MTMusic/lib/view/user/my_download_view.dart

import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:music_player_miao/common_widget/Song_widegt.dart';
import '../../common/download_manager.dart';
import '../../view_model/home_view_model.dart';
import '../music_view.dart';

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

  @override
  State<MyDownloadView> createState() => _MyDownloadViewState();
}

class _MyDownloadViewState extends State<MyDownloadView> {
  final listVM = Get.put(HomeViewModel());
  bool _isSelectMode = false;
  final List<bool> _mySongListSelections = List.generate(2, (index) => false);
  List<bool> _selectedItems = [];
  List<Song> _songs = [];
  final downloadManager = Get.put(DownloadManager());

  @override
  void initState() {
    super.initState();
    _getSongs();
  }

  void _toggleSelectMode() {
    setState(() {
      _isSelectMode = !_isSelectMode;
      if (!_isSelectMode) {
        _selectedItems = List.generate(_songs.length, (index) => false);
      }
    });
  }

  void _getSongs() async {
    setState(() {
      _songs = downloadManager.getLocalSongs();
      _selectedItems = List.generate(_songs.length, (index) => false);
    });
  }

  void _selectAll() {
    setState(() {
      _selectedItems = List.generate(_songs.length, (index) => true);
    });
  }

  void _deleteSongs(List<bool> selectedItems) {
    // List<Song> songsToDelete = [];
    for (int i = 0; i < selectedItems.length; i++) {
      if (selectedItems[i]) {
        // songsToDelete.add(_songs[i]);
        downloadManager.removeSong(_songs[i].id);
      }
    }

    // 重新加载歌曲列表
    _getSongs();
  }

  void _deleteSong(int index) {
    downloadManager.removeSong(_songs[index].id);
    _getSongs();
  }

  void _showSelectionDialog() {
    showDialog(
      context: context,
      builder: (BuildContext context) {
        return AlertDialog(
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(10),
          ),
          title: Row(
            children: [
              const Text(
                "添加到",
              ),
              Text(
                '(${_selectedItems.where((item) => item).length} 首)',
                style: const TextStyle(color: Color(0xff429482), fontSize: 16),
              )
            ],
          ),
          content: SingleChildScrollView(
            physics: const BouncingScrollPhysics(),
            child: Column(
              children: [
                for (int i = 0; i < _mySongListSelections.length; i++)
                  _buildSongListTile(i),
              ],
            ),
          ),
          actions: [
            TextButton(
              onPressed: () {
                Navigator.of(context).pop();
              },
              style: TextButton.styleFrom(
                backgroundColor: const Color(0xff429482),
                minimumSize: const Size(130, 50),
                shape: RoundedRectangleBorder(
                  borderRadius: BorderRadius.circular(5.0),
                ),
              ),
              child: const Text(
                "取消",
                style: TextStyle(color: Colors.white),
              ),
            ),
            TextButton(
              onPressed: () {},
              style: TextButton.styleFrom(
                backgroundColor: const Color(0xff429482),
                minimumSize: const Size(130, 50),
                shape: RoundedRectangleBorder(
                  borderRadius: BorderRadius.circular(5.0),
                ),
              ),
              child: const Text(
                "保存",
                style: TextStyle(color: Colors.white),
              ),
            ),
          ],
        );
      },
    );
  }

