import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:mdi/mdi.dart';
import 'package:path_provider/path_provider.dart';
import 'package:path/path.dart';
import 'package:jisho_study_tool/objectbox.g.dart';

import 'package:jisho_study_tool/bloc/database/database_bloc.dart';
import 'package:jisho_study_tool/bloc/kanji/kanji_bloc.dart';
import 'package:jisho_study_tool/bloc/search/search_bloc.dart';

import 'package:jisho_study_tool/view/screens/kanji/view.dart';
import 'package:jisho_study_tool/view/screens/history.dart';
import 'package:jisho_study_tool/view/screens/search/view.dart';


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

DatabaseBloc _databaseBloc = DatabaseBloc();

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Jisho Study Tool',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MultiBlocProvider(
        providers: [
          BlocProvider(create: (context) => SearchBloc(_databaseBloc)),
          BlocProvider(create: (context) => KanjiBloc(_databaseBloc)),
          BlocProvider(create: (context) => _databaseBloc),
        ],
        child: Home(),
      ),
    );
  }
}

class Home extends StatefulWidget {
  @override
  _HomeState createState() => _HomeState();
}

class _HomeState extends State<Home> {
  int selectedPage = 0;

  late final Store _store;

  @override
  void initState() {
    super.initState();

    getApplicationDocumentsDirectory()
      .then((dir) {
        _store = Store(
          getObjectBoxModel(),
          directory: join(dir.path, 'objectbox'),
        );

        _databaseBloc.add(ConnectedToDatabase(_store));
      });
  }

  @override
  void dispose() {
    _store.close();
    _databaseBloc.add(DisconnectedFromDatabase());
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return BlocBuilder<DatabaseBloc, DatabaseState>(
      builder: (context, state) {

        if (state is DatabaseDisconnected) {
          return Center(
            child: CircularProgressIndicator(),
          );
        }

        return Scaffold(
          appBar: AppBar(
            title: pages[selectedPage].titleBar,
            centerTitle: true,
          ),
          body: pages[selectedPage].content,
          bottomNavigationBar: BottomNavigationBar(
            currentIndex: selectedPage,
            onTap: (int index) {
              setState(() {
                selectedPage = index;
              });
            },
            items: navBar,
            showSelectedLabels: false,
            showUnselectedLabels: false,
            unselectedItemColor: Colors.blue,
            selectedItemColor: Colors.green,
          ),
        );
      },
    );
  }
}

final List<BottomNavigationBarItem> navBar = [
  BottomNavigationBarItem(
    label: 'Search',
    icon: Icon(Icons.search),
  ),
  BottomNavigationBarItem(
      label: 'Kanji',
      icon: Icon(
        Mdi.ideogramCjk,
        size: 30,
      )),
  BottomNavigationBarItem(
    label: 'History',
    icon: Icon(Icons.history),
  ),
  BottomNavigationBarItem(
    label: 'Memorize',
    icon: Icon(Icons.bookmark),
  ),
  BottomNavigationBarItem(
    label: 'Settings',
    icon: Icon(Icons.settings),
  ),
];

class _Page {
  Widget content;
  Widget titleBar;

  _Page({
    required this.content,
    required this.titleBar,
  });
}

final List<_Page> pages = [
  _Page(
    content: SearchView(),
    titleBar: Text('Search'),
  ),
  _Page(
    content: KanjiView(),
    titleBar: KanjiViewBar(),
  ),
  _Page(
    content: HistoryView(),
    titleBar: Text("History"),
  ),
  _Page(
    content: Container(),
    titleBar: Text("Memorization"),
  ),
  _Page(
    content: Container(),
    titleBar: Text("Settings"),
  ),
];