import $ from "jquery";

import * as compose_state from "./compose_state";
import * as overlays from "./overlays";
import * as popovers from "./popovers";

let is_rt_visible = false;

export function set_visible(value) {
    is_rt_visible = value;
}

export function is_visible() {
    return is_rt_visible;
}

export function is_in_focus() {
    // Check if user is focused on
    // recent topics.
    return (
        is_visible() &&
        !compose_state.composing() &&
        !popovers.any_active() &&
        !overlays.is_overlay_or_modal_open() &&
        !$(".home-page-input").is(":focus")
    );
}

export function get_topic_key(stream_id, topic) {
    return stream_id + ":" + topic.toLowerCase();
}

export function get_key_from_message(msg) {
    if (msg.type === "private") {
        // The to_user_ids field on a private message object is a
        // string containing the user IDs involved in the message in
        // sorted order.
        return msg.to_user_ids;
    } else if (msg.type === "stream") {
        return get_topic_key(msg.stream_id, msg.topic);
    }
    throw new Error(`Invalid message type ${msg.type}`);
}