import { workspacesAtom } from "@yaakapp-internal/models";
import { useAtomValue } from "jotai";
import { useEffect, useMemo } from "react";
import { jotaiStore } from "../lib/jotai";
import { getKeyValue, setKeyValue } from "../lib/keyValueStore";
import { activeWorkspaceIdAtom } from "./useActiveWorkspace";
import { useKeyValue } from "./useKeyValue";

const kvKey = () => "recent_workspaces";
const namespace = "global";
const fallback: string[] = [];

export function useRecentWorkspaces() {
  const workspaces = useAtomValue(workspacesAtom);
  const { value, isLoading } = useKeyValue<string[]>({ key: kvKey(), namespace, fallback });

  const onlyValidIds = useMemo(
    () => value?.filter((id) => workspaces.some((w) => w.id === id)) ?? [],
    [value, workspaces],
  );

  if (isLoading) return null;

  return onlyValidIds;
}

export function useSubscribeRecentWorkspaces() {
  useEffect(() => {
    const unsub = jotaiStore.sub(activeWorkspaceIdAtom, updateRecentWorkspaces);
    updateRecentWorkspaces().catch(console.error); // Update when opened in a new window
    return unsub;
  }, []);
}

async function updateRecentWorkspaces() {
  const activeWorkspaceId = jotaiStore.get(activeWorkspaceIdAtom);
  if (activeWorkspaceId == null) return;

  const key = kvKey();

  const recentIds = getKeyValue<string[]>({ namespace, key, fallback });
  if (recentIds[0] === activeWorkspaceId) return; // Short-circuit

  const withoutActiveId = recentIds.filter((id) => id !== activeWorkspaceId);
  const value = [activeWorkspaceId, ...withoutActiveId];
  console.log("Recent workspaces update", activeWorkspaceId);
  await setKeyValue({ namespace, key, value });
}