//let imgs_index = [ 59, 58, 56, 55, 54, 67, 66, 64, 61, 60 ];
let imgs_index = [ 54, 55, 56, 57, 58, 59, 60, 61, 62, 63 ];
let last_index = imgs_index.length - 1;

let login_clicked = false;
let register_clicked = false;

function change_slideshow_img()
{
    if (last_index == imgs_index.length - 1)
    {
        let first_index = imgs_index[0];

        do
        {
            imgs_index.sort(() => Math.random() - 0.5);
        } while (first_index == imgs_index[0]);

        last_index = 0;
    }

    document.getElementById("slideshow").src = "http://109.123.243.163/fht/fabrika_imgs/downscaled/" + imgs_index[last_index++] + ".jpg";
}

function repeat_panorama()
{
    setInterval(change_slideshow_img, 3000);
}

function show_login()
{
    if (!login_clicked)
    {
        document.getElementById("sub_btn").value = "Přihlásit se";
        document.getElementById("login_pane").style.visibility = "visible";
    } else
    {
        document.getElementById("login_pane").style.visibility = "hidden";
    }

    login_clicked = !login_clicked;
    register_clicked = false;
}

function show_register()
{
    if (!register_clicked)
    {
        document.getElementById("sub_btn").value = "Registrovat se";
        document.getElementById("login_pane").style.visibility = "visible";
    } else
    {
        document.getElementById("login_pane").style.visibility = "hidden";
    }

    register_clicked = !register_clicked;
    login_clicked = false;
}

function set_login_uname(uname)
{
    if (document.getElementById("login_indicator").style.visibility == "visible") return;

    document.getElementById("login_indicator").style.visibility = "visible";
    document.getElementById("login_indicator_text").innerText += " " + uname;

    document.getElementById("login_buttons").style.visibility = "hidden";
    document.getElementById("logout_button").style.visibility = "visible";
}

function logout()
{
    document.getElementById("login_buttons").style.visibility = "visible";
    document.getElementById("logout_button").style.visibility = "hidden";
    document.getElementById("login_indicator").style.visibility = "hidden";
}