var isLoggedIn = false;
var searchBoolean = false;
//Run this function when we have loaded the HTML document
window.onload = function () {
    //Request items from the server. The server expects no request body, so we set it to null


    //This code is called when the body element has been loaded and the application starts
    updateStockList();


    /**
     * Laver en ny bruger og disabler knappen så du ikke kan lave flere brugere
     * Du kan derefter logge in.
     */
    $("#create-customer-submit-button").click(function () {
        var login = document.getElementById("login-button");
        var create = document.getElementById("create-customer-submit-button");
        createCustomer();
        create.disabled = true;
        login.disabled = false;

    });


    /**
     * Logger dig ind og fjerner div efter.
     */
    $("#login-button").on("click", function () {
        loginCustomer();
        makeLoginDivDisappear();

    });


    /**
     * Viser din kurv ved tryk og hvis du trykker på den igen slider den up.
     */
    $('a#show-quick-cart').click(function () {

        if ($('div#cart').css("display") == 'none') {
            $('div#cart').slideDown(500);
        } else {
            $('div#cart').slideUp(500);
            $("#buy-items-message").text("");
        }
        return false;
    });


    /**
     * Får login div frem og hvis du trykker på den igen forsvinder den.
     */
    $('a#login').click(function () {

        if ($('div.login-div').css("display") == 'none') {
            $('div.login-div').slideDown(500);
        } else {
            $('div.login-div').slideUp(500);
        }
        return false;
    });

    //ONLOAD FUNCTIONS
    buyItemsInCart();
    makeSearchEnter();
    myOrdersLogInFirst();
    goHome();
    hideFormerBought();
};


/**
 * Får login div til at slideup når musen forlader div'en.
 */
function makeLoginDivDisappear() {
    $('div.login-div').mouseleave(function () {
        $('div.login-div').slideUp(500);
    });
}


/**
 * Når du søger efter noget og trykker på enter bliver search kaldt.
 */
function makeSearchEnter() {
    $(document).on('keyup', "#searchField", function (e) {
        if (e.keyCode == 13) {
            searchForItems();

        }
    });
}


/**
 *  Vores søge funktion, den ser hvilken shop du kigger på nu.
 *  Og søger derefter det og viser det på siden.
 */
function searchForItems() {
    var search = document.getElementById("searchField").value;
    var shop = document.getElementById("mySelect").value;
    console.log(search.length);
    if (search.length != 0){
        $('#searchField').val('');
        $('#searchField').attr("placeholder",'Searching...');

    }else {
        $('#searchField').attr("placeholder",'Please type in text');
    }
    $.post("/rest/shop/search", {search: search, shopID: shop}, function (response) {
        var items = JSON.parse(response);
        addItemsToTable(items);
        searchBoolean = true;
        $('#searchField').attr("placeholder",'Done! Enter new Word');

    });
}


/**
 *  Laver en customer og ser om det er udfyldt korrekt.
 *  Giver besked tilbage til brugeren, hvis det ikke lykkes.
 */
function createCustomer() {
    var createCustomerName = document.getElementById("createUserName").value;
    var createCustomerPassword = document.getElementById("createUserPassword").value;

    if (!(createCustomerName.length > 0 && createCustomerPassword.length > 0)) {
        errorMessage("You must fill in both username and password!");
    } else {
        $.post("/rest/shop/createCustomer", {
            username: createCustomerName,
            password: createCustomerPassword
        }, function (name) {
            var login = document.getElementById("login-customer-submit-button");
            var create = document.getElementById("create-customer-submit-button");
            if (name == "true") {
                errorMessage("Your are now a customer. Please Log in");
                create.disabled = true;
                login.disabled = false;
            } else {
                errorMessage("We could not create you. Username is taken");
                login.disabled = false;
                create.disabled = false;
            }
        });
    }

