import 'dart:async';

import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:pilipala/common/skeleton/video_reply.dart';
import 'package:pilipala/common/widgets/http_error.dart';
import 'package:pilipala/models/common/reply_type.dart';
import 'package:pilipala/pages/dynamics/deatil/index.dart';
import 'package:pilipala/pages/dynamics/widgets/author_panel.dart';
import 'package:pilipala/pages/video/detail/reply/widgets/reply_item.dart';
import 'package:pilipala/pages/video/detail/replyReply/index.dart';

import '../widgets/dynamic_panel.dart';

class DynamicDetailPage extends StatefulWidget {
  // const DynamicDetailPage({super.key});
  const DynamicDetailPage({Key? key}) : super(key: key);

  @override
  State<DynamicDetailPage> createState() => _DynamicDetailPageState();
}

class _DynamicDetailPageState extends State<DynamicDetailPage> {
  late DynamicDetailController? _dynamicDetailController;
  Future? _futureBuilderFuture;
  late StreamController<bool> titleStreamC; // appBar title
  final ScrollController scrollController = ScrollController();
  bool _visibleTitle = false;
  String? action;
  // 回复类型
  late int type;

  @override
  void initState() {
    super.initState();
    int oid = 0;
    // floor 1原创 2转发
    if (Get.arguments['floor'] == 1) {
      oid = int.parse(Get.arguments['item'].basic!['comment_id_str']);
    } else {
      oid = Get.arguments['item'].modules.moduleDynamic.major.draw.id;
    }
    type = Get.arguments['item'].basic!['comment_type'];
    action =
        Get.arguments.containsKey('action') ? Get.arguments['action'] : null;
    _dynamicDetailController = Get.put(DynamicDetailController(oid, type));
    _futureBuilderFuture = _dynamicDetailController!.queryReplyList();
    titleStreamC = StreamController<bool>();
    scrollController.addListener(_listen);
    if (action == 'comment') {
      _visibleTitle = true;
      titleStreamC.add(true);
    }
  }

  void _listen() async {
    if (scrollController.position.pixels >=
        scrollController.position.maxScrollExtent - 300) {
      if (!_dynamicDetailController!.isLoadingMore) {
        _dynamicDetailController!.isLoadingMore = true;
        await _dynamicDetailController!.queryReplyList(reqType: 'onLoad');
      }
    }

    if (scrollController.offset > 55 && !_visibleTitle) {
      _visibleTitle = true;
      titleStreamC.add(true);
    } else if (scrollController.offset <= 55 && _visibleTitle) {
      _visibleTitle = false;
      titleStreamC.add(false);
    }
  }

