let callbackCounter = 1;


function imagick() {

  let stack = [];

  let callbackFunction = function(param) {
    stack.push(param);
  }

  this.composit = function(param1) {

    return new _composit(param1, this, callbackFunction)
  }
  this.convert = function(param2) {
    let callbackFunction = function(param) {
      console.log("param");
    }
    return new _convert(param2, this, callbackFunction)
  }

  this.write = function() {
    console.log("collecting stack");
    console.log(stack);
  }


}

function _composit(param, parent, callback) {
  // reference to parent object
  this.parentObj = parent;

  this.att = param

  console.log(this.att);

  this.test = function (obj) {
    console.log(obj);

    // return to reference from itself
    return this;
  }

  this.end = function() {
    // return to reference of parent object
    callback("callback" + callbackCounter);

    callbackCounter++;

    return this.parentObj;
  }
}

function _convert(param, parent, callback) {
  // reference to parent object
  this.parentObj = parent;

  // saving param
  this.att = param;

  // printing att
  console.log(this.att);

  this.resize = function (obj) {
    console.log(obj);

    // return to reference from itself
    return this;
  }

  this.end = function() {
    // return to reference of parent object
    callback();
    return this.parentObj;
  }
}


var im = new imagick();

im.composit("test").end().composit("test").end().composit("test").end().write();