// Prueft, ob ein Repo-Branch ein dev-Skript in package.json hat (Dev-Modus nur dann sinnvoll).
import { giteaFetch, splitRepo } from './giteaClient.js'

export const cacheTtlMs = 60 * 1000
const cache = new Map()

export function clearDevScriptCache() { cache.clear() }

/** true = dev-Skript vorhanden, false = kein package.json oder kein dev-Skript, null = unbekannt (Gitea-Fehler). */
export async function repoHasDevScript(repoFullName, branch) {
  const key = `${repoFullName}@${branch}`
  const hit = cache.get(key)
  if (hit && Date.now() - hit.at < cacheTtlMs) return hit.value
  const value = await lookup(repoFullName, branch)
  cache.set(key, { at: Date.now(), value })
  return value
}

async function lookup(repoFullName, branch) {
  const [owner, repo] = splitRepo(repoFullName)
  if (!owner || !repo) return null
  let data
  try {
    data = await giteaFetch(`/repos/${owner}/${repo}/contents/package.json?ref=${encodeURIComponent(branch)}`)
  } catch (err) {
    return err?.status === 404 ? false : null
  }
  try {
    const pkg = JSON.parse(Buffer.from(data?.content || '', 'base64').toString('utf8'))
    const dev = pkg?.scripts?.dev
    return typeof dev === 'string' && dev.trim() !== ''
  } catch {
    return null
  }
}