var APIPATH = getSitePath() + "api/";
var FORMSPATH = getSitePath() + "forms/";

// Returns the base URL of the website, assuming that this script is in the '/js' subdirectory of the site.
function getSitePath() {
    var scripts = document.getElementsByTagName('script'),
        script = scripts[scripts.length - 1];

    if (script.getAttribute.length !== undefined) {
		scriptPath = script.src;
    }

    scriptPath = script.getAttribute('src', -1);
	
	var basePath = scriptPath.substr(0, scriptPath.lastIndexOf( '/js' )+1 );
	return basePath;
}

function getTemplateAjax(path) {
	var source;
	var template;
	$.ajax({
		url: path, //ex. js/templates/mytemplate.handlebars
		async: false,  
		success: function(data) {
			source    = data;
			template  = Handlebars.compile(source);
		}               
	});
	return template;
}

function formatCurrency(val) {
	var s = val.toString();
	if (s.indexOf('.') == -1) s += '.';
	while (s.length < s.indexOf('.') + 3) s += '0';
	return s;
}

function formatPhone(num) {
	num = num.replace(/[^0-9]/, '', num); 
	var len = num.length;
	if(len == 7)
	num = num.replace(/([0-9]{3})([0-9]{4})/, '$1-$2');
	else if(len == 10)
	num = num.replace(/([0-9]{3})([0-9]{3})([0-9]{4})/, '($1) $2-$3');
	return num;
}

function isValidEmailAddress(emailAddress) {
    var pattern = new RegExp(/^(("[\w-\s]+")|([\w-]+(?:\.[\w-]+)*)|("[\w-\s]+")([\w-]+(?:\.[\w-]+)*))(@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$)|(@\[?((25[0-5]\.|2[0-4][0-9]\.|1[0-9]{2}\.|[0-9]{1,2}\.))((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\.){2}(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\]?$)/i);
    return pattern.test(emailAddress);
}

function isValidPhone(phone) {
	var pattern = new RegExp(/^[0-9\-\(\)\s]+/i);
	return pattern.test(phone);
}

function isValidDate(date) {
	var pattern = new RegExp(/^[0-9]{2}\/[0-9]{2}\/[0-9]{4}/i);
	return pattern.test(date);
}

function isValidTime(time) {
	var pattern = new RegExp(/^[0-9]{1,2}:[0-9]{2} [am|pm]/i);
	return pattern.test(time);
}

// Converts SQL datetime of the form YYYY-MM-DD HH:MM:SS into milliseconds
// Assumes we are using the datejs extension to Date
function sqlDateToMilliseconds(sqlDateStr) {
	sqlDateStr = sqlDateStr.replace(/ /g,"T");
	return Date.parse(sqlDateStr).getTime();
}

// Convert milliseconds into a Javascript date object
function millisecondsToDate(sqlDateStr) {
	var msTime = sqlDateToMilliseconds(sqlDateStr);
	var dateTime = new Date();
	dateTime.setTime(msTime);
	return dateTime;
}

function formatDate1(stamp) {
	var formatted = {};
	formatted['stamp'] = stamp;
	var dateTime = new Date(stamp);
	formatted['date'] = dateTime.toString("MMM dS, yyyy");
	formatted['day'] = dateTime.toString("dddd");
	formatted['time'] = dateTime.toString("h:mm tt");
	return formatted;
}

function toTitleCase(str) {
    if (str.match(/^[A-Z]*$/)) {
		return str;
	} else {
		return str.replace(/\w\S*/g, function(txt){return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();});
	}
}

// Get the value of a URI parameter from the current page by name.
function getParameterByName(name) {
    name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
    var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
        results = regex.exec(location.search);
    return results == null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
}

// Find an object in an array of objects that has the corresponding field value
function findObjectByField(arr, field_value, field_name){
	field_name = typeof field_name !== 'undefined' ? field_name : "id";
	var item = null;
	jQuery.each(arr, function (a,b){
		if (b[field_name] == field_value){
			item = b;
		}
	});
	return item;
}

function getKeys(obj) {
	var keys = [];
	$.each( obj, function( key, value ) {
		keys.push(key);
	});
	return keys;
}

