// The three helpers the town-crier leg needs from core's announce pipeline.
//
// Core owns `announce_jobs`, the worker that drains it and the retry policy;
// this module owns one leg of it (MODULE_API.md §2.4). These three lived in
// core's `announceJobs.logic` and are reproduced here rather than added to
// `ctx`, because each is a few lines of pure string handling with no state and
// no policy — the kind of thing a contract member would only make harder to
// change on both sides.
//
// The one that could NOT be vendored is `baseUrl`. Core's version reads
// `process.env.APP_BASE_URL`, and §2.7 forbids a module reading core's
// environment — it is core's deployment fact, not the module's. So it comes off
// `ctx.site.baseUrl` (API 1.1.0), read per call rather than captured, which also
// means a module built before an env change keeps agreeing with core after it.

// NOT destructured. `core.baseUrl` is a getter that resolves `ctx`, so pulling
// it out here would run at require time — before `register()` — and throw. Read
// it inside the function, where `ctx` exists.
const core = require('../core')

/** Where this deployment is reachable, without a trailing slash. */
function baseUrl() {
  return core.baseUrl
}

/**
 * The public link that goes in an announcement.
 *
 * News has no per-post route — core's SPA has only the list — so this links the
 * list, matching what the pre-pipeline Discord announce did. It names a CORE
 * route on purpose: the news list is core's page and stays core's through the
 * whole extraction, so this is a module linking to its host, not a leftover.
 */
function articleUrl(base) {
  return `${String(base || '').replace(/\/+$/, '')}/site/news`
}

/**
 * Squeeze a leg client's `{ ok, status, data, error }` into the one line stored
 * in `announce_job_legs.last_error` and shown in the admin panel.
 */
function legError(result) {
  if (!result) return 'no response'
  if (result.status) {
    return result.data && result.data.message
      ? `${result.status}: ${result.data.message}`
      : result.error || `status ${result.status}`
  }
  return result.error || 'request failed'
}

module.exports = { baseUrl, articleUrl, legError }