/// Album Details Page - Mobile Layout
library;

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

import '../../../core/theme/colors.dart';
import '../../providers/album_provider.dart';
import '../../providers/music_provider.dart';
import '../../../domain/entities/track.dart';
import '../../widgets/album/album_widgets.dart';
import '../common/cached_network_image_with_fallback.dart';

class AlbumMobilePage extends ConsumerStatefulWidget {
  final String albumId;

  const AlbumMobilePage({
    required this.albumId,
    super.key,
  });

  @override
  ConsumerState<AlbumMobilePage> createState() => _AlbumMobilePageState();
}

class _AlbumMobilePageState extends ConsumerState<AlbumMobilePage> {
  @override
  void initState() {
    super.initState();
    // Load album data
    Future.microtask(() {
      ref.read(albumProvider.notifier).loadAlbum(widget.albumId);
    });
  }

  @override
  Widget build(BuildContext context) {
    final albumState = ref.watch(albumProvider);

    if (albumState.isLoading && albumState.album == null) {
      return _buildLoadingState();
    }

    if (albumState.error != null && albumState.album == null) {
      return _buildErrorState(albumState.error!);
    }

    if (albumState.album == null) {
      return _buildEmptyState();
    }

    return CustomScrollView(
      slivers: [
        // Hero header
        _buildHeroHeader(albumState.album!),

        // Action buttons
        _buildActionButtons(albumState.tracks),

        // Album info
        _buildAlbumInfo(albumState),

        // Tracklist
        if (albumState.tracks.isNotEmpty)
          _buildTracklistSection(albumState.tracks),

        // Bottom spacing
        const SliverToBoxAdapter(
          child: SizedBox(height: 100),
        ),
      ],
    );
  }

  Widget _buildLoadingState() {
    return const Center(
      child: CircularProgressIndicator(color: AppColors.cyan),
    );
  }

  Widget _buildErrorState(String error) {
    return Center(
      child: Padding(
        padding: const EdgeInsets.all(24),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            const Icon(
              Icons.error_outline,
              size: 64,
              color: AppColors.error,
            ),
            const SizedBox(height: 16),
            const Text(
              'Something went wrong',
              style: TextStyle(
                fontSize: 18,
                color: AppColors.error,
                fontWeight: FontWeight.w600,
              ),
            ),
            const SizedBox(height: 8),
            Text(
              error,
              style: const TextStyle(
                fontSize: 14,
                color: AppColors.muted,
              ),
              textAlign: TextAlign.center,
            ),
            const SizedBox(height: 24),
            ElevatedButton(
              onPressed: () {
                ref.read(albumProvider.notifier).loadAlbum(widget.albumId);
              },
              child: const Text('Retry'),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildEmptyState() {
    return const Center(
      child: CircularProgressIndicator(color: AppColors.cyan),
    );
  }

  Widget _buildHeroHeader(album) {
    return SliverToBoxAdapter(
      child: Stack(
        children: [
          // Background gradient
          Container(
            height: 400,
            decoration: BoxDecoration(
              gradient: LinearGradient(
                begin: Alignment.topCenter,
                end: Alignment.bottomCenter,
                colors: [
                  AppColors.violet.withOpacity(0.3),
                  AppColors.primary,
                ],
              ),
            ),
          ),

          // Album art background (blurred)
          if (album.imageUrl != null)
            Positioned.fill(
              child: Opacity(
                opacity: 0.15,
                child: Image.network(
                  album.imageUrl!,
                  fit: BoxFit.cover,
                ),
              ),
            ),

          // Content
          SizedBox(
            height: 400,
            child: SafeArea(
              child: Padding(
                padding: const EdgeInsets.all(16),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    // Back button
                    IconButton(
                      icon: const Icon(Icons.arrow_back,
                          color: AppColors.onBackground),
                      onPressed: () => Navigator.of(context).pop(),
                    ),

                    const Spacer(),

                    // Album art
                    Center(
                      child: Hero(
                        tag: 'album_art_${album.id}',
                        child: Container(
                          decoration: BoxDecoration(
                            boxShadow: AppColors.cyanGlow,
                            borderRadius: BorderRadius.circular(8),
                          ),
                          child: ClipRRect(
                            borderRadius: BorderRadius.circular(8),
                            child: CachedNetworkImageWithFallback(
                              imageUrl: album.imageUrl,
                              fallbackIcon: Icons.album,
                              progressColor: AppColors.cyan,
                              width: 240,
                              height: 240,
                              fit: BoxFit.cover,
                            ),
                          ),
                        ),
                      ),
                    ),

                    const SizedBox(height: 24),

                    // Album title
                    Text(
                      album.title,
                      style: const TextStyle(
                        fontSize: 26,
                        fontWeight: FontWeight.bold,
                        color: AppColors.onBackground,
                      ),
                      maxLines: 2,
                      overflow: TextOverflow.ellipsis,
                      textAlign: TextAlign.center,
                    ),

