// Learn cc.Class:
//  - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/class.html
//  - [English] http://docs.cocos2d-x.org/creator/manual/en/scripting/class.html
// Learn Attribute:
//  - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/reference/attributes.html
//  - [English] http://docs.cocos2d-x.org/creator/manual/en/scripting/reference/attributes.html
// Learn life-cycle callbacks:
//  - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/life-cycle-callbacks.html
//  - [English] https://www.cocos2d-x.org/docs/creator/manual/en/scripting/life-cycle-callbacks.html

var clsObserver = function(target,cb){
    this.target = target
    this.callback = cb
}

var Notifier = function(){
    this.observerMap={}
}

Notifier.prototype.on = function(name,target,callback) {
     if (!this.observerMap[name]){
        this.observerMap[name]=[]
     }
    this.observerMap[name].push(new clsObserver(target,callback))
};
Notifier.prototype.off = function(name,target) {
    if (this.observerMap[name] ){
        var list=this.observerMap[name]
        for(var i = list.length-1;i>=0;i--){
            if(list[i].target == target){
                list.splice(i, 1);
                break
            }
        }

    }
};

Notifier.prototype.cleankey = function(name) {
    if (this.observerMap[name] ){
        this.observerMap[name].length = 0

    }
};

Notifier.prototype.removeAllObservers = function(name,arr) {
     this.observerMap[name] = null
};
Notifier.prototype.emit = function(name,parma) {
       if (this.observerMap[name] ){
        var list=this.observerMap[name]
        for(var i = list.length-1;i>=0;i--){
           list[i].callback(parma)
        }
    }
     
};

cc.Notifier = new Notifier();