/**
 * Sync settings from the environment. A job is enabled only when its config
 * is present: the public sources (no credentials) are named in SYNC_JOBS;
 * jobs that need a URL or a login are enabled by those variables alone.
 */
import { homelabSettings, type HomelabSettings } from "./jobs/homelab.ts";

export interface SyncSettings {
  /** Public jobs switched on in SYNC_JOBS, e.g. "archidekt,bgg,covers". */
  enabled: Set<string>;
  /** SYNC_<JOB>_MINUTES overrides a job's interval. */
  minutes: Record<string, number>;
  /** SYNC_<JOB>_HEALTHCHECK_URL. */
  healthchecks: Record<string, string>;
  bggToken?: string;
  tmdbApiKey?: string;
  /** Suwayomi, Kavita, Bambuddy and Homebox: enabled by their own URL and login. */
  homelab: HomelabSettings;
}

const envKey = (job: string) => job.toUpperCase().replace(/[^A-Z0-9]/g, "_");

export function syncSettings(env: NodeJS.ProcessEnv = process.env): SyncSettings {
  const enabled = new Set((env.SYNC_JOBS ?? "").split(",").map((s) => s.trim().toLowerCase()).filter(Boolean));
  const minutes: Record<string, number> = {};
  const healthchecks: Record<string, string> = {};
  for (const [k, v] of Object.entries(env)) {
    if (!v) continue;
    const m = /^SYNC_([A-Z0-9_]+)_(MINUTES|HEALTHCHECK_URL)$/.exec(k);
    if (!m) continue;
    const job = m[1]!.toLowerCase().replace(/_/g, "-");
    if (m[2] === "MINUTES" && Number(v) > 0) minutes[job] = Number(v);
    if (m[2] === "HEALTHCHECK_URL") healthchecks[job] = v;
  }
  return {
    enabled,
    minutes,
    healthchecks,
    bggToken: env.BGG_TOKEN || undefined,
    tmdbApiKey: env.TMDB_API_KEY || undefined,
    homelab: homelabSettings(env),
  };
}

/** The env var name for one job's setting, for docs and messages. */
export const syncEnvName = (job: string, what: "MINUTES" | "HEALTHCHECK_URL") => `SYNC_${envKey(job)}_${what}`;