import { Router } from 'express'
import { listPackKeys, loadPackDefinition, readManifest } from '../../shared/store.js'

export const indexRouter = Router()

indexRouter.get('/', async (_req, res, next) => {
  try {
    const manifest = await readManifest()
    const definitionMap = new Map<string, Awaited<ReturnType<typeof loadPackDefinition>>>()
    const keys = await listPackKeys()
    // 팩 정의를 병렬 로드(op.ts 와 동일 패턴). 순차 await 보다 빠름.
    const definitions = await Promise.all(keys.map((key) => loadPackDefinition(key)))
    keys.forEach((key, i) => definitionMap.set(key, definitions[i]))
    const packs = manifest.packs.map((entry) => ({
      name: entry.name,
      file: entry.file,
      definition: definitionMap.get(entry.file) ?? null
    }))
    res.render('index', { packs })
  } catch (error) {
    next(error)
  }
})