//Fade constants.//
var userContentFadeOut = 800;
var userContentFadeIn = 1400;
var mainFadeImageDelay = 0;
var mainFadeImagePeriod = 2000;
var mainFadeTitleDelay = 500;
var mainFadeTitlePeriod = 1500;
var mainFadeContentDelay = 1500;
var mainFadeContentPeriod = 1000;

//Variables used to show/hide the top content and make the buttons along the bottom function.//
var selectedTextId;
var selectedImageId;
var selectedBlackTextImage;
var visibleContentBlock;

//Variables used by the login dialog.//
var isDisplayingLogin = false;

//Login information.//
var isLoggedIn = false;
var canDownloadPresentationBrief = false;
var userName = 0;

//
// Initializes the main view.
//
function init() {
	checkLogin(240000);
}

//
// Sends a ping to the server on a regular basis to prevent loss of the session and to check the logged in status of the user.
// Updates the logLink to display Log In or Log Out depending on the login state.
//    interval: The time increment between pings to the server, in milliseconds.
//
function checkLogin(interval) {
	var url = "/PingController.java";
	var httpRequest = null;
	
	if(window.XMLHttpRequest) {
		httpRequest = new XMLHttpRequest();
	}
	else if(window.ActiveXObject) {
		httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
	}
	else {
		return;
	}
	
	if(httpRequest != null) {
		httpRequest.onreadystatechange = function() {
			if(httpRequest.readyState == 4) {
				if((httpRequest.status == 200) || (httpRequest.status == 0)) {
					if(httpRequest.responseText != "" && !isLoggedIn) {
						document.getElementById("logLink").innerHTML = "Log Out";
						isLoggedIn = true;
						
						if(httpRequest.responseText != userName) {
							userName = httpRequest.responseText;
							document.getElementById("welcomeSpan").innerHTML = "Logged in as: " + userName;
						}
					}
					else if(httpRequest.responseText == "" && isLoggedIn) {
						document.getElementById("logLink").innerHTML = "Log In";
						document.getElementById("welcomeSpan").innerHTML = "";
						isLoggedIn = false;
					}
					
					if(interval > 0) {
						setTimeout("checkLogin('" + interval + "')", interval);
					}
				}
			}
		}
		httpRequest.open("POST",url,true);
		httpRequest.send(null);
	}
}

//
// Called by the login link at the top of the main page.
// Displays the login dialog.
//
function showLogin() {
	var loginDiv = document.getElementById('loginDiv');
	var changePasswordDiv = document.getElementById('changePasswordDiv');
	var resetPasswordDiv = document.getElementById('resetPasswordDiv');
	var resetPasswordSuccessDiv = document.getElementById('resetPasswordSuccessDiv');
	var emailNotValidatedDiv = document.getElementById('emailNotValidatedDiv');
	var validationEmailResentDiv = document.getElementById('validationEmailResentDiv');
	var errorTextControl = document.getElementById("errorText");
	
	loginDiv.style.display = 'block';
	loginDiv.style.visibility = 'visible';
	changePasswordDiv.style.display = 'none';
	changePasswordDiv.style.visibility = 'hidden';
	resetPasswordDiv.style.display = 'none';
	resetPasswordDiv.style.visibility = 'hidden';
	resetPasswordSuccessDiv.style.display = 'none';
	resetPasswordSuccessDiv.style.visibility = 'hidden';
	emailNotValidatedDiv.style.display = 'none';
	emailNotValidatedDiv.style.visibility = 'hidden';
	validationEmailResentDiv.style.display = 'none';
	validationEmailResentDiv.style.visibility = 'hidden';
	
	displayDialog("dialogBackground", "loginDialog");
	
	var focusComponent = document.getElementById("userNameInput");
	
	if(focusComponent != null) {
		focusComponent.focus();
		
		if(focusComponent.type != null && focusComponent.type == "text") {
			focusComponent.select();
		}
	}
	
	if(errorTextControl) {
		errorTextControl.innerHTML = "";
		errorTextControl.style.visibility = "hidden";
		errorTextControl.style.display = "block";
	}
}

