document.onload(
    checkOpenWindow()

)

function checkOpenWindow (){
    var window = document.querySelector(".container-messages")
    while (window === null){

        check_timeout()
    }
    if (window !== null) {
        var data_set = document.querySelector(".container-messages").dataset
        var sender = data_set['curReceiver'];
        var receiver = data_set['ticketId'];
        var ticket_id = data_set['userId'];


        var data = {
            'sender': sender,
            'receiver': receiver,
            'ticket_id': ticket_id
            // 'last_message_modifiteDT':last_message_time
        }
    }
}

function check_timeout(){
    setTimeout(checkOpenWindow, 1000)
}

function timeout (){
    var window = document.querySelector(".container-messages")
    while (window !== null){
        setTimeout(check_new_messages, 1000)
    }
}

function check_new_messages (){
    // let user_online_check = document.addEventListener("mouseover");
    let last_message_time = document.querySelector(".date_n_time_last_message").dataset['modifieddt'];
    data['last_message_modifiteDT'] = last_message_time

    $.ajax({
        headers: { "X-CSRFToken": $('input[name=csrfmiddlewaretoken]').val() },
        url: '/ru/messages/update_chat/',
        type: "POST",
        // async: true,
        cache: false,
        processData: false,
        contentType: false,
        // enctype: 'json',
        data: JSON.stringify(data),
        success: function(data){

            if (data.msgs_count > 1){
                document.querySelector(".container-messages").innerHTML = data.html;
            } else {
                document.querySelector(".info_profile").innerHTML = data.html;
            }

        },
        error: function (data){

            document.querySelector(".info_profile").innerHTML = data.responseJSON.html;

        }
    });
}