import 'dart:io';
import 'dart:convert';
import 'dart:async';
import 'dart:math' as math;

import 'package:flutter/material.dart';
import 'package:color_thief_flutter/color_thief_flutter.dart';
import 'package:dio/dio.dart';
import 'package:flutter/services.dart';
import 'package:provider/provider.dart';
import 'package:fluttertoast/fluttertoast.dart';
import 'package:cached_network_image/cached_network_image.dart';

import '../type/searchpodcast.dart';
import '../state/subscribe_podcast.dart';
import '../util/context_extension.dart';
import '../webfeed/webfeed.dart';
import '../.env.dart';

class MyHomePageDelegate extends SearchDelegate<int> {
  final String searchFieldLabel;

  MyHomePageDelegate({this.searchFieldLabel})
      : super(
          searchFieldLabel: searchFieldLabel,
        );

  //static Future<List> getList(String searchText) async {
  //  String apiKey = environment['apiKey'];
  //  String url =
  //      "https://listennotes.p.rapidapi.com/api/v1/search?only_in=title%2Cdescription&q=" +
  //          "$searchText&type=podcast";
  //  Response response = await Dio().get(url,
  //      options: Options(headers: {
  //        'X-RapidAPI-Key': "$apiKey",
  //        'Accept': "application/json"
  //      }));
  //  Map searchResultMap = jsonDecode(response.toString());
  //  var searchResult = SearchPodcast.fromJson(searchResultMap);
  //  return searchResult.results;
  //}

  static Future getRss(String url) async {
    try {
      BaseOptions options = new BaseOptions(
        connectTimeout: 10000,
        receiveTimeout: 10000,
      );
      Response response = await Dio(options).get(url);
      var p = RssFeed.parse(response.data);
      return OnlinePodcast(
          rss: url,
          title: p.title,
          publisher: p.author,
          description: p.description,
          image: p.itunes.image.href);
    } catch (e) {
      throw e;
    }
  }

  RegExp rssExp = RegExp(r'^(https?):\/\/(.*)');
  Widget invalidRss() => Container(
        height: 50,
        alignment: Alignment.center,
        child: Text('Invalid rss link'),
      );

  @override
  ThemeData appBarTheme(BuildContext context) => Theme.of(context);

  @override
  Widget buildLeading(BuildContext context) {
    return IconButton(
      tooltip: 'Back',
      icon: AnimatedIcon(
        icon: AnimatedIcons.menu_arrow,
        progress: transitionAnimation,
      ),
      onPressed: () {
        close(context, 1);
      },
    );
  }

  @override
  Widget buildSuggestions(BuildContext context) {
    // if (query.isEmpty)
    return Center(
        child: Container(
      padding: EdgeInsets.only(top: 400),
      child: Image(
        image: Theme.of(context).brightness == Brightness.light
            ? AssetImage('assets/listennotes.png')
            : AssetImage('assets/listennotes_light.png'),
        height: 20,
      ),
    ));
    // else if (rssExp.stringMatch(query) != null)
    //   return FutureBuilder(
    //     future: getRss(rssExp.stringMatch(query)),
    //     builder: (context, snapshot) {
    //       if (snapshot.hasError)
    //         return invalidRss();
    //       else if (snapshot.hasData)
    //         return SearchResult(
    //           onlinePodcast: snapshot.data,
    //         );
    //       else
    //         return Container(
    //           padding: EdgeInsets.only(top: 200),
    //           alignment: Alignment.topCenter,
    //           child: CircularProgressIndicator(),
    //         );
    //     },
    //   );
    // else
    //   return FutureBuilder(
    //     future: getList(query),
    //     builder: (BuildContext context, AsyncSnapshot<List> snapshot) {
    //       if (!snapshot.hasData && query != null)
    //         return Container(
    //           padding: EdgeInsets.only(top: 200),
    //           alignment: Alignment.topCenter,
    //           child: CircularProgressIndicator(),
    //         );
    //       List content = snapshot.data;
    //       return ListView.builder(
    //         scrollDirection: Axis.vertical,
    //         itemCount: content.length,
    //         itemBuilder: (BuildContext context, int index) {
    //           return SearchResult(
    //             onlinePodcast: content[index],
    //           );
    //         },
    //       );
    //     },
    //   );
  }

  @override
  List<Widget> buildActions(BuildContext context) {
    return <Widget>[
      if (query.isEmpty)
        Center()
      else
        IconButton(
          tooltip: 'Clear',
          icon: const Icon(Icons.clear),
          onPressed: () {
            query = '';
          },
        ),
    ];
  }

