import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:media_kit_video/media_kit_video.dart';
import 'package:mirror_protocol/mirror_protocol.dart';
import 'package:mirror_ui/mirror_ui.dart';
import '../providers/display_state_provider.dart';
import '../providers/player_provider.dart';

class MediaScreen extends ConsumerWidget {
  const MediaScreen({super.key});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final playback = ref.watch(displayStateProvider.select((s) => s.playback));
    final spotify = ref.watch(displayStateProvider.select((s) => s.spotify));

    // Spotify playback
    if (spotify != null && spotify.trackName != null) {
      return _buildSpotify(context, spotify);
    }

    // Video playback (YouTube / Plex)
    if (playback != null && playback.source != MediaSource.workout) {
      return _buildVideoPlayback(context, ref, playback);
    }

    // Nothing playing
    return Container(
      color: MirrorTheme.background,
      width: double.infinity,
      height: double.infinity,
      child: Center(
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            Icon(Icons.music_note, size: 64, color: MirrorTheme.textMuted),
            const SizedBox(height: 24),
            Text(
              'Nothing playing',
              style: Theme.of(context).textTheme.bodyLarge?.copyWith(
                    color: MirrorTheme.textMuted,
                  ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildSpotify(BuildContext context, SpotifyState spotify) {
    final progress = spotify.durationMs > 0
        ? spotify.progressMs / spotify.durationMs
        : 0.0;

    return Container(
      color: MirrorTheme.background,
      width: double.infinity,
      height: double.infinity,
      child: Center(
        child: Padding(
          padding: const EdgeInsets.symmetric(horizontal: 80),
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              // Source indicator
              Row(
                mainAxisSize: MainAxisSize.min,
                children: [
                  Icon(Icons.music_note, size: 20, color: MirrorTheme.accent),
                  const SizedBox(width: 8),
                  Text(
                    'SPOTIFY',
                    style: Theme.of(context).textTheme.bodyMedium?.copyWith(
                          color: MirrorTheme.accent,
                          letterSpacing: 2,
                        ),
                  ),
                ],
              ),
              const SizedBox(height: 40),
              // Album art
              if (spotify.albumImageUrl != null)
                ClipRRect(
                  borderRadius: BorderRadius.circular(24),
                  child: Image.network(
                    spotify.albumImageUrl!,
                    width: 400,
                    height: 400,
                    fit: BoxFit.cover,
                    errorBuilder: (_, __, ___) => _albumArtPlaceholder(),
                  ),
                )
              else
                _albumArtPlaceholder(),
              const SizedBox(height: 60),
              // Track name
              Text(
                spotify.trackName ?? '',
                style: Theme.of(context).textTheme.headlineLarge,
                textAlign: TextAlign.center,
                maxLines: 2,
                overflow: TextOverflow.ellipsis,
              ),
              const SizedBox(height: 12),
              // Artist name
              Text(
                spotify.artistName ?? '',
                style: Theme.of(context).textTheme.bodyLarge?.copyWith(
                      color: MirrorTheme.textSecondary,
                    ),
                textAlign: TextAlign.center,
              ),
              const SizedBox(height: 40),
              // Progress bar
              ClipRRect(
                borderRadius: BorderRadius.circular(2),
                child: LinearProgressIndicator(
                  value: progress,
                  minHeight: 4,
                  backgroundColor: MirrorTheme.surfaceLight,
                  color: MirrorTheme.accent,
                ),
              ),
              const SizedBox(height: 12),
              Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: [
                  Text(
                    _formatDuration(Duration(milliseconds: spotify.progressMs)),
                    style: Theme.of(context).textTheme.bodySmall?.copyWith(
                          fontFamily: MirrorTheme.fontMono,
                        ),
                  ),
                  Text(
                    _formatDuration(Duration(milliseconds: spotify.durationMs)),
                    style: Theme.of(context).textTheme.bodySmall?.copyWith(
                          fontFamily: MirrorTheme.fontMono,
                        ),
                  ),
                ],
              ),
              const SizedBox(height: 40),
              Icon(
                spotify.isPlaying ? Icons.pause_circle_filled : Icons.play_circle_filled,
                size: 72,
                color: MirrorTheme.textPrimary,
              ),
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildVideoPlayback(BuildContext context, WidgetRef ref, PlaybackState playback) {
    final progress = playback.duration.inMilliseconds > 0
        ? playback.position.inMilliseconds / playback.duration.inMilliseconds
        : 0.0;

