import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import '../config/app_config.dart';
import '../routes/app_routes.dart';
import 'screen_adapter.dart';
import 'force_guide_checker.dart';

class AppInitializer {
  static const bool _isDebugMode =
      bool.fromEnvironment('dart.vm.product') == false;

  static void _log(String message) {
    if (_isDebugMode) {
      debugPrint(message);
    }
  }

  static Future<InitializationResult> initialize() async {
    _log('========================================');
    _log('======== 应用启动 - 强制引导页 ========');
    _log('========================================');

    final prefs = await SharedPreferences.getInstance();

    await _handleVersionCheck(prefs);
    _logConfigState(prefs);

    final guideCheckResult = await _checkGuideStatus(prefs);

    _setupScreenAdapter();

    final initialRoute = await _getInitialRoute(prefs);

    return InitializationResult(
      prefs: prefs,
      guideCheckResult: guideCheckResult,
      initialRoute: initialRoute,
    );
  }

  static Future<void> _handleVersionCheck(SharedPreferences prefs) async {
    final savedVersion = prefs.getInt(AppConfig.keyAppVersion);
    _log('保存的版本号: $savedVersion');

    final bool isFirstInstall =
        savedVersion == null || savedVersion != AppConfig.appVersionCode;
    _log('是否首次安装/升级: $isFirstInstall');

    if (isFirstInstall) {
      _log('--- 首次安装/升级，清空所有配置 ---');
      await prefs.clear();

      await Future.wait([
        prefs.setBool(AppConfig.keyFirstLaunch, true),
        prefs.setBool(AppConfig.keyAgreementAccepted, false),
        prefs.setBool(AppConfig.keyShowGuideOnStartup, false),
        prefs.setInt(AppConfig.keyAppVersion, AppConfig.appVersionCode),
      ]);

      _log('已设置 firstLaunch=true');
      _log('已设置 agreementAccepted=false');
      _log('已设置 showGuideOnStartup=false');
      _log('已设置 appVersion=${AppConfig.appVersionCode}');
    }
  }

  static void _logConfigState(SharedPreferences prefs) {
    _log('--- 验证配置 ---');
    _log('firstLaunch: ${prefs.getBool(AppConfig.keyFirstLaunch) ?? true}');
    _log(
      'agreementAccepted: ${prefs.getBool(AppConfig.keyAgreementAccepted) ?? false}',
    );
    _log('appVersion: ${prefs.getInt(AppConfig.keyAppVersion)}');
    _log('所有配置项: ${prefs.getKeys()}');
  }

  static Future<GuideCheckResult?> _checkGuideStatus(
    SharedPreferences prefs,
  ) async {
    try {
      final result = await ForceGuideChecker.checkAndValidate(prefs);
      _log('引导页检查结果: ${result.needGuide ? "需要引导页" : "不需要引导页"}');
      _log('原因: ${result.reason}');
      return result;
    } catch (e) {
      _log('引导页检查异常: $e');
      return null;
    }
  }

  static void _setupScreenAdapter() {
    ScreenAdapter.setPreferredOrientations();
    ScreenAdapter.enableSystemUIOverlay();
    ScreenAdapter.setSystemUIOverlayStyle(statusBarColor: Colors.transparent);
  }

  static Future<String> _getInitialRoute(SharedPreferences prefs) async {
    return AppRoutes.getInitialRoute(prefs);
  }
}

class InitializationResult {
  final SharedPreferences prefs;
  final GuideCheckResult? guideCheckResult;
  final String initialRoute;

  const InitializationResult({
    required this.prefs,
    required this.guideCheckResult,
    required this.initialRoute,
  });
}