function RepeaterModifier(){}
extendPrototype([ShapeModifier], RepeaterModifier);

RepeaterModifier.prototype.initModifierProperties = function(elem,data){
    this.getValue = this.processKeys;
    this.c = PropertyFactory.getProp(elem,data.c,0,null,this);
    this.o = PropertyFactory.getProp(elem,data.o,0,null,this);
    this.tr = TransformPropertyFactory.getTransformProperty(elem,data.tr,this);
    this.data = data;
    if(!this.dynamicProperties.length){
        this.getValue(true);
    }
    this._isAnimated = !!this.dynamicProperties.length;
    this.pMatrix = new Matrix();
    this.rMatrix = new Matrix();
    this.sMatrix = new Matrix();
    this.tMatrix = new Matrix();
    this.matrix = new Matrix();
};

RepeaterModifier.prototype.applyTransforms = function(pMatrix, rMatrix, sMatrix, transform, perc, inv){
    var dir = inv ? -1 : 1;
    var scaleX = transform.s.v[0] + (1 - transform.s.v[0]) * (1 - perc);
    var scaleY = transform.s.v[1] + (1 - transform.s.v[1]) * (1 - perc);
    pMatrix.translate(transform.p.v[0] * dir * perc, transform.p.v[1] * dir * perc, transform.p.v[2]);
    rMatrix.translate(-transform.a.v[0], -transform.a.v[1], transform.a.v[2]);
    rMatrix.rotate(-transform.r.v * dir * perc);
    rMatrix.translate(transform.a.v[0], transform.a.v[1], transform.a.v[2]);
    sMatrix.translate(-transform.a.v[0], -transform.a.v[1], transform.a.v[2]);
    sMatrix.scale(inv ? 1/scaleX : scaleX, inv ? 1/scaleY : scaleY);
    sMatrix.translate(transform.a.v[0], transform.a.v[1], transform.a.v[2]);
};

RepeaterModifier.prototype.init = function(elem, arr, pos, elemsData) {
    this.elem = elem;
    this.arr = arr;
    this.pos = pos;
    this.elemsData = elemsData;
    this._currentCopies = 0;
    this._elements = [];
    this._groups = [];
    this.frameId = -1;
    this.initDynamicPropertyContainer(elem);
    this.initModifierProperties(elem,arr[pos]);
    var cont = 0;
    while(pos>0){
        pos -= 1;
        //this._elements.unshift(arr.splice(pos,1)[0]);
        this._elements.unshift(arr[pos]);
        cont += 1;
    }
    if(this.dynamicProperties.length){
        this.k = true;
    }else{
        this.getValue(true);
    }
};

RepeaterModifier.prototype.resetElements = function(elements){
    var i, len = elements.length;
    for(i = 0; i < len; i += 1) {
        elements[i]._processed = false;
        if(elements[i].ty === 'gr'){
            this.resetElements(elements[i].it);
        }
    }
};

RepeaterModifier.prototype.cloneElements = function(elements){
    var i, len = elements.length;
    var newElements = JSON.parse(JSON.stringify(elements));
    this.resetElements(newElements);
    return newElements;
};

RepeaterModifier.prototype.changeGroupRender = function(elements, renderFlag) {
    var i, len = elements.length;
    for(i = 0; i < len ; i += 1) {
        elements[i]._render = renderFlag;
        if(elements[i].ty === 'gr') {
            this.changeGroupRender(elements[i].it, renderFlag);
        }
    }
};

RepeaterModifier.prototype.processShapes = function(_isFirstFrame) {
    var items, itemsTransform, i, dir, cont;
    if(this._mdf || _isFirstFrame){
        var copies = Math.ceil(this.c.v);
        if(this._groups.length < copies){
            while(this._groups.length < copies){
                var group = {
                    it:this.cloneElements(this._elements),
                    ty:'gr'
                };
                group.it.push({"a":{"a":0,"ix":1,"k":[0,0]},"nm":"Transform","o":{"a":0,"ix":7,"k":100},"p":{"a":0,"ix":2,"k":[0,0]},"r":{"a":1,"ix":6,"k":[{s:0,e:0,t:0},{s:0,e:0,t:1}]},"s":{"a":0,"ix":3,"k":[100,100]},"sa":{"a":0,"ix":5,"k":0},"sk":{"a":0,"ix":4,"k":0},"ty":"tr"});
                