                    const SizedBox(height: 8),

                    // Artist name and year
                    if (album.artist != null)
                      Text(
                        '${album.artist!.name}${album.releaseDate != null ? ' • ${album.releaseDate!.year}' : ''}',
                        style: const TextStyle(
                          fontSize: 15,
                          color: AppColors.onSurfaceVariant,
                          fontWeight: FontWeight.w500,
                        ),
                        maxLines: 1,
                        overflow: TextOverflow.ellipsis,
                        textAlign: TextAlign.center,
                      ),

                    const SizedBox(height: 24),
                  ],
                ),
              ),
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildActionButtons(List<Track> tracks) {
    return SliverToBoxAdapter(
      child: Padding(
        padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
        child: Row(
          children: [
            // Play All button
            Expanded(
              child: SizedBox(
                height: 48,
                child: ElevatedButton.icon(
                  onPressed: tracks.isNotEmpty
                      ? () {
                          final albumNotifier = ref.read(albumProvider.notifier);
                          final playerNotifier = ref.read(playerProvider.notifier);
                          albumNotifier.playAll(playerNotifier);
                        }
                      : null,
                  icon: const Icon(Icons.play_arrow, size: 24),
                  label: const Text('Play All',
                      style: TextStyle(fontSize: 15, fontWeight: FontWeight.w600)),
                  style: ElevatedButton.styleFrom(
                    backgroundColor: AppColors.cyan,
                    foregroundColor: AppColors.primary,
                    shape: RoundedRectangleBorder(
                      borderRadius: BorderRadius.circular(24),
                    ),
                    elevation: 0,
                  ),
                ),
              ),
            ),

            const SizedBox(width: 12),

            // Shuffle button
            Container(
              decoration: BoxDecoration(
                shape: BoxShape.circle,
                gradient: const LinearGradient(
                  begin: Alignment.topLeft,
                  end: Alignment.bottomRight,
                  colors: [AppColors.violet, AppColors.rose],
                ),
                boxShadow: AppColors.violetGlow,
              ),
              child: IconButton(
                icon: const Icon(Icons.shuffle, size: 20),
                color: AppColors.onBackground,
                onPressed: tracks.isNotEmpty
                    ? () {
                        final albumNotifier = ref.read(albumProvider.notifier);
                        final playerNotifier = ref.read(playerProvider.notifier);
                        albumNotifier.shuffle(playerNotifier);
                      }
                    : null,
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildAlbumInfo(albumState) {
    final album = albumState.album!;
    final tracks = albumState.tracks;

    return SliverToBoxAdapter(
      child: Padding(
        padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
        child: Row(
          children: [
            if (album.totalTracks > 0)
              _buildInfoChip('${album.totalTracks} ${album.totalTracks == 1 ? 'track' : 'tracks'}'),
            if (album.totalTracks > 0 && albumState.totalDuration > 0)
              const SizedBox(width: 8),
            if (albumState.totalDuration > 0)
              _buildInfoChip(albumState.formattedTotalDuration),
            if (album.genre != null) ...[
              const SizedBox(width: 8),
              _buildInfoChip(album.genre!, isGenre: true),
            ],
          ],
        ),
      ),
    );
  }

  Widget _buildInfoChip(String text, {bool isGenre = false}) {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
      decoration: BoxDecoration(
        color: isGenre
            ? AppColors.violet.withOpacity(0.2)
            : AppColors.surfaceVariant,
        borderRadius: BorderRadius.circular(16),
        border: Border.all(
          color: isGenre
              ? AppColors.violet.withOpacity(0.5)
              : AppColors.cyan.withOpacity(0.2),
        ),
      ),
      child: Text(
        text,
        style: TextStyle(
          color: isGenre ? AppColors.violet : AppColors.onSurfaceVariant,
          fontSize: 12,
          fontWeight: FontWeight.w500,
        ),
      ),
    );
  }

  Widget _buildTracklistSection(List<Track> tracks) {
    return SliverToBoxAdapter(
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          const Padding(
            padding: EdgeInsets.fromLTRB(16, 24, 16, 12),
            child: Text(
              'Tracklist',
              style: TextStyle(
                fontSize: 22,
                fontWeight: FontWeight.bold,
                color: AppColors.onBackground,
              ),
            ),
          ),
          ...tracks.asMap().entries.map((entry) {
            final index = entry.key;
            final track = entry.value;
            return AlbumTrackTile(
              track: track,
              index: index,
              onTap: () => _playTrack(track, index),
            );
          }),
          const SizedBox(height: 24),
        ],
      ),
    );
  }

  void _playTrack(Track track, int index) {
    final albumNotifier = ref.read(albumProvider.notifier);
    final playerNotifier = ref.read(playerProvider.notifier);
    albumNotifier.playTrack(playerNotifier, track);
  }
}