import 'dart:async';

import 'package:flutter/material.dart';
import 'package:pikapika/basic/Common.dart';
import 'package:pikapika/basic/Cross.dart';
import 'package:pikapika/basic/Entities.dart';
import 'package:pikapika/basic/Method.dart';
import 'package:pikapika/basic/Navigator.dart';
import 'package:pikapika/screens/ComicsScreen.dart';
import 'package:pikapika/screens/components/CommentMainType.dart';
import 'package:pikapika/screens/components/ItemBuilder.dart';
import 'package:pikapika/screens/components/Recommendation.dart';

import 'ComicReaderScreen.dart';
import 'DownloadConfirmScreen.dart';
import 'components/ComicDescriptionCard.dart';
import 'components/ComicInfoCard.dart';
import 'components/ComicTagsCard.dart';
import 'components/CommentList.dart';
import 'components/ContentError.dart';
import 'components/ContentLoading.dart';
import 'components/ContinueReadButton.dart';
import 'components/RightClickPop.dart';

// 漫画详情
class ComicInfoScreen extends StatefulWidget {
  final String comicId;
  final bool holdPkz;

  const ComicInfoScreen({Key? key, required this.comicId, this.holdPkz = false})
      : super(key: key);

  @override
  State<StatefulWidget> createState() => _ComicInfoScreenState();
}

class _ComicInfoScreenState extends State<ComicInfoScreen> with RouteAware {
  late var _tabIndex = 0;
  late Future<ComicInfo> _comicFuture = _loadComic();
  late Key _comicFutureKey = UniqueKey();
  late Future<ViewLog?> _viewFuture = _loadViewLog();
  late Future<List<Ep>> _epListFuture = _loadEps();
  StreamSubscription<String?>? _linkSubscription;

  Future<ComicInfo> _loadComic() async {
    return await method.comicInfo(widget.comicId);
  }

  Future<List<Ep>> _loadEps() async {
    List<Ep> eps = [];
    var page = 0;
    late EpPage rsp;
    do {
      rsp = await method.comicEpPage(widget.comicId, ++page);
      eps.addAll(rsp.docs);
    } while (rsp.page < rsp.pages);
    return eps;
  }

  Future<ViewLog?> _loadViewLog() {
    return method.loadView(widget.comicId);
  }

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    routeObserver.subscribe(this, ModalRoute.of(context)!);
  }

  @override
  void didPopNext() {
    setState(() {
      _viewFuture = _loadViewLog();
    });
  }

  @override
  void initState() {
    if (widget.holdPkz) {
      _linkSubscription = linkSubscript(context);
    }
    super.initState();
  }

  @override
  void dispose() {
    _linkSubscription?.cancel();
    routeObserver.unsubscribe(this);
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return rightClickPop(
      child: buildScreen(context),
      context: context,
      canPop: true,
    );
  }

