import 'dart:async';
import 'package:background_downloader/background_downloader.dart';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'controllers/session_controller.dart';
import 'controllers/upload_controller.dart';
import 'core/app_theme.dart';
import 'screens/drive_screen.dart';
import 'screens/login_screen.dart';
import 'screens/splash_screen.dart';
import 'services/api_client.dart';
import 'services/token_store.dart';

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  const tokens = TokenStore();
  final api = ApiClient(tokens);
  runApp(WhatsDriveApp(tokens: tokens, api: api));
  unawaited(_initializeBackgroundUploads());
}

Future<void> _initializeBackgroundUploads() async {
  try {
    await FileDownloader().configure(
      globalConfig: [(Config.requestTimeout, const Duration(minutes: 30))],
    );
    FileDownloader().configureNotificationForGroup(
      'uploads',
      running: const TaskNotification(
        'Uploading {displayName}',
        '{progress} • {networkSpeed} • {timeRemaining} remaining',
      ),
      complete: const TaskNotification(
        'Upload complete',
        '{displayName} is now in your drive',
      ),
      error: const TaskNotification(
        'Upload failed',
        'Could not upload {displayName}',
      ),
      canceled: const TaskNotification(
        'Upload canceled',
        '{displayName} was canceled',
      ),
      progressBar: true,
    );
    await FileDownloader().start();
  } catch (error, stackTrace) {
    debugPrint('Background upload initialization failed: $error\n$stackTrace');
  }
}

class WhatsDriveApp extends StatelessWidget {
  const WhatsDriveApp({super.key, required this.tokens, required this.api});
  final TokenStore tokens;
  final ApiClient api;

  @override
  Widget build(BuildContext context) {
    return MultiProvider(
      providers: [
        ChangeNotifierProvider(
          create: (_) => SessionController(api, tokens)..initialize(),
        ),
        ChangeNotifierProvider(create: (_) => UploadController(tokens)),
        Provider.value(value: api),
      ],
      child: MaterialApp(
        debugShowCheckedModeBanner: false,
        title: 'Metatron-Drive',
        theme: AppTheme.light,
        home: Consumer<SessionController>(
          builder: (context, session, _) => switch (session.status) {
            SessionStatus.loading => const SplashScreen(),
            SessionStatus.signedOut => const LoginScreen(),
            SessionStatus.signedIn => DriveScreen(
              key: ValueKey(session.organizationId),
            ),
          },
        ),
      ),
    );
  }
}