'use strict';
/* global location $ */

// Validate email addresses
function validateEmail(email) {
	var re = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
	return re.test(email);
}

// Replace inputed value with response
function replaceFromEndpoint(type, selector, cb) {
	$.get('/validate?'+type+'='+$(selector).val())
	.done(function(data){
		$(selector).val(data);
		cb();
	});
}

// On page load
$(function(){
	var slugNotUnique, emailNotUnique;
	
	// Set timezone in password change link
	$('#password').attr('href',"/settings/password?tz="+new Date().getTimezoneOffset());
		
	// Delete account
	$('#delete').click(function(){
		if (confirm("Are you sure you want to delete your account?  This CANNOT be undone! ")) {
			window.location.href = "/settings/delete";
		}
	});
	
	function validateForm(input) {
		
		// Perform basic check, then validate uniqueness
		basicCheck(function(){ validateUniqueness(input); });
		
		function basicCheck(cb){
			var checkedCount = 0;
			
			// Check slug
			if (!$('#slug-input').val()){
				$('#slug-help').show().text("A slug is required. ");
				$('#submit-group .main').prop('disabled',true).prop('title',"You need to enter a slug. ");
				if (checkedCount>0) {cb();} else {checkedCount++;}
			}
			else {
				if (!slugNotUnique){ $('#slug-help').hide(); }
				if (checkedCount>0) {cb();} else {checkedCount++;}
			}
		
			// Check email
			if (!$('#email-input').val()){
				$('#email-help').show().text("An email is required. ");
				$('#submit-group .main').prop('disabled',true).prop('title',"You need to enter an email address. ");
				if (checkedCount>0) {cb();} else {checkedCount++;}
			}
			else if (!validateEmail($('#email-input').val())) {
				$('#email-help').show().text("You must enter a valid email address. ");
				$('#submit-group .main').prop('disabled',true).prop('title',"You need to enter a valid email address. ");
				if (checkedCount>0) {cb();} else {checkedCount++;}
			}
			else {
				if (!emailNotUnique){ $('#email-help').hide(); }
				if (checkedCount>0) {cb();} else {checkedCount++;}
			}
		}
		
		function validateUniqueness(input){
			
			function recheckBasic(){
				if ($('#email-help').is(":visible") && $('#email-help').text().substring(0,25)!=="Unable to confirm unique ") {
					$('#submit-group .main').prop('disabled',true).prop('title',"You need to supply a different email address. ");
				}
				else if ($('#slug-help').is(":visible") && $('#slug-help').text().substring(0,25)!=="Unable to confirm unique ") {
					$('#submit-group .main').prop('disabled',true).prop('title',"You need to supply a different slug. ");
				}
				else if ( $('#slug-help').text().substring(0,25)==="Unable to confirm unique " ) {
					$('#submit-group .main').prop('title',"Unable to confirm unique slug with the server. This might not work... ");
				}
				else if ( $('#email-help').text().substring(0,25)==="Unable to confirm unique " ) {
					$('#submit-group .main').prop('title',"Unable to confirm unique email with the server. This might not work... ");
				}
				else {
					$('#submit-group .main').prop('disabled',false).prop('title',"Click here to save your changes. ");
				}
			}
			
			// Should server be queried for unique values?
			if (input && $('#'+input+'-input').val()) {
			if (input==='email' && !validateEmail($('#email-input').val())) {}
			
			// Query server for unique values
			else {
				$.ajax({
					url: '/validate?'+input+'='+$('#'+input+'-input').val(),
					type: 'GET',
					statusCode: {
						
						// Is unique
						200: function(){
							$('#'+input+'-help').hide();
							if (input==='slug'){ slugNotUnique=false; }
							else if (input==='email'){ emailNotUnique=false; }
							recheckBasic();
						},
						
						// Isn't unique
						400: function(){
							if (input==='slug'){ slugNotUnique=true; }
							else if (input==='email'){ emailNotUnique=true; }
							$('#'+input+'-help').show().text("That "+input+" is already in use by another user. ");
							$('#submit-group .main').prop('disabled',true).prop('title',"You need to supply a different "+input+". ");
						}
						
					} })
					
				// Server error
				.error( function(){
					if (input==='slug'){ slugNotUnique=undefined; }
					else if (input==='email'){ emailNotUnique=undefined; }
					$('#'+input+'-help').show().text("Unable to confirm unique "+input+".  This might not work... ");
					recheckBasic();
				});
					
			} }
			
			// Nothing changed.  Recheck basic validations
			else { recheckBasic(); }
			
		}
		
	}
	
	// Input change listeners
	$('#slug-input').change(function(){
		if (!$('#slug-input').val()){
			$('#slug-help').show().text("A slug is required. ");
			$('#submit-group .main').prop('disabled',true).prop('title',"You need to enter a slug. ");
		}
		else {
			$('#slug-help').hide();
			replaceFromEndpoint('slugify','#slug-input',function(){
				validateForm('slug');
			});
		}
	});
	$('#email-input').change(function(){
		validateForm('email');
	});
	$('#name-input').change(function(){
		replaceFromEndpoint('xss','#name-input',validateForm);
	});
	
});