// lib/pages/shell_page.dart
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import '../services/audio_service.dart';
import '../widgets/global_mini_player.dart';
import 'home_page.dart';
import 'player_page.dart';
import 'playlist_page.dart';

class ShellPage extends StatefulWidget {
  const ShellPage({super.key});

  @override
  State<ShellPage> createState() => _ShellPageState();
}

class _ShellPageState extends State<ShellPage> {
  // ✅ 从 PlayerPage 打开 PlaylistPage
  void _openPlaylistFromPlayer() {
    Navigator.pushNamed(context, '/playlist');
  }

  // ✅ 关闭 PlayerPage
  void _closePlayer() {
    Navigator.pop(context);
  }

  // ✅ 关闭 PlaylistPage
  void _closePlaylist() {
    Navigator.pop(context);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: const Color(0xFF0E1211),
      body: Stack(
        children: [
          // ---- 页面内容（Navigator） ----
          Navigator(
            initialRoute: '/',
            onGenerateRoute: (settings) {
              switch (settings.name) {
                case '/':
                  return _buildPageRoute(
                    const HomePage(),
                    settings: settings,
                  );
                case '/player':
                  return _buildPageRoute(
                    PlayerPage(
                      onClose: _closePlayer,
                      onOpenPlaylist: _openPlaylistFromPlayer,
                    ),
                    settings: settings,
                    fromBottom: true,
                  );
                case '/playlist':
                  return _buildPageRoute(
                    PlaylistPage(
                      onClose: _closePlaylist,
                    ),
                    settings: settings,
                  );
                default:
                  return null;
              }
            },
          ),

          // ---- MiniPlayer（覆盖在最上层） ----
          const Positioned(
            left: 0,
            right: 0,
            bottom: 0,
            child: GlobalMiniPlayer(),
          ),
        ],
      ),
    );
  }

  PageRouteBuilder _buildPageRoute(
    Widget page, {
    required RouteSettings settings,
    bool fromBottom = false,
  }) {
    return PageRouteBuilder(
      settings: settings,
      pageBuilder: (context, animation, secondaryAnimation) => page,
      transitionsBuilder: (context, animation, secondaryAnimation, child) {
        if (fromBottom) {
          // 播放页：从底部滑入
          final offset = Tween<Offset>(
            begin: const Offset(0, 1),
            end: Offset.zero,
          ).animate(CurvedAnimation(
            parent: animation,
            curve: Curves.easeOutCubic,
          ));
          return SlideTransition(position: offset, child: child);
        } else {
          // 其他页面：淡入
          return FadeTransition(
            opacity: animation,
            child: child,
          );
        }
      },
      transitionDuration: const Duration(milliseconds: 300),
      reverseTransitionDuration: const Duration(milliseconds: 300),
    );
  }
}