class TemplatesView extends StatefulWidget {
  const TemplatesView({
    Key key,
  }) : super(key: key);

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

class _TemplatesViewState extends State<TemplatesView> {
  bool _showMyStories = false;
  @override
  void initState() {
    super.initState();
  }

  Widget build(BuildContext context) {
    return Scaffold(
      resizeToAvoidBottomPadding: false,
      appBar: AppBar(
        elevation: 0.0,
        backgroundColor: ThemeData.dark().scaffoldBackgroundColor,
        automaticallyImplyLeading: false,
        title: Text(
          _showMyStories ? 'My Stories' : I18n.of(context).templatesTitle,
          style: TextStyle(
            fontWeight: FontWeight.w100,
            fontSize: 16,
          ),
        ),
        actions: <Widget>[
          IconButton(
            tooltip: 'My Stories',
            icon: Icon(_showMyStories ? Icons.grid_on : Icons.person),
            onPressed: () {
              if (mounted)
                setState(() {
                  _showMyStories = !_showMyStories;
                });
            },
          ),
        ],
      ),
      body: Container(
        color: ThemeData.dark().scaffoldBackgroundColor,
        padding: EdgeInsets.only(left: 10, right: 10),
        child: IndexedStack(
          index: _showMyStories ? 1 : 0,
          children: <Widget>[
            _buildStoriesList(
              context,
              Provider.of<TemplatesModel>(context, listen: false).templates,
            ),
            _buildStoriesList(
              context,
              Provider.of<StoriesModel>(context, listen: false).stories,
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildStoriesList(
      BuildContext context, ValueNotifier<List<AmpStory>> listen) {
    return LayoutBuilder(
      builder: (context, dimens) => ValueListenableBuilder<List<AmpStory>>(
          valueListenable: listen,
          builder: (context, stories, child) {
            if (stories == null) {
              return Container(
                child: Center(
                  child: CircularProgressIndicator(),
                ),
              );
            }
            if (stories.isEmpty) {
              return Container(
                child: Center(
                  child: Text(
                    'No Templates',
                    style:
                        TextStyle(color: ThemeData.dark().textSelectionColor),
                  ),
                ),
              );
            }
            return Scrollbar(
              child: GridView.builder(
                gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
                    crossAxisCount: (dimens.maxWidth / 175).ceil(),
                    childAspectRatio: 9 / 16),
                itemCount: stories.length,
                itemBuilder: (context, index) {
                  final story = stories[index];
                  return PremiumTemplatePreview(story: story);
                },
              ),
            );
          }),
    );
  }
}

class PremiumTemplatePreview extends StatefulWidget {
  final AmpStory story;

  const PremiumTemplatePreview({
    Key key,
    @required this.story,
  }) : super(key: key);

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

class _PremiumTemplatePreviewState extends State<PremiumTemplatePreview>
    with SingleTickerProviderStateMixin {
  AnimationController animationController;
  Animation<double> animation;

  @override
  void initState() {
    super.initState();
    animationController = AnimationController(
      vsync: this,
      duration: Duration(milliseconds: 100),
    )..addListener(() => setState(() {}));
    animation = Tween<double>(begin: 0.9, end: 1).animate(animationController);
  }

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

  @override
  Widget build(BuildContext context) {
    return MouseRegion(
      onEnter: (_) {
        animationController.forward();
      },
      onExit: (_) {
        animationController.reverse();
      },
      child: Container(
        constraints: BoxConstraints.expand(
          height: 200.0,
        ),
        child: AnimatedBuilder(
          animation: animation,
          builder: (context, child) => Container(
              padding: EdgeInsets.all(2),
              decoration: BoxDecoration(
                borderRadius: BorderRadius.circular(5),
              ),
              child: Transform.scale(
                scale: animation.value,
                child: InkWell(
                  child: Stack(
                    children: <Widget>[
                      Positioned.fill(
                        child: Image.network(
                          widget.story?.image != null &&
                                  widget.story.image.isNotEmpty
                              ? widget.story.image
                              : 'https://firebasestorage.googleapis.com/v0/b/ampstor.appspot.com/o/images%2FAmpstor_Android_story.png?alt=media&token=1d08b404-64e7-4bb9-94c0-9c74121bfcc9',
                          fit: BoxFit.cover,
                        ),
                      ),
                      Positioned(
                        right: 5.0,
                        top: 5.0,
                        child: Text(
                          'FREE',
                          style: TextStyle(
                            color: Colors.white,
                            fontWeight: FontWeight.bold,
                            fontSize: 9,
                          ),
                        ),
                      ),
                      Positioned(
                        right: 5.0,
                        bottom: 5.0,
                        child: Text(
                          widget.story.name,
                          style: TextStyle(
                            color: Colors.white,
                            fontWeight: FontWeight.bold,
                            fontSize: 9,
                          ),
                        ),
                      ),
                    ],
                  ),
                  onTap: () async {
                    final _story = widget.story;
                    final value = await showDialog<bool>(
                        context: context,
                        builder: (context) => Center(
                              child: Material(
                                elevation: 10,
                                color: Colors.transparent,
                                child: Column(
                                  mainAxisSize: MainAxisSize.min,
                                  children: <Widget>[
                                    SizedBox(
                                      width: defaultDevice.width,
                                      height: defaultDevice.height,
                                      child: AspectRatio(
                                        aspectRatio: 1,
                                        child: MobileView(
                                          story: _story,
                                          showDownloadImage: false,
                                        ),
                                      ),
                                    ),
                                    RaisedButton(
                                      child: Text(
                                        'Select this template',
                                        style: TextStyle(
                                            color: UIColors.greyishBrown),
                                      ),
                                      onPressed: () {
                                        Navigator.maybePop(context, true);
                                      },
                                    )
                                  ],
                                ),
                              ),
                            ));
                    if (value != null && value)
                      showDialog(
                        context: context,
                        builder: (BuildContext context) {
                          return AlertDialog(
                            title: Text(
                              'You are about to apply new template and lose all content!',
                              style: TextStyle(fontSize: 14),
                            ),
                            content: Text(
                              "Are you sure want to proceed ?",
                              style: TextStyle(fontSize: 12),
                            ),
                            actions: <Widget>[
                              InkWell(
                                  child: Container(
                                      padding: EdgeInsets.symmetric(
                                          vertical: 8.0, horizontal: 20),
                                      child: Text("YES")),
                                  onTap: () {
                                    Provider.of<StoryModel>(context,
                                            listen: false)
                                        .overrideStory(widget.story, true);

                                    Navigator.of(context).pop();
                                    final _model = Provider.of<StoryModel>(
                                        context,
                                        listen: false);
                                    _model.updateTemplateCount();
                                  }),

                              FlatButton(
                                child: Text("NO"),
                                onPressed: () {
                                  //Put your code here which you want to execute on No button click.
                                  Navigator.of(context).pop();
                                },
                              ),

//            FlatButton(
//              child: Text("CANCEL"),
//              onPressed: () {
//                //Put your code here which you want to execute on Cancel button click.
//                Navigator.of(context).pop();
//              },
//            ),
                            ],
                          );
                        },
                      );
                  },
                ),
              )),
        ),
      ),
    );
  }
}