import 'package:flutter/material.dart';
import 'package:farolero/l10n/generated/app_localizations.dart';
import 'package:provider/provider.dart';
import '../servicios/servicio_idioma.dart';
import '../servicios/servicio_perfil_usuario.dart';
import '../tema/componentes_farolero.dart';
import '../tema/tema_app.dart';

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

  @override
  State<PantallaAjustes> createState() => _PantallaAjustesState();
}

class _PantallaAjustesState extends State<PantallaAjustes> {
  double _volumen = 0.7;
  bool _vibracion = true;

  @override
  Widget build(BuildContext context) {
    final l10n = AppLocalizations.of(context)!;
    final servicioIdioma = context.watch<ServicioIdioma>();
    final perfil = context.watch<ServicioPerfilUsuario>().perfil;

    return Scaffold(
      appBar: AppBar(title: Text(l10n.settingsTitle)),
      body: FondoFarolero(
        child: SingleChildScrollView(
          padding: const EdgeInsets.all(16),
          child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Card(
              child: ListTile(
                leading: AvatarFarolero(
                  texto: perfil.nombre.substring(0, 1).toUpperCase(),
                  assetPath: perfil.avatarAsset,
                  size: 48,
                ),
                title: Text(perfil.nombre),
                subtitle: Text('@${perfil.nick}'),
                trailing: const Icon(Icons.edit),
                onTap: () => _editarPerfil(context),
              ),
            ),
            const SizedBox(height: 12),

            // Selector de idioma
            Card(
              child: Padding(
                padding: const EdgeInsets.all(16),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(l10n.language,
                        style: Theme.of(context).textTheme.titleLarge),
                    const SizedBox(height: 12),
                    // Opción automática (sistema)
                    _opcionIdioma(
                      context,
                      bandera: '🌐',
                      nombre: 'Auto (${_nombreIdiomaDelSistema()})',
                      codigo: 'sistema',
                      seleccionado: servicioIdioma.codigoActual == 'sistema',
                      onTap: () => servicioIdioma.cambiarIdioma('sistema'),
                    ),
                    const Divider(height: 1),
                    // Lista de idiomas
                    ...ServicioIdioma.idiomasSoportados.entries.map((entrada) {
                      return _opcionIdioma(
                        context,
                        bandera: entrada.value.bandera,
                        nombre: entrada.value.nombre,
                        codigo: entrada.key,
                        seleccionado:
                            servicioIdioma.codigoActual == entrada.key,
                        onTap: () =>
                            servicioIdioma.cambiarIdioma(entrada.key),
                      );
                    }),
                  ],
                ),
              ),
            ),
            const SizedBox(height: 12),

            // Volumen de efectos de sonido
            Card(
              child: Padding(
                padding: const EdgeInsets.all(16),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(l10n.soundVolume,
                        style: Theme.of(context).textTheme.titleLarge),
                    const SizedBox(height: 8),
                    Slider(
                      value: _volumen,
                      onChanged: (v) => setState(() => _volumen = v),
                      activeColor: TemaApp.colorAcento,
                      inactiveColor: TemaApp.colorTarjeta,
                    ),
                  ],
                ),
              ),
            ),
            const SizedBox(height: 12),

            // Vibración
            Card(
              child: SwitchListTile(
                title: Text(l10n.vibration),
                value: _vibracion,
                onChanged: (v) => setState(() => _vibracion = v),
                contentPadding:
                    const EdgeInsets.symmetric(horizontal: 16, vertical: 4),
              ),
            ),
            const SizedBox(height: 12),

            // Acerca de
            Card(
              child: Padding(
                padding: const EdgeInsets.all(16),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(l10n.about,
                        style: Theme.of(context).textTheme.titleLarge),
                    const SizedBox(height: 12),
                    _filaInfo(context, l10n.version, '1.0.0'),
                    const SizedBox(height: 8),
                    _filaInfo(context, l10n.developer, 'FreeTTimeLab'),
                    const SizedBox(height: 8),
                    SizedBox(
                      width: double.infinity,
                      child: OutlinedButton(
                        onPressed: () {
                          showLicensePage(
                            context: context,
                            applicationName: 'Farolero',
                            applicationVersion: '1.0.0',
                          );
                        },
                        child: Text(l10n.licenses),
                      ),
                    ),
                  ],
                ),
              ),
            ),
            const SizedBox(height: 16),
          ],
          ),
        ),
      ),
    );
  }

