pluriwave/lib/widgets/tarjeta_emisora.dart

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

/// Tarjeta compacta para mostrar una emisora en listas y grids.
class TarjetaEmisora extends StatelessWidget {
  final Emisora emisora;
  final VoidCallback? onTap;
  final bool esCompacta;

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

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    return Card(
      clipBehavior: Clip.antiAlias,
      child: InkWell(
        onTap: onTap,
        child: esCompacta ? _buildCompacta(theme) : _buildCompleta(theme),
      ),
    );
  }

  Widget _buildCompleta(ThemeData theme) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        AspectRatio(
          aspectRatio: 1,
          child: _logo(theme, 60),
        ),
        Padding(
          padding: const EdgeInsets.all(8),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Text(
                emisora.nombre,
                style: theme.textTheme.bodyMedium?.copyWith(fontWeight: FontWeight.bold),
                maxLines: 2,
                overflow: TextOverflow.ellipsis,
              ),
              if (emisora.pais != null)
                Text(
                  emisora.pais!,
                  style: theme.textTheme.bodySmall?.copyWith(
                    color: theme.colorScheme.onSurfaceVariant,
                  ),
                  maxLines: 1,
                  overflow: TextOverflow.ellipsis,
                ),
            ],
          ),
        ),
      ],
    );
  }

  Widget _buildCompacta(ThemeData theme) {
    return ListTile(
      leading: SizedBox(width: 48, height: 48, child: _logo(theme, 24)),
      title: Text(
        emisora.nombre,
        maxLines: 1,
        overflow: TextOverflow.ellipsis,
      ),
      subtitle: Text(
        [emisora.pais, emisora.idioma].where((s) => s != null).join(' · '),
        maxLines: 1,
        overflow: TextOverflow.ellipsis,
      ),
    );
  }

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

  Widget _shimmer(ThemeData theme) {
    return Shimmer.fromColors(
      baseColor: theme.colorScheme.surfaceContainerHighest,
      highlightColor: theme.colorScheme.surface,
      child: Container(color: theme.colorScheme.surfaceContainerHighest),
    );
  }

  Widget _iconoFallback(ThemeData theme, double size) {
    return Container(
      color: theme.colorScheme.primaryContainer,
      child: Icon(Icons.radio, size: size, color: theme.colorScheme.onPrimaryContainer),
    );
  }
}

/// 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),
        ],
      ),
    );
  }
}