import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:get/get.dart';
import 'package:get/get_rx/src/rx_typedefs/rx_typedefs.dart';
import 'package:loopin/IM/im_service.dart';
import 'package:loopin/components/custom_sticky_header.dart';
import 'package:loopin/components/network_or_asset_image.dart';
import 'package:loopin/components/only_down_scroll_physics.dart';
import 'package:loopin/styles/index.dart';
import 'package:nested_scroll_view_plus/nested_scroll_view_plus.dart';
import 'package:shirne_dialog/shirne_dialog.dart';
import 'package:tencent_cloud_chat_sdk/models/v2_tim_conversation.dart';
import 'package:tencent_cloud_chat_sdk/models/v2_tim_follow_info.dart';
import 'package:tencent_cloud_chat_sdk/models/v2_tim_user_full_info.dart';

class PageParams {
  int page;
  int pageSize;
  bool isLoading;
  bool hasMore;

  PageParams({
    this.page = 1,
    this.pageSize = 10,
    this.isLoading = false,
    this.hasMore = true,
  });
}

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

  @override
  State<Vloger> createState() => MyPageState();
}

class MyPageState extends State<Vloger> with SingleTickerProviderStateMixin {
  late dynamic args;
  late RxInt currentTabIndex = 0.obs;
  late RxList items = [].obs;
  late RxList favoriteItems = [].obs;
  late final Rx<V2TimUserFullInfo> userInfo = Rx(V2TimUserFullInfo(
    userID: '',
    nickName: '',
    faceUrl: '',
    selfSignature: '',
    gender: 0,
    customInfo: {
      'coverBg': '',
    },
    role: 0,
  ));

  late RxInt followed = 0.obs; // 是否关注
  // followersCount粉丝，多少人关注了我,mutualFollowersCount互关,followingCount我关注了多少人
  late final Rx<V2TimFollowInfo> followInfo = Rx(V2TimFollowInfo(
    followersCount: 0,
    followingCount: 0,
  ));

  RxBool get shouldFixHeader => (currentTabIndex.value == 0 && items.isEmpty) || (currentTabIndex.value == 1 && favoriteItems.isEmpty) ? true.obs : false.obs;

  List tabList = [
    {'name': "作品"},
  ];

  late PageParams itemsParams;
  late PageParams favoriteParams;

  late TabController tabController;
  late ScrollController scrollController;

  late Callback tabListener;
  late Callback scrollListener;

  @override
  void initState() {
    super.initState();
    args = Get.arguments ?? {};
    itemsParams = PageParams();
    favoriteParams = PageParams();
    selfInfo();
    flowInfo();
    checkFollowType();
    initControllers();

    scrollListener = () {
      final pos = scrollController.position;
      final isNearBottom = pos.pixels >= pos.maxScrollExtent - 100;

      if (!isNearBottom) return;

      if (currentTabIndex.value == 0 && !itemsParams.isLoading && itemsParams.hasMore) {
        loadData(0);
      } else if (currentTabIndex.value == 1 && !favoriteParams.isLoading && favoriteParams.hasMore) {
        loadData(1);
      }
    };
    scrollController.addListener(scrollListener);

    tabListener = () {
      currentTabIndex.value = tabController.index;
      scrollController.animateTo(0, duration: const Duration(milliseconds: 300), curve: Curves.easeIn);
      loadData(0);
    };
    tabController.addListener(tabListener);

    loadData(0);
  }

  @override
  void dispose() {
    tabController.removeListener(tabListener);
    scrollController.removeListener(scrollListener);

    tabController.dispose();
    scrollController.dispose();
    super.dispose();
  }

  void loadData([int? tabIndex]) async {
    final index = tabIndex ?? currentTabIndex.value;
    if (index == 0) {
      if (itemsParams.isLoading || !itemsParams.hasMore) return;

      itemsParams.isLoading = true;

      await Future.delayed(const Duration(seconds: 1));

      // 模拟生成新数据
      List<String> newItems = List.generate(
        itemsParams.pageSize,
        (i) => '作品 ${(itemsParams.page - 1) * itemsParams.pageSize + i + 1}',
      );

      // 模拟判断是否还有更多数据
      if (itemsParams.page >= 2) {
        itemsParams.hasMore = false;
      }

      // 添加新数据，触发响应式更新
      items.addAll(newItems);

