//-----------------------------------------------------------------------
// <copyright file="OpenIdAjaxTextBox.js" company="Outercurve Foundation>
//     Copyright (c) Outercurve Foundation. All rights reserved.
//     This file may be used and redistributed under the terms of the
//     Microsoft Public License (Ms-PL) http://opensource.org/licenses/ms-pl.html
// </copyright>
//-----------------------------------------------------------------------

function initAjaxOpenId(box, openid_logo_url, spinner_url, success_icon_url, failure_icon_url,
		throttle, timeout, assertionReceivedCode,
		loginButtonText, loginButtonToolTip, showLoginPostBackButton, loginPostBackToolTip,
		retryButtonText, retryButtonToolTip, busyToolTip,
		identifierRequiredMessage, loginInProgressMessage,
		authenticatedByToolTip, authenticatedAsToolTip, authenticationFailedToolTip,
		autoPostback, postback) {
	box.dnoi_internal = {
		postback: postback
	};
	if (assertionReceivedCode) {
		box.dnoi_internal.onauthenticated = function(sender, e) { eval(assertionReceivedCode); };
	}

	box.dnoi_internal.originalBackground = box.style.background;
	box.timeout = timeout;

	box.dnoi_internal.authenticationIFrames = new window.dnoa_internal.FrameManager(throttle);

	box.dnoi_internal.constructButton = function(text, tooltip, onclick) {
		var button = document.createElement('input');
		button.textContent = text; // Mozilla
		button.value = text; // IE
		button.type = 'button';
		button.title = tooltip || '';
		button.onclick = onclick;
		box.parentNode.appendChild(button);
		return button;
	};

	box.dnoi_internal.constructSplitButton = function(text, tooltip, onclick, menu) {
		var htmlButton = box.dnoi_internal.constructButton(text, tooltip, onclick);

		if (!box.parentNode.className || box.parentNode.className.indexOf(' yui-skin-sam') < 0) {
			box.parentNode.className = (box.parentNode.className || '') + ' yui-skin-sam';
		}

		var splitButton = new YAHOO.widget.Button(htmlButton, {
			type: 'split',
			menu: menu
		});

		splitButton.on('click', onclick);

		return splitButton;
	};

	box.dnoi_internal.createLoginPostBackButton = function() {
		var postback = function() {
			var discoveryResult = window.dnoa_internal.discoveryResults[box.value];
			var respondingEndpoint = discoveryResult.findSuccessfulRequest();
			box.dnoi_internal.postback(discoveryResult, respondingEndpoint, respondingEndpoint.extensionResponses, { background: false });
		};
		var button = box.dnoi_internal.constructButton(loginButtonText, loginPostBackToolTip, postback);
		button.style.visibility = 'visible';
		button.destroy = function() {
			button.parentNode.removeChild(button);
		};

		return button;
	};

	box.dnoi_internal.createLoginButton = function(providers) {
		var onMenuItemClick = function(p_sType, p_aArgs, p_oItem) {
			var selectedProvider = (p_oItem && p_oItem.value) ? p_oItem.value : providers[0].value;
			selectedProvider.loginPopup();
			return false;
		};

		for (var i = 0; i < providers.length; i++) {
			providers[i].onclick = { fn: onMenuItemClick };
		}

		// We'll use the split button if we have more than one Provider, and the YUI library is available.
		if (providers.length > 1 && YAHOO && YAHOO.widget && YAHOO.widget.Button) {
			return box.dnoi_internal.constructSplitButton(loginButtonText, loginButtonToolTip, onMenuItemClick, providers);
		} else {
			var button = box.dnoi_internal.constructButton(loginButtonText, loginButtonToolTip, onMenuItemClick);
			button.style.visibility = 'visible';
			button.destroy = function() {
				button.parentNode.removeChild(button);
			};
			return button;
		}
	};

	box.dnoi_internal.constructIcon = function(imageUrl, tooltip, rightSide, visible, height) {
		var icon = document.createElement('img');
		icon.src = imageUrl;
		icon.title = tooltip || '';
		icon.originalTitle = icon.title;
		if (!visible) {
			icon.style.visibility = 'hidden';
		}
		icon.style.position = 'absolute';
		icon.style.top = "2px";
		icon.style.bottom = "2px"; // for FireFox (and IE7, I think)
		if (height) {
			icon.style.height = height; // for Chrome and IE8
		}
		if (rightSide) {
			icon.style.right = "2px";
		} else {
			icon.style.left = "2px";
		}
		box.parentNode.appendChild(icon);
		return icon;
	};

