"use strict";

// remap jQuery to $
(function ($) {

  /* trigger when page is ready */
  $(document).ready(function () {
    QTYButtons.init();    
  });

})(window.jQuery);


var QTYButtons = {
  init: function () {
    
    
    $( '.quantity:not(.qty-buttons-added)' )
    .addClass( 'qty-buttons-added' )
    .append( '<input type="button" value="+" class="plus" />' )
    .prepend( '<input type="button" value="-" class="minus" />' );
    $('.quantity .qty-input').attr('type', 'text');
    
    
    $(".quantity .qty-input").keydown(function (e) {
        // Allow: backspace, delete, tab, escape, enter and .
        if ($.inArray(e.keyCode, [46, 8, 9, 27, 13, 190]) !== -1 ||
             // Allow: Ctrl+A
            (e.keyCode == 65 && e.ctrlKey === true) || 
             // Allow: home, end, left, right
            (e.keyCode >= 35 && e.keyCode <= 39)) {
                 // let it happen, don't do anything
                 return;
        }
        // Ensure that it is a number and stop the keypress
        if ((e.shiftKey || (e.keyCode < 48 || e.keyCode > 57)) && (e.keyCode < 96 || e.keyCode > 105)) {
            e.preventDefault();
        }
    });
    
    $( document ).on( 'click', '.quantity .plus, .quantity .minus', function() {
    // Get values
        var $qty		= $( this ).closest( '.quantity' ).find( '.qty-input' ),
            currentVal	= parseFloat( $qty.val() ),
            max			= parseFloat( $qty.attr( 'max' ) ),
            min			= parseFloat( $qty.attr( 'min' ) ),
            step		= $qty.attr( 'step' );

        // Format values
        if ( ! currentVal || currentVal === '' || currentVal === 'NaN' ) currentVal = 0;
        if ( max === '' || max === 'NaN' ) max = '';
        if ( min === '' || min === 'NaN' ) min = 0;
        if ( step === 'any' || step === '' || step === undefined || parseFloat( step ) === 'NaN' ) step = 1;

        // Change the value
        if ( $( this ).is( '.plus' ) ) {

            if ( max && ( max == currentVal || currentVal > max ) ) {
                $qty.val( max );
            } else {
                $qty.val( currentVal + parseFloat( step ) );
            }

        } else {

            if ( min && ( min == currentVal || currentVal < min ) ) {
                $qty.val( min );
            } else if ( currentVal > 0 ) {
                $qty.val( currentVal - parseFloat( step ) );
            }

        }

        // Trigger change event
        $qty.trigger( 'change' );
    });
  
  }
};