// nextcloud's events. The tool runtime imports this once the broker is bound. It watches the user
// list and the share list and announces new arrivals.
//
// Emits (novox/hq ADR 0041/0042):
//   module.nextcloud.user.created    — a user account appeared (occ user:list)
//   module.nextcloud.share.created   — a share appeared (OCS shares)
//
// Both are diffed and primed silently on the first look, so a restart does not re-announce every
// existing user and share as freshly created.

import { emit } from "@novox/mesh-sdk/events";
import { NextcloudClient } from "./client.js";

// Constructed lazily so an unconfigured node (no admin password) loads this entrypoint without
// crashing the events host — it simply watches nothing.
let nextcloud: NextcloudClient | undefined;
try {
  nextcloud = NextcloudClient.fromEnv();
} catch (err) {
  console.log(`[nextcloud] not configured, not watching: ${err}`);
}

const knownUsers = new Set<string>();
let usersPrimed = false;
async function pollUsers(client: NextcloudClient): Promise<void> {
  const users = client.listUsers();
  for (const u of users) {
    if (knownUsers.has(u.uid)) continue;
    if (usersPrimed) await emit("user.created", { uid: u.uid, displayName: u.displayName });
    knownUsers.add(u.uid);
  }
  usersPrimed = true;
}

const knownShares = new Set<string>();
let sharesPrimed = false;
async function pollShares(client: NextcloudClient): Promise<void> {
  const shares = await client.listShares();
  for (const s of shares) {
    if (knownShares.has(s.id)) continue;
    if (sharesPrimed) await emit("share.created", { id: s.id, path: s.path, shareType: s.shareType, shareWith: s.shareWith, owner: s.owner });
    knownShares.add(s.id);
  }
  sharesPrimed = true;
}

if (nextcloud) {
  const client = nextcloud;
  const tick = (fn: (c: NextcloudClient) => Promise<void>): void => {
    const run = (): void => void fn(client).catch((err) => console.error(`[nextcloud] ${err}`));
    setInterval(run, 60_000);
    run();
  };
  tick(pollUsers);
  tick(pollShares);
  console.log("[nextcloud] watching users and shares");
}