  @override
  Widget buildResults(BuildContext context) {
    if (query.isEmpty)
      return Container(
        height: 10,
        width: 10,
        margin: EdgeInsets.only(top: 400),
        child: SizedBox(
          height: 10,
          child: Image.asset(
            'assets/listennote.png',
            fit: BoxFit.fill,
          ),
        ),
      );
    else if (rssExp.stringMatch(query) != null)
      return FutureBuilder(
        future: getRss(rssExp.stringMatch(query)),
        builder: (context, snapshot) {
          if (snapshot.hasError)
            return invalidRss();
          else if (snapshot.hasData)
            return SearchResult(
              onlinePodcast: snapshot.data,
            );
          else
            return Container(
              padding: EdgeInsets.only(top: 200),
              alignment: Alignment.topCenter,
              child: CircularProgressIndicator(),
            );
        },
      );
    else
      return SearchList(
        query: query,
      );
    // return FutureBuilder(
    //   future: getList(query),
    //   builder: (BuildContext context, AsyncSnapshot<List> snapshot) {
    //     if (!snapshot.hasData && query != null)
    //       return Container(
    //         padding: EdgeInsets.only(top: 200),
    //         alignment: Alignment.topCenter,
    //         child: CircularProgressIndicator(),
    //       );
    //     List content = snapshot.data;
    //     return ListView.builder(
    //       scrollDirection: Axis.vertical,
    //       itemCount: content.length,
    //       itemBuilder: (BuildContext context, int index) {
    //         return SearchResult(
    //           onlinePodcast: content[index],
    //         );
    //       },
    //     );
    //   },
    // );
  }
}

class SearchList extends StatefulWidget {
  final String query;
  SearchList({this.query, Key key}) : super(key: key);

  @override
  _SearchListState createState() => _SearchListState();
}

class _SearchListState extends State<SearchList> {
  int _nextOffset;
  List<OnlinePodcast> _podcastList;
  int _offset;
  bool _loading;
  @override
  void initState() {
    super.initState();
    _nextOffset = 0;
    _podcastList = [];
  }

  Future<List> _getList(String searchText, int nextOffset) async {
    String apiKey = environment['apiKey'];
    String url = "https://listen-api.listennotes.com/api/v2/search?q=" +
        searchText +
        "&sort_by_date=0&type=podcast&offset=$nextOffset";
    Response response = await Dio().get(url,
        options: Options(headers: {
          'X-ListenAPI-Key': "$apiKey",
          'Accept': "application/json"
        }));
    Map searchResultMap = jsonDecode(response.toString());
    var searchResult = SearchPodcast.fromJson(searchResultMap);
    _offset = searchResult.nextOffset;
    _podcastList.addAll(searchResult.results.cast());
    _loading = false;
    return _podcastList;
  }

  @override
  Widget build(BuildContext context) {
    return FutureBuilder<List>(
      future: _getList(widget.query, _nextOffset),
      builder: (BuildContext context, AsyncSnapshot<List> snapshot) {
        if (!snapshot.hasData && widget.query != null)
          return Container(
            padding: EdgeInsets.only(top: 200),
            alignment: Alignment.topCenter,
            child: CircularProgressIndicator(),
          );
        var content = snapshot.data;
        return CustomScrollView(
          slivers: [
            SliverList(
              delegate: SliverChildBuilderDelegate(
                (context, index) {
                  return SearchResult(
                    onlinePodcast: content[index],
                  );
                },
                childCount: content.length,
              ),
            ),
            SliverToBoxAdapter(
              child: Row(
                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                mainAxisSize: MainAxisSize.min,
                children: [
                  Padding(
                    padding: const EdgeInsets.only(top: 10.0, bottom: 20.0),
                    child: SizedBox(
                        height: 30,
                        child: OutlineButton(
                            shape: RoundedRectangleBorder(
                                borderRadius:
                                    BorderRadius.all(Radius.circular(15))),
                            child: _loading
                                ? SizedBox(
                                    height: 20,
                                    width: 20,
                                    child: CircularProgressIndicator(
                                      strokeWidth: 2,
                                    ))
                                : Text('Load more'),
                            onPressed: () => _loading
                                ? null
                                : setState(() {
                                    _loading = true;
                                    _nextOffset = _offset;
                                  }))),
                  )
                ],
              ),
            )
          ],
        );
      },
    );
  }
}

class SearchResult extends StatefulWidget {
  final OnlinePodcast onlinePodcast;
  SearchResult({this.onlinePodcast, Key key}) : super(key: key);
  @override
  _SearchResultState createState() => _SearchResultState();
}

class _SearchResultState extends State<SearchResult>
    with SingleTickerProviderStateMixin {
  bool _issubscribe;
  bool _showDes;
  AnimationController _controller;
  Animation _animation;
  double _value;
  @override
  void initState() {
    super.initState();
    _issubscribe = false;
    _showDes = false;
    _value = 0;
    _controller =
        AnimationController(vsync: this, duration: Duration(milliseconds: 300));
    _animation = Tween<double>(begin: 0.0, end: 1.0).animate(_controller)
      ..addListener(() {
        setState(() {
          _value = _animation.value;
        });
      });
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  Future<String> getColor(File file) async {
    final imageProvider = FileImage(file);
    var colorImage = await getImageFromProvider(imageProvider);
    var color = await getColorFromImage(colorImage);
    String primaryColor = color.toString();
    return primaryColor;
  }

