import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Names',
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() {
    return _MyHomePageState();
  }
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Lot 1')),
      body: _buildBody(context),
    );
  }

  Widget _buildBody(BuildContext context) {
    return StreamBuilder<QuerySnapshot>(
      stream: Firestore.instance.collection('Lot1').snapshots(),
      builder: (context, snapshot) {
        if (!snapshot.hasData) return LinearProgressIndicator();

        return _buildList(context, snapshot.data.documents);
      },
    );
  }

  Widget _buildList(BuildContext context, List<DocumentSnapshot> snapshot) {
    return ListView(
      padding: const EdgeInsets.only(top: 20.0),
      children: snapshot.map((data) => _buildListItem(context, data)).toList(),
    );
  }

  Widget _buildListItem(BuildContext context, DocumentSnapshot data) {
    final record = Record.fromSnapshot(data);

    return Padding(
      key: ValueKey(record.stall),
      padding: const EdgeInsets.symmetric(horizontal: 16.0, vertical: 8.0),
      child: Container(
        decoration: BoxDecoration(
          border: Border.all(color: Colors.blue),
          borderRadius: BorderRadius.circular(5.0),
        ),
        child: ListTile(
          title: Text("Stall #" + record.stall.toString()),
          trailing: Text("Open: " + record.open.toString()),

//          onTap: () => Firestore.instance.runTransaction((transaction) async {
//          final freshSnapshot = await transaction.get(record.reference);
//          final fresh = Record.fromSnapshot(freshSnapshot);
//
//          await transaction
//              .update(record.reference, {'votes': fresh.votes + 1});
//        }),
        ),
      ),
    );
  }
}

class Record {
  final int stall;
  final int passID;
  final bool open;
  final bool handicap;
  final DocumentReference reference;

  Record.fromMap(Map<String, dynamic> map, {this.reference})
      : assert(map['handicap'] != null),
        assert(map['stall'] != null),
        assert(map['passID'] != null),
        assert(map['open'] != null),
        stall = map['stall'],
        passID = map['passID'],
        open = map['open'],
        handicap = map['handicap'];



  Record.fromSnapshot(DocumentSnapshot snapshot)
      : this.fromMap(snapshot.data, reference: snapshot.reference);

  @override
  String toString() => "Record<$stall>";
}