}


/**
 * Logger din bruger ind og sætter boolean: isLoggedIn til true.
 */
function loginCustomer() {
    var customerName = document.getElementById("createUserName").value;
    var customerPass = document.getElementById("createUserPassword").value;

    if (!(customerName.length > 0 && customerPass.length > 0)) {
        errorMessage("You must fill in both username and password!");
    } else {
        $.post("/rest/shop/loginCustomer", {
            username: customerName,
            password: customerPass
        }, function (name) {
            var login = document.getElementById("login-button");
            var create = document.getElementById("create-customer-submit-button");
            if (name == "true") {
                errorMessage("You are now logged in.");
                isLoggedIn = true;
                create.disabled = true;
                login.disabled = true;
            } else {
                errorMessage("We could not log you in. Did you type your username & Password correct?");
            }

        });

    }
}


/**
 * Se mine tidligere ordre. Skjuler nuværende items og viser dine købte.
 */
function myOrdersLogInFirst() {
    $(document).on('click', '#my-orders-button', function () {
        if (isLoggedIn == false) {
            alert("You have to log in before you can see your previous orders!");
        } else {
            hideTable();
            getFormerBought();
            showFormerBought();
        }
    });
}

/**
 * Til at vise brugeren, hvis det ikke lykkes at logge ind eller create customer.
 */
function errorMessage(name) {
    $("#login-message-error-area").text(name);
}

/**
 * Hvis det ikke lykkes at købe tingene i kurven.
 * Eller hvis det lykkes giver den besked.
 */
function buyMessage(text) {
    $("#buy-items-message").text(text);
}


/**
 * Bliver kaldt når siden loades og laver selecter.
 */
function updateStockList() {
    sendRequest("GET", "rest/shop/testing", null, function (itemsText) {
        //This code is called when the server has sent its data
        var items = JSON.parse(itemsText);
        addItemsToTable(items);
        getShopNames();
    });
}

/**
 * Bliver kaldt for at opdatere itemsList.
 */
function updateStockListWithOutSelect() {
    sendRequest("GET", "rest/shop/testing", null, function (itemsText) {
        //This code is called when the server has sent its data
        var items = JSON.parse(itemsText);
        addItemsToTable(items);
    });
}

/**
 * Opdaterer itemsList med det shopID som Selecteren har.
 */
function updateStockListWithOtherShopID() {
    var shopID = $('#mySelect').val();
    console.log(shopID);
    sendRequest("GET", "rest/shop/items/" + shopID, null, function (itemsText) {
        //This code is called when the server has sent its data
        var items = JSON.parse(itemsText);
        addItemsToTable(items);
        hideFormerBought();
        showTable();
    });
}

/**
 * Funktion der gør det muligt at købe det der er i cart.
 */
function buyItemsInCart() {
    $(document).on("click", "#buy-items-in-shopping-bag", function () {

        if (isLoggedIn == false) {
            buyMessage("You need to login to buy your items");
        } else {
            buyMessage("");
            $.post("/rest/shop/buyItemsInCart", null, function (response) {
                console.log("We got response");
                buyMessage(response);
                updateStockListWithOutSelect();

                var shoppingBag = document.getElementById("quickCart-products");

                //FIXME
                /*
                 var $length = $('#quickCart-products').find('div').length;
                 console.log("length is " + $length);
                 if ($length >= 1) {
                 for(i = 0; i<$length; i++){
                 console.log(i);
                 console.log(shoppingBag);
                 console.log(shoppingBag.childNodes[i]);
                 shoppingBag.removeChild(shoppingBag.childNodes[i]);
                 }
                 }
                 */


                var price = document.getElementById("total-price");
                price.innerHTML = "0 kr.";
                updateStockListWithOtherShopID();
                var noItems = document.getElementById("no-items");
                noItems.style.display = "block";

            });

        }
    });
}



/**
 * //FIXME
 */
function addToCartIfLoggedIn(itemID, itemStock) {
    if (itemStock > 0) {
        $.post("/rest/shop/addToCart", {itemID: itemID}, function (response) {
            //Do nothing...

