import 'dart:io';
import 'dart:developer' as developer;

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:logging/logging.dart';

import 'app/app.dart';
import 'app/views/main_page.dart';
import 'core/rpc.dart';
import 'core/state.dart';

import 'error_page.dart';

final log = Logger('main');

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  // Either use the _YKMAN_EXE environment variable, or look relative to executable.
  var exe = Platform.environment['_YKMAN_PATH'];
  if (exe?.isEmpty ?? true) {
    var relativePath = 'ykman/ykman';
    if (Platform.isMacOS) {
      relativePath = '../Resources/' + relativePath;
    } else if (Platform.isWindows) {
      relativePath += '.exe';
    }
    exe = Uri.file(Platform.resolvedExecutable)
        .resolve(relativePath)
        .toFilePath();
  }

  Widget page;
  List<Override> overrides = [
    prefProvider.overrideWithValue(await SharedPreferences.getInstance())
  ];

  log.info('Starting subprocess: $exe');
  try {
    var rpc = await RpcSession.launch(exe!);
    // Enable logging TODO: Make this configurable
    _initLogging(Level.INFO, rpc);
    log.info('ykman process started', exe);
    overrides.add(rpcProvider.overrideWithValue(rpc));
    page = const MainPage();
  } catch (e) {
    log.warning('ykman process failed: $e');
    page = ErrorPage(error: e.toString());
  }

  runApp(ProviderScope(
    overrides: overrides,
    child: YubicoAuthenticatorApp(page: page),
  ));
}

void _initLogging(Level level, RpcSession rpc) {
  //TODO: Add support for logging to stderr and file
  Logger.root.onRecord.listen((record) {
    developer.log(
      '${record.level}: ${record.message}',
      error: record.error,
      name: record.loggerName,
      time: record.time,
      level: record.level.value,
    );
  });

  Logger.root.level = level;
  rpc.setLogLevel(level);
}

//TODO: Remove below this

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also a layout widget. It takes a list of children and
          // arranges them vertically. By default, it sizes itself to fit its
          // children horizontally, and tries to be as tall as its parent.
          //
          // Invoke "debug painting" (press "p" in the console, choose the
          // "Toggle Debug Paint" action from the Flutter Inspector in Android
          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
          // to see the wireframe for each widget.
          //
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headline4,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}