import 'dart:collection';

import 'package:flutter/cupertino.dart';

import 'package:yumi/ui_kit/widgets/room/anim/l_gift_animal_view.dart';

class GiftAnimationManager extends ChangeNotifier {
  static const int _maxPendingAnimations = 24;

  Queue<LGiftModel> pendingAnimationsQueue = Queue<LGiftModel>();
  List<LGiftScrollingScreenAnimsBean> animationControllerList = [];

  //每个控件正在播放的动画
  Map<int, LGiftModel?> giftMap = {0: null, 1: null, 2: null, 3: null};

  bool get _controllersReady =>
      animationControllerList.length >= giftMap.length;

  void enqueueGiftAnimation(LGiftModel giftModel) {
    if (_mergeIntoActiveAnimation(giftModel)) {
      return;
    }
    if (_mergeIntoPendingAnimation(giftModel)) {
      return;
    }
    _trimPendingAnimations();
    pendingAnimationsQueue.add(giftModel);
    proceedToNextAnimation();
  }

  void _trimPendingAnimations() {
    while (pendingAnimationsQueue.length >= _maxPendingAnimations) {
      pendingAnimationsQueue.removeFirst();
    }
  }

  bool _mergeIntoActiveAnimation(LGiftModel incoming) {
    for (final entry in giftMap.entries) {
      final current = entry.value;
      if (current == null || current.labelId != incoming.labelId) {
        continue;
      }
      _mergeGiftModel(target: current, incoming: incoming);
      notifyListeners();
      if (animationControllerList.length > entry.key) {
        animationControllerList[entry.key].controller.forward(from: 0.45);
      }
      return true;
    }
    return false;
  }

  bool _mergeIntoPendingAnimation(LGiftModel incoming) {
    for (final pending in pendingAnimationsQueue) {
      if (pending.labelId != incoming.labelId) {
        continue;
      }
      _mergeGiftModel(target: pending, incoming: incoming);
      return true;
    }
    return false;
  }

  void _mergeGiftModel({
    required LGiftModel target,
    required LGiftModel incoming,
  }) {
    target.giftCount = (target.giftCount) + (incoming.giftCount);
    if (target.sendUserName.isEmpty) {
      target.sendUserName = incoming.sendUserName;
    }
    if (target.sendToUserName.isEmpty) {
      target.sendToUserName = incoming.sendToUserName;
    }
    if (target.sendUserPic.isEmpty) {
      target.sendUserPic = incoming.sendUserPic;
    }
    if (target.giftPic.isEmpty) {
      target.giftPic = incoming.giftPic;
    }
    if (target.giftName.isEmpty) {
      target.giftName = incoming.giftName;
    }
    target.rewardAmount = target.rewardAmount + incoming.rewardAmount;
    if (incoming.rewardAmountText.isNotEmpty) {
      target.rewardAmountText = incoming.rewardAmountText;
    }
    target.showLuckyRewardFrame =
        target.showLuckyRewardFrame || incoming.showLuckyRewardFrame;
  }

  ///开始播放
  proceedToNextAnimation() {
    if (pendingAnimationsQueue.isEmpty || !_controllersReady) {
      return;
    }
    var playGift = pendingAnimationsQueue.first;
    for (var key in giftMap.keys) {
      var value = giftMap[key];
      if (value == null) {
        giftMap[key] = playGift;
        pendingAnimationsQueue.removeFirst();
        notifyListeners();
        animationControllerList[key].controller.forward(from: 0);
        break;
      } else {
        if (value.labelId == playGift.labelId) {
          _mergeGiftModel(target: value, incoming: playGift);
          pendingAnimationsQueue.removeFirst();
          notifyListeners();
          animationControllerList[key].controller.forward(from: 0.45);
          break;
        }
      }
    }
  }

  void attachAnimationControllers(List<LGiftScrollingScreenAnimsBean> anins) {
    animationControllerList = anins;
    proceedToNextAnimation();
  }

  void cleanupAnimationResources() {
    pendingAnimationsQueue.clear();
    giftMap[0] = null;
    giftMap[1] = null;
    giftMap[2] = null;
    giftMap[3] = null;
    for (var element in animationControllerList) {
      element.controller.dispose();
    }
    animationControllerList.clear();
  }

  void markAnimationAsFinished(int index) {
    giftMap[index] = null;
    notifyListeners();
    proceedToNextAnimation();
  }
}