	box.dnoi_internal.prefetchImage = function(imageUrl) {
		var img = document.createElement('img');
		img.src = imageUrl;
		img.style.display = 'none';
		box.parentNode.appendChild(img);
		return img;
	};

	function findParentForm(element) {
		if (!element || element.nodeName == "FORM") {
			return element;
		}

		return findParentForm(element.parentNode);
	}

	box.parentForm = findParentForm(box);

	function findOrCreateHiddenField() {
		var name = box.name + '_openidAuthData';
		var existing = window.document.getElementsByName(name);
		if (existing && existing.length > 0) {
			return existing[0];
		}

		var hiddenField = document.createElement('input');
		hiddenField.setAttribute("name", name);
		hiddenField.setAttribute("type", "hidden");
		box.parentForm.appendChild(hiddenField);
		return hiddenField;
	}

	box.dnoi_internal.retryButton = box.dnoi_internal.constructButton(retryButtonText, retryButtonToolTip, function() {
		box.timeout += 5000; // give the retry attempt 5s longer than the last attempt
		box.dnoi_internal.performDiscovery();
		return false;
	});
	box.dnoi_internal.openid_logo = box.dnoi_internal.constructIcon(openid_logo_url, null, false, true);
	box.dnoi_internal.op_logo = box.dnoi_internal.constructIcon('', authenticatedByToolTip, false, false, "16px");
	box.dnoi_internal.op_logo.style.maxWidth = '16px';
	box.dnoi_internal.spinner = box.dnoi_internal.constructIcon(spinner_url, busyToolTip, true);
	box.dnoi_internal.success_icon = box.dnoi_internal.constructIcon(success_icon_url, authenticatedAsToolTip, true);
	box.dnoi_internal.failure_icon = box.dnoi_internal.constructIcon(failure_icon_url, authenticationFailedToolTip, true);

	box.dnoi_internal.dnoi_logo = box.dnoi_internal.openid_logo;

	box.dnoi_internal.setVisualCue = function(state, authenticatedBy, authenticatedAs, providers, errorMessage) {
		box.dnoi_internal.openid_logo.style.visibility = 'hidden';
		box.dnoi_internal.dnoi_logo.style.visibility = 'hidden';
		box.dnoi_internal.op_logo.style.visibility = 'hidden';
		box.dnoi_internal.openid_logo.title = box.dnoi_internal.openid_logo.originalTitle;
		box.dnoi_internal.spinner.style.visibility = 'hidden';
		box.dnoi_internal.success_icon.style.visibility = 'hidden';
		box.dnoi_internal.failure_icon.style.visibility = 'hidden';
		box.dnoi_internal.retryButton.style.visibility = 'hidden';
		if (box.dnoi_internal.loginButton) {
			box.dnoi_internal.loginButton.destroy();
			box.dnoi_internal.loginButton = null;
		}
		if (box.dnoi_internal.postbackLoginButton) {
			box.dnoi_internal.postbackLoginButton.destroy();
			box.dnoi_internal.postbackLoginButton = null;
		}
		box.title = '';
		box.dnoi_internal.state = state;
		var opLogo;
		if (state == "discovering") {
			box.dnoi_internal.dnoi_logo.style.visibility = 'visible';
			box.dnoi_internal.spinner.style.visibility = 'visible';
			box.dnoi_internal.claimedIdentifier = null;
			box.title = '';
			window.status = "Discovering OpenID Identifier '" + box.value + "'...";
		} else if (state == "authenticated") {
			opLogo = box.dnoi_internal.deriveOPFavIcon();
			if (opLogo) {
				box.dnoi_internal.op_logo.src = opLogo;
				box.dnoi_internal.op_logo.style.visibility = 'visible';
				box.dnoi_internal.op_logo.title = box.dnoi_internal.op_logo.originalTitle.replace('{0}', authenticatedBy.getHost());
			}
			//trace("OP icon size: " + box.dnoi_internal.op_logo.fileSize);
			// The filesize check just doesn't seem to work any more.
			if (!opLogo) {// || box.dnoi_internal.op_logo.fileSize == -1 /*IE*/ || box.dnoi_internal.op_logo.fileSize === undefined /* FF */) {
				trace('recovering from missing OP icon');
				box.dnoi_internal.op_logo.style.visibility = 'hidden';
				box.dnoi_internal.openid_logo.style.visibility = 'visible';
				box.dnoi_internal.openid_logo.title = box.dnoi_internal.op_logo.originalTitle.replace('{0}', authenticatedBy.getHost());
			}
			if (showLoginPostBackButton) {
				box.dnoi_internal.postbackLoginButton = box.dnoi_internal.createLoginPostBackButton();
			} else {
				box.dnoi_internal.success_icon.style.visibility = 'visible';
				box.dnoi_internal.success_icon.title = box.dnoi_internal.success_icon.originalTitle.replace('{0}', authenticatedAs);
			}
			box.title = box.dnoi_internal.claimedIdentifier;
			window.status = "Authenticated as " + authenticatedAs;
		} else if (state == "setup") {
			opLogo = box.dnoi_internal.deriveOPFavIcon();
			if (opLogo) {
				box.dnoi_internal.op_logo.src = opLogo;
				box.dnoi_internal.op_logo.style.visibility = 'visible';
			} else {
				box.dnoi_internal.openid_logo.style.visibility = 'visible';
			}