      // 页码加一
      itemsParams.page++;

      itemsParams.isLoading = false;
    }
  }

  void initControllers() {
    tabController = TabController(initialIndex: 0, length: tabList.length, vsync: this);
    scrollController = ScrollController();
  }

  // 获取当前博主基本信息
  void selfInfo() async {
    final resIm = await ImService.instance.otherInfo(args['memberId']);
    if (resIm.success && resIm.data != null) {
      userInfo.value = resIm.data!;
      logger.i(userInfo.value.toLogString());
    } else {
      logger.e(resIm.desc);
    }
  }

  // 博主的关注与粉丝
  void flowInfo() async {
    logger.w(args.toString());
    final res = await ImService.instance.getUserFollowInfo(userIDList: [args['memberId']]);
    if (res.success && res.data?.first != null) {
      //这里少个点赞，从服务端获取
      // followersCount粉丝，多少人关注了我,mutualFollowersCount互关,followingCount我关注了多少人
      followInfo.value = res.data!.first;
      logger.i(followInfo.value.toJson());
    } else {
      logger.e(res.desc);
    }
  }

  // 检测当前用户是否关注博主
  void checkFollowType() async {
    /// 0：不是好友也没有关注
    /// 1：你关注了对方（单向）
    /// 2：对方关注了你（单向）
    /// 3：互相关注（双向好友）
    final res = await ImService.instance.checkFollowType(userIDList: [args['memberId']]);
    if (res.success) {
      final followType = res.data?.first.followType ?? 0;
      logger.i(res.data?.first.toJson());
      followed.value = followType;
      logger.i(followed.value);
    }
  }

  @override
  Widget build(BuildContext context) {
    return PopScope(
      canPop: true,
      onPopInvokedWithResult: (bool didPop, Object? result) {
        if (didPop) {
          print('User navigated back');
        }
      },
      child:Scaffold(
      backgroundColor: const Color(0xFFFAF6F9),
      body: Obx(() {
        return NestedScrollViewPlus(
          controller: scrollController,
          physics: shouldFixHeader.value ? const OnlyDownScrollPhysics(parent: AlwaysScrollableScrollPhysics()) : const AlwaysScrollableScrollPhysics(),
          overscrollBehavior: OverscrollBehavior.outer,
          headerSliverBuilder: (context, innerBoxIsScrolled) {
            return [
              SliverAppBar(
                backgroundColor: Colors.transparent,
                surfaceTintColor: Colors.transparent,
                expandedHeight: 180.0,
                collapsedHeight: 120.0,
                pinned: true,
                stretch: true,
                  leading: IconButton(
                  icon: const Icon(Icons.arrow_back),
                  onPressed: () {
                       Get.back(result: {
                        'returnTo': '/',
                        'vlogerId': args['memberId'],
                        'followStatus': (followed.value == 1 || followed.value == 3)?true:false,
                      });
                  },
                ),
                onStretchTrigger: () async {
                  logger.i('触发 stretch 拉伸');
                  // 加载刷新逻辑
                },
                flexibleSpace: Obx(() {
                  userInfo.value;
                  return _buildFlexibleSpace();
                }),
              ),
              SliverToBoxAdapter(
                child: Padding(
                  padding: const EdgeInsets.all(10.0),
                  child: Column(
                    children: [
                      Obx(() => _buildStatsCard()),
                      const SizedBox(height: 10.0),
                      Obx(() => _buildInfoDesc(context)),
                      const SizedBox(height: 10.0),
                      Obx(() => _buildFoucsButton(context)),
                    ],
                  ),
                ),
              ),
              SliverPersistentHeader(
                pinned: true,
                delegate: CustomStickyHeader(
                  child: PreferredSize(
                    preferredSize: const Size.fromHeight(48.0),
                    child: Container(
                      color: Colors.white,
                      child: TabBar(
                        controller: tabController,
                        tabs: tabList.map((item) {
                          return Tab(
                            child: Badge.count(
                              backgroundColor: Colors.red,
                              count: item['badge'] ?? 0,
                              isLabelVisible: item['badge'] != null,
                              alignment: Alignment.topRight,
                              offset: const Offset(14, -6),
                              child: Text(item['name'], style: const TextStyle(fontWeight: FontWeight.bold)),
                            ),
                          );
                        }).toList(),
                        isScrollable: true, //禁止左右滑动
                        tabAlignment: TabAlignment.start,
                        overlayColor: WidgetStateProperty.all(Colors.transparent),
                        unselectedLabelColor: Colors.black87,
                        labelColor: Colors.black,
                        indicator: const UnderlineTabIndicator(borderSide: BorderSide(color: Colors.transparent, width: 2.0)),
                        indicatorSize: TabBarIndicatorSize.label,
                        unselectedLabelStyle: const TextStyle(fontSize: 16.0, fontFamily: 'Microsoft YaHei'),
                        labelStyle: const TextStyle(fontSize: 18.0, fontFamily: 'Microsoft YaHei', fontWeight: FontWeight.bold),
                        dividerHeight: 0,
                        padding: const EdgeInsets.symmetric(horizontal: 10.0),
                        labelPadding: const EdgeInsets.symmetric(horizontal: 15.0),
                      ),
                    ),
                  ),
                ),
              ),
            ];
          },
          body: TabBarView(
            controller: tabController,
            children: [
              // Tab 1:
              Obx(() => _buildGridTab(0)),
            ],
          ),
        );
      }),
    ),
    );
  }

