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

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        decoration: BoxDecoration(
          gradient: LinearGradient(
            begin: Alignment.topCenter,
            end: Alignment.bottomCenter,
            colors: [
              Colors.blue.shade400,
              Colors.blue.shade700,
            ],
          ),
        ),
        child: SafeArea(
          child: Center(
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                // 图标
                Icon(
                  Icons.camera_alt,
                  size: 100,
                  color: Colors.white,
                ),
                const SizedBox(height: 30),
                
                // 标题
                const Text(
                  '自动拍照应用',
                  style: TextStyle(
                    fontSize: 32,
                    fontWeight: FontWeight.bold,
                    color: Colors.white,
                  ),
                ),
                const SizedBox(height: 20),
                
                // 说明文字
                Padding(
                  padding: const EdgeInsets.symmetric(horizontal: 40),
                  child: Text(
                    '点击按钮开始自动拍照\n每2秒拍摄一次，共拍摄5张照片',
                    textAlign: TextAlign.center,
                    style: TextStyle(
                      fontSize: 16,
                      color: Colors.white.withOpacity(0.9),
                      height: 1.5,
                    ),
                  ),
                ),
                const SizedBox(height: 60),
                
                // 开始按钮
                ElevatedButton(
                  onPressed: () {
                    Navigator.push(
                      context,
                      MaterialPageRoute(
                        builder: (context) => const CameraScreen(),
                      ),
                    );
                  },
                  style: ElevatedButton.styleFrom(
                    backgroundColor: Colors.white,
                    foregroundColor: Colors.blue.shade700,
                    padding: const EdgeInsets.symmetric(
                      horizontal: 50,
                      vertical: 18,
                    ),
                    shape: RoundedRectangleBorder(
                      borderRadius: BorderRadius.circular(30),
                    ),
                    elevation: 5,
                  ),
                  child: const Text(
                    '开始拍照',
                    style: TextStyle(
                      fontSize: 20,
                      fontWeight: FontWeight.bold,
                    ),
                  ),
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}