  Widget _buildSongListTile(int index) {
    return ListTile(
      title: Text("我的歌单 $index"),
      trailing: Checkbox(
        value: _mySongListSelections[index],
        onChanged: (value) {
          setState(() {
            _mySongListSelections[index] = value ?? false;
          });
        },
        shape: const CircleBorder(),
        activeColor: const Color(0xff429482),
      ),
      onTap: () {
        setState(() {
          _mySongListSelections[index] = !_mySongListSelections[index];
        });
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      decoration: const BoxDecoration(
        image: DecorationImage(
          image: AssetImage("assets/img/app_bg.png"),
          fit: BoxFit.cover,
        ),
      ),
      child: Scaffold(
        backgroundColor: Colors.transparent,
        appBar: AppBar(
          backgroundColor: Colors.transparent,
          centerTitle: true,
          elevation: 0,
          leading: !_isSelectMode
              ? IconButton(
                  onPressed: () {
                    Get.back(result: true);
                  },
                  icon: Image.asset(
                    "assets/img/back.png",
                    width: 25,
                    height: 25,
                    fit: BoxFit.contain,
                  ),
                )
              : TextButton(
                  onPressed: _selectAll,
                  style: TextButton.styleFrom(
                    foregroundColor: Colors.black,
                    minimumSize: const Size(50, 40), // 设置最小宽度，确保文字有足够空间
                    padding:
                        const EdgeInsets.symmetric(horizontal: 8), // 添加水平内边距
                  ),
                  child: const Text(
                    '全选',
                    style: TextStyle(fontSize: 18),
                  ),
                ),
          title: _isSelectMode
              ? Text(
                  '已选中 ${_selectedItems.where((item) => item).length} 首歌曲',
                  style: const TextStyle(
                    color: Colors.black,
                  ),
                )
              : const Text(
                  '本地下载',
                  style: TextStyle(color: Colors.black),
                ),
          actions: [
            if (_isSelectMode)
              TextButton(
                  onPressed: () {
                    setState(() {
                      _isSelectMode = false;
                      _selectedItems = List.generate(_songs.length, (index) => false);
                    });
                  },
                  child: const Text(
                    "完成",
                    style: TextStyle(color: Colors.black, fontSize: 18),
                  ))
          ],
        ),
        body: Container(
          padding: const EdgeInsets.only(left: 10),
          decoration: const BoxDecoration(
            color: Colors.white,
            borderRadius: BorderRadius.vertical(top: Radius.circular(30)),
          ),
          child: Column(
            children: [
              Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: [
                  Row(
                    children: [
                      IconButton(
                        onPressed: _songs.isEmpty ? null : () {
                          Navigator.push(
                            context,
                            MaterialPageRoute(
                              builder: (context) => MusicView(
                                songList: _songs,
                                initialSongIndex: 0,
                                onSongStatusChanged: (index, isCollected, isLiked) {
                                  setState(() {
                                    // 更新父组件中的数据
                                    _songs[index].collection = isCollected;
                                    _songs[index].likes = isLiked;
                                    downloadManager.updateSongInfo(_songs[index].id, isCollected, isLiked);
                                  });
                                },
                              ),
                            ),
                          );
                        },
                        icon: Image.asset(
                          "assets/img/button_play.png",
                          width: 20,
                          height: 20,
                        ),
                      ),
                      const Text(
                        '播放全部',
                        style: TextStyle(fontSize: 16),
                      ),
                      const SizedBox(
                        width: 5,
                      ),
                      Text(
                        '${_songs.length}',
                        style: TextStyle(fontSize: 16),
                      ),
                    ],
                  ),
                  IconButton(
                    onPressed: _songs.isEmpty ? null : _toggleSelectMode,
                    icon: Image.asset(
                      "assets/img/list_op.png",
                      width: 20,
                      height: 20,
                    ),
                  ),
                ],
              ),
              Expanded(
                child: ListView.builder(
                  itemCount: _songs.length,
                  itemBuilder: (BuildContext context, int index) {
                    final song = _songs[index];
                    return Container(
                      padding: const EdgeInsets.symmetric(vertical: 5.0),
                      child: ListTile(
                        leading: _isSelectMode
                            ? Checkbox(
                                value: _selectedItems[index],
                                onChanged: (value) {
                                  setState(() {
                                    _selectedItems[index] = value!;
                                  });
                                },
                                shape: const CircleBorder(),
                                activeColor: const Color(0xff429482),
                              )
                            : null,
                        title: Text('${song.title} - ${song.artist}'),
                        trailing: _isSelectMode
                            ? null
                            : IconButton(
                                icon: const Icon(Icons.more_vert),
                                onPressed: () {
                                  _bottomSheet(context, index);
                                },
                              ),
                        // 添加点击事件
                        onTap: _isSelectMode
                            ? () {
                                // 在选择模式下点击整行触发复选框
                                setState(() {
                                  _selectedItems[index] =
                                      !_selectedItems[index];
                                });
                              }
                            : () {
                                // 非选择模式下跳转到播放页面
                          Navigator.push(
                            context,
                            MaterialPageRoute(
                              builder: (context) => MusicView(
                                songList: _songs,
                                initialSongIndex: index,
                                onSongStatusChanged: (index, isCollected, isLiked) {
                                  setState(() {
                                    // 更新父组件中的数据
                                    _songs[index].collection = isCollected;
                                    _songs[index].likes = isLiked;
                                  });
                                },
                              ),
                                  ),
                                );
                              },
                      ),
                    );
                  },
                ),
              ),
            ],
          ),
        ),
        bottomNavigationBar: _isSelectMode
            ? BottomAppBar(
                height: 140, // 增加 BottomAppBar 的高度
                child: SingleChildScrollView(
                  // 使用 SingleChildScrollView 包装内容
                  child: Column(
                    mainAxisSize: MainAxisSize.min,
                    crossAxisAlignment: CrossAxisAlignment.stretch,
                    children: [
                      Padding(
                        padding: const EdgeInsets.symmetric(vertical: 8),
                        child: Row(
                          mainAxisAlignment: MainAxisAlignment.spaceAround,
                          children: [
                            // 左半边 "添加到" 按钮
                            Expanded(
                              child: InkWell(
                                onTap: () {
                                  _showSelectionDialog();
                                },
                                child: Row(
                                  mainAxisAlignment: MainAxisAlignment.center,
                                  children: [
                                    SizedBox(
                                      width: 25,
                                      height: 25,
                                      child: Image.asset("assets/img/add.png"),
                                    ),
                                    const SizedBox(width: 4),
                                    const Text("添加到"),
                                  ],
                                ),
                              ),
                            ),
                            // 中间分隔线
                            Container(
                              height: 50,
                              width: 2,
                              color: const Color(0xff429482),
                            ),
                            // 右半边 "删除" 按钮
                            Expanded(
                              child: InkWell(
                                onTap: () {
                                  _deleteSongs(_selectedItems);
                                },
                                child: Row(
                                  mainAxisAlignment: MainAxisAlignment.center,
                                  children: [
                                    SizedBox(
                                      width: 22,
                                      height: 22,
                                      child:
                                          Image.asset("assets/img/delete.png"),
                                    ),
                                    const SizedBox(width: 4),
                                    const Text("删除"),
                                  ],
                                ),
                              ),
                            ),
                          ],
                        ),
                      ),
                      ElevatedButton(
                        onPressed: () {
                          setState(() {
                            _isSelectMode = false;
                            _selectedItems =
                                List.generate(_songs.length, (index) => false);
                          });
                        },
                        style: ElevatedButton.styleFrom(
                          backgroundColor: const Color(0xff429482),
                          padding: const EdgeInsets.symmetric(vertical: 14),
                          tapTargetSize: MaterialTapTargetSize.shrinkWrap,
                          shape: const RoundedRectangleBorder(
                            borderRadius: BorderRadius.zero,
                          ),
                        ),
                        child: const Text(
                          '取消',
                          style: TextStyle(color: Colors.black, fontSize: 16),
                        ),
                      ),
                    ],
                  ),
                ),
              )
            : null,
      ),
    );
  }

