var pinWindowPINValue = "";
var pinWindowPreviousHandle = null;

/*
 * Messages that may need to be retried after getting a PIN
 */
var cackeyMessagesToRetry = [];

/*
 * Stored PIN for a given certificate
 */
var cackeyCertificateToPINMap = {};

/*
 * Compute a text-based handle for a certificate to be hashed by
 */
function cackeyCertificateToPINID(certificate) {
	var id;
	var certificateArray;

	id = "";

	certificateArray = new Uint8Array(certificate);

	certificateArray.map(
		function(byte) {
			id += ("0" + byte.toString(16)).slice(-2);
		}
	);

	delete certificateArray;

	return(id);
}

/*
 * Handle a response from the NaCl side regarding certificates available
 */
function cackeyMessageIncomingListCertificates(message, chromeCallback) {
	var idx;
	var certificates = [];

	if (messageEvent.data.target != "cackey") {
		return;
	}

	console.log("START MESSAGE");
	console.log(messageEvent.data);
	console.log("END MESSAGE");

	/*
	 * If we failed for some reason and we have a certificate in the original
	 * request then forget any PIN associated with that certificate
	 */
	if (messageEvent.data.status != "success") {
		if (messageEvent.data.originalrequest.certificate) {
			delete cackeyCertificateToPINMap[cackeyCertificateToPINID(messageEvent.data.originalrequest.certificate)];
		}
	}

	if (messageEvent.data.id == null) {
		return;
	}

	chromeCallback = cackeyOutstandingCallbacks[messageEvent.data.id];

							tmpMessageEvent.data.status = "error";
							tmpMessageEvent.data.error = "PIN window closed without a PIN being provided";

							cackeyMessageIncoming(tmpMessageEvent);
						} else {
							tmpMessageEvent.data.originalrequest.pin = pinWindowPINValue;

							cackeyCertificateToPINMap[cackeyCertificateToPINID(tmpMessageEvent.data.originalrequest.certificate)] = pinWindowPINValue;

							cackeyHandle.postMessage(tmpMessageEvent.data.originalrequest);
						}

						delete cackeyMessagesToRetry[messageIdx];
					}

					/*
					 * We are done fetching the user PIN, clear the value
					 */
					pinWindowPINValue = "";

					return;
				})

				/*
				 * Pass this message off to the other window so that it may resubmit the request.
				 */
				pinWindow.contentWindow.parentWindow = window;

}

/*
 * Handler for messages from Chrome related to signing a hash of some sort
 */
function cackeySignMessage(signRequest, chromeCallback) {
	var callbackId;
	var command;
	var certificateId;

	console.log("[cackey] Asked to sign a message -- throwing that request over to the NaCl side... ");

	callbackId = cackeyOutstandingCallbackCounter + 1;

	command = {

		'target': "cackey",
		'command': "sign",
		'id': callbackId,
		'certificate': signRequest.certificate,
		'data': signRequest.digest /* XXX:TODO: This needs to be prefixed based on the signRequest.hash */
	};

	certificateId = cackeyCertificateToPINID(command.certificate);

	if (cackeyCertificateToPINMap[certificateId]) {
		command.pin = cackeyCertificateToPINMap[certificateId];
	}

	cackeyHandle.postMessage(command);

	cackeyOutstandingCallbackCounter = callbackId;
	cackeyOutstandingCallbacks[callbackId] = chromeCallback;

	console.log("[cackey] Thrown.");

	return;