add_action('woocommerce_after_order_notes', 'ncydesign_end_datepicker_field', 10, 1);
function ncydesign_end_datepicker_field( $checkout ) {

    date_default_timezone_set('America/Los_Angeles');
    $mydateoptions = array('' => __('Select PickupDate', 'woocommerce' ));

    echo '<div id="my_custom_checkout_field">
    <h3>'.__('Delivery Date').'</h3>';
$today = date("Y-m-d");
    echo '<div id="start_date_checkout_field"><input type="date" min="'.$today.'" onchange="changeamount(this.value)" name="calendarstart">';
    // YOUR SCRIPT HERE BELOW
    echo '
    <script>
        jQuery(function($){
            $("#datepickerend").datepicker();
        });
    </script>';

  /* woocommerce_form_field( 'delivery_date_end', array(
        'type'          => 'text',
        'class'         => array('my-field-class form-row-wide'),
        'id'            => 'datepickerend',
        'required'      => false,
        'label'         => __('Delivery Date'),
        'placeholder'       => __('Select Date'),
        'options'     =>   $mydateoptions
        ),
    $checkout->get_value( 'cylinder_collet_date' ));*/

    echo '</div>';
}
/**
 * Process the checkout
 **/
add_action('woocommerce_checkout_process', 'my_custom_checkout_field_end_process');

function my_custom_checkout_field_end_process() {
    global $woocommerce;

    // Check if set, if its not set add an error.
    if (!$_POST['delivery_date_end'])
         wc_add_notice( '<strong>Delivery Date</strong> ' . __( 'is a required field.', 'woocommerce' ), 'error' );
}
 /**
 * Update the order meta with custom fields values
 * */
 add_action('woocommerce_checkout_update_order_meta', 'my_custom_checkout_field_update_end_order_meta');

 function my_custom_checkout_field_update_end_order_meta($order_id) {

if (!empty($_POST['delivery_date_end'])) {
    update_post_meta($order_id, 'End Date', sanitize_text_field($_POST['delivery_date_end']));
}
}
add_action( 'wp_enqueue_scripts', 'enabling_start_date_picker' );
function enabling_start_date_picker() {

    // Only on front-end and checkout page
    if( is_admin() || ! is_checkout() ) return;

    // Load the datepicker jQuery-ui plugin script
    wp_enqueue_script( 'jquery-ui-datepicker' );
}

// Call datepicker functionality in your custom text field
add_action('woocommerce_after_order_notes', 'ncydesign_start_datepicker_field', 10, 1);
function ncydesign_start_datepicker_field( $checkout ) {

    date_default_timezone_set('America/Los_Angeles');
    $mydateoptions = array('' => __('Select PickupDate', 'woocommerce' ));

    echo '<div id="start_date_checkout_field">
    <h3>'.__('start Date').'</h3>';


    global $woocommerce;

    //print_r($_COOKIE);
    $amount = floatval( preg_replace( '#[^\d.]#', '', $woocommerce->cart->get_cart_total() ) );
    // YOUR SCRIPT HERE BELOW
    //print_r($woocommerce->cart);
echo $amount;
?>
   <input type="date" onchange="changeamount(this.value)" name="calendarend">
    <script>
        jQuery(function($){
            $("#datepickerstart").datepicker();
        });

                function changeamount($thiss){
            var amouns = '<?php echo $amount ?>';
            var s = jQuery( "input[name=calendarstart]" ).val();

            var e = jQuery( "input[name=calendarend]" ).val();

                if(s){
                    if(e){




        jQuery.ajax({
            url: "<?php echo admin_url('admin-ajax.php') ?>",
            type: "POST",
            data: "action=cats&d1="+s+"&d2="+e+"&amount="+amouns, // можно также передать в виде массива или объекта
            success: function( data ) {
                //alert(data);
        //woocommerce-Price-currencySymbol
            var cur = jQuery( ".woocommerce-Price-currencySymbol:eq(1)" ).text();
            alert(data);
                        jQuery( ".woocommerce-Price-amount:eq(1)" ).text(cur+data);
                        jQuery( ".woocommerce-Price-amount:eq(2)" ).text(cur+data);
         }
        });
                }
        }
    }

    </script>
<?php



   /*woocommerce_form_field( 'delivery_date_start', array(
        'type'          => 'text',
        'class'         => array('my-field-class form-row-wide'),
        'id'            => 'datepickerstart',
        'required'      => false,
        'label'         => __('start Date'),
        'placeholder'       => __('Select Date'),
        'options'     =>   $mydateoptions
        ),
    $checkout->get_value( 'start_date_checkout_ncy' ));*/

    echo '</div>';
}
/**
 * Process the checkout
 **/
add_action('woocommerce_checkout_process', 'my_custom_checkout_start_field_process');

/*function my_custom_checkout_start_field_process() {
    global $woocommerce;

    // Check if set, if its not set add an error.
    if (!$_POST['delivery_date_start'])
         wc_add_notice( '<strong>Delivery Date</strong> ' . __( 'is a required field.', 'woocommerce' ), 'error' );
}

 add_action('woocommerce_checkout_update_order_meta', 'my_custom_checkout_field_update_order_meta');

 function my_custom_checkout_field_update_order_meta($order_id) {

if (!empty($_POST['delivery_date_start'])) {
    update_post_meta($order_id, 'start Date', sanitize_text_field($_POST['delivery_date_start']));
}
}*/
add_action( 'wp_ajax_cats', 'sets_days_amount' );
add_action( 'wp_ajax_nopriv_cats', 'sets_days_amount' );
function sets_days_amount(){
// Первая дата
$d1 = $_POST['d1'];

// Вторая дата
$d2 = $_POST['d2'];

$amoun = $_POST['amount'];

// timestamp первой даты
$d1_ts = strtotime($d1);

// timestamp второй даты
$d2_ts = strtotime($d2);

// Количество секунд
// Функция abs нужна, чтобы не проверять какая из двух дат больше
$seconds = abs($d1_ts - $d2_ts);

// Количество дней нужно округлить в меньшую сторону,
// чтобы узнать точное количество прошедших дней
// 86400 - количество секунд в 1 дней (60 * 60 * 24)
$days = floor($seconds / 86400);

//return $days;//3

$daysCoupon = 2;
$coupon = 10;

$coupon = $coupon/100;
if((int)$days >= $daysCoupon){

    //срабатывает при условии что превысило


    //echo '111';
     $skid = $amoun*$coupon;

    $am  =$amoun-$skid;
    global $woocommerce;


//  $amount = floatval( preg_replace( '#[^\d.]#', '', $woocommerce->cart->get_cart_total() ) );
    //echo $amoun-$skid;
//  echo $amount;
     add_action( 'woocommerce_review_order_before_order_total', 'custom_cart_total' );
add_action( 'woocommerce_before_cart_totals', 'custom_cart_total' );
function custom_cart_total() {

    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
            return;
    global $am;
    WC()->cart->total = $am;
    //var_dump( WC()->cart->total);
}
    echo $am;
    die();
}else{
    return (int)$days*$amoun;
}



//print_r( $_POST);

}