//
// Switches between visible components.
//     fromComponentId: The component ID that will become invisible.
//     toComponentId: The component ID that will become visible.
//     focusComponentId: The component ID that will gain focus.
//	   fade: Whether a fade should occur.  This should be non-null if true.
function switchComponents(fromComponentId, toComponentId, focusComponentId, fade) {
	var errorText = document.getElementById("errorText");
    
	if(errorText) {
		errorText.innerHTML = "";
		errorText.style.visibility = "hidden";
	}
	
	replaceFade(fromComponentId, fade ? userContentFadeOut : 0, 5, toComponentId, fade ? userContentFadeIn : 0, 5, focusComponentId);
}

//
// Called by the mouse over and out functions of the images and text associated with the main menu items.
//
function mainMenuRollover(textImageId, imageUrl) {
	if(selectedTextId != textImageId) {
		document.getElementById(textImageId).src = imageUrl;
	}//if//
}//mainMenuRollover()//

//
// Opens terms of use for the site.
//
function openTermsOfUse() {
    var w = window.open('/legal/TermsOfUse.txt', 'Terms of Use', 'width=800,height=700,status,scrollbars,resizable');
    w.focus();
}

//
// Opens privacy policy for the site.
//
function openPrivacyPolicy() {
    var w = window.open('/legal/PrivacyPolicy.txt', 'Privacy Policy', 'width=800,height=700,status,scrollbars,resizable');
    w.focus();
}

//
// Opens a window to send a message to the company.
//
function contactUsClicked() {
	var w = window.open('/secure/ContactUsViewController.java', 'ContactUsEditor', 'width=800,height=700,status,scrollbars,resizable');
    w.focus();
}

//
// Sets the error text element.  The error text element is currently only used by the login view portion.
//
function setErrorText(errorText) {
	var errorTextControl = document.getElementById("errorText");
	
	if(errorTextControl) {
		errorTextControl.innerHTML = errorText;
		errorTextControl.style.visibility = "visible";
	}
}

//
// Clears the error text element.  The error text element is currently only used by the login view portion.
//
function clearErrorText() {
	var errorTextControl = document.getElementById("errorText");
	
	if(errorTextControl) {
		errorTextControl.innerHTML = "";
		errorTextControl.style.visibility = "hidden";
	}
}

//
// Sends the login form data to the server.
//
function sendLoginForm(form, successPathName) {
	var changePassword = form.changePasswordCheckbox && form.changePasswordCheckbox.checked;
	var anonymous = form.anonymousLoginCheckbox && form.anonymousLoginCheckbox.checked;
	
	if(!successPathName) {
		successPathName = "/secure/authenticated/index.html";
	}
	
	if(anonymous || validateLoginForm(form)) {
		var login = form.userNameInput.value;
		var password = form.userPasswordInput.value;
		
		sendLoginData(login, password, changePassword anonymous, successPathName);
	}
}

//
// Sends the login data to the server.
//
function sendLoginData(login, password, changePassword, anonymous, successPathName) {
	var url;
	var request = null;
	
	if(!successPathName) {
		successPathName = "/secure/authenticated/index.html";
	}
	
	if(anonymous) {
		url = "/secure/LoginController.java?login=" + encodeURIComponent("anonymous");
	}
	else {
		url = "/secure/LoginController.java?login=" + encodeURIComponent(login) + "&password=" + encodeURIComponent(password) + "&changePassword=" + encodeURIComponent(changePassword ? "true" : "false");
	}
	
	if(window.XMLHttpRequest) {
		request = new XMLHttpRequest();
	}
	else if(window.ActiveXObject) {
		request = new ActiveXObject("Microsoft.XMLHTTP");
	}
	else {
		return;
	}
	
	if(request != null) {
		request.open("POST", url, false);
		request.send(null);
		
