStyle: TextStyle(color: Colors.grey),
                border: OutlineInputBorder(),
              ),
            ),
          ],
        ),
        actions: [
          TextButton(onPressed: () => Navigator.pop(ctx), child: const Text('Abbrechen')),
          TextButton(
            onPressed: () async {
              final name = ctrl.text.trim();
              final pass = pwCtrl.text;
              if (name.isEmpty || pass.isEmpty) return;
              final ok = await _vm.cloud.login(name, pass);
              if (!ctx.mounted) return;
              Navigator.pop(ctx);
              if (ok) {
                final p = await SharedPreferences.getInstance();
                await p.setString('melo_nutzer', name);
                if (mounted) setState(() => _nutzer = name);
                _vm.setzeNutzer(name);
                // Login-Effekt: Akzentfarbe + Sound + Begrüßung pro Person
                UserEffekt.anwenden(name);
                if (mounted) {
                  ScaffoldMessenger.of(context).showSnackBar(SnackBar(
                      content: Text(UserEffekt.fuer(name).begruessung),
                      duration: const Duration(seconds: 3)));
                }
              } else {
                if (mounted) {
                  ScaffoldMessenger.of(context).showSnackBar(const SnackBar(
                      content: Text('❌ Login fehlgeschlagen – Name oder Passwort falsch')));
                }
              }
            },
            child: const Text('OK', style: TextStyle(color: MeloTheme.rot)),
          ),
        ],
      ),
    );
  }
  @override
  void dispose() {
    _vm.dispose();
    super.dispose();
  }

  Future<void> _zeigeSuche() async {
    final controller = TextEditingController();
    String modus = 'Alle';
    final ergebnis = await showDialog<String>(
      context: context,
      builder: (ctx) => StatefulBuilder(
        builder: (ctx, setDialogState) => AlertDialog(
          backgroundColor: MeloTheme.dunkel1,
          title: const Text('🔍 Song suchen', style: TextStyle(color: Colors.white, fontSize: 18)),
          content: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              TextField(
                controller: controller,
                autofocus: true,
                style: const TextStyle(color: Colors.white),
                decoration: const InputDecoration(
                  hintText: 'Titel, Künstler oder Tag...',
                  hintStyle: TextStyle(color: Colors.grey),
                  border: OutlineInputBorder(),
                ),
              ),
              const SizedBox(height: 12),
              Row(
                children: [
                  _suchChip('Alle', modus == 'Alle', () => setDialogState(() => modus = 'Alle')),
                  const SizedBox(width: 6),
                  _suchChip('Titel', modus == 'Titel', () => setDialogState(() => modus = 'Titel')),
                  const SizedBox(width: 6),
                  _suchChip('Künstler', modus == 'Künstler', () => setDialogState(() => modus = 'Künstler')),
                  const SizedBox(width: 6),
                  _suchChip('Tag', modus == 'Tag', () => setDialogState(() => modus = 'Tag')),
                ],
              ),
            ],
          ),
          actions: [
            TextButton(onPressed: () => Navigator.pop(ctx), child: const Text('Abbrechen')),
            TextButton(
              onPressed: () => Navigator.pop(ctx, '${controller.text}|$modus'),
              child: const Text('Suchen', style: TextStyle(color: MeloTheme.rot)),
            ),
          ],
        ),
      ),
    );
    if (ergebnis == null || ergebnis.isEmpty) return;

    final teile = ergebnis.split('|');
    final suchtext = teile[0].toLowerCase();
    final suchModus = teile.length > 1 ? teile[1] : 'Alle';
    if (suchtext.isEmpty) return;