    return Container(
      color: Colors.black,
      width: double.infinity,
      height: double.infinity,
      child: Stack(
        children: [
          // Video output
          Consumer(
            builder: (context, ref, _) {
              final controller = ref.watch(videoControllerProvider);
              return Video(controller: controller);
            },
          ),

          // Paused indicator
          if (!playback.isPlaying)
            const Center(
              child: Icon(Icons.pause_circle_filled, size: 120, color: Colors.white70),
            ),

          // Source indicator top-left
          Positioned(
            top: 30,
            left: 30,
            child: Container(
              padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
              decoration: BoxDecoration(
                color: Colors.black54,
                borderRadius: BorderRadius.circular(8),
              ),
              child: Row(
                mainAxisSize: MainAxisSize.min,
                children: [
                  Icon(
                    _sourceIcon(playback.source),
                    size: 18,
                    color: MirrorTheme.accent,
                  ),
                  const SizedBox(width: 8),
                  Text(
                    playback.source.toJson().toUpperCase(),
                    style: Theme.of(context).textTheme.bodySmall?.copyWith(
                          color: MirrorTheme.accent,
                          letterSpacing: 1,
                        ),
                  ),
                ],
              ),
            ),
          ),

          // Bottom overlay
          Positioned(
            bottom: 0,
            left: 0,
            right: 0,
            child: Container(
              padding: const EdgeInsets.all(40),
              decoration: const BoxDecoration(
                gradient: LinearGradient(
                  begin: Alignment.topCenter,
                  end: Alignment.bottomCenter,
                  colors: [Colors.transparent, Colors.black87],
                ),
              ),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                mainAxisSize: MainAxisSize.min,
                children: [
                  Text(
                    playback.title,
                    style: Theme.of(context).textTheme.headlineMedium,
                  ),
                  const SizedBox(height: 12),
                  ClipRRect(
                    borderRadius: BorderRadius.circular(2),
                    child: LinearProgressIndicator(
                      value: progress,
                      minHeight: 4,
                      backgroundColor: Colors.white24,
                      color: MirrorTheme.accent,
                    ),
                  ),
                  const SizedBox(height: 8),
                  Row(
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    children: [
                      Text(
                        _formatDuration(playback.position),
                        style: Theme.of(context).textTheme.bodySmall?.copyWith(
                              fontFamily: MirrorTheme.fontMono,
                            ),
                      ),
                      Text(
                        _formatDuration(playback.duration),
                        style: Theme.of(context).textTheme.bodySmall?.copyWith(
                              fontFamily: MirrorTheme.fontMono,
                            ),
                      ),
                    ],
                  ),
                ],
              ),
            ),
          ),
        ],
      ),
    );
  }

  Widget _albumArtPlaceholder() {
    return Container(
      width: 400,
      height: 400,
      decoration: BoxDecoration(
        color: MirrorTheme.surface,
        borderRadius: BorderRadius.circular(24),
      ),
      child: Icon(
        Icons.music_note,
        size: 120,
        color: MirrorTheme.textMuted,
      ),
    );
  }

  IconData _sourceIcon(MediaSource source) => switch (source) {
        MediaSource.youtube => Icons.smart_display,
        MediaSource.plex => Icons.movie,
        MediaSource.local => Icons.folder,
        _ => Icons.music_note,
      };

  String _formatDuration(Duration d) {
    final minutes = d.inMinutes;
    final seconds = (d.inSeconds % 60).toString().padLeft(2, '0');
    return '$minutes:$seconds';
  }
}