<!-- Estimate shipping values on the checkout page -->
<script>
  function cleanEstimates(){
    // remove all prices and errors
  	$('#shipping_options li').each(function(){ $(this).children().last().detach(); });

		// add empty messages - placeholders
    $('#shipping_options li').each(function(){ $(this).append('<span></span>') });
  }

  function shippingEstimates(){
    if($('#order_shipping_address_country').val() != "" && $('#order_shipping_address_region').val() != ""){
      $.ajax({
        method: "POST",
        url: "/checkout/shipping_estimate",
        data: {
          estimate: {
            country: $('#order_shipping_address_country').val(),
            region: $('#order_shipping_address_region').val(),
            municipality: $('#order_shipping_address_municipality').val(),
            postal: $('#order_shipping_address_postal') .val()
          }
        }
      }).done(function( data ) {
          for(var i = 0; i < data.length; i++){
            // remove any previous messages & placeholders
            $('#shipping_options #order_shipping_method_' + data[i].table.id).parent().children().last().detach();

            if(data[i].table.error){
              // disable options with errors
              $('#shipping_options #order_shipping_method_' + data[i].table.id).attr('disabled', 'disabled');

              // add error messages
              $('#shipping_options #order_shipping_method_' + data[i].table.id).parent().append("<p class='shipping_information'><i>" + data[i].table.error_message + "</i></p>")
            } else {
              // enable options
              $('#shipping_options #order_shipping_method_' + data[i].table.id).attr('disabled', false);

              // add formatted shipping prices
              $('#shipping_options #order_shipping_method_' + data[i].table.id).parent().append("<p class='shipping_information'><i>" + data[i].table.price + "</i></p>")
            }
          }
        });
    } else {
      // no Country or Region filled, clear shipping estimate info
      cleanEstimates();
    }
  }

  $('#order_shipping_address_country').change(function(){shippingEstimates()});
  $('#order_shipping_address_region').change(function(){shippingEstimates()});
  $('#order_shipping_address_municipality').change(function(){shippingEstimates()});
  $(document).ready(function(){
    // add empty messages - placeholders
    $('#shipping_options li').each(function(){ $(this).append('<span></span>') });
  	shippingEstimates();
  })
</script>