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// click on keyboard
$('.calculator__item:not(#send-money-clear)').on('click', function(e) {
	e.stopPropagation();
  	e.preventDefault();
  	e.cancelable = true;

	var $sendMoney = $('#send-money');
	Calculator.plus({
		sendMoney: $sendMoney,
		sendMoneyVal: $sendMoney.val(),
		currentVal: $(this).find('span').text(),
		action: $(this).closest('[data-action]').data('action')

	});

	Calculator.validator({ _this: $sendMoney });
});

$('#send-money').on('keyup', function() {
	Calculator.validator({ _this: $(this) });
});


// clear input data
$('#send-money-clear').on('click', function(e) {
	e.stopPropagation();
  	e.preventDefault();
	Calculator.clear({ _this: $('#send-money') });
});

var Calculator = (function() {
	return {
		plus: function(data) {
			if(data.sendMoneyVal.match(/[0-9,.]/g) === null) data.sendMoneyVal = '';


			if(data.sendMoneyVal) {
				data.sendMoneyVal = data.sendMoneyVal.match(/[0-9,.]/g).join("");
			}

			if(data.action === 'plus') {
				data.sendMoney.val(+data.currentVal + (+data.sendMoneyVal));
			}
			else {
				data.sendMoney.val(data.sendMoneyVal + '' + data.currentVal);
			}
		},

		validator: function(data) {
			data._this.val(currency + ' ' + data._this.val().match(/[0-9,.]/g).join(""));	
		},

		clear: function(data) {
			if(data._this.val().match(/[0-9,.]/g) === null) return;
			// data._this.focus();
			data._this.val(data._this.val().substring(0, data._this.val().length - 1));
		}
	}
}());