  Widget _opcionIdioma(
    BuildContext context, {
    required String bandera,
    required String nombre,
    required String codigo,
    required bool seleccionado,
    required VoidCallback onTap,
  }) {
    return ListTile(
      leading: Text(bandera, style: const TextStyle(fontSize: 24)),
      title: Text(nombre),
      trailing: seleccionado
          ? const Icon(Icons.check_circle, color: TemaApp.colorAcento)
          : null,
      onTap: onTap,
      dense: true,
      selected: seleccionado,
      selectedTileColor: TemaApp.colorAcento.withValues(alpha: 0.1),
      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
    );
  }

  Widget _filaInfo(BuildContext context, String etiqueta, String valor) {
    return Row(
      mainAxisAlignment: MainAxisAlignment.spaceBetween,
      children: [
        Text(etiqueta, style: Theme.of(context).textTheme.bodyMedium),
        Text(valor, style: Theme.of(context).textTheme.bodyLarge),
      ],
    );
  }

  Future<void> _editarPerfil(BuildContext context) async {
    final servicioPerfil = context.read<ServicioPerfilUsuario>();
    final actual = servicioPerfil.perfil;
    final nombreController = TextEditingController(text: actual.nombre);
    final nickController = TextEditingController(text: actual.nick);
    var avatarSeleccionado = actual.avatarAsset;

    await showDialog<void>(
      context: context,
      builder: (ctx) => StatefulBuilder(
        builder: (ctx, setDialogState) => AlertDialog(
          title: const Text('Perfil del dispositivo'),
          content: SizedBox(
            width: 420,
            child: SingleChildScrollView(
              child: Column(
                mainAxisSize: MainAxisSize.min,
                children: [
                  TextField(
                    controller: nombreController,
                    textCapitalization: TextCapitalization.words,
                    decoration: const InputDecoration(
                      labelText: 'Nombre',
                      prefixIcon: Icon(Icons.person),
                    ),
                  ),
                  const SizedBox(height: 12),
                  TextField(
                    controller: nickController,
                    decoration: const InputDecoration(
                      labelText: 'Nick',
                      prefixIcon: Icon(Icons.alternate_email),
                    ),
                  ),
                  const SizedBox(height: 16),
                  GridView.builder(
                    shrinkWrap: true,
                    physics: const NeverScrollableScrollPhysics(),
                    gridDelegate:
                        const SliverGridDelegateWithFixedCrossAxisCount(
                      crossAxisCount: 5,
                      mainAxisSpacing: 8,
                      crossAxisSpacing: 8,
                    ),
                    itemCount: ServicioPerfilUsuario.avatares.length,
                    itemBuilder: (context, index) {
                      final avatar = ServicioPerfilUsuario.avatares[index];
                      final seleccionado = avatar == avatarSeleccionado;
                      return InkWell(
                        borderRadius: BorderRadius.circular(999),
                        onTap: () => setDialogState(
                          () => avatarSeleccionado = avatar,
                        ),
                        child: Container(
                          decoration: BoxDecoration(
                            shape: BoxShape.circle,
                            border: Border.all(
                              color: seleccionado
                                  ? TemaApp.colorNaranja
                                  : Colors.transparent,
                              width: 3,
                            ),
                          ),
                          child: AvatarFarolero(
                            texto: '',
                            assetPath: avatar,
                            size: 48,
                          ),
                        ),
                      );
                    },
                  ),
                ],
              ),
            ),
          ),
          actions: [
            TextButton(
              onPressed: () => Navigator.pop(ctx),
              child: const Text('Cancelar'),
            ),
            TextButton(
              onPressed: () async {
                await servicioPerfil.guardar(
                  nombre: nombreController.text,
                  nick: nickController.text,
                  avatarAsset: avatarSeleccionado,
                );
                if (ctx.mounted) Navigator.pop(ctx);
              },
              child: const Text('Guardar'),
            ),
          ],
        ),
      ),
    );

    nombreController.dispose();
    nickController.dispose();
  }

  String _nombreIdiomaDelSistema() {
    final locale = WidgetsBinding.instance.platformDispatcher.locale;
    final codigo = locale.countryCode != null && locale.countryCode!.isNotEmpty
        ? '${locale.languageCode}_${locale.countryCode}'
        : locale.languageCode;
    final info = ServicioIdioma.idiomasSoportados[codigo] ??
        ServicioIdioma.idiomasSoportados[locale.languageCode];
    return info?.nombre ?? locale.languageCode;
  }
}