    // Tag-Namen die zum Suchtext passen
    final matchingTags = _vm.tags
        .where((t) => t['name'] != 'Alle' && t['name']!.toLowerCase().contains(suchtext))
        .map((t) => t['name']!)
        .toSet();

    final gefiltert = _vm.songs.where((s) {
      if (suchModus == 'Titel') return s.titel.toLowerCase().contains(suchtext);
      if (suchModus == 'Künstler') return s.kuenstler.toLowerCase().contains(suchtext);
      if (suchModus == 'Tag') {
        return s.tagIds != null && matchingTags.any((name) {
          final tag = _vm.tagsMap[name];
          return tag != null && s.tagIds!.contains(tag.id);
        });
      }
      // Alle
      if (s.titel.toLowerCase().contains(suchtext)) return true;
      if (s.kuenstler.toLowerCase().contains(suchtext)) return true;
      return s.tagIds != null && matchingTags.any((name) {
        final tag = _vm.tagsMap[name];
        return tag != null && s.tagIds!.contains(tag.id);
      });
    }).toList();
    if (!mounted) return;
    showDialog(
      context: context,
      builder: (ctx) => AlertDialog(
        backgroundColor: MeloTheme.dunkel1,
        title: Text('🔍 ${gefiltert.length} Treffer', style: const TextStyle(color: Colors.white)),
        content: SizedBox(
          width: double.maxFinite,
          height: 300,
          child: gefiltert.isEmpty
            ? const Center(child: Text('Keine Treffer', style: TextStyle(color: Colors.grey)))
            : ListView.builder(
                itemCount: gefiltert.length,
                itemBuilder: (_, i) => ListTile(
                  leading: Container(
                    width: 36, height: 36,
                    decoration: BoxDecoration(
                      borderRadius: BorderRadius.circular(8),
                      gradient: const LinearGradient(colors: [Color(0xFF1A0000), Color(0xFF660000)]),
                    ),
                    child: const Center(child: Text('♪', style: TextStyle(fontSize: 14, color: Colors.white54))),
                  ),
                  title: Text(gefiltert[i].titel, style: const TextStyle(color: Colors.white)),
                  subtitle: Text(gefiltert[i].kuenstler, style: const TextStyle(color: Colors.grey)),
                  onTap: () { Navigator.pop(ctx); _vm.spieleSong(gefiltert[i]); },
                ),
              ),
        ),
        actions: [TextButton(onPressed: () => Navigator.pop(ctx), child: const Text('Schließen'))],
      ),
    );
  }

  Future<void> _scanMusik() async {
    final erlaubt = await _vm.scanner.frageSpeicherZugriff();
    if (!erlaubt) {
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Bitte Speicherzugriff erlauben')),
        );
      }
      return;
    }
    await _vm.scanner.scanneMusikOrdner();
    if (mounted) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text('Scannen fertig: ${_vm.scanner.anzahlNeueSongs} neue Songs gefunden')),
      );
      await _vm.ladeSongs();
    }
  }

  void _zeigeServerBrowser() {
    if (_vm.navidrome.istVerbunden) {
      // Abmelden
      _vm.navidrome.setCredentials('', '', '');
      _vm.navidromeAlben.clear();
      setState(() {});
      return;
    }
    // Verbinden: einfacher Login-Dialog
    final urlCtrl = TextEditingController(text: AppConfig.navidromeUrl);
    final userCtrl = TextEditingController();
    final passCtrl = TextEditingController();
    showDialog(
      context: context,
      builder: (ctx) => AlertDialog(
        backgroundColor: MeloTheme.dunkel1,
        title: const Text('🌐 Navidrome verbinden', style: TextStyle(color: Colors.white, fontSize: 15)),
        content: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            TextField(controller: urlCtrl, style: const TextStyle(color: Colors.white),
              decoration: const InputDecoration(labelText: 'Server', border: OutlineInputBorder(),
                labelStyle: TextStyle(color: Colors.grey))),
            const SizedBox(height: 8),
            TextField(controller: userCtrl, style: const TextStyle(color: Colors.white),
              decoration: const InputDecoration(labelText: 'Benutzer', border: OutlineInputBorder(),
                labelStyle: TextStyle(color: Colors.grey))),
            const SizedBox(height: 8),
            TextField(controller: passCtrl, obscureText: true, style: const TextStyle(color: Colors.white),
              decoration: const InputDecoration(labelText: 'Passwort', border: OutlineInputBorder(),
                labelStyle: TextStyle(color: Colors.grey))),
          ],
        ),
        actions: [
          TextButton(onPressed: () => Navigator.pop(ctx), child: const Text('Abbrechen')),
          TextButton(
            onPressed: () async {
              _vm.verbindeNavidrome(urlCtrl.text, userCtrl.text, passCtrl.text);
              await _vm.ladeNavidromeAlben();
              await _vm.navidrome.speichereZugangsdaten(urlCtrl.text, userCtrl.text, passCtrl.text);
              if (ctx.mounted) Navigator.pop(ctx);
              setState(() {});
            },
            child: const Text('Verbinden', style: TextStyle(color: MeloTheme.rot)),
          ),
        ],
      ),
    );
  }

