// tautulli's plex step — run once by the host after Tautulli's server container, and again whenever
// its binding, its pair credential or the server changed (the container's `restart-on`, novox/hq
// ADR 0099). It checks; it writes nothing (plex/check.ts says why, and where the write is).
//
// Exits non-zero when Tautulli does not reach plex as the mesh says, so the node reports the step
// failed. Declared last in the manifest, so its failing gates nothing else of tautulli's (novox/hq
// ADR 0136). Never prints a key or a token.

import { readFile } from "node:fs/promises";
import { join } from "node:path";

import { keyOfTautulli } from "../client.js";
import { check, tautulliReady, PROVISION, type Binding, type Http } from "./check.js";

const dir = process.env.MESH_PLEX_DIR ?? "/run/plex";
const url = process.env.MESH_TAUTULLI_URL ?? "http://127.0.0.1:8181";
const waitSeconds = Number(process.env.MESH_TAUTULLI_WAIT_SECONDS ?? "180");

const http: Http = { fetch: (u, init) => fetch(u, init) };
const read = (path: string) => readFile(path, "utf8").catch(() => undefined);

const apiKey = keyOfTautulli(process.env.MESH_TAUTULLI_CONFIG_DIR);
if (!apiKey) {
  console.error("[tautulli-plex] Tautulli's config.ini holds no API key yet — it writes one on its first start");
  process.exit(1);
}
const tautulli = { url, apiKey };

if (!(await tautulliReady(http, tautulli, waitSeconds * 1000))) {
  console.error(`[tautulli-plex] Tautulli did not answer at ${url} within ${waitSeconds}s`);
  process.exit(1);
}

let binding: Binding | undefined;
try {
  const raw = await read(join(dir, `${PROVISION}.json`));
  binding = raw === undefined ? undefined : (JSON.parse(raw) as Binding);
} catch {
  binding = undefined;
}
const outcome = await check(http, tautulli, binding, await read(join(dir, `${PROVISION}.secret`)));
if (outcome.result === "connected") {
  console.log(`[tautulli-plex] Tautulli reaches plex at ${outcome.url} as the mesh says; connected`);
} else {
  console.error(`[tautulli-plex] ${outcome.problem}`);
  process.exitCode = 1;
}