payment_cost_order_product.js

function payment_cost_order_product_id(cart_json){
  var id = null;
  $.each(cart_json.products, function( i, order_product ){
    if(order_product.product_id == '287177'){ // product for adding payment cost.
      id = order_product.id;
    }
	});
  return id; // return order_product.id if found
}

$(document).ready(function() {
  
  
  //Custom Payments / Shipping Logic
    var update_payment_methods = function(data){
     var region = $("#order_shipping_address_region").val();
      
    // payments to be charged at destination. only available to country=Portugal or Spain.
    if ($("#order_shipping_address_country").val() == 'PT') {
    	$("#order_payment_method_122625").parent('li').show(); // manual // https://www.evernote.com/l/APakQA2Fpc5C2KqA0FdDSwAtRl5iytm-FBk
    } else if ($("#order_shipping_address_country").val() == 'ES' && region != '07' && region != '53' && region != 'CE' && region != 'ML') {
			$("#order_payment_method_122625").parent('li').show();
    } else{ 
      $("#order_payment_method_122625").parent('li').hide(); // manual // https://www.evernote.com/l/APakQA2Fpc5C2KqA0FdDSwAtRl5iytm-FBk
    	$("#order_payment_method_122625").prop('checked',false).removeAttr('checked');
    }
      
    // IfThenPay (referencias multibanco). Only available to country=Portugal.
    if ($("#order_shipping_address_country").val() == 'PT'){
      $("#order_payment_method_121994").parent('li').show(); // ifthenpay 
    }else{
      $("#order_payment_method_121994").parent('li').hide(); // ifthenpay      
    	$("#order_payment_method_121994").prop('checked',false).removeAttr('checked');
    }
      
      // IfThenPay (referencias MBWAY). Only available to country=Portugal.
    if ($("#order_shipping_address_country").val() == 'PT'){
      $("#order_payment_method_130686").parent('li').show(); // ifthenpay 
    }else{
      $("#order_payment_method_130686").parent('li').hide(); // ifthenpay      
    	$("#order_payment_method_130686").prop('checked',false).removeAttr('checked');
    }
  }
  
  var remove_payment = function(data){
    var order_product_id = payment_cost_order_product_id(data);
    Jumpseller.updateCart(order_product_id, 0); // no payment cost on the order.
  }
  
  var payment_cost_updated = function(data){
    var order_product_id = payment_cost_order_product_id(data);
    Jumpseller.updateCart(order_product_id, 1); // only one payment cost per order.
  }
  
  var update_payment_cost = function(event){
    var payment_method_selected_id = $("input[type=radio][name='order[payment_method]']:checked").val();
    console.log(payment_method_selected_id);
    // if selected manual payment ("Pagamento à Cobrança").
		if(payment_method_selected_id == '122625'){
      if ($("#order_shipping_address_country").val() == 'PT'){
        Jumpseller.getCart({callback: remove_payment}) // remove before adding.
	      Jumpseller.addProductToCart(287177, 1, {"País": 1652224}, {callback: payment_cost_updated}) // adds payment cost for portugal.
      }      
      else if ($("#order_shipping_address_country").val() == 'ES'){
        Jumpseller.getCart({callback: remove_payment}) // remove before adding.
        Jumpseller.addProductToCart(287177, 1, {"País": 1652225}, {callback: payment_cost_updated}) // adds payment cost for Espanha. 
      }
      else {
        Jumpseller.getCart({callback: remove_payment}) // remove payment cost from the cart for non PT/ES countries.
      }
    }else{
      Jumpseller.getCart({callback: remove_payment}) // remove payment cost from the cart for non PT/ES countries.
    }
  }
  // start listenning for shipping and payment methods changes.
  Jumpseller.paymentMethodListener("input[type=radio][name='order[payment_method]']", {callback: update_payment_cost});
  Jumpseller.countryListener("#order_shipping_address_country", {callback: update_payment_cost});
  
  Jumpseller.countryListener("#order_shipping_address_country", {callback: update_payment_methods});
  Jumpseller.regionListener("#order_shipping_address_region", {callback: update_payment_methods});

  $("#order_shipping_address_country").change();
});