//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 imgs_index_2 = [];
let last_index = -1;

let login_clicked = false;
let register_clicked = false;

function change_slideshow_img()
{
    let buffer = (imgs_index === undefined || imgs_index.length === 0) ? imgs_index_2 : imgs_index;
    let random_index = 5;

    do
    {
        random_index = Math.floor(Math.random() * buffer.length);
        //console.log("A");
    } while (buffer[random_index] == last_index);

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

    if (imgs_index.includes(buffer[random_index]))
    {
        imgs_index_2.push(buffer[random_index]);
        imgs_index.splice(random_index, 1);
    } else
    {
        imgs_index.push(buffer[random_index]);
        imgs_index_2.splice(random_index, 1);
    }

    //console.log(buffer[random_index] + "\n" + last_index + "\n\n");

    last_index = buffer[random_index];
}

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)
{
    document.getElementById("login_indicator").style.visibility = "visible";
    document.getElementById("login_indicator").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";
}