  void _zeigePlaylistSheet() {
    showModalBottomSheet(
      context: context,
      backgroundColor: MeloTheme.schwarz,
      isScrollControlled: true,
      builder: (_) => SizedBox(
        height: MediaQuery.of(context).size.height * 0.7,
        child: PlaylistSheet(vm: _vm),
      ),
    );
  }

  void _songLoeschen(Song song) async {
    if (song.id != null) {
      final db = DbHelper();
      await db.loeschSong(song.id!);
      if (song.dateiPfad.isNotEmpty) {
        try { await File(song.dateiPfad).delete(); } catch (_) {}
      }
      _vm.ladeSongs();
    }
  }

  void _zeigePlaylists() {
    showModalBottomSheet(
      context: context,
      backgroundColor: MeloTheme.schwarz,
      isScrollControlled: true,
      builder: (_) => SizedBox(
        height: MediaQuery.of(context).size.height * 0.7,
        child: PlaylistSheet(vm: _vm),
      ),
    );
  }

  void _zeigeAddToPlaylist(Song song) async {
    final playlists = await _vm.playlists.allePlaylists();
    if (!mounted || playlists.isEmpty) {
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Erst eine Playlist erstellen')),
        );
      }
      return;
    }
    final auswahl = await showDialog<Playlist>(
      context: context,
      builder: (ctx) => AlertDialog(
        backgroundColor: MeloTheme.dunkel1,
        title: const Text('Zu Playlist hinzufügen', style: TextStyle(color: Colors.white, fontSize: 16)),
        content: SizedBox(
          width: double.maxFinite,
          child: ListView.builder(
            shrinkWrap: true,
            itemCount: playlists.length,
            itemBuilder: (_, i) => ListTile(
              leading: const Icon(Icons.queue_music, color: MeloTheme.rot, size: 18),
              title: Text(playlists[i].name, style: const TextStyle(color: Colors.white, fontSize: 14)),
              subtitle: Text('${playlists[i].songCount} Songs', style: const TextStyle(fontSize: 11, color: MeloTheme.textSekundaer)),
              onTap: () => Navigator.pop(ctx, playlists[i]),
            ),
          ),
        ),
        actions: [TextButton(onPressed: () => Navigator.pop(ctx), child: const Text('Abbrechen'))],
      ),
    );
    if (auswahl != null && song.id != null) {
      await _vm.playlists.songHinzufuegen(auswahl.id!, song.id!);
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text('→ ${auswahl.name}')),
        );
      }
    }
  }

  Future<void> _zeigeDownloadDialog() async {
    // Statt Dialog → zum Download-Tab wechseln
    setState(() => _aktiverTab = 1);
  }