		if((request.status == 200) || (request.status == 0)) {
			if(request.responseText.indexOf("success") == 0) {
				//Load the logged in page.//
				location.pathname = successPathName;
			}
			else if(request.responseText.indexOf("change-password") == 0) {
				switchComponents('loginDiv', 'changePasswordDiv', 'newPasswordInput');
				document.getElementById('oldPasswordHiddenInput').value = password;
				document.getElementById('userLoginHiddenInput').value = login;
			}
			else if(request.responseText.indexOf("email-not-validated") == 0) {
				switchComponents('loginDiv', 'emailNotValidatedDiv', 'userEmailAddressInput');
				//The response text will be followed by the user id and then the user's email address separated by colons.//
				document.getElementById("revalidateEmailForm").userIdInput.value = request.responseText.substring(request.responseText.indexOf(":") + 1, request.responseText.lastIndexOf(":"));
				document.getElementById("revalidateEmailForm").userEmailAddressInput.value = request.responseText.substring(request.responseText.lastIndexOf(":") + 1, request.responseText.length);
				clearErrorText();
			}
			else {
				//Unexpected: For now just show a bad login.//
				if(anonymous) {
					setErrorText("Anonymous login failed for an unknown reason.");
				}
				else {
					setErrorText("Invalid login name or password.");
				}
			}
		}
		else {
			//Show the error text to the user: bad login.//
			if(anonymous) {
				setErrorText("Anonymous login failed for an unknown reason.");
			}
			else {
				setErrorText("Invalid login name or password.");
			}
		}
	}
}

//
// Validates the login form.
//
function validateLoginForm(form) {
	var login = form.login.value;
	var password = form.password.value;
	var errorText = document.getElementById("errorText");
	
	if(login == null) {
		setErrorText("A login and password must first be provided.");
		return false;
	}
	else if(login.toLowerCase() == "anonymous") {
		setErrorText("Anonymous is not a valid login name.");
		return false;
	}
	else {
		return true;
	}
}

//
// Sends the change password form data to the server.
//
function sendChangePasswordForm(form, successPathName) {
	var login = form.userLoginHiddenInput.value;
	var oldPassword = form.oldPasswordHiddenInput.value;
	var newPassword = form.newPasswordInput.value;
	var url = "/secure/LoginController.java?login=" + encodeURIComponent(login) + "&password=" + encodeURIComponent(oldPassword) + "&newPassword=" + encodeURIComponent(newPassword);
	var request = null;
	var isNewPasswordValid = newPassword != null && newPassword.length >= 4;
	
	if(!successPathName) {
		successPathName = "/secure/authenticated/index.html";
	}
	
	if(!isNewPasswordValid) {
		setErrorText("The password must be a minimum of 4 characters long.");
	}
	else {
		if(window.XMLHttpRequest) {
			request = new XMLHttpRequest();
		}
		else if(window.ActiveXObject) {
			request = new ActiveXObject("Microsoft.XMLHTTP");
		}
		else {
			return;
		}
		
		if(request != null) {
			request.open("POST", url, false);
			request.send(null);
			
			if((request.status == 200) || (request.status == 0)) {
				if(request.responseText == "success") {
					//Load the logged in page.//
					location.href = successPathName;
				}
				else if(request.responseText == "bad-password") {
					setErrorText("The password must be a minimum of 4 characters long.");
				}
				else if(request.responseText.indexOf("email-not-validated") == 0) {
					switchComponents('loginDiv', 'emailNotValidatedDiv', 'userEmailAddressInput');
					//The response text will be followed by the user id and then the user's email address separated by colons.//
					document.getElementById("userIdInput").value=request.responseText.substring(request.responseText.indexOf(":") + 1, request.responseText.lastIndexOf(":"));
					document.getElementById("userEmailAddressInput").value=request.responseText.substring(request.responseText.lastIndexOf(":") + 1, request.responseText.length);
					clearErrorText();
				}
				else {
					//Unexpected: For now just show a bad login.//
					setErrorText("Invalid login name or password.");
				}
			}
			else {
				//Show the error text to the user: bad login.//
				setErrorText("Invalid login name or password.");
			}
		}
	}
}

