jQuery(document).ready(function() {
	// Handle sendlink form.
	jQuery("#submit-button").click(function(event){
		event.preventDefault();
		upgrade();
    });
	jQuery("#prodkey").keypress(function(event){
		if (event.which == 13) {
			event.preventDefault();
			upgrade();
		}
    });
});

function upgrade() {
	var prodkey = trim(jQuery("#prodkey").val());
	if (!validateProductKey(prodkey)) {
		alert("Please enter a valid product key!");
		jQuery("#prodkey").focus();
		return;
	}
	jQuery("#submit-button").attr('disabled', 'disabled');
	jQuery("#spinner-div").show();
	jQuery.post("http://www.cerience.com/wp-content/plugins/cerience/upgrade.php", { prodkey: prodkey }, function(response){
		jQuery("#spinner-div").hide();
		jQuery("#submit-button").removeAttr('disabled');
		response = trim(response);
		if (response == "success") {
			if (confirm("Your product key was verified. Click OK to see your upgrade discount in our secure shopping cart.")) {
				window.location = "https://www.cerience.com/purchase/reader?prodkey=" + prodkey;
			}
		} else if (response.substr(0,5) == "free:") {
			var email = response.substr(5);
			if (confirm("Congratulations! You qualify for a free upgrade. Click OK to have your new product key emailed to " + email + ". Your full email address is not shown for security purposes.")) {
				emailKey(prodkey, email);
			}
		} else if (response == "not_found") {
			alert("Your product key could not be located. Please try again.");
		} else if (response == "used") {
			alert("This product key has already been used for an upgrade.");
		} else {
			alert("Sorry, an error occurred. Please report this to our support team.");
		}
	});
}

function emailKey(prodkey, email) {
	jQuery("#submit-button").attr('disabled', 'disabled');
	jQuery("#spinner-div").show();
	jQuery.post("http://www.cerience.com/wp-content/plugins/cerience/upgrade.php", { prodkey: prodkey, send: "1" }, function(response){
		jQuery("#spinner-div").hide();
		jQuery("#submit-button").removeAttr('disabled');
		response = trim(response);
		if (response == "success") {
			alert("Thank you! Your new product key was successfully emailed to " + email + ".");
		} else {
			alert("Sorry, an error occurred. Please try again.");
		}
	});
}

function trim(str) {
	return str.replace(/^\s+|\s+$/g,"");
}

function validateProductKey(prodkey) {
	return (prodkey.length != 0);
}