  @override
  Widget build(BuildContext context) {
    return ListenableBuilder(
      listenable: _vm,
      builder: (_, _) {
        if (_vm.ladt) {
          return const Scaffold(
            backgroundColor: MeloTheme.schwarz,
            body: Center(child: CircularProgressIndicator(color: MeloTheme.rot)),
          );
        }

        final gesamtMB = _vm.songs.isEmpty ? '0.0'
          : (_vm.songs.fold(0, (int s, Song song) => s + song.groesseBytes) / 1048576).toStringAsFixed(1);
        final gesamtMin = _vm.songs.isEmpty ? 0
          : (_vm.songs.fold(0, (int s, Song song) => s + song.dauerSekunden) / 60).round();

        return Scaffold(
          backgroundColor: MeloTheme.schwarz,
          body: SafeArea(
            child: _aktiverTab == 1
              ? DownloadScreen(
                  downloader: _vm.downloader,
                  onSongsChanged: _vm.ladeSongs,
                )
              : _aktiverTab == 3
              ? CloudScreen(cloud: _cloud, onSongsChanged: _vm.ladeSongs)
              : Column(
              children: [
                MeloHeader(onDownload: _zeigeDownloadDialog, onSearch: _zeigeSuche, onServer: _zeigeProfil, onSettings: _zeigeEinstellungen),
                if (_vm.zeigeBotschaft) _botschaftBanner(),
                _tagBereich(),
                Expanded(child: _songListe()),
                const MiniPlayer(),
                const SizedBox(height: 8),
              ],
            ),
          ),
          bottomNavigationBar: _bottomNav(),
        );
      },
    );
  }

  Widget _songListe() {
    final songs = _vm.gefilterteSongs;
    return Column(
      children: [
        Padding(
          padding: const EdgeInsets.fromLTRB(20, 12, 20, 4),
          child: Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              const Text('📂 Alle Songs', style: TextStyle(fontSize: 16, fontWeight: FontWeight.w600, color: Colors.white)),
              Row(children: [
                Text('${songs.length} Titel${_vm.aktiveTags.isNotEmpty ? ' (gefiltert)' : ''}', style: TextStyle(fontSize: 12, color: MeloTheme.rot)),
                const SizedBox(width: 8),
                GestureDetector(
                  onTap: _scanMusik,
                  child: Container(
                    padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
                    decoration: BoxDecoration(
                      border: Border.all(color: MeloTheme.dunkel2),
                      borderRadius: BorderRadius.circular(8),
                    ),
                    child: const Row(
                      mainAxisSize: MainAxisSize.min,
                      children: [
                        Icon(Icons.refresh, size: 12, color: MeloTheme.rot),
                        SizedBox(width: 4),
                        Text('Scannen', style: TextStyle(fontSize: 11, color: MeloTheme.rot)),
                      ],
                    ),
                  ),
                ),
              ]),
            ],
          ),
        ),
        Expanded(
          child: songs.isEmpty
              ? _emptyStateWidget()
              : ListView.builder(
            padding: const EdgeInsets.fromLTRB(20, 4, 20, 4),
            itemCount: songs.length,
            itemBuilder: (_, i) => SongTile(
              song: songs[i],
              istFavorit: songs[i].id != null && _vm.favoritenIds.contains(songs[i].id),
              onFavoriteToggle: _vm.favoritenUmschalten,
              onPlay: _vm.spieleSong,
              onMetadataChanged: _vm.ladeSongs,
              onAddToPlaylist: _zeigeAddToPlaylist,
              onDelete: _songLoeschen,
            ),
          ),
        ),
      ],
    );
  }

