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

import '../estado/estado_radio.dart';
import '../modelos/emisora.dart';
import '../tema/pluriwave_theme.dart';
import 'pluri_glass_surface.dart';
import 'pluri_icon.dart';

/// Tarjeta compacta para mostrar una emisora en listas y grids.
/// Incluye botón de favorito visible en ambos modos.
class TarjetaEmisora extends StatefulWidget {
  final Emisora emisora;
  final VoidCallback? onTap;
  final bool esCompacta;

  const TarjetaEmisora({
    super.key,
    required this.emisora,
    this.onTap,
    this.esCompacta = false,
  });

  @override
  State<TarjetaEmisora> createState() => _TarjetaEmisoraState();
}

class _TarjetaEmisoraState extends State<TarjetaEmisora> {
  bool _toggling = false;

  Future<void> _toggle() async {
    if (_toggling) return;
    setState(() => _toggling = true);
    final estado = context.read<EstadoRadio>();
    final esFav = await estado.toggleFavorito(widget.emisora);
    if (mounted) setState(() => _toggling = false);
    if (mounted) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text(
            esFav
                ? '${widget.emisora.nombre} añadida a favoritos'
                : '${widget.emisora.nombre} eliminada de favoritos',
          ),
          duration: const Duration(seconds: 2),
        ),
      );
    }
  }

  @override
  Widget build(BuildContext context) {
    final t = context.pluriTokens;
    return Semantics(
      button: widget.onTap != null,
      label: 'Emisora ${widget.emisora.nombre}',
      child: PluriGlassSurface(
        padding: EdgeInsets.zero,
        borderRadius: BorderRadius.circular(
          widget.esCompacta ? t.radiusMd : t.radiusLg,
        ),
        child: Material(
          color: Colors.transparent,
          child: InkWell(
            onTap: widget.onTap,
            child: widget.esCompacta ? _buildCompacta() : _buildCompleta(),
          ),
        ),
      ),
    );
  }

  Widget _buildCompleta() {
    final t = context.pluriTokens;
    return Stack(
      children: [
        Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            AspectRatio(
              aspectRatio: 1,
              child: Stack(
                fit: StackFit.expand,
                children: [
                  _logo(60),
                  DecoratedBox(
                    decoration: BoxDecoration(
                      gradient: LinearGradient(
                        begin: Alignment.topCenter,
                        end: Alignment.bottomCenter,
                        colors: [
                          Colors.transparent,
                          Colors.black.withValues(alpha: 0.34),
                        ],
                      ),
                    ),
                  ),
                  Positioned(
                    left: t.spacingSm,
                    bottom: t.spacingSm,
                    child: _LiveBadge(mini: true),
                  ),
                ],
              ),
            ),
            Padding(
              padding: EdgeInsets.fromLTRB(
                t.spacingMd,
                t.spacingSm,
                t.spacingMd,
                t.spacingMd,
              ),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(
                    widget.emisora.nombre,
                    style: Theme.of(context).textTheme.titleSmall?.copyWith(
                      fontWeight: FontWeight.w700,
                    ),
                    maxLines: 2,
                    overflow: TextOverflow.ellipsis,
                  ),
                  if (widget.emisora.pais != null)
                    Padding(
                      padding: EdgeInsets.only(top: t.spacingXs),
                      child: Text(
                        widget.emisora.pais!,
                        style: Theme.of(context).textTheme.bodySmall?.copyWith(
                          color: Theme.of(
                            context,
                          ).colorScheme.onSurface.withValues(alpha: 0.72),
                        ),
                        maxLines: 1,
                        overflow: TextOverflow.ellipsis,
                      ),
                    ),
                ],
              ),
            ),
          ],
        ),
        Positioned(
          top: t.spacingSm,
          right: t.spacingSm,
          child: _botonFavorito(mini: true),
        ),
      ],
    );
  }

  Widget _buildCompacta() {
    final t = context.pluriTokens;
    final subtitulo = [
      widget.emisora.pais,
      widget.emisora.idioma,
    ].where((s) => s != null && s.isNotEmpty).join(' · ');

    return Padding(
      padding: EdgeInsets.symmetric(
        horizontal: t.spacingSm,
        vertical: t.spacingXs,
      ),
      child: Row(
        children: [
          Stack(
            alignment: Alignment.center,
            children: [
              Container(
                width: 58,
                height: 58,
                decoration: BoxDecoration(
                  shape: BoxShape.circle,
                  gradient: SweepGradient(
                    colors: [t.electricMagenta, const Color(0xFF20E6FF), t.warmCoral, t.electricMagenta],
                  ),
                  boxShadow: [BoxShadow(color: t.glowColor.withValues(alpha: 0.24), blurRadius: 22)],
                ),
              ),
              ClipRRect(
                borderRadius: BorderRadius.circular(18),
                child: SizedBox(width: 50, height: 50, child: _logo(24)),
              ),
            ],
          ),
          SizedBox(width: t.spacingSm),
          Expanded(
            child: Column(
              mainAxisSize: MainAxisSize.min,
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  widget.emisora.nombre,
                  style: Theme.of(
                    context,
                  ).textTheme.titleSmall?.copyWith(fontWeight: FontWeight.w700),
                  maxLines: 1,
                  overflow: TextOverflow.ellipsis,
                ),
                if (subtitulo.isNotEmpty)
                  Text(
                    subtitulo,
                    maxLines: 1,
                    overflow: TextOverflow.ellipsis,
                    style: Theme.of(context).textTheme.bodySmall?.copyWith(
                      color: Theme.of(
                        context,
                      ).colorScheme.onSurface.withValues(alpha: 0.72),
                    ),
                  ),
              ],
            ),
          ),
          const SizedBox(width: 8),
          _LiveBadge(mini: false),
          _botonFavorito(mini: false),
        ],
      ),
    );
  }