  void replyReply(replyItem) {
    int oid = replyItem.oid;
    int rpid = replyItem.rpid!;
    Get.to(
      () => Scaffold(
        appBar: AppBar(
          titleSpacing: 0,
          centerTitle: false,
          title: Text(
            '评论详情',
            style: Theme.of(context).textTheme.titleMedium,
          ),
        ),
        body: VideoReplyReplyPanel(
          oid: oid,
          rpid: rpid,
          source: 'dynamic',
          replyType: ReplyType.values[type],
          firstFloor: replyItem,
        ),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        elevation: 0,
        scrolledUnderElevation: 1,
        centerTitle: false,
        titleSpacing: 0,
        title: StreamBuilder(
          stream: titleStreamC.stream,
          initialData: false,
          builder: (context, AsyncSnapshot snapshot) {
            return AnimatedOpacity(
              opacity: snapshot.data ? 1 : 0,
              duration: const Duration(milliseconds: 300),
              child: author(_dynamicDetailController!.item, context),
            );
          },
        ),
        // actions: _detailModel != null ? appBarAction() : [],
      ),
      body: RefreshIndicator(
        onRefresh: () async {
          await _dynamicDetailController!.queryReplyList();
        },
        child: CustomScrollView(
          controller: scrollController,
          slivers: [
            if (action != 'comment')
              SliverToBoxAdapter(
                child: DynamicPanel(
                  item: _dynamicDetailController!.item,
                  source: 'detail',
                ),
              ),
            SliverPersistentHeader(
              delegate: _MySliverPersistentHeaderDelegate(
                child: Container(
                  decoration: BoxDecoration(
                    color: Theme.of(context).colorScheme.surface,
                    border: Border(
                      top: BorderSide(
                        width: 0.6,
                        color: Theme.of(context).dividerColor.withOpacity(0.05),
                      ),
                    ),
                  ),
                  height: 45,
                  padding: const EdgeInsets.only(left: 12, right: 6),
                  child: Row(
                    children: [
                      Obx(
                        () => AnimatedSwitcher(
                          duration: const Duration(milliseconds: 400),
                          transitionBuilder:
                              (Widget child, Animation<double> animation) {
                            return ScaleTransition(
                                scale: animation, child: child);
                          },
                          child: Text(
                            '${_dynamicDetailController!.acount.value}',
                            key: ValueKey<int>(
                                _dynamicDetailController!.acount.value),
                          ),
                        ),
                      ),
                      const Text('条回复'),
                      const Spacer(),
                      SizedBox(
                        height: 35,
                        child: TextButton.icon(
                          onPressed: () =>
                              _dynamicDetailController!.queryBySort(),
                          icon: const Icon(Icons.sort, size: 16),
                          label: Obx(() => Text(
                                _dynamicDetailController!.sortTypeLabel.value,
                                style: const TextStyle(fontSize: 13),
                              )),
                        ),
                      )
                    ],
                  ),
                ),
              ),
              pinned: true,
            ),
            FutureBuilder(
              future: _futureBuilderFuture,
              builder: (context, snapshot) {
                if (snapshot.connectionState == ConnectionState.done) {
                  Map data = snapshot.data as Map;
                  if (snapshot.data['status']) {
                    // 请求成功
                    return Obx(
                      () => _dynamicDetailController!.replyList.isEmpty &&
                              _dynamicDetailController!.isLoadingMore
                          ? SliverList(
                              delegate:
                                  SliverChildBuilderDelegate((context, index) {
                                return const VideoReplySkeleton();
                              }, childCount: 8),
                            )
                          : SliverList(
                              delegate: SliverChildBuilderDelegate(
                                (context, index) {
                                  if (index ==
                                      _dynamicDetailController!
                                          .replyList.length) {
                                    return Container(
                                      padding: EdgeInsets.only(
                                          bottom: MediaQuery.of(context)
                                              .padding
                                              .bottom),
                                      height: MediaQuery.of(context)
                                              .padding
                                              .bottom +
                                          100,
                                      child: Center(
                                        child: Obx(
                                          () => Text(
                                            _dynamicDetailController!
                                                .noMore.value,
                                            style: TextStyle(
                                              fontSize: 12,
                                              color: Theme.of(context)
                                                  .colorScheme
                                                  .outline,
                                            ),
                                          ),
                                        ),
                                      ),
                                    );
                                  } else {
                                    return ReplyItem(
                                      replyItem: _dynamicDetailController!
                                          .replyList[index],
                                      showReplyRow: true,
                                      replyLevel: '1',
                                      replyReply: (replyItem) =>
                                          replyReply(replyItem),
                                      replyType: ReplyType.values[type],
                                    );
                                  }
                                },
                                childCount:
                                    _dynamicDetailController!.replyList.length +
                                        1,
                              ),
                            ),
                    );
                  } else {
                    // 请求错误
                    return HttpError(
                      errMsg: data['msg'],
                      fn: () => setState(() {}),
                    );
                  }
                } else {
                  // 骨架屏
                  return SliverList(
                    delegate: SliverChildBuilderDelegate((context, index) {
                      return const VideoReplySkeleton();
                    }, childCount: 8),
                  );
                }
              },
            )
          ],
        ),
      ),
    );
  }
}

class _MySliverPersistentHeaderDelegate extends SliverPersistentHeaderDelegate {
  final double _minExtent = 45;
  final double _maxExtent = 45;
  final Widget child;

  _MySliverPersistentHeaderDelegate({required this.child});

  @override
  Widget build(
      BuildContext context, double shrinkOffset, bool overlapsContent) {
    //创建child子组件
    //shrinkOffset：child偏移值minExtent~maxExtent
    //overlapsContent：SliverPersistentHeader覆盖其他子组件返回true，否则返回false
    return child;
  }

  //SliverPersistentHeader最大高度
  @override
  double get maxExtent => _maxExtent;

  //SliverPersistentHeader最小高度
  @override
  double get minExtent => _minExtent;

  @override
  bool shouldRebuild(covariant _MySliverPersistentHeaderDelegate oldDelegate) {
    return true;
  }
}