import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/material.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
import 'package:intl/intl.dart';
import 'package:scrollable_positioned_list/scrollable_positioned_list.dart';
import 'package:tasktracker/NewJournal.dart';
import 'package:tasktracker/main.dart';
import 'User.dart' as User;
import 'Dialogs.dart';

class JournalPage extends StatefulWidget {
  const JournalPage({Key? key}) : super(key: key);

  @override
  State<JournalPage> createState() => _JournalPageState();
}

class _JournalPageState extends State<JournalPage>{

  bool selecting = false;
  List<int> selectedIndexes = [];
  int expandedIndex = -1;
  var refreshStream;

  @override
  void initState() {
    // TODO: implement initState
    super.initState();

    refreshStream = User.refreshStream.stream.listen((event) {if(!event){setState(() {

    });}});

  }

  @override
  void dispose() {
    // TODO: implement dispose
    super.dispose();
    refreshStream?.close();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      floatingActionButton: FloatingActionButton.extended(
          onPressed: () {
            Navigator.of(context).push(MaterialPageRoute(builder: (context) => NewJournal())).then((val) {
              setState(() {});
            });
          },
          label: Text("New Entry"),
          icon: Icon(Icons.add)),
      appBar: AppBar(
        title: Row(
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          children: [
            Row(
              children: [
                FaIcon(FontAwesomeIcons.bookJournalWhills),
                SizedBox(
                  width: 15,
                ),
                Text('Journal')
              ],
            ),
            Row(
              children: [
                if(selecting && selectedIndexes.length > 0)InkWell(onTap:() async{
                  selecting=false;
                  for (int element in selectedIndexes) {
                    await User.UserOperations.deleteJournal(User.journal[element].id);
                  }setState(() {

                  });
                },child: Container(margin:EdgeInsets.all(8),child: Icon(Icons.delete))),
                if(selecting)InkWell(onTap:(){
                  selecting=false;
                  setState(() {

                  });
                },child: Container(margin:EdgeInsets.all(8),child: Icon(Icons.cancel))),
                if(!selecting)InkWell(onTap:(){setState(() {

                });},child: Container(margin: EdgeInsets.all(8), child: Icon(Icons.refresh),))
              ],
            )
          ],
        ),
      ),
      drawer: navDrawer(context, 8),
      body: Container(
        padding: EdgeInsets.all(8),
        child: ScrollablePositionedList.builder(
            itemCount: User.journal.length,
            itemBuilder: (context, index) {
              int charCount = '\n'.allMatches(User.journal[index].description ?? '').length * 50;
              charCount +=(User.journal[index].description ?? '').length;
              int maxCharCount = 100;
              return Container(
                  child: InkWell(
                    onTap: (){
                      if(selecting){
                        if(selectedIndexes.contains(index)){
                          selectedIndexes.remove(index);
                        }else{
                          selectedIndexes.add(index);
                        }
                        setState(() {

                        });
                      }else{
                        if(expandedIndex==index){
                          expandedIndex=-1;
                          //_controller..reverse(from: 0.5);
                        }else {
                          expandedIndex = index;
                         // _controller..forward(from: 0);
                        }
                        setState(() {

                        });
                      }
                    },
                onLongPress: () {
                  selecting = !selecting;
                  if(!selectedIndexes.contains(index)){selectedIndexes.add(index);}
                  setState(() {});
                },
                child: Row(
                  children: [
                    if (selecting)
                      Checkbox(
                        value: selectedIndexes.contains(index),
                        onChanged: (newVal) {
                          if(selectedIndexes.contains(index)){
                            selectedIndexes.remove(index);
                          }else{
                            selectedIndexes.add(index);
                          }
                          setState(() {

                          });
                        },
                      ),
                    Expanded(
                      child: Card(
                          child: Padding(
                        padding: const EdgeInsets.all(8.0),
                        child: AnimatedContainer(
                          duration: Duration(seconds: 1),
                          child: Column(
                            crossAxisAlignment: CrossAxisAlignment.start,
                            children: [
                              Row(
                                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                                children: [
                                  (User.journal[index].title!=null && User.journal[index].title!.isNotEmpty) ?
                                  Text(User.journal[index].title!, style: TextStyle(fontSize: 18)) :
                                  Text(DateFormat('MMMM-dd').format( User.journal[index].day),  style: TextStyle(fontSize: 18)),
                                  Container(padding:EdgeInsets.symmetric(horizontal: 10,vertical: 2),decoration: BoxDecoration(borderRadius: BorderRadius.circular(20),color: Colors.black26),child: Text(DateFormat('yyyy-MM-dd').format(User.journal[index].day)))
                                ],
                              ),
                              SizedBox(height: 5,),
                              if (User.journal[index].description != null && User.journal[index].description!.isNotEmpty)
                                (charCount > maxCharCount && expandedIndex != index) ?
                                Text(User.journal[index].description!.substring(0,maxCharCount) + '...')  :
                                Text(User.journal[index].description!),

                              if(charCount>maxCharCount) Row(
                                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                                children: [
                                  Container(),
                                  (index == expandedIndex)? Icon(Icons.keyboard_arrow_up) : Icon(Icons.keyboard_arrow_down)

                                ],
                              )
                            ],
                          ),
                        ),
                      ),
                      ),
                    ),
                    if(selecting)InkWell(onTap:(){
                      Navigator.of(context).push(MaterialPageRoute(builder: (context) => NewJournal(date: User.journal[index].day, title: User.journal[index].title, text: User.journal[index].description,))).then((val) {
                        setState(() {});
                      });
                      selecting=false;
                      setState(() {

                      });
                    },child: Container(margin:EdgeInsets.all(8),child: FaIcon(FontAwesomeIcons.edit)))
                  ],
                ),
              ));
            }),
      ),
    );
  }
}