function getComments() {
	uri = "http://localhost:8188/Service.svc/htmlcomments";
	var xhr = new XMLHttpRequest();
	xhr.open("GET", uri, true);
	xhr.onload = function () {
		var resp = (xhr.responseText);
		document.getElementById("addComments").innerHTML = xhr.responseText;
		}
	xhr.send(null);
}

function comment() {
	var Name = document.getElementById("name").value;
	var Feedback = document.getElementById("feedback").value;
	uri = "http://localhost:8188/Service.svc/comment?name=" + Name;
	var xhr = new XMLHttpRequest();
    xhr.open("POST", uri, true);
	xhr.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
	xhr.send(JSON.stringify(Feedback));

	getComments()
}

function buyBook(id) {
	window.location.href = "http://redsox.uoa.auckland.ac.nz/BC/Closed/Service.svc/bookbuy?id=" + id;
}

function buyBluray(id) {
	var uri = "http://redsox.uoa.auckland.ac.nz/BC/Closed/Service.svc/brbuy?id=" + id;
	window.location.href = uri;
}

function register() {
    var Password = document.getElementById("password").value;
	var Username = document.getElementById("username").value;
	var Address = document.getElementById("address").value;
	uri = "http://localhost:8188/Service.svc/register";
	var xhr = new XMLHttpRequest();
	xhr.onreadystatechange = function() {
        if (xhr.readyState == 4 && xhr.status == 200) {
            document.getElementById("signUp").innerHTML += xhr.responseText;
        }
    }
    xhr.open("POST", uri, true);
	xhr.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
	xhr.send(JSON.stringify({"Address":Address, "Name":Username, "Password":Password}));
}

function checkEnter(e) {
	if (e.keyCode == 13) booksOrBluray(document.getElementById('search').value);
}
function showBooks(dest) {
   var listContent = "";
   for (var i = 0; i < dest.length; ++i) {
	  var record = dest[i];
      var id = "" + record.Id;
	  var button = "<button class='right' type='button' onclick='window.location.href = \"http://redsox.uoa.auckland.ac.nz/BC/Closed/Service.svc/bookbuy?id=" + id + "\"'>Buy Now!</button>"
	  var img = "<img alt='Logo' src='http://localhost:8188/Service.svc/bookimg?id="
	  + record.Id + "' style='max-width: 200px; width: 100%; display: inline-block; vertical-align: middle;' />"
      listContent += "<tr><td>" + img + "</td><td class='mid'>" + record.Title +
	  "</td><td>" + button + "</td></tr>";
   }
   if (listContent == "") listContent += "<br>no results.<br>"
   document.getElementById("showTab").innerHTML = listContent;
}

function getBluray(uri) {
	uri = uri || "http://localhost:8188/Service.svc/brlist";
	var xhr = new XMLHttpRequest();
	xhr.open("GET", uri, true);
	xhr.setRequestHeader('Accept', 'application/json');
	xhr.onload = function () {
		var resp = JSON.parse(xhr.responseText);
		showBluray(resp);
		}
	xhr.send(null);
}

function showBluray(dest) {
   var listContent = "";
   for (var i = 0; i < dest.length; ++i) {
      var record = dest[i];
	  var id = record.Id;
	  var button = "<button class='right' type='button' onclick='window.location.href = \"http://redsox.uoa.auckland.ac.nz/BC/Closed/Service.svc/brbuy?id=" + id + "\"'>Buy Now!</button>"
	  var img = "<img alt='Logo' src='http://localhost:8188/Service.svc/brimg?id="
	  + record.Id + "' style='max-width: 200px; width: 100%; display: inline-block; vertical-align: middle;' />"
      listContent += "<tr><td>" + img + "</td><td class='mid'>" + record.Title +
	  "</td><td>" + button + "</td></tr>";
   }
   if (listContent == "") listContent += "<BR><BR>no results.<BR><BR>"
   document.getElementById("showTab").innerHTML = listContent;
}
function booksOrBluray(search) {
	search = search || null;
	var a = document.getElementById("mySelect").value;
	if (a == "Books") {
		if (search == null || search == "") getBooks();
		else getBooks("http://localhost:8188/Service.svc/booksearch?term=" + search);
	}
	else if (a == "Bluray") {
		if (search == null || search == "") getBluray();
		else getBluray("http://localhost:8188/Service.svc/brsearch?term=" + search);
	}
}

function getBooks(uri) {
	uri = uri || "http://localhost:8188/Service.svc/booklist";
	var xhr = new XMLHttpRequest();
	xhr.open("GET", uri, true);
	xhr.setRequestHeader('Accept', 'application/json');
	xhr.onload = function () {
		var resp = JSON.parse(xhr.responseText);
		showBooks(resp);
		}
	xhr.send(null);
}