import 'dart:io';

import 'package:cached_network_image/cached_network_image.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:worldhopper/l10n/app_localizations.dart';
import 'package:worldhopper/models/downloaded_series.dart';
import 'package:worldhopper/providers/download_provider.dart';
import 'package:worldhopper/services/series_download_service.dart'
    as download_service;

/// Card for displaying a downloaded series in the library
class DownloadedSeriesCard extends ConsumerWidget {
  final DownloadedSeries series;
  final VoidCallback onTap;
  final VoidCallback? onLongPress;

  const DownloadedSeriesCard({
    super.key,
    required this.series,
    required this.onTap,
    this.onLongPress,
  });

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final l10n = AppLocalizations.of(context);

    // Watch live progress for this specific series
    final progressAsync = ref.watch(activeDownloadProgressProvider);
    final liveProgress = progressAsync.whenOrNull(
      data: (progress) => progress.seriesId == series.id ? progress : null,
    );

    final isActivelyDownloading = liveProgress != null &&
        liveProgress.status == DownloadStatus.downloading;

    final chaptersAsync = ref.watch(downloadedChaptersProvider(series.id));
    final failedCount = chaptersAsync.whenOrNull(
          data: (chapters) =>
              chapters.where((c) => c.status == DownloadStatus.failed).length,
        ) ??
        0;

    return Card(
      clipBehavior: Clip.antiAlias,
      child: InkWell(
        onTap: onTap,
        onLongPress: onLongPress,
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            // Cover image with overlays
            Expanded(
              child: Stack(
                fit: StackFit.expand,
                children: [
                  _buildCover(context),
                  _buildStatusBadge(context),
                  if (isActivelyDownloading)
                    _buildDownloadOverlay(context, liveProgress),
                ],
              ),
            ),

            // Title and metadata
            Padding(
              padding: const EdgeInsets.all(8),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(
                    series.title,
                    style: Theme.of(context).textTheme.bodyMedium?.copyWith(
                          fontWeight: FontWeight.bold,
                        ),
                    maxLines: 2,
                    overflow: TextOverflow.ellipsis,
                  ),
                  const SizedBox(height: 4),
                  Row(
                    children: [
                      Icon(
                        Icons.auto_stories,
                        size: 14,
                        color: Theme.of(context).colorScheme.primary,
                      ),
                      const SizedBox(width: 4),
                      Expanded(
                        child: Text(
                          l10n.downloadChaptersCount(
                            series.downloadedChaptersCount,
                            series.totalChapters,
                          ),
                          style: Theme.of(context)
                              .textTheme
                              .bodySmall
                              ?.copyWith(
                                color: Theme.of(context).colorScheme.primary,
                              ),
                          maxLines: 1,
                          overflow: TextOverflow.ellipsis,
                        ),
                      ),
                    ],
                  ),
                  if (failedCount > 0) ...[
                    const SizedBox(height: 2),
                    Row(
                      children: [
                        const Icon(
                          Icons.error_outline,
                          size: 14,
                          color: Colors.red,
                        ),
                        const SizedBox(width: 4),
                        Expanded(
                          child: Text(
                            l10n.downloadFailedCount(failedCount),
                            style:
                                Theme.of(context).textTheme.bodySmall?.copyWith(
                                      color: Colors.red,
                                    ),
                            maxLines: 1,
                            overflow: TextOverflow.ellipsis,
                          ),
                        ),
                      ],
                    ),
                  ],
                ],
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildCover(BuildContext context) {
    // Try local path first, then network URL
    if (series.coverPath != null) {
      return Image.file(
        File(series.coverPath!),
        fit: BoxFit.cover,
        errorBuilder: (_, __, ___) => _buildPlaceholder(context),
      );
    }
    if (series.thumbnailUrl != null || series.coverUrl != null) {
      return CachedNetworkImage(
        imageUrl: series.thumbnailUrl ?? series.coverUrl!,
        fit: BoxFit.cover,
        placeholder: (_, __) => _buildPlaceholder(context),
        errorWidget: (_, __, ___) => _buildPlaceholder(context),
      );
    }
    return _buildPlaceholder(context);
  }

  Widget _buildPlaceholder(BuildContext context) {
    return Container(
      color: Theme.of(context).colorScheme.surfaceContainerHighest,
      child: Center(
        child: Icon(
          Icons.download_done,
          size: 48,
          color: Theme.of(context).colorScheme.onSurface.withValues(alpha: 0.3),
        ),
      ),
    );
  }

  Widget _buildStatusBadge(BuildContext context) {
    if (series.isComplete) {
      return Positioned(
        top: 6,
        right: 6,
        child: Container(
          padding: const EdgeInsets.all(4),
          decoration: BoxDecoration(
            color: Colors.green,
            shape: BoxShape.circle,
            boxShadow: [
              BoxShadow(
                color: Colors.black.withValues(alpha: 0.3),
                blurRadius: 4,
                offset: const Offset(0, 2),
              ),
            ],
          ),
          child: const Icon(Icons.download_done, size: 14, color: Colors.white),
        ),
      );
    }
    if (series.isDownloading) {
      return Positioned(
        top: 6,
        right: 6,
        child: Container(
          padding: const EdgeInsets.all(4),
          decoration: BoxDecoration(
            color: Colors.blue,
            shape: BoxShape.circle,
            boxShadow: [
              BoxShadow(
                color: Colors.black.withValues(alpha: 0.3),
                blurRadius: 4,
                offset: const Offset(0, 2),
              ),
            ],
          ),
          child: const SizedBox(
            width: 14,
            height: 14,
            child: CircularProgressIndicator(
              strokeWidth: 2,
              color: Colors.white,
            ),
          ),
        ),
      );
    }
    return const SizedBox.shrink();
  }

  Widget _buildDownloadOverlay(
      BuildContext context, download_service.DownloadProgress progress) {
    return Positioned(
      bottom: 0,
      left: 0,
      right: 0,
      child: Container(
        color: Colors.black.withValues(alpha: 0.7),
        padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 6),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            if (progress.chapterTitle != null)
              Text(
                progress.chapterTitle!,
                style: Theme.of(context).textTheme.bodySmall?.copyWith(
                      color: Colors.white,
                    ),
                maxLines: 1,
                overflow: TextOverflow.ellipsis,
              ),
            const SizedBox(height: 4),
            LinearProgressIndicator(
              value: progress.chapterProgress > 0
                  ? progress.chapterProgress
                  : null,
              minHeight: 3,
            ),
          ],
        ),
      ),
    );
  }
}