  Future _bottomSheet(BuildContext context, int index) {
    return showModalBottomSheet(
        context: context,
        backgroundColor: Colors.white,
        shape: const RoundedRectangleBorder(
            borderRadius: BorderRadius.vertical(top: Radius.circular(30))),
        builder: (context) => Container(
              height: 180,
              padding: const EdgeInsets.only(top: 20),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.stretch,
                children: [
                  Row(
                    mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                    children: [
                      Column(
                        children: [
                          IconButton(
                            onPressed: () {
                              _deleteSong(index);
                              Navigator.pop(context);
                            },
                            icon: Image.asset("assets/img/list_remove.png"),
                            iconSize: 60,
                          ),
                          const Text("删除")
                        ],
                      ),
                      Column(
                        children: [
                          IconButton(
                            onPressed: () {},
                            icon: Image.asset("assets/img/list_collection.png"),
                            iconSize: 60,
                          ),
                          const Text("收藏")
                        ],
                      ),
                      Column(
                        children: [
                          IconButton(
                            onPressed: () {},
                            icon: Image.asset("assets/img/list_good.png"),
                            iconSize: 60,
                          ),
                          const Text("点赞")
                        ],
                      ),
                      Column(
                        children: [
                          IconButton(
                            onPressed: () {},
                            icon: Image.asset("assets/img/list_comment.png"),
                            iconSize: 60,
                          ),
                          const Text("评论")
                        ],
                      ),
                    ],
                  ),
                  const SizedBox(
                    height: 22,
                  ),
                  ElevatedButton(
                    onPressed: () => Navigator.pop(context),
                    style: ElevatedButton.styleFrom(
                      backgroundColor: const Color(0xff429482),
                      padding: const EdgeInsets.symmetric(vertical: 8),
                      tapTargetSize: MaterialTapTargetSize.shrinkWrap,
                      shape: const RoundedRectangleBorder(
                        borderRadius: BorderRadius.zero,
                      ),
                    ),
                    child: const Text(
                      "取消",
                      style: TextStyle(color: Colors.black, fontSize: 18),
                    ),
                  ),
                ],
              ),
            ));
  }
}