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/*
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Hook that returns the compute server that has been selected for a given document.
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*/
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import { useEffect, useMemo, useState } from "react";
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import { webapp_client } from "@cocalc/frontend/webapp-client";
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export default function useComputeServerId({
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  project_id,
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  path,
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}): number | null {
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  const [id, setId] = useState<number | null>(null);
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  const computeServerAssociations = useMemo(() => {
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    return webapp_client.project_client.computeServers(project_id);
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  }, []);
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  useEffect(() => {
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    const handleChange = async () => {
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      try {
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        const id =
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          (await computeServerAssociations.getServerIdForPath(path)) ?? null;
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        setId(id);
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      } catch (err) {
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        console.warn(err);
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      }
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    };
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    computeServerAssociations.on("change", handleChange);
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    (async () => {
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      await handleChange();
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    })();
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    return () => {
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      computeServerAssociations.removeListener("change", handleChange);
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    };
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  }, [project_id, path]);
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  return id;
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}
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