#include "RUBehaviacTreeManger.h"

NS_RU_BEGIN

static RUBehaviacTreeManger* _instance = nullptr;
const static std::string RUBEHAVIACTREEMANGER_SCHEDULER_KEY = "RUBEHAVIACTREEMANGER_SCHEDULER_KEY";

RUBehaviacTreeManger* RUBehaviacTreeManger::getInstance()
{
    if(_instance == nullptr)
    {
        _instance = new RUBehaviacTreeManger();
        _instance->_startUpdate();
    }
    return _instance;
}

void RUBehaviacTreeManger::destroyInstance() {
    if(_instance != nullptr)
    {
        Director::getInstance()->getScheduler()->unschedule(RUBEHAVIACTREEMANGER_SCHEDULER_KEY, _instance);
        delete _instance;
    }
    _instance = nullptr;
}

void RUBehaviacTreeManger::_startUpdate() {
    Director::getInstance()->getScheduler()->schedule(CC_CALLBACK_1(RUBehaviacTreeManger::_update, this), this, 0, false, RUBEHAVIACTREEMANGER_SCHEDULER_KEY);
}

void RUBehaviacTreeManger::_addBehaviacTree(RUBehaviacTree* tree) {
    _addBehaviorTrees.insert(tree);
}

void RUBehaviacTreeManger::_removeBehaviacTree(RUBehaviacTree* tree) {
    _removeBehaviorTrees.insert(tree);
}

void RUBehaviacTreeManger::_update(float dt) {
    _runningBehaviorTrees.insert(_addBehaviorTrees.begin(), _addBehaviorTrees.end());
    _addBehaviorTrees.clear();
    
    //遍历的过程中可能会addBehaviacTree或removeBehaviacTree
    for (auto iter = _runningBehaviorTrees.begin(); iter != _runningBehaviorTrees.end();iter++) {
        (*iter)->_update();
    }
    
    for (const auto &elem : _removeBehaviorTrees) {
        _runningBehaviorTrees.erase(elem);
    }
    _removeBehaviorTrees.clear();
}

NS_RU_END