  Widget _botonFavorito({required bool mini}) {
    final t = context.pluriTokens;
    final esFavorito = context.select<EstadoRadio, bool>(
      (estado) =>
          estado.listaFavoritos.any((e) => e.uuid == widget.emisora.uuid),
    );

    final icono =
        mini
            ? Icon(
              esFavorito
                  ? Icons.favorite_rounded
                  : Icons.favorite_outline_rounded,
              color:
                  esFavorito
                      ? t.warmCoral
                      : Colors.white.withValues(alpha: 0.82),
              size: 18,
            )
            : PluriIcon(
              glyph: PluriIconGlyph.favorites,
              variant:
                  esFavorito
                      ? PluriIconVariant.activeGlow
                      : PluriIconVariant.outline,
              size: 20,
              semanticLabel:
                  esFavorito ? 'Quitar de favoritos' : 'Añadir a favoritos',
            );

    return Semantics(
      button: true,
      toggled: esFavorito,
      label: esFavorito ? 'Quitar de favoritos' : 'Añadir a favoritos',
      child: Material(
        color: mini ? t.glassSurface : Colors.transparent,
        shape: const CircleBorder(),
        child: InkWell(
          customBorder: const CircleBorder(),
          onTap: _toggling ? null : _toggle,
          child: SizedBox(
            width: mini ? 36 : 44,
            height: mini ? 36 : 44,
            child: Center(child: icono),
          ),
        ),
      ),
    );
  }

  Widget _logo(double iconSize) {
    if (widget.emisora.favicon != null && widget.emisora.favicon!.isNotEmpty) {
      return CachedNetworkImage(
        imageUrl: widget.emisora.favicon!,
        fit: BoxFit.cover,
        placeholder: (_, __) => _shimmer(),
        errorWidget: (_, __, ___) => _iconoFallback(iconSize),
      );
    }
    return _iconoFallback(iconSize);
  }

  Widget _shimmer() {
    final theme = Theme.of(context);
    return Shimmer.fromColors(
      baseColor: theme.colorScheme.surfaceContainerHighest,
      highlightColor: theme.colorScheme.surface,
      child: Container(color: theme.colorScheme.surfaceContainerHighest),
    );
  }

  Widget _iconoFallback(double size) {
    final art = _fallbackArtFor(widget.emisora.uuid);
    return Stack(
      fit: StackFit.expand,
      children: [
        Image.asset(
          art,
          fit: BoxFit.cover,
          errorBuilder: (_, __, ___) => DecoratedBox(
            decoration: BoxDecoration(
              gradient: LinearGradient(
                begin: Alignment.topLeft,
                end: Alignment.bottomRight,
                colors: [
                  context.pluriTokens.deepViolet,
                  context.pluriTokens.electricMagenta.withValues(alpha: 0.8),
                ],
              ),
            ),
          ),
        ),
        Center(
          child: PluriIcon(
            glyph: PluriIconGlyph.player,
            variant: PluriIconVariant.activeGlow,
            size: size,
            semanticLabel: 'Icono de emisora',
          ),
        ),
      ],
    );
  }

  String _fallbackArtFor(String seed) {
    const arts = [
      'assets/images/station_art_aurora.png',
      'assets/images/station_art_cosmic.png',
      'assets/images/station_art_pulse.png',
      'assets/images/station_art_nova.png',
    ];
    final index = seed.codeUnits.fold<int>(0, (a, b) => a + b) % arts.length;
    return arts[index];
  }
}

class _LiveBadge extends StatelessWidget {
  const _LiveBadge({required this.mini});

  final bool mini;

  @override
  Widget build(BuildContext context) {
    final color = Theme.of(context).colorScheme.secondary;
    return Container(
      padding: EdgeInsets.symmetric(horizontal: mini ? 8 : 6, vertical: mini ? 5 : 4),
      decoration: BoxDecoration(
        borderRadius: BorderRadius.circular(999),
        color: Colors.black.withValues(alpha: 0.35),
        border: Border.all(color: color.withValues(alpha: 0.48)),
      ),
      child: Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          Icon(Icons.fiber_manual_record_rounded, size: mini ? 10 : 8, color: color),
          if (mini) ...[
            const SizedBox(width: 5),
            Text('Live', style: Theme.of(context).textTheme.labelSmall?.copyWith(fontWeight: FontWeight.w900)),
          ],
        ],
      ),
    );
  }
}

/// Placeholder shimmer para listas en carga.
class TarjetaEmisoraShimmer extends StatelessWidget {
  const TarjetaEmisoraShimmer({super.key});

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    return Shimmer.fromColors(
      baseColor: theme.colorScheme.surfaceContainerHighest,
      highlightColor: theme.colorScheme.surface,
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          AspectRatio(
            aspectRatio: 1,
            child: Container(color: theme.colorScheme.surfaceContainerHighest),
          ),
          const SizedBox(height: 8),
          Container(
            height: 14,
            color: theme.colorScheme.surfaceContainerHighest,
          ),
          const SizedBox(height: 4),
          Container(
            height: 12,
            width: 60,
            color: theme.colorScheme.surfaceContainerHighest,
          ),
        ],
      ),
    );
  }
}