//
// Sends the reset password form data to the server.
//
function sendResetPasswordForm(form) {
	if(validateResetPasswordForm(form)) {
		var login = form.resetPasswordUserNameInput.value;
		var email = form.resetPasswordEmailInput.value;
		var url = "/secure/ResetPasswordController.java?login=" + encodeURIComponent(login) + "&email=" + encodeURIComponent(email);
		var request = null;
		
		if(window.XMLHttpRequest) {
			request = new XMLHttpRequest();
		}
		else if(window.ActiveXObject) {
			request = new ActiveXObject("Microsoft.XMLHTTP");
		}
		else {
			return;
		}
		
		if(request != null) {
			request.open("POST", url, false);
			request.send(null);
			
			if((request.status == 200) || (request.status == 0)) {
				if(request.responseText == "success") {
					switchComponents('resetPasswordDiv', 'resetPasswordSuccessDiv', null);
				}
				else if(request.responseText.indexOf("bad-email") == 0) {
					setErrorText("Invalid email name.");
				}
				else if(request.responseText.indexOf("bad-login") == 0) {
					setErrorText("Invalid login address.");
				}
				else {
					//Unexpected: For now just show a bad data msg.//
					setErrorText("Invalid login name or email address.");
				}
			}
			else {
				//Show the error text to the user: bad data.//
				setErrorText("Invalid login name or email address.");
			}
		}
	}
}

//
// Validates the reset password form.
//
function validateResetPasswordForm(form) {
	return true;
}

//
// Requests a reminder email be sent to the address containing the user's login name.
//
function emailLoginName(emailAddress) {
	var url = "/secure/EmailLoginNameController.java?email=" + emailAddress;
	var request;
	
	if(window.XMLHttpRequest) {
		request = new XMLHttpRequest();
	}
	else {
		request = new ActiveXObject("Microsoft.XMLHTTP");
	}
	
	if(request != null) {
		request.open("POST", url, false);
		request.send(null);
		setErrorText("An email will be sent shorty containing your login name.");
	}
}

//
// Sends the revalidate email request to the server.
//
function sendRevalidateEmailForm(form) {
	var email = form.userEmailAddressInput.value;
	var userId = form.userIdInput.value;
	var url;
	var request = null;
	
	if(email != null && email.length > 0) {
		var isEmailValid = validateNewUserEmail(email, false) == 0;
		
		if(isEmailValid) {
			clearErrorText();
			url = "/secure/RevalidateEmailController.java?id=" + encodeURIComponent(userId) + "&email=" + encodeURIComponent(email);
		}
		else {
			setErrorText("A valid email address is required to validate the account.");
		}
	}
	else {
		clearErrorText();
		url = "/secure/RevalidateEmailController.java?id=" + encodeURIComponent(userId);
	}
	
	if(url != null) {
		if(window.XMLHttpRequest) {
			request = new XMLHttpRequest();
		}
		else if(window.ActiveXObject) {
			request = new ActiveXObject("Microsoft.XMLHTTP");
		}
		else {
			return;
		}
		
		if(request != null) {
			request.onreadystatechange = function() {
				if(request.readyState == 4) {
					if((request.status == 200) || (request.status == 0)) {
						if(request.responseText == "success") {
							//Display the success message.//
							switchComponents('emailNotValidatedDiv', 'validationEmailResentDiv', null);
							clearErrorText();
						}
						else if(request.responseText == "failed") {
							//Display a message indicating that the server is unable to send email at the moment.//
							setErrorText("The server is having a problem sending email at the moment.  We appologize for the inconvience, please try again later.");
						}
						else {
							//Unexpected: For now just show a bad login.//
							setErrorText("The server is having a problem processing your request at this time.  We appologize for the inconvience, please try again later.");
						}
					}
					else {
						//Show the error text to the user: bad login.//
						setErrorText("The server is having a problem processing your request at this time.  We appologize for the inconvience, please try again later.");
					}
				}
			}
			request.open("POST", url, true);
			request.send(null);
		}
	}
}