			box.dnoi_internal.loginButton = box.dnoi_internal.createLoginButton(providers);

			box.dnoi_internal.claimedIdentifier = null;
			window.status = "Authentication requires user interaction.";
		} else if (state == "failed") {
			box.dnoi_internal.openid_logo.style.visibility = 'visible';
			box.dnoi_internal.retryButton.style.visibility = 'visible';
			box.dnoi_internal.claimedIdentifier = null;
			window.status = authenticationFailedToolTip;
			box.title = authenticationFailedToolTip;
		} else if (state == "failednoretry") {
			box.dnoi_internal.failure_icon.title = errorMessage;
			box.dnoi_internal.failure_icon.style.visibility = 'visible';
			box.dnoi_internal.openid_logo.style.visibility = 'visible';
			box.dnoi_internal.claimedIdentifier = null;
			window.status = errorMessage;
			box.title = errorMessage;
		} else if (state == '' || !state) {
			box.dnoi_internal.openid_logo.style.visibility = 'visible';
			box.title = '';
			box.dnoi_internal.claimedIdentifier = null;
			window.status = null;
		} else {
			box.dnoi_internal.claimedIdentifier = null;
			trace('unrecognized state ' + state);
		}

		if (box.onStateChanged) {
			box.onStateChanged(state);
		}
	};

	box.dnoi_internal.isBusy = function() {
		var lastDiscovery = window.dnoa_internal.discoveryResults[box.lastDiscoveredIdentifier];
		return box.dnoi_internal.state == 'discovering' ||
			(lastDiscovery && lastDiscovery.busy());
	};

	box.dnoi_internal.canAttemptLogin = function() {
		if (box.value.length === 0) { return false; }
		if (!window.dnoa_internal.discoveryResults[box.value]) { return false; }
		if (box.dnoi_internal.state == 'failed') { return false; }
		return true;
	};

	box.dnoi_internal.getUserSuppliedIdentifierResults = function() {
		return window.dnoa_internal.discoveryResults[box.value];
	};

	box.dnoi_internal.isAuthenticated = function() {
		var results = box.dnoi_internal.getUserSuppliedIdentifierResults();
		return results && results.findSuccessfulRequest();
	};

	box.dnoi_internal.onSubmit = function() {
		var hiddenField = findOrCreateHiddenField();
		if (box.dnoi_internal.isAuthenticated()) {
			// stick the result in a hidden field so the RP can verify it
			hiddenField.setAttribute("value", window.dnoa_internal.discoveryResults[box.value].successAuthData);
		} else {
			hiddenField.setAttribute("value", '');
			if (box.dnoi_internal.isBusy()) {
				alert(loginInProgressMessage);
			} else {
				if (box.value.length > 0) {
					// submitPending will be true if we've already tried deferring submit for a login,
					// in which case we just want to display a box to the user.
					if (box.dnoi_internal.submitPending || !box.dnoi_internal.canAttemptLogin()) {
						alert(identifierRequiredMessage);
					} else {
						// The user hasn't clicked "Login" yet.  We'll click login for him,
						// after leaving a note for ourselves to automatically click submit
						// when login is complete.
						box.dnoi_internal.submitPending = box.dnoi_internal.submitButtonJustClicked;
						if (box.dnoi_internal.submitPending === null) {
							box.dnoi_internal.submitPending = true;
						}
						box.dnoi_internal.loginButton.onclick();
						return false; // abort submit for now
					}
				} else {
					return true;
				}
			}
			return false;
		}
		return true;
	};

