import 'package:app_upgrade_plugin/app_upgrade_simple.dart';
import 'package:flutter/material.dart';

/// 最简单的使用示例
/// 展示如何用最少的代码实现App升级功能
void main() {
  runApp(const MyApp());
}

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'App Upgrade Simple Example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key});

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

class _MyHomePageState extends State<MyHomePage> {
  // 模拟的更新检查URL（实际使用时替换为真实的API地址）
  static const String checkUpdateUrl = 'https://api.example.com/check-update';

  @override
  void initState() {
    super.initState();

    // 可选：启动时自动检查更新（静默检查）
    _checkUpdateOnStart();
  }

  /// 启动时静默检查更新
  void _checkUpdateOnStart() async {
    // 延迟2秒，避免启动时界面还未完全加载
    await Future.delayed(const Duration(seconds: 2));

    if (mounted) {
      // 静默检查，有更新才显示对话框
      final info = await AppUpgradeSimple.instance.checkUpdateSilent(
        url: checkUpdateUrl,
      );

      if (info != null && mounted) {
        // 有更新时显示对话框
        AppUpgradeSimple.instance.checkUpdate(
          context: context,
          url: checkUpdateUrl,
          showNoUpdateToast: false, // 不显示"已是最新版本"提示
          autoDownload: false, // 不自动下载，让用户选择
        );
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('App升级 - 极简示例'),
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            const Icon(
              Icons.rocket_launch,
              size: 80,
              color: Colors.blue,
            ),
            const SizedBox(height: 24),
            const Text(
              '最简单的App升级实现',
              style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
            ),
            const SizedBox(height: 8),
            const Text(
              '一行代码搞定升级功能',
              style: TextStyle(fontSize: 16, color: Colors.grey),
            ),
            const SizedBox(height: 48),

            // 示例1：最简单的使用方式（一行代码）
            ElevatedButton.icon(
              onPressed: () {
                // 🚀 一行代码检查更新！
                AppUpgradeSimple.instance.checkUpdate(
                  context: context,
                  url: checkUpdateUrl,
                );
              },
              icon: const Icon(Icons.flash_on),
              label: const Text('一键检查更新（最简单）'),
              style: ElevatedButton.styleFrom(
                padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 12),
              ),
            ),

            const SizedBox(height: 16),

            const SizedBox(height: 16),

            const SizedBox(height: 48),

            // 使用说明
            Container(
              margin: const EdgeInsets.symmetric(horizontal: 32),
              padding: const EdgeInsets.all(16),
              decoration: BoxDecoration(
                color: Colors.blue.shade50,
                borderRadius: BorderRadius.circular(12),
                border: Border.all(color: Colors.blue.shade200),
              ),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: const [
                  Text(
                    '💡 使用提示',
                    style: TextStyle(
                      fontSize: 16,
                      fontWeight: FontWeight.bold,
                      color: Colors.blue,
                    ),
                  ),
                  SizedBox(height: 8),
                  Text('1. 替换 checkUpdateUrl 为您的API地址'),
                  Text('2. API返回格式请参考文档'),
                  Text('3. Android需要配置权限和FileProvider'),
                  Text('4. iOS需要配置App Store地址'),
                ],
              ),
            ),
          ],
        ),
      ),
    );
  }
}

/// API返回格式示例：
/// ```json
/// {
///   "hasUpdate": true,
///   "isForceUpdate": false,
///   "versionCode": "2",
///   "versionName": "1.1.0",
///   "updateContent": "1. 修复已知问题\n2. 优化用户体验",
///   "downloadUrl": "https://example.com/app-v1.1.0.apk",  // Android
///   "appStoreUrl": "https://apps.apple.com/app/id123456",  // iOS
///   "apkSize": 26214400,
///   "apkMd5": "abc123def456"
/// }
/// ```