// you need to define javascript variables in your base jsp, which value is dynamic generated
// shopRestAirport - airport for the portlet

// when terminal changed, call method terminalChanged
//      shoplocation changed, call method shopLocationChanged
//      category changed, call method categoryChanged

//
// call chain: updateShopLocations --> updateShopLocationsResult --> 
//             updateCategories --> updateCategoriesResult -->
//             updateShops --> updateShopsResult
//


function terminalChanged(targetForm) {
	shopRestAjaxSearchForm = targetForm;
	var terminalValue = shopRestAirport;
	if(shopRestAjaxSearchForm.terminal)
	{
		terminalValue = shopRestAjaxSearchForm.terminal.value;
	}
	updateShopLocations(shopRestAirport, terminalValue);
}

function shopLocationChanged(targetForm) {
	shopRestAjaxSearchForm = targetForm;
	var terminalValue = shopRestAirport;
	if(shopRestAjaxSearchForm.terminal)
	{
		terminalValue = shopRestAjaxSearchForm.terminal.value;
	}
	updateCategories(shopRestAjaxSearchForm.shoptype.value, shopRestAirport, terminalValue, shopRestAjaxSearchForm.shoplocation.value);
}

function categoryChanged(targetForm) {
	shopRestAjaxSearchForm = targetForm;
	var terminalValue = shopRestAirport;
	if(shopRestAjaxSearchForm.terminal)
	{
		terminalValue = shopRestAjaxSearchForm.terminal.value;
	}
	updateShops(shopRestAjaxSearchForm.shoptype.value, shopRestAirport, terminalValue, shopRestAjaxSearchForm.shoplocation.value, shopRestAjaxSearchForm.category.value);    		
}

var shopRestAjaxshopRestAjaxSearchForm;

var shopRestLocation = 'All';
function updateShopLocations(airport, terminal) {
	dwr.engine.setHttpMethod("GET");
	shopRestLocation = dwr.util.getValue(shopRestAjaxSearchForm.shoplocation);
	shopRestAjaxSearchForm.shoplocation.disabled = true;
	shopRestAjaxSearchForm.category.disabled = true;
	shopRestAjaxSearchForm.shop.disabled = true;
	AjaxShopRestSearchHelper.getLocations(airport, terminal, updateShopLocationsResult);
}

function updateShopLocationsResult(locationList) {
	shopRestAjaxSearchForm.shoplocation.disabled = false;
	dwr.util.removeAllOptions(shopRestAjaxSearchForm.shoplocation);
	dwr.util.addOptions(shopRestAjaxSearchForm.shoplocation, [ { name:"Choose a location", value:"All" } ], 'value', 'name');
	dwr.util.addOptions(shopRestAjaxSearchForm.shoplocation, locationList, 'location');
	dwr.util.setValue(shopRestAjaxSearchForm.shoplocation,shopRestLocation);
	var terminalValue = shopRestAirport;
	if(shopRestAjaxSearchForm.terminal)
	{
		terminalValue = shopRestAjaxSearchForm.terminal.value;
	}
	updateCategories(shopRestAjaxSearchForm.shoptype.value, shopRestAirport, terminalValue, shopRestAjaxSearchForm.shoplocation.value);
	
}

var shopRestCategory = '';
function updateCategories(shoptype, airport, terminal, shoplocation) {
	dwr.engine.setHttpMethod("GET");
	shopRestCategory = dwr.util.getValue(shopRestAjaxSearchForm.category);
	shopRestAjaxSearchForm.category.disabled = true;
	shopRestAjaxSearchForm.shop.disabled = true;
	AjaxShopRestSearchHelper.getCategories(shoptype, airport, terminal, shoplocation, updateCategoriesResult);
}

function updateCategoriesResult(categoryList) {    	
	shopRestAjaxSearchForm.category.disabled = false;
	dwr.util.removeAllOptions(shopRestAjaxSearchForm.category);
	dwr.util.addOptions(shopRestAjaxSearchForm.category, [ { name:"Choose a category", value:"" } ], 'value', 'name');    	
	dwr.util.addOptions(shopRestAjaxSearchForm.category, categoryList, 'id', 'category');
	dwr.util.setValue(shopRestAjaxSearchForm.category,shopRestCategory);
	var terminalValue = shopRestAirport;
	if(shopRestAjaxSearchForm.terminal)
	{
		terminalValue = shopRestAjaxSearchForm.terminal.value;
	}
	updateShops(shopRestAjaxSearchForm.shoptype.value, shopRestAirport, terminalValue, shopRestAjaxSearchForm.shoplocation.value, shopRestAjaxSearchForm.category.value);
	
}

var shopRestShop = '';
function updateShops(shoptype, airport, terminal, shoplocation, category) {
	dwr.engine.setHttpMethod("GET");
	shopRestShop = dwr.util.getValue(shopRestAjaxSearchForm.shop);
	shopRestAjaxSearchForm.shop.disabled = true;
	AjaxShopRestSearchHelper.getShops(shoptype, airport, terminal, shoplocation, category, updateShopsResult);
}

function updateShopsResult(shopList) {
	shopRestAjaxSearchForm.shop.disabled = false;
	dwr.util.removeAllOptions(shopRestAjaxSearchForm.shop);
	dwr.util.addOptions(shopRestAjaxSearchForm.shop, [ { name:getShopRestChoosePhrase(), value:"" } ], 'value', 'name');
	dwr.util.addOptions(shopRestAjaxSearchForm.shop, shopList, 'name');
	dwr.util.setValue(shopRestAjaxSearchForm.shop,shopRestShop);
}

function getShopRestChoosePhrase() {
	if( shopRestAjaxSearchForm.shoptype.value == 'Shop') {
		return 'Choose a shop';
	}
	else {
		return 'Choose a restaurant/bar';
	}
}