  void _zeigeEinstellungen() {
    showDialog(
      context: context,
      builder: (ctx) => AlertDialog(
        backgroundColor: MeloTheme.dunkel1,
        title: const Text('⚙ Einstellungen', style: TextStyle(color: Colors.white, fontSize: 16)),
        content: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            // Stats
            Container(
              padding: const EdgeInsets.all(12),
              margin: const EdgeInsets.only(bottom: 12),
              decoration: BoxDecoration(color: MeloTheme.dunkel2, borderRadius: BorderRadius.circular(10)),
              child: Row(mainAxisAlignment: MainAxisAlignment.spaceAround, children: [
                _statWert('${_vm.songs.length}', 'Songs'),
                _statWert('${(_vm.songs.fold(0, (int s, Song song) => s + song.groesseBytes) / 1048576).toStringAsFixed(1)} MB', 'Größe'),
                _statWert('${(_vm.songs.fold(0, (int s, Song song) => s + song.dauerSekunden) / 60).round()} Min', 'Dauer'),
                _statWert('${_vm.favoritenIds.length}', '❤️'),
              ]),
            ),
            ListTile(
              leading: const Icon(Icons.favorite, color: MeloTheme.rot),
              title: const Text('Favoriten', style: TextStyle(color: Colors.white)),
              subtitle: const Text('Deine Lieblingssongs', style: TextStyle(color: Colors.grey, fontSize: 12)),
              onTap: () {
                Navigator.pop(ctx);
                _vm.aktiveTags = {'★ Favoriten'};
              },
            ),
            ListTile(
              leading: const Icon(Icons.cloud, color: MeloTheme.rot),
              title: const Text('Cloud Sync', style: TextStyle(color: Colors.white)),
              subtitle: const Text('Auto-Sync & Einstellungen', style: TextStyle(color: Colors.grey, fontSize: 12)),
              onTap: () {
                Navigator.pop(ctx);
                showDialog(
                  context: context,
                  builder: (_) => const CloudEinstellungen(),
                );
              },
            ),
            ListTile(
              leading: const Icon(Icons.dns, color: MeloTheme.rot),
              title: const Text('Server verbinden', style: TextStyle(color: Colors.white)),
              subtitle: const Text('Navidrome / Musik-Server', style: TextStyle(color: Colors.grey, fontSize: 12)),
              onTap: () { Navigator.pop(ctx); _zeigeServerBrowser(); },
            ),
            ListTile(
              leading: const Icon(Icons.person, color: MeloTheme.rot),
              title: const Text('Profil', style: TextStyle(color: Colors.white)),
              subtitle: Text(_nutzer.isEmpty ? 'Nicht angemeldet' : _nutzer, style: const TextStyle(color: Colors.grey, fontSize: 12)),
              onTap: () { Navigator.pop(ctx); _zeigeProfil(); },
            ),
            SwitchListTile(
              title: const Text('Diagnosedaten senden', style: TextStyle(color: Colors.white, fontSize: 13)),
              subtitle: const Text('Absturz-Logs & Nutzungsdaten', style: TextStyle(color: Colors.grey, fontSize: 11)),
              value: AppConfig.sendeDiagnosedaten,
              activeColor: MeloTheme.rot,
              onChanged: (v) {
                AppConfig.sendeDiagnosedaten = v;
              },
            ),
            if (Platform.isAndroid)
              ListTile(
                leading: const Icon(Icons.folder_open, color: MeloTheme.rot),
                title: const Text('Voller Speicherzugriff', style: TextStyle(color: Colors.white)),
                subtitle: const Text('Zum Speichern in Downloads/Music', style: TextStyle(color: Colors.grey, fontSize: 12)),
                onTap: () async {
                  final status = await Permission.manageExternalStorage.request();
                  if (status.isGranted) {
                    await SharedPreferences.getInstance().then((p) => p.setBool('manage_storage', true));
                  }
                },
              ),
          ],
        ),
      ),
    );
  }

  Widget _bottomNav() {
    return Container(
      decoration: const BoxDecoration(
        border: Border(top: BorderSide(color: MeloTheme.dunkel1)),
      ),
      child: BottomNavigationBar(
        type: BottomNavigationBarType.fixed,
        backgroundColor: MeloTheme.schwarz,
        selectedItemColor: MeloTheme.rot,
        unselectedItemColor: MeloTheme.textSekundaer,
        currentIndex: _aktiverTab.clamp(0, 3),
        onTap: (i) {
          setState(() => _aktiverTab = i);
          if (i == 0 && _vm.aktiveTags.contains('★ Favoriten')) {
            _vm.aktiveTags.clear();
          } else if (i == 2) {
            // Playlisten öffnen
            _zeigePlaylists();
          }
        },
        items: const [
          BottomNavigationBarItem(icon: Icon(Icons.music_note, size: 22), label: 'Musik'),
          BottomNavigationBarItem(icon: Icon(Icons.add_circle, size: 22), label: 'Lied +'),
          BottomNavigationBarItem(icon: Icon(Icons.queue_music, size: 22), label: 'Playlisten'),
          BottomNavigationBarItem(icon: Icon(Icons.cloud, size: 22), label: 'Cloud'),
        ],
      ),
    );
  }

