/**
 * profile-meta.mjs — the per-profile fields a host reads from <profile>.meta.json, in ONE place.
 *
 * generate-tree (the built manifest.json) and the dev server's /__plugin-gallery/manifest.json both call
 * this, so the dev Studio and the built Studio cannot disagree (rega: the corner widget never mounted in
 * dev because only the built manifest carried "widget").
 *   stage   "production" | "experimental"   default experimental
 *   heavy   true when the element holds live WebGL contexts
 *   widget  { corner } for a corner widget the Plugin Studio mounts once, fixed
 */
import { readFileSync } from 'node:fs'
import { join } from 'node:path'

const CORNERS = ['bottom-right', 'bottom-left', 'top-right', 'top-left']

export function readProfileMeta(dir, profileName) {
  try {
    const meta = JSON.parse(readFileSync(join(dir, `${profileName}.meta.json`), 'utf8'))
    const corner = meta?.widget?.corner
    // The plugin's own display name (label, or title / displayName): what the Plugin Studio rail calls it.
    const name = [meta?.label, meta?.title, meta?.displayName].find((v) => typeof v === 'string' && v.trim())
    return {
      stage: meta?.stage === 'production' ? 'production' : 'experimental',
      heavy: meta?.heavy === true,
      widget: CORNERS.includes(corner) ? { corner } : null,
      label: name ? name.trim() : '',
    }
  } catch { return { stage: 'experimental', heavy: false, widget: null, label: '' } }
}

/** The optional manifest keys for one profile (stage always; heavy / widget only when set). */
export function profileMetaFields(dir, profileName) {
  const m = readProfileMeta(dir, profileName)
  return { stage: m.stage, ...(m.label ? { label: m.label } : {}), ...(m.heavy ? { heavy: true } : {}), ...(m.widget ? { widget: m.widget } : {}) }
}

/** A bundle is production if ANY of its profiles says so. */
export const bundleStage = (profiles) => (profiles.some((p) => p.stage === 'production') ? 'production' : 'experimental')