// JavaScript Document

// get querystring information from browser -- via Querystring.js
var q = new Querystring();
var vid = q.get("vid");
var mySort = q.get("sort");

var mySearch = "";
if (q.get("q") != null) {mySearch = q.get("q");}

var myPage = q.get("page");
var myCmd = q.get("cmd");
var myAction = q.get("action");
var myCategory = q.get("cat");
var returnURL = q.get("returnURL");

// global variable for plugin script page
var pluginURL = "http://www.ensemblevideo.com/plugin/v2/index.asp";
var pluginPath = "http://www.ensemblevideo.com/plugin/v2";

// eliminate null page value
if (myPage == null) {myPage = 1}

/* Response handler. Will inject a new div
* element into the body and insert the data
* which it assumes is text into the div.
*/ 
function myXjrResponseHandler(data) {
  	var myDiv = document.getElementById("vidShow")
  	myDiv.innerHTML = data ;
}

// functions to return the proper request url

function displayLogin(web_id, categories, showcase) {
	return pluginURL + "?webid=" + web_id + "&cmd=login&returnURL=" + returnURL + "&categories=" + categories + "&showcase=" + showcase;	
}

function searchVideos(web_id, categories) {
	return pluginURL + "?webid=" + web_id + "&q=" + mySearch + "&sort=" + mySort + "&page=" + myPage + "&cmd=search&categories=" + categories;	
}

function searchVideoCategory(web_id, categories) {
	return  pluginURL + "?webid=" + web_id + "&q=" + mySearch + "&sort=" + mySort + "&page=" + myPage + "&cat=" + myCategory + "&categories=" + categories;	
}

function getVideoCategory(web_id, categories) {
	return pluginURL + "?webid=" + web_id + "&cat=" + myCategory + "&sort=" + mySort + "&page=" + myPage + "&categories=" + categories;  
}

function getMainPage(web_id, categories, showcase, orientation) {
	var url; 
	
	if (categories == 'true') {
		url = pluginURL + "?webid=" + web_id + "&categories=true&orientation=" + orientation;  
		
		if (showcase == 'true') {
			url = pluginURL + "?webid=" + web_id + "&categories=true&showcase=true&orientation=" + orientation;  
		}	
	}
	else {
		url = searchVideos(web_id, categories);	
	}

	return url;
}

function getVideoInfo(web_id, categories) {
	return pluginURL + "?webid=" + web_id + "&vid=" + vid + "&categories=" + categories;  
}

//function to determine which request url to use
function fetch(web_id, categories, showcase, orientation) {
	var url;
	url = getMainPage(web_id, categories, showcase, orientation);
		
	if (vid != null) {
		url = getVideoInfo(web_id, categories);
	}
	
	if (myCategory != null) {
		url = getVideoCategory(web_id, categories);
		
		if (mySearch != null) {
			url = searchVideoCategory(web_id, categories);
		}		
	}
		
	if (myCmd == 'search') {
		url = searchVideos(web_id, categories);
	}
	
	if (myCmd == 'login') {
		url = displayLogin(web_id, categories, showcase);
	}
	
	xjr.get(url);
}

// show loader graphic when request has not completed
function showLoader() { 
	var myDiv = document.getElementById("vidShow"); 
	myDiv.style.width = '100%';
	myDiv.innerHTML = '<center class=\'pluginWidth\'><img src=\'' + pluginPath + '/images/loading.gif\' border=\'0\' style=\'position:relative; top:150px;\' /></center>'; 
}

function doLogin(username, password, web_id, categories, showcase) {
	var url = pluginURL + "?uid=" + username + "&key=" + password + "&cmd=doLogin&webid=" + web_id + "&categories=" + categories + "&showcase=" + showcase;  
	xjr.get(url);
}

function doLogout() {
	var url = pluginURL + "?cmd=logout";  
	xjr.get(url);
	window.location = '?';
}

//NOT CURRENTLY USED -- use if there is a way to invoke...
function goToURL(url) {
	window.location = url;	
}

// function called from end-user HTML -- this does it all, BABY!
function doIt(web_id, categories, showcase, orientation) {
  showLoader()
  fetch(web_id, categories, showcase, orientation);
}

// links up the response to a handler function -- from bigllc-xjr.js
var xjr = com.bigllc.xjr.RequestDispatcher;
xjr.setResponseHandler(myXjrResponseHandler);