import 'package:flutter/material.dart';
import 'package:flutter/foundation.dart' show kIsWeb;
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:intl/date_symbol_data_local.dart';
import 'screens/home_screen.dart';
import 'screens/permission_screen.dart';
import 'theme/app_theme.dart';
import 'providers/time_tracking_provider.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  
  // 初始化日期格式化本地化数据
  await initializeDateFormatting('zh_CN', null);
  
  runApp(
    const ProviderScope(
      child: AutoTimeTrackerApp(),
    ),
  );
}

class AutoTimeTrackerApp extends StatelessWidget {
  const AutoTimeTrackerApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'AutoTime Tracker',
      debugShowCheckedModeBanner: false,
      theme: AppTheme.lightTheme,
      darkTheme: AppTheme.darkTheme,
      themeMode: ThemeMode.system,
      home: const PermissionCheckScreen(),
    );
  }
}

/// 权限检查屏幕 - 检查权限后决定显示哪个页面
class PermissionCheckScreen extends ConsumerWidget {
  const PermissionCheckScreen({super.key});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    // Web 平台直接显示主界面（使用测试数据）
    if (kIsWeb) {
      return const HomeScreen();
    }

    final permissionStatus = ref.watch(permissionStatusProvider);

    return permissionStatus.when(
      data: (hasPermission) {
        if (hasPermission) {
          return const HomeScreen();
        } else {
          return const PermissionScreen();
        }
      },
      loading: () => const Scaffold(
        body: Center(child: CircularProgressIndicator()),
      ),
      error: (error, stack) => Scaffold(
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              const Icon(Icons.error_outline, size: 48, color: Colors.red),
              const SizedBox(height: 16),
              Text('检查权限时出错: $error'),
              const SizedBox(height: 16),
              ElevatedButton(
                onPressed: () {
                  ref.invalidate(permissionStatusProvider);
                },
                child: const Text('重试'),
              ),
            ],
          ),
        ),
      ),
    );
  }
}