                this.arr.splice(0,0,group);
                this._groups.splice(0,0,group);
                this._currentCopies += 1;
            }
            this.elem.reloadShapes();
        }
        cont = 0;
        var renderFlag;
        for(i = 0; i  <= this._groups.length - 1; i += 1){
            renderFlag = cont < copies;
            this._groups[i]._render = renderFlag;
            this.changeGroupRender(this._groups[i].it, renderFlag);
            cont += 1;
        }
        
        this._currentCopies = copies;
        ////

        var offset = this.o.v;
        var offsetModulo = offset%1;
        var roundOffset = offset > 0 ? Math.floor(offset) : Math.ceil(offset);
        var k;
        var tMat = this.tr.v.props;
        var pProps = this.pMatrix.props;
        var rProps = this.rMatrix.props;
        var sProps = this.sMatrix.props;
        this.pMatrix.reset();
        this.rMatrix.reset();
        this.sMatrix.reset();
        this.tMatrix.reset();
        this.matrix.reset();
        var iteration = 0;

        if(offset > 0) {
            while(iteration<roundOffset){
                this.applyTransforms(this.pMatrix, this.rMatrix, this.sMatrix, this.tr, 1, false);
                iteration += 1;
            }
            if(offsetModulo){
                this.applyTransforms(this.pMatrix, this.rMatrix, this.sMatrix, this.tr, offsetModulo, false);
                iteration += offsetModulo;
            }
        } else if(offset < 0) {
            while(iteration>roundOffset){
                this.applyTransforms(this.pMatrix, this.rMatrix, this.sMatrix, this.tr, 1, true);
                iteration -= 1;
            }
            if(offsetModulo){
                this.applyTransforms(this.pMatrix, this.rMatrix, this.sMatrix, this.tr, - offsetModulo, true);
                iteration -= offsetModulo;
            }
        }
        i = this.data.m === 1 ? 0 : this._currentCopies - 1;
        dir = this.data.m === 1 ? 1 : -1;
        cont = this._currentCopies;
        var j, jLen;
        while(cont){
            items = this.elemsData[i].it;
            itemsTransform = items[items.length - 1].transform.mProps.v.props;
            jLen = itemsTransform.length;
            items[items.length - 1].transform.mProps._mdf = true;
            items[items.length - 1].transform.op._mdf = true;
            if(iteration !== 0){
                if((i !== 0 && dir === 1) || (i !== this._currentCopies - 1 && dir === -1)){
                    this.applyTransforms(this.pMatrix, this.rMatrix, this.sMatrix, this.tr, 1, false);
                }
                this.matrix.transform(rProps[0],rProps[1],rProps[2],rProps[3],rProps[4],rProps[5],rProps[6],rProps[7],rProps[8],rProps[9],rProps[10],rProps[11],rProps[12],rProps[13],rProps[14],rProps[15]);
                this.matrix.transform(sProps[0],sProps[1],sProps[2],sProps[3],sProps[4],sProps[5],sProps[6],sProps[7],sProps[8],sProps[9],sProps[10],sProps[11],sProps[12],sProps[13],sProps[14],sProps[15]);
                this.matrix.transform(pProps[0],pProps[1],pProps[2],pProps[3],pProps[4],pProps[5],pProps[6],pProps[7],pProps[8],pProps[9],pProps[10],pProps[11],pProps[12],pProps[13],pProps[14],pProps[15]);
                
                for(j=0;j<jLen;j+=1) {
                    itemsTransform[j] = this.matrix.props[j];
                }
                this.matrix.reset();
            } else {
                this.matrix.reset();
                for(j=0;j<jLen;j+=1) {
                    itemsTransform[j] = this.matrix.props[j];
                }
            }
            iteration += 1;
            cont -= 1;
            i += dir;
        }
    } else {
        cont = this._currentCopies;
        i = 0;
        dir = 1;
        while(cont){
            items = this.elemsData[i].it;
            itemsTransform = items[items.length - 1].transform.mProps.v.props;
            items[items.length - 1].transform.mProps._mdf = false;
            items[items.length - 1].transform.op._mdf = false;
            cont -= 1;
            i += dir;
        }
    }
};

RepeaterModifier.prototype.addShape = function(){};

ShapeModifiers.registerModifier('rp',RepeaterModifier);