/**
 * This file is part of Haketilo.
 *
 * Function: Informing the popup about what happens in the content script
 *     (script injection, script blocking, etc.).
 *
 * Copyright (C) 2021 Wojtek Kosior
 * Redistribution terms are gathered in the `copyright' file.
 */

/*
 * IMPORTS_START
 * IMPORT listen_for_connection
 * IMPORT CONNECTION_TYPE
 * IMPORT repo_query
 * IMPORT subscribe_repo_query_results
 * IMPORT unsubscribe_repo_query_results
 * IMPORTS_END
 */

var activities = [];
var ports = new Set();

function report_activity_oneshot(name, data, port)
{
    port.postMessage([name, data]);
}

function report_activity(name, data)
{
    const activity = [name, data];
    activities.push(activity);

    for (const port of ports)
	port.postMessage(activity);
}

function report_script(script_data)
{
    report_activity("script", script_data);
}

function report_settings(settings)
{
    report_activity("settings", settings);
}

function report_document_type(is_html)
{
    report_activity("is_html", is_html);
}

function report_repo_query_action(update, port)
{
    report_activity_oneshot("repo_query_action", update, port);
}

function trigger_repo_query(query_specifier)
{
    repo_query(...query_specifier);
}

function handle_disconnect(port, report_action)
{
    ports.delete(port)
    unsubscribe_repo_query_results(report_action);
}

function new_connection(port)
{
    console.log("new activity info connection!");

    ports.add(port);

    for (const activity of activities)
	port.postMessage(activity);

    const report_action = u => report_repo_query_action(u, port);
    subscribe_repo_query_results(report_action);

    /*
     * So far the only thing we expect to receive is repo query order. Once more
     * possibilities arrive, we will need to complicate this listener.
     */
    port.onMessage.addListener(trigger_repo_query);

    port.onDisconnect.addListener(() => handle_disconnect(port, report_action));
}

function start_activity_info_server()
{
    listen_for_connection(CONNECTION_TYPE.ACTIVITY_INFO, new_connection);
}

/*
 * EXPORTS_START
 * EXPORT start_activity_info_server
 * EXPORT report_script
 * EXPORT report_settings
 * EXPORT report_document_type
 * EXPORTS_END
 */