// Create an old-fashion html style select dropdown with typeahead capability
function typeaheadDropdown(typeahead_element, suggestions, suggestion_render_template, options) {
	var default_id = false;
	var disabled = false;
	if (options['default_id'])
		default_id = options['default_id'];
	if (options['disabled'])
		disabled = options['disabled'];

	var template = Handlebars.compile(suggestion_render_template);
	// Enable item
	//jQuery.fn._typeahead.noConflict();
	// Test array: var colors = ["red", "blue", "green", "yellow", "brown", "black"];    
	$(typeahead_element).typeahead({
		//name: classLabel,     // Update 2/19/2014: remove name to keep typeahead from caching data
		minLength: 0,
		limit: 100,
        highlight: true,
		local: suggestions,
		template: template,
		engine: Handlebars
	}).on('typeahead:closed', function (object, datum) {
		// Check to make sure that the inputted value is in the list of values.  If so, set the hidden -id field to the corresponding id
		var found = false;
		jQuery.each(suggestions, function(idx, item) {
			// Match the item name against the suggestions list
			if (item['name'].toLowerCase() == $(typeahead_element).val().toLowerCase())
				found = item;
		});
		if (found ) {
			// Set the selected hidden id and trigger the "change" event
			var selected_id = found['id'];
			$(typeahead_element).data("selected_id", selected_id).trigger('change');
		} else {
			$(typeahead_element).typeahead('setQuery', "");
		}

	});

	// Set default value if specified
	if (default_id) {
		// Look for name
		var found = false;
		jQuery.each(suggestions, function(idx, item) {
			// Match the item name against the suggestions list
			if (item['id'] == default_id)
				found = item;
		});
		if (found ) {
			// Set the selected hidden id and trigger the "change" event
			var selected_id = found['id'];
			$(typeahead_element).typeahead('setQuery', found['name']);
			$(typeahead_element).data("selected_id", selected_id).trigger('change');
		} else {
			$(typeahead_element).typeahead('setQuery', "");
		}
	}
	// Disable if specified
	if (disabled) {
		$(typeahead_element).typeahead('destroy');
		$(typeahead_element).prop('disabled', true);
	}
}

function validateFormFields(dialog_id) {
	// Check all input fields
	var errorMessages = [];
	var $fields = $('#' + dialog_id + ' .form-control');
	$fields.each(function(idx, input) {
		// Get handle for closest input-group indicator
		var closestGroup = $( this ).closest('.input-group');
		// Skip disabled fields
		if ($(this).prop('disabled')) {
			console.log("Field " + $(this).prop("name") + "is disabled");
			return;  //this is equivalent of 'continue' for jQuery loop
		}
		// Get field value
		var val = "";
		// Check that radio box has one option selected
		if ($( this ).attr('type') == "radio") {
			var checkedOption = $('input[name="' + input.name + '"]' ).filter(':checked');
			if (checkedOption.length != 0)
				val = checkedOption.val();
			console.log(val);
		} else {
			val = input.value;
		}
		console.log("validating field: " + input.name + "='" + val + "'");		
		var fieldErrors = 0;
		// Get validation metadata
		var validationData = $(this).data('validate');
		if (validationData){
			// If no field label specified, use a generic label
			var label = "One of the fields";
			if (validationData.label) {
				label = validationData.label;
			}
			// Skip blank, optional fields
			if (!(validationData.optional && val == "")) {
				if (validationData.minLength && validationData.maxLength) {
					if (val.length < validationData.minLength || val.length > validationData.maxLength) {
						errorMessages.push("'" + label + "' must be between " + validationData.minLength + " and " + validationData.maxLength + " characters long.");
						fieldErrors += 1;
					}
				}
				if (validationData.minLength && !validationData.maxLength) {
					if (val.length < validationData.minLength) {
						errorMessages.push("'" + label + "' must be at least " + validationData.minLength + " characters long.");
						fieldErrors += 1;
					}
				}		
				if (!validationData.minLength && validationData.maxLength) {
					if (val.length > validationData.maxLength) {
						errorMessages.push("'" + label + "' must be at most " + validationData.maxLength + " characters long.");
						fieldErrors += 1;
					}
				}
				if (validationData.email) {
					if (!isValidEmailAddress(val)) {
						errorMessages.push("'" + label + "' must be a valid email address.");
						fieldErrors += 1;
					}
				}
				if (validationData.number) {
					if (isNaN(val) || val == "") {
						errorMessages.push("'" + label + "' must be a number.");
						fieldErrors += 1;
					}
				}
				if (validationData.phone) {
					if (!isValidPhone(val)) {
						errorMessages.push("'" + label + "' must be a valid phone number.");
						fieldErrors += 1;
					}
				}
				if (validationData.date) {
					if (!isValidDate(val)) {
						errorMessages.push("'" + label + "' must be a date in the format mm/dd/yyyy.");
						fieldErrors += 1;
					}
				}
				if (validationData.time) {
					if (!isValidTime(val)) {
						errorMessages.push("'" + label + "' must be a time in the format h:mm am or h:mm pm.");
						fieldErrors += 1;
					}
				}
				if (validationData.selected) {
					var msg = "You must select an option for '" + label + "'.";
					if (val == "") {
						if ($.inArray(msg, errorMessages) == -1) {
							errorMessages.push(msg);
						}
						fieldErrors += 1;
					}
				}
				if (validationData.passwordMatch) {
					var other = $('#' + dialog_id + ' input[name="' + validationData.passwordMatch + '"]');
					if (val != other.val()) {
						errorMessages.push("Passwords must match!");
						fieldErrors += 1;
					}
				}
			}
		}
		if (fieldErrors > 0) {
			closestGroup.addClass('has-error');
			closestGroup.removeClass('has-success');
		} else {
			closestGroup.removeClass('has-error');
			closestGroup.addClass('has-success');
		}		
	});
	//console.log(errorMessages);
	return errorMessages;
}

