import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';

import '/views/authentication/unauthenticated_landing.dart';

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

    @override
    State<ConversationsList> createState() => _ConversationsListState();
}

class _ConversationsListState extends State<ConversationsList> {
    @override
    void initState() {
        checkLogin();

        super.initState();
    }

    final _suggestions = <String>[];
    final _biggerFont = const TextStyle(fontSize: 18);

    Future checkLogin() async {
        SharedPreferences preferences = await SharedPreferences.getInstance();
        print(preferences.getBool('islogin'));
        if (preferences.getBool('islogin') != true) {
            setState(() {
                Navigator.of(context).push(MaterialPageRoute(
                                builder: (context) => const UnauthenticatedLandingWidget(),
                ));
            });
        }
    }

    Widget list() {

        if (_suggestions.isEmpty) {
            return const Center(
                    child: Text('No Conversations'),
            );
        }

        return ListView.builder(
                itemCount: _suggestions.length,
                padding: const EdgeInsets.all(16.0),
                itemBuilder: /*1*/ (context, i) {
                    //if (i >= _suggestions.length) {
                    // TODO: Check for more conversations here. Remove the itemCount to use this section
                    //_suggestions.addAll(generateWordPairs().take(10)); /*4*/
                    //}
                    return Column(
                            children: [
                                ListTile(
                                        title: Text(
                                                _suggestions[i],
                                                style: _biggerFont,
                                        ),
                                ),
                                const Divider(),
                            ]
                    );
                },
        );
    }

    @override
    Widget build(BuildContext context) {
        return WillPopScope(
                onWillPop: () async => false,
                child: Scaffold(
                        appBar: AppBar(
                                title: Text('Envelope'),
                                actions: <Widget>[
                                    PopupMenuButton(
                                            icon: const FaIcon(FontAwesomeIcons.ellipsisVertical, color: Colors.white, size: 40),
                                            itemBuilder: (context) => [
                                                const PopupMenuItem<int>(
                                                        value: 0,
                                                        child: Text("Settings"),
                                                ),
                                                const PopupMenuItem<int>(
                                                        value: 1,
                                                        child: Text("Logout"),
                                                ),

                                            ],
                                            onSelected: (item) => selectedMenuItem(context, item),
                                    ),
                                ],
                        ),
                        body: list(),
                ),
        );
    }

    void selectedMenuItem(BuildContext context, item) async {
        switch (item) {
            case 0:
                print("Settings");
                break;
            case 1:
                SharedPreferences preferences = await SharedPreferences.getInstance();
                preferences.setBool('islogin', false);
                Navigator.of(context).push(MaterialPageRoute(
                                builder: (context) => const UnauthenticatedLandingWidget(),
                ));
                break;
        }
    }
}