  @override
  Widget build(BuildContext context) {
    var subscribeWorker = Provider.of<SubscribeWorker>(context, listen: false);

    savePodcast(OnlinePodcast podcast) {
      SubscribeItem item =
          SubscribeItem(podcast.rss, podcast.title, imgUrl: podcast.image);
      subscribeWorker.setSubscribeItem(item);
    }

    return Container(
      decoration: BoxDecoration(
        border: Border(
          bottom: Divider.createBorderSide(context),
        ),
      ),
      child: Column(
        mainAxisAlignment: MainAxisAlignment.start,
        mainAxisSize: MainAxisSize.min,
        children: <Widget>[
          ListTile(
            contentPadding: EdgeInsets.symmetric(horizontal: 20.0),
            onTap: () {
              setState(() {
                _showDes = !_showDes;
                if (_value == 0)
                  _controller.forward();
                else
                  _controller.reverse();
              });
            },
            leading: ClipRRect(
              borderRadius: BorderRadius.all(Radius.circular(20.0)),
              child: CachedNetworkImage(
                height: 40.0,
                width: 40.0,
                fit: BoxFit.fitWidth,
                alignment: Alignment.center,
                imageUrl: widget.onlinePodcast.image,
                progressIndicatorBuilder: (context, url, downloadProgress) =>
                    Container(
                  height: 40,
                  width: 40,
                  alignment: Alignment.center,
                  color: context.primaryColorDark,
                  child: SizedBox(
                    width: 20,
                    height: 2,
                    child: LinearProgressIndicator(
                        value: downloadProgress.progress),
                  ),
                ),
                errorWidget: (context, url, error) => Container(
                    width: 40,
                    height: 40,
                    alignment: Alignment.center,
                    color: context.primaryColorDark,
                    child: Icon(Icons.error)),
              ),
            ),
            title: Text(widget.onlinePodcast.title),
            subtitle: Text(widget.onlinePodcast.publisher ?? ''),
            trailing: Row(
              mainAxisAlignment: MainAxisAlignment.start,
              mainAxisSize: MainAxisSize.min,
              children: <Widget>[
                Transform.rotate(
                  angle: math.pi * _value,
                  child: Icon(Icons.keyboard_arrow_down),
                ),
                Padding(padding: EdgeInsets.only(right: 10.0)),
                Container(
                  width: 100,
                  height: 35,
                  child: !_issubscribe
                      ? OutlineButton(
                          highlightedBorderColor: context.accentColor,
                          splashColor: context.accentColor.withOpacity(0.8),
                          child: Text('Subscribe',
                              style: TextStyle(
                                  color: Theme.of(context).accentColor)),
                          onPressed: () {
                            savePodcast(widget.onlinePodcast);
                            setState(() => _issubscribe = true);
                            Fluttertoast.showToast(
                              msg: 'Podcast subscribed',
                              gravity: ToastGravity.BOTTOM,
                            );
                          })
                      : OutlineButton(
                          color: context.accentColor.withOpacity(0.8),
                          highlightedBorderColor: Colors.grey[500],
                          disabledTextColor: Colors.grey[500],
                          child: Text('Subscribe'),
                          disabledBorderColor: Colors.grey[500],
                          onPressed: () {}),
                ),
              ],
            ),
          ),
          _showDes
              ? Container(
                  alignment: Alignment.centerLeft,
                  decoration: BoxDecoration(
                      color: Theme.of(context).accentColor,
                      borderRadius: BorderRadius.only(
                        topRight: Radius.circular(15.0),
                        bottomLeft: Radius.circular(15.0),
                        bottomRight: Radius.circular(15.0),
                      )),
                  margin: EdgeInsets.only(left: 70, right: 50, bottom: 10.0),
                  padding: EdgeInsets.all(15.0),
                  child: Text(
                    widget.onlinePodcast.description.trim(),
                    maxLines: 3,
                    overflow: TextOverflow.ellipsis,
                    style: Theme.of(context)
                        .textTheme
                        .bodyText1
                        .copyWith(color: Colors.white),
                  ),
                )
              : Center(),
        ],
      ),
    );
  }
}