// ── Admin · Client assets ──────────────────────────────────────────────────
//
// Operating the asset import: what the site holds, what the shard's client files
// currently are, and a re-import after a client patch (docs/link/v8.md §6, §8,
// §14, protocol 8 phase 3).
//
// The policy lives in the model. This controller does three things and no more:
// it validates input, it maps an import RESULT onto an HTTP status, and it
// records the action in the admin activity log.
//
// **An import result is not an exception**, exactly as for clilocs. A shard that
// is down, an asset plane the operator has switched off, a Linux host with no
// libgdiplus, a client patched halfway through the walk — each is a 200 carrying
// `status: 'unavailable'` and a reason naming what to fix, not a 500 that says
// only "something broke". The one thing that DOES 500 is this file having a bug.
//
// **This is the only thing that imports.** Boot never calls the shard for assets,
// for the same reason it stopped calling it for clilocs: the files change when an
// operator patches their client, which is an event they know about and the site
// does not. So this endpoint is what an operator presses afterwards.
//
// Phase 8 built the panel these serve (`Admin → Client Files`) and added one
// thing to this pair: the import records a summary of what it did, and the
// vanished keys it refuses to apply come back with the pictures they currently
// have. Both exist because an operator pressing Update needs to see an answer,
// and the audit log — which still receives every action here — is one unfiltered
// list of every admin action on the site, so an import from three client patches
// ago cannot be found in it (org lead, 2026-09-14).

const assets = require('../../model/shardAssets/shardAssets.model')
const itemArt = require('../../model/shardAssets/shardItemArt.model')
const { activity } = require('../../core')

const log = require('../../core').logger('admin-shard-assets')

// GET /admin/shard/assets — what is loaded, what the shard says, whether they
// disagree. No public counterpart: the assets themselves are served as ordinary
// files under /uploads, and this is the operating view of the import.
async function getStatus(req, res) {
  try {
    return res.json(await assets.getStatus())
  } catch (err) {
    log.error('getStatus', err)
    return res.status(500).json({ message: 'Internal Server Error' })
  }
}

// POST /admin/shard/assets/import — import or update the body catalogue, then
// re-resolve the atlas's creatures and re-derive their artwork.
//
// `force` re-imports even when the client files are unchanged. It is also how an
// operator recovers a wiped uploads volume: the database still holds every hash,
// so the ordinary gate would report "unchanged" while every picture is missing.
// (The import checks for the file on disk per key as well, so that case usually
// heals itself — `force` is the answer when it does not.)
//
// `approve` accepts a catalogue that no longer offers keys this site holds.
// Refused by default because an unmounted client volume and a deliberate
// downgrade look identical from the server, and the wrong guess deletes artwork.
async function importAssets(req, res) {
  try {
    const force = !!req.body?.force
    const approve = !!req.body?.approve
    // From the session, never the body — the same rule the in-game ops routes
    // apply, and for the same reason: this is recorded as who did it.
    const result = await assets.importAssets({ force, approve, by: req.user?.username ?? null })

    await activity.log({
      req,
      action: 'shard.assets.import',
      detail: {
        force,
        approve,
        status: result.status,
        code: result.code ?? null,
        assets: result.assets ?? null,
        fetched: result.fetched ?? null,
        written: result.written ?? null,
        removed: result.removed ?? null,
        // The body pass is logged as its own tally rather than as a single
        // number: `unknown` means the spawn files name a type this shard's
        // scripts do not define, which is real drift an operator should see, and
        // it reads identically to `failed` if both are summed into "not resolved".
        bodies: result.bodies?.tally ?? null,
        vanished: result.vanishedCount ?? null,
      },
    })

    return res.json(result)
  } catch (err) {
    log.error('importAssets', err)
    return res.status(500).json({ message: 'Internal Server Error' })
  }
}

// POST /admin/shard/assets/warm — run one item-art warm pass now.
//
// The pass runs on its own timer and needs no operator, so this exists for the
// two moments where waiting for the interval is the wrong answer: an operator who
// has just configured the bridge and wants to see it work, and one who has just
// patched their client and would rather not wait for pictures to refresh.
//
// `force` re-fetches keys the site already holds. The body import's `force` means
// the same thing for the same reason — a wiped uploads volume leaves every
// database row correct and every picture missing, and only an explicit re-fetch
// recovers it.
//
// It is bounded: one pass asks for at most `limit` keys, because the shard's
// asset plane serves one request at a time and a pass must not hold that slot
// against the operator's own import.
async function warmItemArt(req, res) {
  try {
    const force = !!req.body?.force
    const limit = Number.isFinite(Number(req.body?.limit)) ? Number(req.body.limit) : undefined
    const result = await itemArt.warm({ force, ...(limit ? { limit } : {}) })

    await activity.log({
      req,
      action: 'shard.assets.warm',
      detail: {
        force,
        limit: limit ?? null,
        status: result.status,
        code: result.code ?? null,
        wanted: result.wanted ?? null,
        asked: result.asked ?? null,
        written: result.written ?? null,
        remaining: result.remaining ?? null,
      },
    })

    return res.json(result)
  } catch (err) {
    log.error('warmItemArt', err)
    return res.status(500).json({ message: 'Internal Server Error' })
  }
}

module.exports = {
  getStatus,
  importAssets,
  warmItemArt,
}