	/// <summary>
	/// Records which submit button caused this openid box to question whether it
	/// was ready to submit the user's identifier so that that button can be re-invoked
	/// automatically after authentication completes.
	/// </summary>
	box.dnoi_internal.setLastSubmitButtonClicked = function(evt) {
		var button;
		if (evt.target) {
			button = evt.target;
		} else {
			button = evt.srcElement;
		}

		box.dnoi_internal.submitButtonJustClicked = button;
	};

	// Find all submit buttons and hook their click events so that we can validate
	// whether we are ready for the user to postback.
	var inputs = document.getElementsByTagName('input');
	for (var i = 0; i < inputs.length; i++) {
		var el = inputs[i];
		if (el.type == 'submit') {
			if (el.attachEvent) {
				el.attachEvent("onclick", box.dnoi_internal.setLastSubmitButtonClicked);
			} else {
				el.addEventListener("click", box.dnoi_internal.setLastSubmitButtonClicked, true);
			}
		}
	}

	/// <summary>
	/// Returns the URL of the authenticating OP's logo so it can be displayed to the user.
	/// </summary>
	/// <param name="opUri">The OP Endpoint, if known.</param>
	box.dnoi_internal.deriveOPFavIcon = function(opUri) {
		if (!opUri) {
			var idresults = box.dnoi_internal.getUserSuppliedIdentifierResults();
			var response = idresults ? idresults.successAuthData : null;
			if (!response || response.length === 0) {
				trace('No favicon because no successAuthData.');
				return;
			}
			var authResult = new window.dnoa_internal.Uri(response);
			if (authResult.getQueryArgValue("openid.op_endpoint")) {
				opUri = new window.dnoa_internal.Uri(authResult.getQueryArgValue("openid.op_endpoint"));
			} else if (authResult.getQueryArgValue("dnoa.op_endpoint")) {
				opUri = new window.dnoa_internal.Uri(authResult.getQueryArgValue("dnoa.op_endpoint"));
			} else if (authResult.getQueryArgValue("openid.user_setup_url")) {
				opUri = new window.dnoa_internal.Uri(authResult.getQueryArgValue("openid.user_setup_url"));
			} else {
				return null;
			}
		}
		var favicon = opUri.getAuthority() + "/favicon.ico";
		trace('Guessing favicon location of: ' + favicon);
		return favicon;
	};

	/*****************************************
	* Event Handlers
	*****************************************/

	window.dnoa_internal.addDiscoveryStarted(function(identifier) {
		if (identifier == box.value) {
			box.dnoi_internal.setVisualCue('discovering');
		}
	}, box);

	window.dnoa_internal.addDiscoverySuccess(function(identifier, discoveryResult, state) {
		if (identifier == box.value && (box.dnoi_internal.state == 'discovering' || !box.dnoi_internal.state)) {
			// Start pre-fetching the OP favicons
			for (var i = 0; i < discoveryResult.length; i++) {
				var favicon = box.dnoi_internal.deriveOPFavIcon(discoveryResult[i].endpoint);
				if (favicon) {
					trace('Prefetching ' + favicon);
					box.dnoi_internal.prefetchImage(favicon);
				}
			}
			if (discoveryResult.length > 0) {
				discoveryResult.loginBackground(
				box.dnoi_internal.authenticationIFrames,
				null,
				null,
				null,
				box.timeout);
			} else {
				// discovery completed successfully -- it just didn't yield any service endpoints.
				box.dnoi_internal.setVisualCue('failednoretry', null, null, null, discoveryResult.error);
				if (discoveryResult.error) { box.title = discoveryResult.error; }
			}
		}
	}, box);

	window.dnoa_internal.addDiscoveryFailed(function(identifier, message) {
		if (identifier == box.value) {
			box.dnoi_internal.setVisualCue('failed');
			if (message) { box.title = message; }
		}
	}, box);

