// Author: fengshengxiong
// Date: 2024/6/25
// Description: 插页广告

import 'package:connectivity_plus/connectivity_plus.dart';
import 'package:get/get.dart';
import 'package:google_mobile_ads/google_mobile_ads.dart';
import 'package:tone_snap/data/enum/ad_scenes.dart';
import 'package:tone_snap/data/models/ad_config_model.dart';
import 'package:tone_snap/data/storage/music_box.dart';
import 'package:tone_snap/firebase/firebase_analytics_manager.dart';
import 'package:tone_snap/modules/launch/launch_controller.dart';
import 'package:tone_snap/modules/sideb/controllers/music_player_controller.dart';
import 'package:tone_snap/utils/log_util.dart';
import 'package:tone_snap/utils/obj_util.dart';

class InterstitialAdManager {
  InterstitialAdManager._();

  static final InterstitialAdManager _instance = InterstitialAdManager._();

  factory InterstitialAdManager() => _instance;

  /// 广告对象Map
  final Map<String, InterstitialAd?> _interstitialAdMap = {};

  /// 加载和显示广告之间允许的最长持续时间
  final Duration _maxCacheDuration = const Duration(minutes: 50);

  /// 跟踪加载时间，这样我们就不会显示过期的广告
  final Map<String, DateTime?> _appOpenLoadTimeMap = {};

  /// 记录关闭时的时间，用于下一次展示时计算时间差
  DateTime? _closeDateTime;

  /// 是否显示
  bool isShowingAd = false;

  /// 广告显示前的，音乐是否在播放
  bool showAdFrontIsPlaying = false;

  /// 加载所有插页广告位
  void loadAdAll() {
    AdConfigModel adConfigModel = MusicBox().getAdConfig();
    _loadSingleAd(adConfigModel.coldLoading, AdScenes.coldLoading.name);
    _loadSingleAd(adConfigModel.hotLoading, AdScenes.hotLoading.name);
    _loadSingleAd(adConfigModel.play, AdScenes.play.name);
    _loadSingleAd(adConfigModel.download, AdScenes.download.name);
    _loadSingleAd(adConfigModel.list, AdScenes.list.name);
    _loadSingleAd(adConfigModel.playCut, AdScenes.playCut.name);
    _loadSingleAd(adConfigModel.search, AdScenes.search.name);
  }

  /// 加载单个广告位
  void _loadSingleAd(List<AdModel>? adList, String adScenes) {
    if (adList != null && adList.isNotEmpty) {
      var adModel = adList.reduce((value, element) => element.level! < value.level! ? element : value);
      loadAd(adModel.identifier, adScenes);
    }
  }

  /// 加载广告
  void loadAd(String? adUnitId, String adScenes) async {
    final List<ConnectivityResult> connectivityResult = await (Connectivity().checkConnectivity());
    if (connectivityResult.contains(ConnectivityResult.none)) {
      LogUtil.d('当前无网络，不加载广告');
      return;
    }
    if (ObjUtil.isEmpty(adUnitId)) {
      return;
    }
    InterstitialAd.load(
      adUnitId: adUnitId!,
      request: const AdRequest(),
      adLoadCallback: InterstitialAdLoadCallback(
        onAdLoaded: (ad) {
          LogUtil.d('$adScenes:${ad.adUnitId}插页广告加载完成');
          _interstitialAdMap[adScenes] = ad;
          _appOpenLoadTimeMap[adScenes] = DateTime.now();
          if (adScenes == AdScenes.coldLoading.name) {
            if (Get.isRegistered<LaunchController>()) {
              LaunchController.to.editChangeValue();
            }
          }
        },
        onAdFailedToLoad: (LoadAdError error) {
          LogUtil.d('$adScenes:$adUnitId插页广告加载失败: $error');
          _loadFailHandle(adUnitId, adScenes);
          FirebaseAnalyticsManager.logPlayAdsLoadFailure(error.message);
        },
      ),
    );
  }

  /// 加载失败处理
  void _loadFailHandle(String adUnitId, String adScenes) {
    int interval = 0;
    if (adScenes != AdScenes.coldLoading.name && adScenes != AdScenes.hotLoading.name) {
      interval = 15;
    }
    Future.delayed(Duration(seconds: interval), () {
      AdConfigModel adConfigModel = MusicBox().getAdConfig();
      var adList = _getAdList(adScenes);
      if (adList != null) {
        var currentItem = adList.firstWhereOrNull((e) => e.identifier == adUnitId);
        if (currentItem != null) {
          var nextItem = adList.firstWhereOrNull((e) => e.level == currentItem.level! + 1);
          if (nextItem != null) {
            // 当前id加载失败，加载下一个id
            loadAd(nextItem.identifier, adScenes);
          } else {
            // 对应场景id都加载失败，加载全局id
            _loadSingleAd(adConfigModel.backup, adScenes);
          }
        } else {
          var currentItem = adConfigModel.backup?.firstWhereOrNull((e) => e.identifier == adUnitId);
          if (currentItem != null) {
            var nextItem = adConfigModel.backup?.firstWhereOrNull((e) => e.level == currentItem.level! + 1);
            if (nextItem != null) {
              loadAd(nextItem.identifier, adScenes);
            } else {
              if (adList.isNotEmpty) {
                _loadSingleAd(adList, adScenes);
              }
            }
          }
        }
      }
    });
  }

