import 'package:flutter/material.dart';
import 'screens/camera_screen.dart';

void main() {
  runApp(const MyApp());
}

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'AISee Camera',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.blue),
        useMaterial3: true,
      ),
      home: const HomeScreen(),
      debugShowCheckedModeBanner: false,
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('AISee'),
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            const Icon(
              Icons.visibility,
              size: 100,
              color: Colors.blue,
            ),
            const SizedBox(height: 24),
            const Text(
              'AISee 视觉辅助',
              style: TextStyle(
                fontSize: 28,
                fontWeight: FontWeight.bold,
              ),
            ),
            const SizedBox(height: 8),
            const Text(
              '实时相机图像传输演示',
              style: TextStyle(
                fontSize: 16,
                color: Colors.grey,
              ),
            ),
            const SizedBox(height: 48),
            ElevatedButton.icon(
              onPressed: () {
                Navigator.push(
                  context,
                  MaterialPageRoute(
                    builder: (context) => const CameraScreen(),
                  ),
                );
              },
              icon: const Icon(Icons.camera_alt, size: 28),
              label: const Text(
                '打开相机',
                style: TextStyle(fontSize: 18),
              ),
              style: ElevatedButton.styleFrom(
                padding: const EdgeInsets.symmetric(
                  horizontal: 32,
                  vertical: 16,
                ),
              ),
            ),
            const SizedBox(height: 24),
            const Padding(
              padding: EdgeInsets.symmetric(horizontal: 32),
              child: Text(
                '功能说明：\n'
                '• 拍照分析：拍摄单张照片并上传分析\n'
                '• 开始传输：每 500ms 自动捕获并上传\n'
                '• 切换：切换前后摄像头',
                textAlign: TextAlign.left,
                style: TextStyle(
                  fontSize: 14,
                  color: Colors.black87,
                  height: 1.5,
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }
}