	window.dnoa_internal.addAuthStarted(function(discoveryResult, serviceEndpoint, state) {
		if (discoveryResult.userSuppliedIdentifier == box.value) {
			box.dnoi_internal.setVisualCue('discovering');
		}
	}, box);

	window.dnoa_internal.addAuthSuccess(function(discoveryResult, serviceEndpoint, extensionResponses, state) {
		if (discoveryResult.userSuppliedIdentifier == box.value) {
			// visual cue that auth was successful
			var parsedPositiveAssertion = new window.dnoa_internal.PositiveAssertion(discoveryResult.successAuthData);
			box.dnoi_internal.claimedIdentifier = parsedPositiveAssertion.claimedIdentifier;

			// If the OP doesn't support delegation, "correct" the identifier the user entered
			// so he realizes his identity didn't stick.  But don't change out OP Identifiers.
			if (discoveryResult.claimedIdentifier && discoveryResult.claimedIdentifier != parsedPositiveAssertion.claimedIdentifier) {
				box.value = parsedPositiveAssertion.claimedIdentifier;
				box.lastDiscoveredIdentifier = box.value;

				// Also inject a fake discovery result for this new identifier to keep the UI from performing
				// discovery on the new identifier (the RP will perform the necessary verification server-side).
				if (!window.dnoa_internal.discoveryResults[box.value]) {
					// We must make sure that the only service endpoint from the earlier discovery that
					// is copied over is the one that sent the assertion just now. Deep clone, then strip
					// out the other SEPs.
					window.dnoa_internal.discoveryResults[box.value] = discoveryResult.cloneWithOneServiceEndpoint(serviceEndpoint);
				}
			}
			box.dnoi_internal.setVisualCue('authenticated', parsedPositiveAssertion.endpoint, parsedPositiveAssertion.claimedIdentifier);
			if (box.dnoi_internal.onauthenticated) {
				box.dnoi_internal.onauthenticated(box, extensionResponses);
			}

			if (showLoginPostBackButton && !state.background) {
				box.dnoi_internal.postback(discoveryResult, serviceEndpoint, extensionResponses, state);
			} else if (box.dnoi_internal.submitPending) {
				// We submit the form BEFORE resetting the submitPending so
				// the submit handler knows we've already tried this route.
				if (box.dnoi_internal.submitPending === true) {
					box.parentForm.submit();
				} else {
					box.dnoi_internal.submitPending.click();
				}

				box.dnoi_internal.submitPending = null;
			} else if (!state.deserialized && autoPostback) {
				// as long as this is a fresh auth response, postback to the server if configured to do so.
				box.dnoi_internal.postback(discoveryResult, serviceEndpoint, extensionResponses, state);
			}
		}
	}, box);

	window.dnoa_internal.addAuthFailed(function(discoveryResult, serviceEndpoint, state) {
		if (discoveryResult.userSuppliedIdentifier == box.value) {
			box.dnoi_internal.submitPending = null;
			if (!serviceEndpoint || !state.background) { // if the last service endpoint just turned the user down
				box.dnoi_internal.displayLoginButton(discoveryResult);
			}
		}
	}, box);

	window.dnoa_internal.addAuthCleared(function(discoveryResult, serviceEndpoint) {
		if (discoveryResult.userSuppliedIdentifier == box.value) {
			if (!discoveryResult.findSuccessfulRequest()) {
				// attempt to renew the positive assertion.
				discoveryResult.loginBackground(
					box.dnoi_internal.authenticationIFrames,
					null,
					null,
					null,
					box.timeout);
			}
		}
	}, box);

	/*****************************************
	* Flow
	*****************************************/

	box.dnoi_internal.displayLoginButton = function(discoveryResult) {
		trace('No asynchronous authentication attempt is in progress.  Display setup view.');
		var providers = [];
		for (var i = 0; i < discoveryResult.length; i++) {
			var favicon = box.dnoi_internal.deriveOPFavIcon(discoveryResult[i].endpoint);
			var img = '<img src="' + favicon + '" />';
			providers.push({ text: img + discoveryResult[i].host, value: discoveryResult[i] });
		}

		// visual cue that auth failed
		box.dnoi_internal.setVisualCue('setup', null, null, providers);
	};

