function showError(errorCode) {
	var msg;
	switch (errorCode) {
		case "INVALID_REQUEST":
			msg = '<span class="alert">There was a problem with the data provided.  Please try again.</span>';
			break;
		case "SERVER_ERROR":
			msg = '<span class="alert">We\'re sorry, but there was a problem connecting to the server.<br />Please try again later.</span>';
			break;
	}
	if (msg != null) {
		$('#errorMsg').html(msg).show('slow');
	}
}


function hideError() {
	$('#errorMsg').hide('fast');
}


// ----- Used for messaging display --------------------------

function showInitMsg() {
	$('#submitContainer').html('Initializing...').show();
}
function hideInitMsg() {
	$('#submitContainer').hide();
}

function showCountyLimitsMsg() {
	var msg = '<p>If your county of residence is not in the list above, we do not carry plan coverage in your area. ';
	msg += 'Please <a href="c-n/contactUs.php">contact us</a> for more information.</p><br>';
	$('#countyLimitsMsg').html(msg).fadeIn('fast');
}

function showSearchButton(url) {
	var btn = '<input type="image" src="images/findplans.gif" alt="Find Plans" class="submitBtn" />';
	$('#submitContainer').html(btn).fadeIn('fast');
	$('.submitBtn').click(function(event) {
			event.preventDefault();
			window.location=url;
	});
}




// ----- Build content for display, based on server return data ----------------------------

function buildStateList(stateData) {
	var results = '<option value="">Please select</option>\n';
	for (var i = 0; i < stateData.length; i++) {
		var state = stateData[i];
		results += '<option value="' + state.id + '">' + state.name + '</option>\n';
	}
	return results;
}


function buildCountyList(countyData) {
	var results = '<option value="">Please select</option>\n';
	for (var i = 0; i < countyData.length; i++) {
		var county = countyData[i];
		results += '<option value="' + county.group + '">' + county.name + '</option>\n';
	}
	return results;
}


$(document).ready(function(){
//	$('#locationSearch .planYear').bind('change', function(event) { 
//		event.preventDefault(); 
		
//		if ($(this).val() != "") {
			// Request states for this plan year.
			
			// Add loading message to 'states' dropdown.
			$('#locationSearch #state').html('<option value="">Loading...</option>');
		
			
//			var dataStr = 'req=states&planYear=' + $(this).val();
			var dataStr = 'req=states&planYear=2012';
			
			$.ajax({
				type: "POST",
				url: locCheckPath,			// NOTE: path set via php write
				data: dataStr,
				dataType: "json",
				success: function(data) {
					if (data.msg=="INVALID_REQUEST") {
						showError("INVALID_REQUEST");
						$('#locationSearch #state').html('<option value="">--</option>');
					} else if (data.msg=="STATE_LIST") {
						// Disable the year selector.
						$('#locationSearch .planYear').attr('disabled', true);
						// And build / display our state list.
						$('#locationSearch #state').html(buildStateList(data.states)).attr('disabled', false);
					}
					
					// hideSearching();
				},
				error: function() {
					// Remove the 'Loading' message from the state dropdown.
					$("#locationSearch #state option[value='']").remove();
					
					showError("SERVER_ERROR");
				}
			});
			
//		}
//	});
	
	
	$('#locationSearch #state').bind('change', function(event) { 
		event.preventDefault(); 
		
		if ($(this).val() != "") {
			// Request counties for this state.
			
			// Add loading message to 'counties' dropdown.
			$('#locationSearch #county').html('<option value="">Loading...</option>');
		
			var dataStr = 'req=counties&state=' + $(this).val();
			
			$.ajax({
				type: "POST",
				url: locCheckPath,			// NOTE: path set via php write
				data: dataStr,
				dataType: "json",
				success: function(data) {
					if (data.msg=="INVALID_REQUEST") {
						showError("INVALID_REQUEST");
						$('#locationSearch #county').html('<option value="">--</option>');
					} else if (data.msg=="COUNTY_LIST") {
						// Disable the state selector.
						$('#locationSearch #state').attr('disabled', true);
						// And build / display our state list.
						$('#locationSearch #county').html(buildCountyList(data.counties)).attr('disabled', false);
						// Also, let's show a message informing users that their county may
						// not be in the list.  
						showCountyLimitsMsg();
					}
					
					// hideSearching();
				},
				error: function() {
					// Remove the 'Loading' message from the county dropdown.
					$("#locationSearch #county option[value='']").remove();
					
					showError("SERVER_ERROR");
				}
			});
			
		}
	});
	
	
	$('#locationSearch #county').bind('change', function(event) { 
		event.preventDefault(); 
		
		if ($(this).val() != "") {
			// Send the value for the selected county (is the group name) to the server.
			
			// Add 'initializing' message (final step before allowing form submission).
			showInitMsg();
		
			var dataStr = 'req=group&group=' + $(this).val();
			
			$.ajax({
				type: "POST",
				url: locCheckPath,			// NOTE: path set via php write
				data: dataStr,
				dataType: "json",
				success: function(data) {
					if (data.msg=="INVALID_REQUEST") {
						showError("INVALID_REQUEST");
						hideInitMsg();
					} else if (data.msg=="AREA_URL") {
						// Remove the 'please select' item from the list
						// Prevents users from selecting this, after a valid choice has been made.
						$("#locationSearch #county option[value='']").remove();

						showSearchButton(data.url);
					}
				},
				error: function() {
					// Hide the button message.
					hideInitMsg();
					
					showError("SERVER_ERROR");
				}
			});
			
		}
	});
	
	
});