import 'package:flutter/material.dart';
import 'dart:async';
import 'package:provider/provider.dart';
import 'providers/expense_provider.dart';
import 'screens/home_screen.dart';
import 'package:flutter_unionad/flutter_unionad.dart';
void main() {
  WidgetsFlutterBinding.ensureInitialized();
  runApp(const MyApp());
}

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

  @override
  Widget build(BuildContext context) {
    return MultiProvider(
      providers: [
        ChangeNotifierProvider(create: (_) => ExpenseProvider()..loadData()),
      ],
      child: MaterialApp(
        title: 'Expense Tracker',
        theme: ThemeData(
          colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
          useMaterial3: true,
        ),
        home: const SplashPage(),
      ),
    );
  }
}

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

  @override
  State<SplashPage> createState() => _SplashPageState();
}

class _SplashPageState extends State<SplashPage> {
  bool _showAd = true;
  Timer? _adWatchdog;
  bool? _initSuccess; // null=loading, true=success, false=failure

  @override
  void initState() {
    super.initState();
    // 延后到首帧绘制后再初始化广告 SDK，避免在 Activity/Context 未就绪时调用导致 NPE
    WidgetsBinding.instance.addPostFrameCallback((_) {
      _initUnionAd();
    });
    // 如果广告或 SDK 未在合理时间内返回，使用回退跳转避免白屏
    _adWatchdog = Timer(const Duration(seconds: 6), () {
      if (mounted) _goToHome();
    });
  }

  Future<void> _initUnionAd() async {
    // 注册并初始化 FlutterUnionad SDK
    try {
      await FlutterUnionad.register(
        // 穿山甲广告 Android appid 必填
        androidAppId: "5779303",
        // 穿山甲广告 ios appid 必填
        iosAppId: "5779303",
        // appname 必填
        appName: "晴天记账",
        // 使用聚合功能（true 使用 GroMore 下的广告位）
        useMediation: false,
        // 是否为计费用户
        paid: false,
        // 用户画像关键词
        keywords: "",
        // 是否允许 SDK 展示通知栏提示
        allowShowNotify: true,
        // 是否显示 debug 日志
        debug: true,
        // 是否支持多进程
        supportMultiProcess: false,
        // 允许直接下载的网络状态集合
        directDownloadNetworkType: [
          FlutterUnionadNetCode.NETWORK_STATE_2G,
          FlutterUnionadNetCode.NETWORK_STATE_3G,
          FlutterUnionadNetCode.NETWORK_STATE_4G,
          FlutterUnionadNetCode.NETWORK_STATE_WIFI,
        ],
        androidPrivacy: AndroidPrivacy(
          isCanUseLocation: false,
          lat: 0.0,
          lon: 0.0,
          isCanUsePhoneState: false,
          imei: "",
          isCanUseWifiState: false,
          macAddress: "",
          isCanUseWriteExternal: false,
          oaid: "b69cd3cf68900323",
          alist: false,
          isCanUseAndroidId: false,
          androidId: "",
          isCanUsePermissionRecordAudio: false,
          isLimitPersonalAds: false,
          isProgrammaticRecommend: false,
          userPrivacyConfig: {"mcod": "0"},
        ),
        iosPrivacy: IOSPrivacy(
          limitPersonalAds: false,
          limitProgrammaticAds: false,
          forbiddenCAID: false,
        ),
        // userInfo: UnionadUserInfo(
        //   userId: "unionad_123",
        //   age: 19,
        //   gender: 2,
        //   channel: "flutter",
        //   subChannel: "flutter_unionad",
        //   userValueGroup: "QQ",
        //   customInfos: {"QQ": "123", "WeChat": "456"},
        // ),
        // localConfig: "site_config_5098580",
      );
      debugPrint('FlutterUnionad.register: success');
      if (mounted) setState(() => _initSuccess = true);
    } catch (e) {
      debugPrint('FlutterUnionad.register error: $e');
      if (mounted) setState(() => _initSuccess = false);
    }
    try {
      final sdkVersion = await FlutterUnionad.getSDKVersion();
      debugPrint('FlutterUnionad SDK Version: $sdkVersion');
    } catch (e) {
      debugPrint('getSDKVersion error: $e');
    }

    FlutterUnionad.requestPermissionIfNecessary(
      callBack: FlutterUnionadPermissionCallBack(
        notDetermined: () {
          debugPrint('权限未确定');
        },
        restricted: () {
          debugPrint('权限限制');
        },
        denied: () {
          debugPrint('权限拒绝');
        },
        authorized: () {
          debugPrint('权限同意');
        },
      ),
    );
    // 如果注册/初始化在合理时间内仍未完成，标记为失败以便调试
    Future.delayed(const Duration(seconds: 4), () {
      if (!mounted) return;
      if (_initSuccess == null) {
        debugPrint('FlutterUnionad: init did not finish within 4s, marking as failed');
        setState(() => _initSuccess = false);
      }
    });
  }

  void _goToHome() {
    if (!mounted) return;
    _adWatchdog?.cancel();
    Navigator.of(context).pushReplacement(
      MaterialPageRoute(builder: (_) => const HomeScreen()),
    );
  }

  @override
  void dispose() {
    _adWatchdog?.cancel();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Stack(
        children: [
          // 后端主页面作为备用
          const Offstage(offstage: true, child: HomeScreen()),
          // 开屏广告视图
          Positioned.fill(
            child: _showAd
                ? FlutterUnionadSplashAdView(
                    androidCodeId: "102729400",
                    iosCodeId: "102729400",
                    supportDeepLink: true,
                    width: MediaQuery.of(context).size.width,
                    height: MediaQuery.of(context).size.height,
                    hideSkip: false,
                    timeout: 3000,
                    callBack: FlutterUnionadSplashCallBack(
                      onShow: () {
                        debugPrint('开屏广告显示');
                        setState(() => _showAd = true);
                      },
                      onClick: () {
                        debugPrint('开屏广告点击');
                      },
                      onFail: (error) {
                        debugPrint('开屏广告失败 $error');
                        _goToHome();
                      },
                      onFinish: () {
                        debugPrint('开屏广告倒计时结束');
                        _goToHome();
                      },
                      onSkip: () {
                        debugPrint('开屏广告跳过');
                        _goToHome();
                      },
                      onTimeOut: () {
                        debugPrint('开屏广告超时');
                        _goToHome();
                      },
                    ),
                  )
                : const SizedBox.shrink(),
          ),
              // Debug: init 状态可视化，方便在真机上观察
              Positioned(
                left: 12,
                right: 12,
                bottom: 24,
                child: Align(
                  alignment: Alignment.bottomCenter,
                  child: Container(
                    padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
                    decoration: BoxDecoration(
                      color: Colors.black.withOpacity(0.6),
                      borderRadius: BorderRadius.circular(8),
                    ),
                    child: Text(
                      _initSuccess == null
                          ? 'SDK init: loading...'
                          : (_initSuccess == true ? 'SDK init: success' : 'SDK init: failed'),
                      style: const TextStyle(color: Colors.white),
                    ),
                  ),
                ),
              ),
        ],
      ),
    );
  }
}