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

import '../theme/theme_extension.dart';
import 'player_provider.dart';

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

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final fs = Theme.of(context).extension<FabledSwordTheme>()!;
    final media = ref.watch(mediaItemProvider).valueOrNull;
    final playback = ref.watch(playbackStateProvider).valueOrNull;

    if (media == null) {
      return const Scaffold(body: Center(child: Text('Nothing playing.')));
    }

    final pos = playback?.updatePosition ?? Duration.zero;
    final dur = media.duration ?? Duration.zero;

    return Scaffold(
      backgroundColor: fs.obsidian,
      appBar: AppBar(
        backgroundColor: fs.obsidian,
        leading: IconButton(
          icon: Icon(Icons.expand_more, color: fs.parchment),
          onPressed: () => Navigator.of(context).pop(),
        ),
      ),
      body: SafeArea(
        child: Padding(
          padding: const EdgeInsets.all(24),
          child: Column(children: [
            const Spacer(),
            Container(
              width: 280, height: 280, color: fs.slate,
            ),
            const SizedBox(height: 24),
            Text(media.title, style: TextStyle(color: fs.parchment, fontSize: 22)),
            Text(media.artist ?? '', style: TextStyle(color: fs.ash, fontSize: 14)),
            const SizedBox(height: 16),
            Slider(
              activeColor: fs.accent,
              min: 0,
              max: dur.inMilliseconds.toDouble().clamp(1, double.infinity),
              value: pos.inMilliseconds.toDouble().clamp(0, dur.inMilliseconds.toDouble()),
              onChanged: (v) => ref.read(audioHandlerProvider).seek(Duration(milliseconds: v.toInt())),
            ),
            Row(mainAxisAlignment: MainAxisAlignment.spaceEvenly, children: [
              IconButton(
                icon: Icon(Icons.skip_previous, color: fs.parchment, size: 32),
                onPressed: () => ref.read(audioHandlerProvider).skipToPrevious(),
              ),
              IconButton(
                iconSize: 56,
                icon: Icon(playback?.playing == true ? Icons.pause_circle_filled : Icons.play_circle_filled, color: fs.accent),
                onPressed: () {
                  final h = ref.read(audioHandlerProvider);
                  if (playback?.playing == true) { h.pause(); } else { h.play(); }
                },
              ),
              IconButton(
                icon: Icon(Icons.skip_next, color: fs.parchment, size: 32),
                onPressed: () => ref.read(audioHandlerProvider).skipToNext(),
              ),
            ]),
            const Spacer(),
          ]),
        ),
      ),
    );
  }
}