        });
    }
}

function removeFromCartIfLoggedIn(itemID) {
    $.post("/rest/shop/removeFromCart", {itemID: itemID}, function (response) {
        //Do nothing...
    });
}



/**
 * Denne metode viser processen når der tilføjes et item til kurven. Når der
 * trykkes på addItemButton tælles produktet 1 op. Det er kun muligt så længe stock er over 0.
 * Dette bliver kontrolleret af metoden eow.
 * removeButton gør det modsatte af dette, den tæller antallet af det givne produkt ned medmindre
 * der er 0 af disse produkter. Metoden removeFromQuickCart fjerne produktet fra kurven.
 */
var stockValue;
function addToCartChange() {

    $(".addItemButton").click(function () {

        var $this = $(this);

        var $counter = $this.closest('td').next('.itemsInCart').find('span');
        var $number = parseInt($counter.text());
        var $numberToAdd = 1;
        var $stock = $this.closest('td').prev('td');
        var $stockValue = parseInt($stock.text());
        stockValue = $stockValue;
        eow();

        function eow(stockValue) {

            if ($number < $stockValue || $stockValue > 0) {
                $number = $number + $numberToAdd;
                $stockValue--;
                $counter.replaceWith("<span class='inputInCart'>" + $number + "</span>");
                $stock.replaceWith("<td>" + $stockValue + "</td>");


            } else {

                $number = $stockValue;
            }
        }

        price();

    });

    $(".removeItemButton").click(function () {

        var $this = $(this);

        var $counter = $this.closest('td').prev('.itemsInCart').find('span');
        var $number = parseInt($counter.text());
        var $numberToRemove = 1;
        var $stock = $this.closest('td').prev('td').prev('td').prev('td');
        var $stockValue = parseInt($stock.text());

        if ($number > 0) {
            $number = $number - $numberToRemove;
            $stockValue++;
            $counter.replaceWith("<span class='inputInCart'>" + $number + "</span>")
            $stock.replaceWith("<td>" + $stockValue + "</td>")
        } else {
            $number = 0;
        }

        price();
        removeFromQuickCart();

        function removeFromQuickCart() {

            var $name = $this.closest('td').prev('td').prev('td').prev('td').prev('td').prev('td').prev('td').prev('td');
            var $nameText = $name.text();
            console.log($nameText);
            var $thisName = '.' + $nameText.toString();
            console.log($thisName);
            if ($('#quickCart-products').find($thisName).length != 0) {

                var elements = $('#quickCart-products').find($thisName);
                elements[0].parentNode.removeChild(elements[0]);
            }

            if ($('#quickCart-products').find('p').length === 1) {

                var noItems = document.getElementById("no-items");
                noItems.style.display = "block";
            }
        }

    });

}


/**
 * Tilføjer et given produkt fra tabellen til kurven
 */
function addToQuickCart(itemName, itemPrice, itemURL) {

    // DIV
    var divToAdd = document.createElement("div");
    divToAdd.className = "divProductWithItem";

    // IMG
    var image = document.createElement('img');
    image.className = "fishPictures";
    image.src = itemURL;
    image.alt = "FAIL";
    divToAdd.appendChild(image);


    // NAME
    var para = document.createElement("p");
    para.textContent = itemName;
    para.className = itemName;
    divToAdd.appendChild(para);

    // PRICE
    var price = document.createElement("p");
    price.textContent = itemPrice + ' kr.';
    price.className = "itemPriceQuickCart";
    divToAdd.appendChild(price);

    $('.quickCart-products').prepend(divToAdd);

    var noItems = document.getElementById("no-items");
    noItems.style.display = "none";
}

/**
 * Denne metode gør det muligt at se navnene på de andre shops
 */
function getShopNames() {
    sendRequest("GET", "rest/shop/getShopNames", null, function (shopNames) {
        var shops = JSON.parse(shopNames);
        viewShops(shops);
    });
}