//
//
//  BEGIN DIALOG CODE
//
//
var visibleDialog = null;
var visibleBackground = null;
var oldResizeHandler = null;
var dialogOffsetMetrics = null;
var dialogOffsetNumber = null;

//
// Displays the given dialog with the given background panel.
// backgroundId: The optional identifier for the background panel being used.
// dialogId: The non-optional identifier of the dialog being displayed.
// verticalOffset: The pixel offset from the top of the window to the top of the dialog.  This may be a percent, in which case it is the percent of the window not taken by the dialog that occurs between the dialog top and the window top.  Example: 10px, 10%.
//
function displayDialog(backgroundId, dialogId, verticalOffset) {
	var offsetRegex = /(\d+)(px|%)?/i;
	var regexResults = verticalOffset == null ? null : offsetRegex.exec(verticalOffset);
	
	if(regexResults != null) {
		dialogOffsetNumber = regexResults[1];
		dialogOffsetMetrics = regexResults[2];
	}
	else {
		dialogOffsetNumber = 33;
		dialogOffsetMetrics = "%";
	}
	
	hideDialog();
	visibleDialog = document.getElementById(dialogId);
	
	if(backgroundId != null) {
		visibleBackground = document.getElementById(backgroundId);
		visibleBackground.style.display = "block";
		visibleBackground.style.visibility = "visible";
	}
	else {
		visibleBackground = null;
	}
	
	//Make the dialog visible.//
	visibleDialog.style.display = "block";
	visibleDialog.style.visibility = "visible";
	//Size things.//
	oldResizeHandler = window.onresize;
	window.onresize = resizeWindow;
	resizeWindow();
}

function hideDialog() {
	if(visibleDialog) {
		if(visibleBackground) {
			visibleBackground.style.display = "none";
			visibleBackground.style.visibility = "hidden";
			visibleBackground = null;
		}
		
		visibleDialog.style.display = "none";
		visibleDialog.style.visibility = "hidden";
		visibleDialog = null;
		window.onresize = oldResizeHandler;
		oldResizeHandler = null;
	}
}

function resizeWindow() {
	if(visibleDialog) {
		var windowHeight = 0;
		var windowWidth = 0;
		
		if(navigator.appName.indexOf("Microsoft") != -1) {
			var htmlHeight = document.body.parentNode.clientHeight;
			
			windowHeight = htmlHeight < window.screen.height ? htmlHeight : window.screen.height; //document.body.offsetHeight;
			//alert("window height:" + windowHeight + "; html height:" + htmlHeight + "; offset height:" + document.body.offsetHeight);
			windowWidth = document.body.offsetWidth;
		}
		else {
			windowHeight = window.innerHeight;
			windowWidth = window.innerWidth;
		}
		
		//alert(windowHeight + " " + windowWidth + " " + visibleDialog.clientHeight + " " + visibleDialog.clientWidth);
		var boundingRect = visibleDialog.getBoundingClientRect();
		
		if(visibleBackground) {
			visibleBackground.style.top = 0;
			visibleBackground.style.left = 0;
			visibleBackground.style.bottom = windowHeight;
			visibleBackground.style.right = windowWidth;
			visibleBackground.style.height = windowHeight;
			visibleBackground.style.width = windowWidth;
		}
		
		if(dialogOffsetMetrics == "%") {
			visibleDialog.style.top = Math.round(((windowHeight - visibleDialog.clientHeight) / 100) * dialogOffsetNumber) + "px";
		}
		else {
			visibleDialog.style.top = dialogOffsetNumber;
		}
		
		//Always center on the horizontal axis.//
		visibleDialog.style.left = Math.round((windowWidth - visibleDialog.clientWidth) / 2) + "px";
	}
	
	if(oldResizeHandler) {
		oldResizeHandler();
	}
}
//
//
//  END DIALOG CODE
//
//