$(function(){
    var ee = 23;
	calc();

	$('#calc_plan').on('change', calc);
	$('#inv_amount').bind('change keyup', calc).on('keypress', isNumberKey);

});

function isNumberKey(evt) {
	var charCode = (evt.which) ? evt.which : event.keyCode;
	if (charCode > 31 && (charCode < 45 || charCode > 57))
		return false;
	return true;
}

function calc(interval) {

	var plan = $('#calc_plan').val();
	var amount = $('#inv_amount').val();
	//console.log(amount);

	var formatter = new Intl.NumberFormat('en-US', {
              style: 'currency',
              currency: 'USD',
            });
	var netprofit = amount*plan/100*7;
	var total = amount*plan/100*7+Number(amount);
	$('#total_return').val(formatter.format(total));
	//console.log(total);
	//console.log(plan);
	if(total <= 0){
		$('#net_profit').html(formatter.format('0.00'));
	}else if (isNaN(total)){
    	$('#net_profit').html(formatter.format('0.00'));
    	$('#total_return').html(formatter.format('0.00'));
	}else{
		$('#net_profit').html(formatter.format(total-amount));
	}
	var select_class = $('select[id="calc_plan"] :selected').attr('class');
	var minimum_value = $('.min-' + select_class).html();
	var maximum_value = $('.max-' + select_class).html();
    var minimum = Number(minimum_value.replace(/[^0-9.-]+/g,""));
    var maximum = Number(maximum_value.replace(/[^0-9.-]+/g,""));
	
	$(".error").remove();
	error_flag(amount, minimum, maximum)
}

function error_flag(amount, minimum, maximum){
    if(amount < minimum){
        $('#inv_amount').after('<span class="error"style="color:red;margin-left:5px;">Amount too low, increase value. Min is ' + minimum + '</span>');
	}else if(amount > maximum){
	    $('#inv_amount').after('<span class="error"style="color:red;margin-left:5px;">Maximum limit exceeded. Max is ' + maximum + '</span>');
	}
}