	/// <summary>Called to initiate discovery on some identifier.</summary>
	box.dnoi_internal.performDiscovery = function() {
		box.dnoi_internal.authenticationIFrames.closeFrames();
		box.lastDiscoveredIdentifier = box.value;
		var openid = new window.OpenIdIdentifier(box.value);
		openid.discover();
	};

	box.onblur = function(event) {
		if (box.lastDiscoveredIdentifier != box.value || !box.dnoi_internal.state) {
			if (box.value.length > 0) {
				box.dnoi_internal.resetAndDiscover();
			} else {
				box.dnoi_internal.setVisualCue();
			}
		}

		return true;
	};

	//{
		var rate = NaN;
		var lastValue = box.value;
		var keyPresses = 0;
		var startTime = null;
		var lastKeyPress = null;
		var discoveryTimer;

		function cancelTimer() {
			if (discoveryTimer) {
				trace('canceling timer', 'gray');
				clearTimeout(discoveryTimer);
				discoveryTimer = null;
			}
		}

		function identifierSanityCheck(id) {
			return id.match("^[=@+$!(].+|.*?\\..*[^\\.]|\\w+://.+");
		}

		function discover() {
			cancelTimer();
			trace('typist discovery candidate', 'gray');
			if (identifierSanityCheck(box.value)) {
				trace('typist discovery begun', 'gray');
				box.dnoi_internal.performDiscovery();
			} else {
				trace('typist discovery canceled due to incomplete identifier.', 'gray');
			}
		}

		function reset() {
			keyPresses = 0;
			startTime = null;
			rate = NaN;
			trace('resetting state', 'gray');
		}

		box.dnoi_internal.resetAndDiscover = function() {
			reset();
			discover();
		};

		box.onkeyup = function(e) {
			e = e || window.event; // for IE

			if (new Date() - lastKeyPress > 3000) {
				// the user seems to have altogether stopped typing,
				// so reset our typist speed detector.
				reset();
			}
			lastKeyPress = new Date();

			var newValue = box.value;
			if (e.keyCode == 13) {
				if (box.dnoi_internal.state === 'setup') {
					box.dnoi_internal.loginButton.click();
				} else if (box.dnoi_internal.postbackLoginButton) {
					box.dnoi_internal.postbackLoginButton.click();
				} else {
					discover();
				}
			} else {
				if (lastValue != newValue && newValue != box.lastDiscoveredIdentifier) {
					box.dnoi_internal.setVisualCue();
					if (newValue.length === 0) {
						reset();
					} else if (Math.abs((lastValue || '').length - newValue.length) > 1) {
						// One key press is responsible for multiple character changes.
						// The user may have pasted in his identifier in which case
						// we want to begin discovery immediately.
						trace(newValue + ': paste detected (old value ' + lastValue + ')', 'gray');
						discover();
					} else {
						keyPresses++;
						var timeout = 3000; // timeout to use if we don't have enough keying to figure out type rate
						if (startTime === null) {
							startTime = new Date();
						} else if (keyPresses > 1) {
							cancelTimer();
							rate = (new Date() - startTime) / keyPresses;
							var minTimeout = 300;
							var maxTimeout = 3000;
							var typistFactor = 5;
							timeout = Math.max(minTimeout, Math.min(rate * typistFactor, maxTimeout));
						}

						trace(newValue + ': setting timer for ' + timeout, 'gray');
						discoveryTimer = setTimeout(discover, timeout);
					}
				}
			}

			trace(newValue + ': updating lastValue', 'gray');
			lastValue = newValue;

			return true;
		};
	//}

	box.getClaimedIdentifier = function() { return box.dnoi_internal.claimedIdentifier; };

	// If an identifier is preset on the box, perform discovery on it, but only
	// if there isn't a prior authentication that we're about to deserialize.
	if (box.value.length > 0 && findOrCreateHiddenField().value.length === 0) {
		trace('jumpstarting discovery on ' + box.value + ' because it was preset.');
		box.dnoi_internal.performDiscovery();
	}
	
	// Restore a previously achieved state (from pre-postback) if it is given.
	window.dnoa_internal.deserializePreviousAuthentication(findOrCreateHiddenField().value);

	// public methods
	box.setValue = function(value) {
		box.value = value;
		if (box.value) {
			box.dnoi_internal.performDiscovery();
		}
	};

	// public events
	// box.onStateChanged(state)
}