  // 空状态提示
  Widget emptyTip(String text) {
    return CustomScrollView(
      physics: const OnlyDownScrollPhysics(),
      slivers: [
        SliverFillRemaining(
          hasScrollBody: false,
          child: Align(
            alignment: Alignment.topCenter,
            child: Padding(
              padding: const EdgeInsets.only(top: 50.0),
              child: Column(
                mainAxisSize: MainAxisSize.min,
                children: [
                  Image.asset('assets/images/empty.png', width: 100.0),
                  const SizedBox(height: 8.0),
                  Text(
                    text,
                    style: const TextStyle(color: Colors.grey, fontSize: 13.0),
                  ),
                ],
              ),
            ),
          ),
        ),
      ],
    );
  }

  Widget _buildGridTab(int tabIndex) {
    final listToShow = tabIndex == 0 ? items : favoriteItems;
    final params = tabIndex == 0 ? itemsParams : favoriteParams;

    if (listToShow.isEmpty) {
      return emptyTip('暂无相关数据');
    }

    return CustomScrollView(
      slivers: [
        SliverPadding(
          padding: const EdgeInsets.all(10.0),
          sliver: SliverGrid(
            delegate: SliverChildBuilderDelegate(
              (context, index) {
                return Container(
                  decoration: BoxDecoration(
                    color: Colors.blue[100 * ((index % 8) + 1)],
                    borderRadius: BorderRadius.circular(10.0),
                  ),
                  alignment: Alignment.center,
                  child: Text(listToShow[index], style: const TextStyle(fontWeight: FontWeight.bold)),
                );
              },
              childCount: listToShow.length,
            ),
            gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
              crossAxisCount: 3,
              crossAxisSpacing: 10.0,
              mainAxisSpacing: 10.0,
              childAspectRatio: 1.0,
            ),
          ),
        ),
        SliverToBoxAdapter(
          child: Padding(
            padding: const EdgeInsets.symmetric(vertical: 20.0),
            child: Center(
              child: params.hasMore ? const CircularProgressIndicator() : const Text('没有更多数据了'),
            ),
          ),
        ),
      ],
    );
  }