  /// Hilfs-Widget für Such-Modus-Chips
  Widget _suchChip(String label, bool aktiv, VoidCallback onTap) {
    return GestureDetector(
      onTap: onTap,
      child: Container(
        padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 4),
        decoration: BoxDecoration(
          color: aktiv ? MeloTheme.rot : MeloTheme.dunkel2,
          borderRadius: BorderRadius.circular(12),
        ),
        child: Text(label, style: TextStyle(fontSize: 11, color: aktiv ? Colors.white : MeloTheme.textSekundaer)),
      ),
    );
  }

  /// Banner "💌 Seit 2008" – erscheint nach 10 Playbacks
  Widget _botschaftBanner() {
    return Padding(
      padding: const EdgeInsets.symmetric(horizontal: 20),
      child: Container(
        padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 10),
        decoration: BoxDecoration(
          gradient: const LinearGradient(colors: [Color(0xFF2A0000), Color(0xFF1A0000)]),
          borderRadius: BorderRadius.circular(12),
          border: Border.all(color: MeloTheme.rot.withValues(alpha: 0.4)),
        ),
        child: Row(
          children: [
            const Text('💌', style: TextStyle(fontSize: 20)),
            const SizedBox(width: 10),
            Expanded(
              child: Text(_vm.nutzerBotschaft ?? '🎵 Danke fürs Zuhören!',
                    style: const TextStyle(fontSize: 13, fontWeight: FontWeight.w600, color: Colors.white)),
            ),
            GestureDetector(
              onTap: _vm.botschaftAusblenden,
              child: const Icon(Icons.close, size: 16, color: MeloTheme.textSekundaer),
            ),
          ],
        ),
      ),
    );
  }

  /// Leerer Zustand – wenn keine Songs in der Bibliothek sind
  Widget _emptyStateWidget() {
    return Center(
      child: Padding(
        padding: const EdgeInsets.all(32),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Icon(Icons.library_music_outlined, size: 56, color: MeloTheme.rot.withValues(alpha: 0.5)),
            const SizedBox(height: 16),
            const Text('Noch keine Songs in Melo',
              style: TextStyle(color: Colors.white, fontSize: 16, fontWeight: FontWeight.w600)),
            const SizedBox(height: 8),
            const Text('Füge Songs über "Lied +" hinzu, verbinde deinen Server oder starte einen lokalen Scan.',
              textAlign: TextAlign.center,
              style: TextStyle(color: MeloTheme.textSekundaer, fontSize: 12, height: 1.4)),
            const SizedBox(height: 20),
            ElevatedButton.icon(
              onPressed: _scanMusik,
              icon: const Icon(Icons.search, size: 16),
              label: const Text('Jetzt Musik scannen'),
              style: ElevatedButton.styleFrom(
                backgroundColor: MeloTheme.dunkel1,
                foregroundColor: Colors.white,
                side: const BorderSide(color: MeloTheme.dunkel2),
                shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10)),
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _tagBereich() {
    return AnimatedSize(
      duration: const Duration(milliseconds: 200),
      child: _tagsOffen
          ? TagLeiste(
              tags: _vm.tags,
              aktiveTags: _vm.aktiveTags,
              onTagToggled: _vm.toggleTag,
            )
          : const SizedBox.shrink(),
    );
  }

  Widget _statWert(String wert, String label) {
    return Column(children: [
      Text(wert, style: const TextStyle(color: Colors.white, fontSize: 15, fontWeight: FontWeight.w700)),
      Text(label, style: const TextStyle(color: Colors.grey, fontSize: 10)),
    ]);
  }

  bool _tagsOffen = false;
}