  List<AdModel>? _getAdList(String adScenes) {
    AdConfigModel adConfigModel = MusicBox().getAdConfig();
      if (adScenes == AdScenes.coldLoading.name) {
      return adConfigModel.coldLoading;
    } else if (adScenes == AdScenes.hotLoading.name) {
      return adConfigModel.hotLoading;
    } else if (adScenes == AdScenes.play.name) {
      return adConfigModel.play;
    } else if (adScenes == AdScenes.download.name) {
      return adConfigModel.download;
    } else if (adScenes == AdScenes.list.name) {
      return adConfigModel.list;
    } else if (adScenes == AdScenes.playCut.name) {
      return adConfigModel.playCut;
    } else if (adScenes == AdScenes.search.name) {
      return adConfigModel.search;
    } else if (adScenes == AdScenes.backup.name) {
      return adConfigModel.backup;
    }
    return null;
  }

  /// 是否可以播放广告
  bool isAdAvailable(String adScenes) {
    return _interstitialAdMap[adScenes] != null;
  }

  /// 显示广告（如果存在且尚未显示）
  /// 如果先前缓存的广告已过期，则只加载并缓存新广告
  void showAdIfAvailable(String adScenes, {Function()? onTap}) {
    if (!isAdAvailable(adScenes)) {
      LogUtil.d('尝试在可用之前显示广告');

      if(onTap != null) onTap();
      return;
    }
    if (isShowingAd) {
      LogUtil.d('尝试在已显示广告的情况下显示广告');

      if(onTap != null) onTap();
      return;
    }
    if (DateTime.now().subtract(_maxCacheDuration).isAfter(_appOpenLoadTimeMap[adScenes]!)) {
      LogUtil.d('超过了最大缓存持续时间。正在加载另一个广告');
      _interstitialAdMap[adScenes]!.dispose();
      loadAd(_interstitialAdMap[adScenes]?.adUnitId, adScenes);
      _interstitialAdMap[adScenes] = null;
      _interstitialAdMap.remove(adScenes);

      if(onTap != null) onTap();
      return;
    }
    if (_closeDateTime != null) {
      // 计算时间差
      Duration timeDifference = DateTime.now().difference(_closeDateTime!);

      int seconds;
      if (adScenes == AdScenes.hotLoading.name) {
        seconds = MusicBox().getOpenAppEventDuration();
      } else {
        seconds = MusicBox().getInterstitialEventDuration();
      }
      if (timeDifference < Duration(seconds: seconds)) {
        LogUtil.d('距离上次广告展示未达到插页广告事件间隔时长');

        if(onTap != null) onTap();
        return;
      }
    }

    FirebaseAnalyticsManager.logPlayAdsChanceAction();

    // 设置 fullScreenContentCallback 并显示广告
    _interstitialAdMap[adScenes]!.fullScreenContentCallback = FullScreenContentCallback(
      // 暂停应用程序中的活动或记录广告展示的时间
      onAdShowedFullScreenContent: (ad) {
        LogUtil.d('$ad onAdShowedFullScreenContent');
        isShowingAd = true;

        showAdFrontIsPlaying = MusicPlayerController.to.isPlaying.value;
        if (showAdFrontIsPlaying) {
          MusicPlayerController.to.pause();
        }
      },
      // 更适合用于跟踪广告展示的次数和效果，以及执行与广告展示相关的操作
      onAdImpression: (ad) {
        LogUtil.d('$ad onAdImpression');
        FirebaseAnalyticsManager.logPlayAdsShowSuccess(ad);
      },
      onAdFailedToShowFullScreenContent: (ad, error) {
        LogUtil.d('$ad onAdFailedToShowFullScreenContent: $error');
        isShowingAd = false;
        ad.dispose();
        loadAd(_interstitialAdMap[adScenes]?.adUnitId, adScenes);
        _interstitialAdMap[adScenes] = null;
        _interstitialAdMap.remove(adScenes);
        FirebaseAnalyticsManager.logPlayAdsLoadFailure(error.message);

        if(onTap != null) onTap();
      },
      onAdDismissedFullScreenContent: (ad) {
        LogUtil.d('$ad onAdDismissedFullScreenContent');
        isShowingAd = false;
        if (showAdFrontIsPlaying) {
          MusicPlayerController.to.play();
        }
        _closeDateTime = DateTime.now();
        ad.dispose();

        int interval = 0;
        if (adScenes != AdScenes.coldLoading.name && adScenes != AdScenes.hotLoading.name) {
          interval = 15;
        }
        Future.delayed(Duration(seconds: interval), () {
          loadAd(_interstitialAdMap[adScenes]?.adUnitId, adScenes);
          _interstitialAdMap[adScenes] = null;
          _interstitialAdMap.remove(adScenes);
        });

        if(onTap != null) onTap();
      },
      onAdClicked: (ad) {
        LogUtil.d('$ad onAdClicked');
      },
    );
    _interstitialAdMap[adScenes]!.show();
  }
}