  Widget _buildFlexibleSpace() {
    return LayoutBuilder(
      builder: (BuildContext context, BoxConstraints constraints) {
        final double maxHeight = 180.0;
        final double minHeight = 100.0;
        final double currentHeight = constraints.maxHeight;
        double ratio = (currentHeight - minHeight) / (maxHeight - minHeight);
        ratio = ratio.clamp(0.0, 1.0);
        String coverBg = userInfo.value.customInfo?['coverBg'] ?? '';
        return Stack(
          fit: StackFit.expand,
          children: [
            Positioned.fill(
              child: Opacity(
                opacity: 1.0,
                child: NetworkOrAssetImage(
                  imageUrl: coverBg,
                  width: double.infinity,
                ),
              ),
            ),
            Positioned(
              left: 15.0,
              bottom: 0,
              right: 15.0,
              child: Container(
                padding: const EdgeInsets.symmetric(vertical: 10.0),
                child: Row(
                  crossAxisAlignment: CrossAxisAlignment.end,
                  children: <Widget>[
                    ClipOval(
                      child: NetworkOrAssetImage(imageUrl: userInfo.value.faceUrl),
                    ),
                    const SizedBox(width: 15.0),
                    Expanded(
                      child: Column(
                        crossAxisAlignment: CrossAxisAlignment.start,
                        children: [
                          Row(
                            children: [
                              Container(
                                padding: const EdgeInsets.symmetric(horizontal: 10.0, vertical: 5.0),
                                decoration: BoxDecoration(color: Colors.black.withAlpha((0.3 * 255).round()), borderRadius: BorderRadius.circular(20.0)),
                                child: Text(
                                  userInfo.value.nickName ?? '未知',
                                  overflow: TextOverflow.ellipsis,
                                  style: TextStyle(
                                    fontSize: 20.0,
                                    fontWeight: FontWeight.bold,
                                    fontFamily: 'Arial',
                                    color: Colors.white,
                                  ),
                                ),
                              ),
                            ],
                          ),
                          const SizedBox(height: 8.0),
                          Container(
                            padding: const EdgeInsets.symmetric(horizontal: 10.0, vertical: 5.0),
                            decoration: BoxDecoration(color: Colors.black.withAlpha((0.3 * 255).round()), borderRadius: BorderRadius.circular(20.0)),
                            child: InkWell(
                              onTap: () {
                                logger.i('点击个ID');
                                Clipboard.setData(ClipboardData(text: '${userInfo.value.userID}'));
                                MyDialog.toast('ID已复制', icon: const Icon(Icons.check_circle), style: ToastStyle(backgroundColor: Colors.green.withAlpha(200)));
                              },
                              child: Text('ID:${userInfo.value.userID}', style: TextStyle(fontSize: 12.0, color: Colors.white)),
                            ),
                          ),
                        ],
                      ),
                    ),
                  ],
                ),
              ),
            ),
          ],
        );
      },
    );
  }

  Widget _buildStatsCard() {
    return Container(
      decoration: BoxDecoration(
        color: Colors.white,
        borderRadius: BorderRadius.circular(15.0),
        boxShadow: [BoxShadow(color: Colors.black.withAlpha(10), offset: const Offset(0.0, 1.0), blurRadius: 2.0, spreadRadius: 0.0)],
      ),
      clipBehavior: Clip.antiAlias,
      child: Padding(
        padding: const EdgeInsets.all(10.0),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.spaceAround,
          children: [
            Column(children: [Text('9999', style: TextStyle(fontSize: 16.0, fontWeight: FontWeight.bold)), SizedBox(height: 3.0), Text('获赞')]),
            Column(children: [
              Text('${followInfo.value.followingCount}', style: TextStyle(fontSize: 16.0, fontWeight: FontWeight.bold)),
              SizedBox(height: 3.0),
              Text('关注')
            ]),
            Column(children: [
              Text('${followInfo.value.followersCount}', style: TextStyle(fontSize: 16.0, fontWeight: FontWeight.bold)),
              SizedBox(height: 3.0),
              Text('粉丝')
            ]),
          ],
        ),
      ),
    );
  }

  Widget _buildInfoDesc(BuildContext context) {
    final tx = userInfo.value.selfSignature;
    if (tx == null || tx.isEmpty) {
      return const SizedBox.shrink();
    }
    return Container(
        decoration: BoxDecoration(
          color: Colors.white,
          borderRadius: BorderRadius.circular(15.0),
          boxShadow: [BoxShadow(color: Colors.black.withAlpha(10), offset: const Offset(0.0, 1.0), blurRadius: 2.0, spreadRadius: 0.0)],
        ),
        clipBehavior: Clip.antiAlias,
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Container(
              padding: const EdgeInsets.all(12),
              width: double.infinity,
              decoration: BoxDecoration(
                color: Colors.white,
                borderRadius: BorderRadius.circular(8),
              ),
              child: Text(
                '${userInfo.value.selfSignature}',
                style: const TextStyle(fontSize: 16),
              ),
            ),
          ],
        ));
  }

