// lib/pages/playlist_page.dart
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import '../services/audio_service.dart';

class PlaylistPage extends StatelessWidget {
  const PlaylistPage({super.key});

  @override
  Widget build(BuildContext context) {
    final service = context.watch<AudioService>();
    final queue = service.queue;
    final currentIndex = service.currentIndex;

    return Scaffold(
      backgroundColor: const Color(0xFF0E1211),
      appBar: AppBar(
        title: const Text(
          '播放列表',
          style: TextStyle(
            color: Colors.white,
            fontSize: 18,
            fontWeight: FontWeight.w500,
          ),
        ),
        backgroundColor: Colors.transparent,
        elevation: 0,
        foregroundColor: Colors.white,
        leading: IconButton(
          icon: const Icon(Icons.arrow_back_ios_new),
          onPressed: () => Navigator.pop(context),
        ),
        actions: [
          IconButton(
            icon: const Icon(Icons.clear_all, color: Colors.white54),
            onPressed: () {
              showDialog(
                context: context,
                builder: (context) => AlertDialog(
                  backgroundColor: const Color(0xFF1A1F1E),
                  title: const Text(
                    '清空播放列表',
                    style: TextStyle(color: Colors.white),
                  ),
                  content: const Text(
                    '确定要清空当前播放列表吗？',
                    style: TextStyle(color: Colors.grey),
                  ),
                  actions: [
                    TextButton(
                      onPressed: () => Navigator.pop(context),
                      child: const Text('取消'),
                    ),
                    TextButton(
                      onPressed: () {
                        service.clearQueue();
                        Navigator.pop(context);
                        Navigator.pop(context);
                      },
                      child: const Text(
                        '清空',
                        style: TextStyle(color: Colors.red),
                      ),
                    ),
                  ],
                ),
              );
            },
          ),
        ],
      ),
      body: queue.isEmpty
          ? const Center(
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  Icon(Icons.playlist_play, size: 48, color: Colors.grey),
                  SizedBox(height: 16),
                  Text(
                    '播放列表为空',
                    style: TextStyle(color: Colors.grey),
                  ),
                ],
              ),
            )
          : ListView.builder(
              padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
              itemCount: queue.length,
              itemBuilder: (context, index) {
                final song = queue[index];
                final isCurrent = index == currentIndex;

                return ListTile(
                  contentPadding: const EdgeInsets.symmetric(
                    horizontal: 8,
                    vertical: 4,
                  ),
                  leading: Icon(
                    isCurrent ? Icons.play_arrow : Icons.music_note,
                    color:
                        isCurrent ? const Color(0xFFB8D4D0) : Colors.grey[600],
                    size: 24,
                  ),
                  title: Text(
                    song.title,
                    style: TextStyle(
                      fontSize: 16,
                      fontWeight: isCurrent ? FontWeight.w600 : FontWeight.w400,
                      color: isCurrent ? Colors.white : Colors.grey[300],
                    ),
                    maxLines: 1,
                    overflow: TextOverflow.ellipsis,
                  ),
                  subtitle: Text(
                    song.artist,
                    style: TextStyle(
                      fontSize: 13,
                      color: isCurrent ? Colors.grey[400] : Colors.grey[600],
                    ),
                    maxLines: 1,
                    overflow: TextOverflow.ellipsis,
                  ),
                  trailing: isCurrent
                      ? Container(
                          padding: const EdgeInsets.symmetric(
                            horizontal: 8,
                            vertical: 2,
                          ),
                          decoration: BoxDecoration(
                            color: const Color(0xFFB8D4D0).withOpacity(0.2),
                            borderRadius: BorderRadius.circular(4),
                          ),
                          child: const Text(
                            '正在播放',
                            style: TextStyle(
                              fontSize: 10,
                              color: Color(0xFFB8D4D0),
                            ),
                          ),
                        )
                      : null,
                  onTap: () {
                    service.setQueue(queue, startIndex: index);
                    Navigator.pop(context);
                  },
                );
              },
            ),
    );
  }
}