// ombi's events. The tool runtime imports this once the broker is bound. Ombi's timeline is the
// request lifecycle: a viewer files a request, and later an operator approves it. Both transitions
// are worth announcing — the mesh can notify on a new request, and act on an approval (that is when
// a downloader should start looking).
//
// Emits (novox/hq ADR 0041/0042):
//   module.ombi.request.created    — a viewer filed a new request
//   module.ombi.request.approved   — a request was approved
//
// Ombi is the origin of these decisions, not a reactor to the mesh, so it consumes nothing.
//
// Both events are observation-based: poll the request list and diff. Creation is diffed on the set
// of request ids; approval on each request's approved flag flipping true. Primed silently on the
// first look, or a restart would re-announce every existing request and approval.

import { emit } from "@novox/mesh-sdk/events";
import { OmbiClient, type OmbiRequest } from "./client.js";

const ombi = OmbiClient.fromEnv();

// Remember each seen request and whether it was approved last time, keyed by kind+id (ids are only
// unique within a kind).
const approvedState = new Map<string, boolean>();
let primed = false;

const keyOf = (r: OmbiRequest): string => `${r.kind}:${r.id}`;

async function pollRequests(): Promise<void> {
  const requests = await ombi.getRequests();
  for (const r of requests) {
    const key = keyOf(r);
    const known = approvedState.has(key);
    if (primed && !known) {
      await emit("request.created", {
        kind: r.kind,
        id: r.id,
        title: r.title,
        requestedBy: r.requestedBy,
        tmdbId: r.tmdbId,
      });
    }
    // Approval: the flag went from false to true for a request we already knew about.
    if (primed && known && r.approved && approvedState.get(key) === false) {
      await emit("request.approved", { kind: r.kind, id: r.id, title: r.title, tmdbId: r.tmdbId });
    }
    approvedState.set(key, r.approved);
  }
  primed = true;
}

const tick = (fn: () => Promise<void>, everyMs: number): void => {
  const run = (): void => void fn().catch((err) => console.error(`[ombi] ${err}`));
  setInterval(run, everyMs);
  run();
};
tick(pollRequests, 30_000);

console.log("[ombi] watching requests for new filings and approvals");