/**
 * Denne metode laver en liste over alle de shops der ligger på serveren.
 * Metoden selectList fylder produkttabellen ud med de produkter der tilhører den givne shop.
 * @param shopNames
 */
function viewShops(shopNames) {
    var scroller = document.getElementById("scroller");
    var select = document.createElement("SELECT");
    for (i = 0; i < shopNames.length; i++) {
        (function (i) {
            var shop = shopNames[i];

            select.setAttribute("id", "mySelect");


            scroller.appendChild(select);

            var shopName = shop.shopName;
            var shopID = shop.ShopID;

            var option = document.createElement("option");
            option.setAttribute("value", shopID);

            if (shop.shopName == "Fish Shop") {
                option.setAttribute("selected", "selected");
            }

            var shoptext = document.createTextNode(shopName);
            option.appendChild(shoptext);
            select.appendChild(option);
        }(i));
    }
    selectList();
}

/**
 * Denne metode muliggør at vores customer kan komme til startsiden, som er siden med produkttabellen.
 * Dette opnås ved at trykke homeiconet eller ved at trykke på fishop logoet.
 */
function goHome() {
    $(document).on('click', '#home-button', function () {
        showTable();
        hideFormerBought();
        if (searchBoolean == true){
            updateStockListWithOtherShopID();
            searchBoolean = false;
        }
    });

    $(document).on('click', '#logo', function () {

        showTable();
        hideFormerBought();
        if (searchBoolean == true){
            updateStockListWithOtherShopID();
            searchBoolean = false;
        }
    });

}

/**
 * Viser tidligere købte varer
 */
function showFormerBought() {
    var list = document.getElementById("my-orders");
    list.style.display = "table";
    list.style.visibility = "visible";
    list.style.width = "100%";
    list.style.marginTop = "0px";
}

/**
 * Gemmer tidligere købte varer
 */
function hideFormerBought() {

    var list = document.getElementById("my-orders");
    list.style.display = "none";
    list.style.visibility = "hidden";
    list.style.marginTop = "150px";
}

/**
 * gemmer produkttabellen
 */
function hideTable() {
    var table = document.getElementById("table-div");
    table.style.display = "none";
    table.style.visibility = "hidden";
}

/**
 * Viser produkttabellen
 */
function showTable() {
    var table = document.getElementById("table-div");
    table.style.display = "table";
    table.style.visibility = "visible";
    table.style.width = "100%";
}

/**
 * Vi får de tidligere købte varer for den givne customer
 */
function getFormerBought() {
    sendRequest("GET", "rest/shop/itemsBought", null, function (shopNames) {
        var shops = JSON.parse(shopNames);
        viewBoughtItems(shops);
    });
}

/**
 * I denne metode udfylder vi tabellen der indeholder de tidligere købte produkter.
 * Dette opnås ved at loop'e gennem items og placere et item på en række, hvor itemID,
 * itemName osv. bliver sat i deres respective celler.
 * @param items
 */
function viewBoughtItems(items) {
    //Get the table body we we can add items to it
    var tableBody = document.getElementById("itemTableBody-my-orders");
    //Remove all contents of the table body (if any exist)
    tableBody.innerHTML = "";


    var totalAmountForCustomer = 0;
    for (i = 0; i < items.length; i++) {
        //GET ITEMS FROM SERVER WITH ID
        (function (i) {
            var itemFormerBought = items[i];

            var tr = document.createElement("tr");

            //TIME BOUGHT
            var dateCell = document.createElement("td");
            var timeStamp = new Date(parseInt(itemFormerBought.saleTime));
            var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
            var year = timeStamp.getFullYear();
            var month = months[timeStamp.getMonth()];
            var days = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'];
            var date = timeStamp.getDate();
            var day = days[timeStamp.getDay()];
            var hours = timeStamp.getHours();
            var minutes = timeStamp.getMinutes();
            var seconds = timeStamp.getSeconds();
            //+ " at " +hours+ ":" + minutes + ":" + seconds
            dateCell.textContent = day + ", " + month + " " + date + ", " + year;
            tr.appendChild(dateCell);