  /// 关注按钮
  Widget _buildFoucsButton(BuildContext context) {
    // final vlogerId = '1943510443312078850'; // 18832510385,后面改回博主的id
    final vlogerId = args['memberId'];

    return AnimatedSwitcher(
      duration: const Duration(milliseconds: 300),
      transitionBuilder: (child, animation) {
        final offsetAnimation = Tween<Offset>(
          begin: Offset((followed.value == 0) ? -1 : 1, 0),
          end: Offset.zero,
        ).animate(animation);

        return SlideTransition(
          position: offsetAnimation,
          child: child,
        );
      },
      child: [1, 3].contains(followed.value)
          ? Row(
              key: const ValueKey('followed'),
              children: [
                Expanded(
                  child: ElevatedButton(
                    onPressed: () async {
                      print('点击已关注');
                      final res = await ImService.instance.unfollowUser(userIDList: [vlogerId]);
                      if (res.success) {
                        // 如果为1那么状态置为0，为3则置为2
                        followed.value = followed.value == 1 ? 0 : 2;
                        // 取关后不需重置陌生人消息group
                      }
                    },
                    style: ElevatedButton.styleFrom(
                      backgroundColor: Colors.grey[300],
                      foregroundColor: Colors.black87,
                      padding: const EdgeInsets.symmetric(vertical: 16),
                      shape: RoundedRectangleBorder(
                        borderRadius: BorderRadius.circular(12),
                      ),
                    ),
                    child: Text(followed.value == 1
                        ? '已关注'
                        : followed.value == 3
                            ? '互关'
                            : '未知状态'),
                  ),
                ),
                const SizedBox(width: 12),
                Expanded(
                  child: ElevatedButton(
                    onPressed: () async {
                      print('私信');
                      // 获取指定会话
                      final res = await ImService.instance.getConversation(conversationID: 'c2c_$vlogerId');
                      V2TimConversation conversation = res.data;
                      logger.i(conversation.toLogString());
                      if (res.success) {
                        // final isFriend = await ImService.instance.isMyFriend(vlogerId, FriendTypeEnum.V2TIM_FRIEND_TYPE_BOTH);
                        // 这里需要注意处理取关后重新关注逻辑
                        // 是否互相关注
                        if (followed.value == 3) {
                          Get.toNamed('/chat', arguments: conversation);
                        } else {
                          logger.i('对方没关注我');
                          logger.i(conversation.toLogString());
                          conversation.showName = conversation.showName ?? userInfo.value.nickName;
                          Get.toNamed('/chatNoFriend', arguments: conversation);
                        }
                      } else {
                        MyDialog.toast(res.desc, icon: const Icon(Icons.warning), style: ToastStyle(backgroundColor: Colors.red.withAlpha(200)));
                      }
                    },
                    style: ElevatedButton.styleFrom(
                      backgroundColor: Colors.grey[300],
                      foregroundColor: Colors.black87,
                      padding: const EdgeInsets.symmetric(vertical: 16),
                      shape: RoundedRectangleBorder(
                        borderRadius: BorderRadius.circular(12),
                      ),
                    ),
                    child: const Text('私信'),
                  ),
                ),
              ],
            )
          : SizedBox(
              key: const ValueKey('not_followed'),
              width: double.infinity,
              child: ElevatedButton.icon(
                onPressed: () async {
                  // 0没关系，2对方关注了我
                  print('点击关注');
                  final res = await ImService.instance.followUser(userIDList: [vlogerId]);
                  if (res.success) {
                    followed.value = followed.value == 0 ? 1 : 3;
                    if (followed.value == 3) {
                      // 修改后若为3，我将此会话移除noFriend会话组
                      final res = await ImService.instance.getConversation(conversationID: 'c2c_$vlogerId');
                      if (res.success) {
                        V2TimConversation conversation = res.data;
                        if (conversation.conversationGroupList?.isNotEmpty == true) {
                          //移除陌生人会话
                          await ImService.instance.deleteConversationsFromGroup(
                            groupName: conversation.conversationGroupList!.first!,
                            conversationIDList: [conversation.conversationID],
                          );
                          //重新构建会话
                        }
                      }
                    }
                  }
                },
                icon: const Icon(Icons.add),
                label: const Text('关注'),
                style: ElevatedButton.styleFrom(
                  backgroundColor: FStyle.primaryColor,
                  foregroundColor: Colors.white,
                  padding: const EdgeInsets.symmetric(vertical: 16),
                  shape: RoundedRectangleBorder(
                    borderRadius: BorderRadius.circular(12),
                  ),
                ),
              ),
            ),
    );
  }
}