class IdmQuantityPicker{
  constructor({selector , min, max, ref}) {
    const container = selector ? document.querySelector(selector) : ref;
    if(!container){
      console.error("IdmQuantityPicker: container not found.");
      return;
    }
    this.container=container;
    const input = this.container.querySelector(".idm-quantity-picker__input");
    if(!input){
      console.error("IdmQuantityPicker: input not found");
      return;
    }
    this.input = input;
    
    if(typeof min === "undefined"){
      min = this.input.min;
    }else{
      this.input.min=min;
    }
    
    if(typeof min === "undefined"){
      max = this.input.max;
    }else{
      this.input.max=max;
    }
    
    this.min = min;
    this.max = max;
    this._value = Number.parseInt(input.value);
    
    this.init();
  }
  
  
  updateInput(){
    this.input.value = this._value;
  }
  
  // unused
  get value() {
    return this._value;
  }
  
  set value(newValue) {
    if (newValue < this.min || newValue > this.max) return;
    
    this._value = newValue;
    this.updateInput();
  }
  
  handlePlus(){
    this.value++;
    
  }
  
  handleMinus(){
    this.value--;
  }
  
  initEvents(){
    const minusButton = this.container.querySelector(".idm-quantity-picker__minus");
    const plusButton = this.container.querySelector(".idm-quantity-picker__plus");
    
    if(!minusButton){
      console.error("IdmQuantityPicker: minus button not found.");
      return;
    }
    
    if(!plusButton){
      console.error("IdmQuantityPicker: plus button not found.");
      return;
    }
    
    minusButton.addEventListener("click", () => this.handleMinus());
    plusButton.addEventListener("click", () => this.handlePlus());
  }
  
  init(){
    console.log("IdmQuantityPicker: init.");
    this.initEvents();
  }
}