import 'package:flutter/material.dart';
import 'package:rezervisanje/globals.dart' as globals;
import 'dart:async';
import 'package:cloud_firestore/cloud_firestore.dart';

class ReserveTable extends StatefulWidget {
  @override
  _ReserveTableState createState() => _ReserveTableState();
}

class _ReserveTableState extends State<ReserveTable> {
  var sum;
  var step = 0;
  var hours = 0;
  var minutes = 0;
  DateTime times;
  final List<LoadList> terminlist = new List();
  final List<LoadList> items = new List();
  final formKey = GlobalKey<FormState>();
  Future<int> firebaseQuery;
  @override
  void initState() {
    super.initState();
    firebaseQuery = Firestore.instance
        .collection('salons')
        .document(globals.salonkey)
        .get()
        .then((document) {
      setState(() {
        globals.shiftstart = document.data['firstshiftstart'];
        globals.shiftend = document.data['firstshiftend'];
      });
    });
  }

  @override
  Widget build(BuildContext context) {
    if (globals.day == null) {
      globals.day = DateTime(
          DateTime.now().year, DateTime.now().month, DateTime.now().day);
    }
    times = globals.day.add(new Duration(days: -1));
    new FutureBuilder(
      future: firebaseQuery,
      builder: (context, snapshot) {
        if (snapshot.hasError) {
          print("snapErr");//not getting printed
          return new Text("${snapshot.error}");
        } else
          items.clear();
        print("SHIFTEND " + globals.shiftend.toString());//not getting printed
      },
    );
    new StreamBuilder<QuerySnapshot>(
        stream: Firestore.instance
            .collection('termins')
            .where('time', isLessThanOrEqualTo: globals.day)
            .where('time', isGreaterThanOrEqualTo: times)
            .where('employeeID', isEqualTo: globals.employeeID)
            .snapshots(),
        builder: (context, AsyncSnapshot<QuerySnapshot> snapshot) {
          print("2");//not getting printed
          if (!snapshot.hasData)
            return const Text('Connecting...');
          else {
            print('3');//not getting printed
            sum = snapshot.data.documents.length;
            for (int i = 0; i < sum; i++) {
              DocumentSnapshot items = snapshot.data.documents[i];
              DateTime date = items['time'];
              terminlist.add(new LoadList(date.hour, date.minute));
            }
          }
        });

    int div =
        ((globals.shiftend - globals.shiftstart) * 60 / globals.requiredtime)
            .round();
    hours = globals.shiftstart;
    for (var i = 0; i < div; i++) {
      if (minutes == 60) {
        minutes = 0;
        hours = hours + 1;
      }
      items.add(new LoadList(hours, minutes));
      minutes += globals.requiredtime;
    }

    return new Scaffold(
        appBar: new AppBar(
          title:
              new Text(globals.employee == "" ? "Reserve" : globals.employee),
          backgroundColor: Colors.deepOrange,
        ),
        drawer: new Drawer(
            child: new ListView(children: <Widget>[
          new ListTile(
              title: new Text("Close"),
              trailing: new Icon(Icons.arrow_upward),
              onTap: () {
                Navigator.of(context).pop();
              })
        ])),
        body: Card(
            child: Padding(
          padding: EdgeInsets.all(8.0),
          child: Form(
              key: formKey,
              child: new ListView.builder(
                  scrollDirection: Axis.vertical,
                  itemCount: items.length,
                  itemBuilder: (context, index) {
                    print(sum);//only this is getting printed,its null
                  })),
        )));
  }
}

class LoadList {
  final hours;
  final minutes;
  LoadList(this.hours, this.minutes);
}