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/*
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 *  This file is part of CoCalc: Copyright © 2020 Sagemath, Inc.
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 *  License: MS-RSL – see LICENSE.md for details
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 */
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// Monitor ping events from webapp_client and use them to set some
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// ping state in the page store.
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import { redux } from "../app-framework";
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import { webapp_client } from "../webapp-client";
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export function init_ping(): void {
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  webapp_client.on("ping", (ping_time: number): void => {
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    let ping_time_smooth = redux.getStore("page").get("avgping") ?? ping_time;
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    // reset outside 3x
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    if (ping_time > 3 * ping_time_smooth || ping_time_smooth > 3 * ping_time) {
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      ping_time_smooth = ping_time;
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    } else {
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      const decay = 1 - Math.exp(-1);
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      ping_time_smooth = decay * ping_time_smooth + (1 - decay) * ping_time;
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    }
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    redux.getActions("page").set_ping(ping_time, Math.round(ping_time_smooth));
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  });
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}
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