            // ITEM NAME
            var nameCell = document.createElement("td");
            nameCell.className = "itemName";
            nameCell.textContent = itemFormerBought.item.itemName;
            tr.appendChild(nameCell);

            // ITEM URL / PICTURE
            var picturecell = document.createElement("td");
            var image = document.createElement('img');
            image.className = "fishPictures";
            image.src = itemFormerBought.item.itemURL;
            image.alt = "FAIL";
            picturecell.appendChild(image);
            tr.appendChild(picturecell);


            //ITEM DESCRIPTION
            var htmlItemDescription = itemFormerBought.item.itemDescription;
            var htmlConverter = document.createElement("td");
            htmlConverter.innerHTML = htmlItemDescription;
            tr.appendChild(htmlConverter);


            // ITEM AMOUNT
            var itemAmount = document.createElement("td");
            var saleAmount = itemFormerBought.saleAmount;
            itemAmount.textContent = saleAmount;
            tr.appendChild(itemAmount);


            // ITEM PRICE
            var paraItemPrice = document.createElement("td");
            var itemPrice = itemFormerBought.item.itemPrice;
            paraItemPrice.textContent = itemPrice + " kr.";
            tr.appendChild(paraItemPrice);


            // TOTAL FOR THIS ITEM
            var paraItemTotalAmount = document.createElement("td");
            var totalForThisItem = (parseInt(itemPrice * saleAmount));
            totalAmountForCustomer += totalForThisItem;
            paraItemTotalAmount.textContent = totalForThisItem + " kr.";
            tr.appendChild(paraItemTotalAmount);


            //Append
            tableBody.appendChild(tr);


        }(i));
    }

    var div = document.getElementById("result-my-orders");
    div.innerHTML = "";
    var totalPricePara = document.createElement("p");
    totalPricePara.textContent = "Total price for all your buys is " + totalAmountForCustomer;
    div.appendChild(totalPricePara);
}


/**
 * Denne metode styrer hvilken shops produkttabel der bliver vist
 */
function selectList() {
    $('#mySelect').change(function () {
        var shopID = $(this).val();
        sendRequest("GET", "rest/shop/items/" + shopID, null, function (itemsText) {
            //This code is called when the server has sent its data
            var items = JSON.parse(itemsText);
            addItemsToTable(items);
            hideFormerBought();
            showTable();
        });

    });
}

/**
 * Denne metode summerer prisen for alle de produkter der befinder sig i kurven
 */
function price() {
    var totalPriceSpan = document.getElementById("total-price"),
        $totalPriceSpan = totalPriceSpan,
        amount = document.getElementsByClassName("inputInCart"),
        price = document.getElementsByClassName("price"),
        parent = totalPriceSpan.parentNode,
        tempDiv = document.createElement('div');

    var totalPrice = 0;

    for (var i = 0; i < amount.length; i++) {


        var amountOfItem = parseInt(amount[i].innerText);
        var priceOfEach = parseInt(price[i].innerText);

        var priceOfAll = amountOfItem * priceOfEach;
        var oldString = totalPrice.toString() + "kr.";

        totalPrice += priceOfAll;
        var totalPriceString = totalPrice.toString() + "kr.";
    }

    tempDiv.innerHTML = "<b class='total-price' id='total-price'>" + totalPriceString + "</b>";

    var input = tempDiv.childNodes[0];

    parent.replaceChild(input, totalPriceSpan);

}

/**
 * I denne metode udfylder vi vores produkttabel. Dette gøres ved at loop'e igennem
 * alle items og placere dem på hver sin rækk, med itemID, itemName osv. i ders respektive celler.
 * @param items
 */
function addItemsToTable(items) {
    //Get the table body we we can add items to it
    var tableBody = document.getElementById("itemtablebody");
    //Remove all contents of the table body (if any exist)
    tableBody.innerHTML = "";

