/**
 * Created by vitaliiomelchuk on 03.04.17.
 */

if (navigator.userAgent.match(/(iPad|iPhone|iPod|Android|Silk)/gi)) {
    document.title = "Інтернет-магазин цінних книг - Mediason";
    document.querySelector('meta[name="description"]').setAttribute("content", "Твори відомих авторів та професіоналів");
}

function updateCartView(count_selector, price_selector, response_json) {
    if (Object.prototype.hasOwnProperty.call(response_json, 'total_items_count')) {
        var cartCountElement = document.querySelectorAll(count_selector);
        if (cartCountElement) {
            if (cartCountElement.hasOwnProperty('innerHTML')) {
                cartCountElement.innerHTML = response_json.total_items_count;
            } else {
                for (var i in cartCountElement) {
                    cartCountElement[i].innerHTML = response_json.total_items_count;
                }
            }
        }
    }
    if (Object.prototype.hasOwnProperty.call(response_json, 'total_items_price')) {
        var cartPriceElement = document.querySelectorAll(price_selector);
        if (cartPriceElement) {
            if (cartPriceElement.hasOwnProperty('innerHTML')) {
                cartPriceElement.innerHTML = response_json.total_items_price;
            } else {
                for (var i in cartPriceElement) {
                    cartPriceElement[i].innerHTML = response_json.total_items_price;
                }
            }
        }
    }
}

function checkCart(count_selector, price_selector) {
    var xhr = new XMLHttpRequest();
    xhr.open('GET', '/eshop/add_to_cart/');
    xhr.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
    xhr.setRequestHeader('Content-Type', 'application/json');
    xhr.onload = function () {
        if (xhr.status === 200) {
            var resp = JSON.parse(xhr.responseText);
            window.console.log(resp);
            updateCartView(count_selector, price_selector, resp);
        }
        else {
            alert('Request failed.  Returned status of ' + xhr.status);
        }
    };
    xhr.send();
}

function addToCart(article_id, count, count_selector, price_selector) {
    var xhr = new XMLHttpRequest();
    xhr.open('POST', '/eshop/add_to_cart/');
    xhr.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
    xhr.setRequestHeader('Content-Type', 'application/json');
    xhr.onload = function () {
        if (xhr.status === 200) {
            var resp = JSON.parse(xhr.responseText);
            window.console.log(resp);
            updateCartView(count_selector, price_selector, resp);
        }
        else {
            alert('Request failed.  Returned status of ' + xhr.status);
        }
    };
    xhr.send(JSON.stringify({'article_id': article_id, 'count': count}))
}

function removeFromCart(item_id, count_selector, price_selector) {
    var xhr = new XMLHttpRequest();
    xhr.open('POST', '/eshop/remove_from_cart/');
    xhr.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
    xhr.setRequestHeader('Content-Type', 'application/json');
    xhr.onload = function () {
        if (xhr.status === 200) {
            var resp = JSON.parse(xhr.responseText);
            updateCartView(count_selector, price_selector, resp);
        }
        else {
            alert('Request failed.  Returned status of ' + xhr.status);
        }
    };
    xhr.send(JSON.stringify({'item_id': item_id}))
}

function initCart(count_selector, price_selector) {
    window.addEventListener('DOMContentLoaded', checkCart(count_selector, price_selector));
}