$(function () {

    function showErrorMessage(text) {
        var snackbarContainer = document.querySelector('#errorLogin');
        var data = { message: text };
        snackbarContainer.MaterialSnackbar.showSnackbar(data);
    }

    var user = getCookie("username");
    var token = getCookie("token");
    if (user === null || user === "" || token === null || token === "") {

    } else {
        $.ajax({
            type: 'POST',
            url: 'admin?action=check_login',
            contentType: "application/json;charset=utf-8",
            headers: { 'logged-user': getCookie("username"), 'cookie-token': getCookie("token") },
            dataType: 'json',
            complete: function (response) {
                if (response.status == 200) {
                    window.open("admin?cookie-token=" + token + "&logged-user=" + user, "_self");
                }
            }
        });
    }

    $("#submitLogin").click(function () {
        var userName = $("#userNameLogin").val();
        var pass = $("#passwordLogin").val();

        if (userName === "" || pass == "") {
            showErrorMessage("Unesite korisniko ime i lozinku.");
            return;
        }
        var jsonObj = {
            username: userName,
            password: pass
        }
        $.ajax({
            type: 'POST',
            url: 'admin?action=user_login',
            contentType: "application/json;charset=utf-8",
            dataType: 'json',
            data: JSON.stringify(jsonObj),
            complete: function (response) {
                if (response.status == 404) {
                    showErrorMessage("Pogresno korisnicko ime ili lozinka.");
                    return;
                }
                else if (response.status == 200) {
                    var token = response.responseText;
                    setCookie("token", token, 1);
                    setCookie("username", $("#userNameLogin").val(), 1);
                    window.open("admin?cookie-token=" + token + "&logged-user=" + $("#userNameLogin").val(), "_self");
                }
            }
        });
    });
});
function setCookie(cname, cvalue, exdays) {
    var d = new Date();
    d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
    var expires = "expires=" + d.toGMTString();
    document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
}

function getCookie(cname) {
    var name = cname + "=";
    var decodedCookie = decodeURIComponent(document.cookie);
    var ca = decodedCookie.split(';');
    for (var i = 0; i < ca.length; i++) {
        var c = ca[i];
        while (c.charAt(0) == ' ') {
            c = c.substring(1);
        }
        if (c.indexOf(name) == 0) {
            return c.substring(name.length, c.length);
        }
    }
    return "";
}

function checkCookie() {
    var user = getCookie("username");
    if (user != "") {
        alert("Welcome again " + user);
    } else {
        user = prompt("Please enter your name:", "");
        if (user != "" && user != null) {
            setCookie("username", user, 30);
        }
    }
}