  Widget buildScreen(BuildContext context) {
    return FutureBuilder(
      key: _comicFutureKey,
      future: _comicFuture,
      builder: (BuildContext context, AsyncSnapshot<ComicInfo> snapshot) {
        if (snapshot.hasError) {
          return Scaffold(
            appBar: AppBar(),
            body: ContentError(
              error: snapshot.error,
              stackTrace: snapshot.stackTrace,
              onRefresh: () async {
                setState(() {
                  _comicFuture = _loadComic();
                  _comicFutureKey = UniqueKey();
                });
              },
            ),
          );
        }
        if (snapshot.connectionState != ConnectionState.done) {
          return Scaffold(
            appBar: AppBar(),
            body: const ContentLoading(label: '加载中'),
          );
        }
        var _comicInfo = snapshot.data!;
        var theme = Theme.of(context);
        var _tabs = <Widget>[
          Tab(text: '章节 (${_comicInfo.epsCount})'),
          Tab(text: '评论 (${_comicInfo.commentsCount})'),
          const Tab(text: '推荐'),
        ];
        var _views = <Widget>[
          _buildEpWrap(_epListFuture, _comicInfo),
          CommentList(CommentMainType.COMIC, _comicInfo.id),
          Recommendation(comicId: _comicInfo.id),
        ];
        return DefaultTabController(
          length: _tabs.length,
          child: Scaffold(
            appBar: AppBar(
              title: Text(_comicInfo.title),
              actions: [
                _buildDownloadAction(_epListFuture, _comicInfo),
              ],
            ),
            body: ListView(
              children: [
                ComicInfoCard(_comicInfo, linkItem: true),
                ComicTagsCard(_comicInfo.tags),
                ComicDescriptionCard(description: _comicInfo.description),
                Container(
                  padding: const EdgeInsets.all(10),
                  decoration: BoxDecoration(
                    border: Border(
                      bottom: BorderSide(
                        color: theme.dividerColor,
                      ),
                    ),
                  ),
                  child: Wrap(
                    alignment: WrapAlignment.spaceBetween,
                    children: [
                      Text.rich(TextSpan(
                        children: [
                          WidgetSpan(
                            child: GestureDetector(
                              onTap: () {
                                if (_comicInfo.creator.id != "") {
                                  navPushOrReplace(
                                    context,
                                    (context) => ComicsScreen(
                                      creatorId: _comicInfo.creator.id,
                                      creatorName: _comicInfo.creator.name,
                                    ),
                                  );
                                }
                              },
                              onLongPress: () {
                                confirmCopy(
                                  context,
                                  _comicInfo.creator.name,
                                );
                              },
                              child: Text(
                                _comicInfo.creator.name,
                                style: const TextStyle(
                                  fontSize: 14,
                                  color: Colors.grey,
                                ),
                              ),
                            ),
                          ),
                          const TextSpan(
                            text: "  ",
                            style: TextStyle(
                              fontSize: 14,
                              color: Colors.grey,
                            ),
                          ),
                          TextSpan(
                            text:
                                "( ${formatTimeToDate(_comicInfo.updatedAt)} )",
                            style: const TextStyle(
                              fontSize: 13,
                              color: Colors.grey,
                            ),
                          ),
                        ],
                      )),
                      GestureDetector(
                        onTap: () {
                          if (_comicInfo.chineseTeam != "") {
                            navPushOrReplace(
                              context,
                              (context) => ComicsScreen(
                                chineseTeam: _comicInfo.chineseTeam,
                              ),
                            );
                          }
                        },
                        onLongPress: () {
                          confirmCopy(context, _comicInfo.chineseTeam);
                        },
                        child: Text(
                          _comicInfo.chineseTeam,
                          style: const TextStyle(
                            fontSize: 13,
                            color: Colors.grey,
                          ),
                        ),
                      ),
                    ],
                  ),
                ),
                Container(height: 5),
                Container(
                  height: 40,
                  color: theme.colorScheme.secondary.withOpacity(.025),
                  child: TabBar(
                    tabs: _tabs,
                    indicatorColor: theme.colorScheme.secondary,
                    labelColor: theme.colorScheme.secondary,
                    onTap: (val) async {
                      setState(() {
                        _tabIndex = val;
                      });
                    },
                  ),
                ),
                Container(height: 15),
                _views[_tabIndex],
                Container(height: 5),
              ],
            ),
          ),
        );
      },
    );
  }

  Widget _buildDownloadAction(
    Future<List<Ep>> _epListFuture,
    ComicInfo _comicInfo,
  ) {
    return FutureBuilder(
      future: _epListFuture,
      builder: (BuildContext context, AsyncSnapshot<List<Ep>> snapshot) {
        if (snapshot.hasError) {
          return IconButton(
            onPressed: () {
              setState(() {
                this._epListFuture = _loadEps();
              });
            },
            icon: const Icon(Icons.sync_problem),
          );
        }
        if (snapshot.connectionState != ConnectionState.done) {
          return IconButton(onPressed: () {}, icon: const Icon(Icons.sync));
        }
        var _epList = snapshot.data!;
        return IconButton(
          onPressed: () async {
            Navigator.push(
              context,
              MaterialPageRoute(
                builder: (context) => DownloadConfirmScreen(
                  comicInfo: _comicInfo,
                  epList: _epList.reversed.toList(),
                ),
              ),
            );
          },
          icon: const Icon(Icons.download_rounded),
        );
      },
    );
  }

  Widget _buildEpWrap(Future<List<Ep>> _epListFuture, ComicInfo _comicInfo) {
    return ItemBuilder(
      future: _epListFuture,
      successBuilder: (BuildContext context, AsyncSnapshot<List<Ep>> snapshot) {
        var _epList = snapshot.data!;
        return Column(
          children: [
            ContinueReadButton(
              viewFuture: _viewFuture,
              onChoose: (int? epOrder, int? pictureRank) {
                if (epOrder != null && pictureRank != null) {
                  for (var i in _epList) {
                    if (i.order == epOrder) {
                      _push(_comicInfo, _epList, epOrder, pictureRank);
                      return;
                    }
                  }
                } else {
                  _push(
                      _comicInfo, _epList, _epList.reversed.first.order, null);
                  return;
                }
              },
            ),
            Wrap(
              spacing: 10,
              runSpacing: 10,
              alignment: WrapAlignment.spaceAround,
              children: [
                ..._epList.map((e) {
                  return MaterialButton(
                    onPressed: () {
                      _push(_comicInfo, _epList, e.order, null);
                    },
                    color: Colors.white,
                    child: Text(
                      e.title,
                      style: const TextStyle(color: Colors.black),
                    ),
                  );
                }),
              ],
            ),
          ],
        );
      },
      onRefresh: () async {
        setState(() {
          _epListFuture = _loadEps();
        });
      },
    );
  }

  void _push(ComicInfo comicInfo, List<Ep> epList, int order, int? rank) {
    Navigator.push(
      context,
      MaterialPageRoute(
        builder: (context) => ComicReaderScreen(
          comicInfo: comicInfo,
          epList: epList,
          currentEpOrder: order,
          initPicturePosition: rank,
        ),
      ),
    );
  }
}