function loadCurrentUser() {
	var url = APIPATH + 'load_current_user.php';
	var result = $.ajax({  
	  type: "GET",  
	  url: url,
	  async: false
	}).responseText;	
	var resultJSON = processJSONResult(result);
	
	if (resultJSON['user_id']) {
		return resultJSON;
	} else {
		addAlert("danger", "We couldn't load your account. We'll try to get this fixed right away!");
		window.location.replace('logout.php');
		return;
	}
}

// Load permissions for the logged in user
function userLoadPermissions() {
	var url = APIPATH + 'load_groups.php';
	var result = $.ajax({  
	  type: "GET",  
	  url: url,
	  async: false,
	  data: {user_id: '0'}
	}).responseText;
	var resultJSON = processJSONResult(result);
	return resultJSON;
}

function loadAllGroups() {
	var url = APIPATH + 'load_groups.php';
	var result = $.ajax({  
	  type: "GET",  
	  url: url,
	  async: false,
	  data: {}
	}).responseText;
	var resultJSON = processJSONResult(result);
	return resultJSON;
}

function loadSecureFunctions() {
	var url = APIPATH + 'load_secure_functions.php';
	var result = $.ajax({  
	  type: "GET",  
	  url: url,
	  async: false,
	  data: {}
	}).responseText;
	var resultJSON = processJSONResult(result);
	return resultJSON;
}

function loadPermissionValidators() {
	var url = APIPATH + 'load_permission_validators.php';
	var result = $.ajax({  
	  type: "GET",  
	  url: url,
	  async: false,
	  data: {}
	}).responseText;
	var resultJSON = processJSONResult(result);
	return resultJSON;
}

function addAlert(type, msg) {
	var url = APIPATH + 'user_alerts.php';
	$.ajax({  
	  type: "POST",  
	  url: url,
	  async: false,
	  data: {
		type: type,
		message: msg
	  },		  
	  success: function() {
		//alert("Added alert successfully");
		// Do nothing.  What, you want an alert that your alert posted successfully?
	  }
	}); 
}

// Load alerts from $_SESSION['userAlerts'] variable into specified element
function alertWidget(widget_id){
	var url = APIPATH + 'user_alerts.php';
	$.getJSON( url, {})
	.done(function( data ) {
		var alertHTML = "";
		jQuery.each(data, function(alert_idx, alert_message) {
			if (alert_message['type'] == "success"){
				alertHTML += "<div class='alert alert-success'>" + alert_message['message'] + "</div>";
			} else if (alert_message['type'] == "warning"){
				alertHTML += "<div class='alert alert-warning'>" + alert_message['message'] + "</div>";
			} else 	if (alert_message['type'] == "info"){
				alertHTML += "<div class='alert alert-info'>" + alert_message['message'] + "</div>";
			} else if (alert_message['type'] == "danger"){
				alertHTML += "<div class='alert alert-danger'>" + alert_message['message'] + "</div>";
			}
		});	
		$('#' + widget_id).html(alertHTML);
		$("html, body").animate({ scrollTop: 0 }, "fast");		// Scroll back to top of page
	});
}

function processJSONResult(result) {
	if (!result) {
		addAlert("danger", "Oops, this feature doesn't seem to be working at the moment.  Totally our bad.");
		return {"errors": 1, "successes": 0};
	} else {
		try {
			if (typeof result == 'string') {
				return jQuery.parseJSON(result);
			} else {
				return result;
			}
		} catch (err) {
			console.log("Backend error: " + result);
			addAlert("danger", "Oops, looks like our server might have goofed.  If you're an admin, please check the PHP error logs.");
            return {"errors": 1, "successes": 0};
		}	
	}
}