    //Loop through the items from the server
    for (var i = 0; i < items.length; i++) {
        (function (i) {
            var item = items[i];
            //Create a new line for this item
            var tr = document.createElement("tr");
            tr.id = item.itemID;


            // ITEM NAME
            var nameCell = document.createElement("td");
            nameCell.className = "itemName";
            nameCell.textContent = item.itemName;
            tr.appendChild(nameCell);

            //Item URL / ITEM PICTURE
            var picturecell = document.createElement("td");
            var image = document.createElement('img');
            image.className = "fishPictures";
            image.src = item.itemURL;
            image.alt = "FAIL";
            picturecell.appendChild(image);
            tr.appendChild(picturecell);

            // ITEM PRICE
            var priceCell = document.createElement("td");
            priceCell.textContent = item.itemPrice;
            priceCell.className = "price";
            tr.appendChild(priceCell);

            //ITEM DESCRIPTION
            var htmlItemDescription = item.itemDescription;
            var htmlConverter = document.createElement("td");
            htmlConverter.innerHTML = htmlItemDescription;
            tr.appendChild(htmlConverter);

            // ITEM STOCK
            var itemStock = document.createElement("td");
            itemStock.textContent = item.itemStock;
            tr.appendChild(itemStock);


            // ADD TO CART
            var addToCart = document.createElement("td");
            var addToCartButton = document.createElement("BUTTON");
            addToCartButton.className = "addItemButton";
            var buttonText = document.createTextNode("  +  ");
            addToCartButton.appendChild(buttonText);
            addToCart.appendChild(addToCartButton);
            tr.appendChild(addToCart);

            // ADD TO CART - FUNCTION
            $(addToCartButton).click(function () {
                addToQuickCart(item.itemName, item.itemPrice, item.itemURL);
                addToCartIfLoggedIn(item.itemID, item.itemStock);
            });

            // IN CART
            var itemsInCart = document.createElement("td");
            itemsInCart.className = "inCart";
            var inputField = document.createElement("span");
            inputField.textContent = "0";
            inputField.className = "inputInCart";
            itemsInCart.appendChild(inputField);
            itemsInCart.className = "itemsInCart";
            tr.appendChild(itemsInCart);

            //REMOVE FROM CART
            var removeFromCart = document.createElement("td");
            var removeFromCartButton = document.createElement("BUTTON");
            removeFromCartButton.className = "removeItemButton";
            var buttonText = document.createTextNode("  -  ");
            removeFromCartButton.appendChild(buttonText);
            removeFromCart.appendChild(removeFromCartButton);
            tr.appendChild(removeFromCart);

            // REMOVE FROM CART - BUTTON
            $(removeFromCartButton).click(function () {
                removeFromCartIfLoggedIn(item.itemID);
            });


            // ITEM ID
            var itemID = document.createElement("td");
            itemID.textContent = item.itemID;
            tr.appendChild(itemID);

            tableBody.appendChild(tr);
        })(i);
    }

    addToCartChange();

}


/////////////////////////////////////////////////////
// Code from slides
/////////////////////////////////////////////////////

/**
 * A function that can add event listeners in any browser
 */
function addEventListener(myNode, eventType, myHandlerFunc) {
    if (myNode.addEventListener)
        myNode.addEventListener(eventType, myHandlerFunc, false);
    else
        myNode.attachEvent("on" + eventType,
            function (event) {
                myHandlerFunc.call(myNode, event);
            });
}

var http;
if (!XMLHttpRequest)
    http = new ActiveXObject("Microsoft.XMLHTTP");
else
    http = new XMLHttpRequest();

function sendRequest(httpMethod, url, body, responseHandler) {
    http.open(httpMethod, url);
    if (httpMethod == "POST") {
        http.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
    }
    http.onreadystatechange = function () {
        if (http.readyState == 4 && http.status == 200) {
            responseHandler(http.responseText);
        }
    };
    http.send(body);
}