/**
 * Every group matching a pattern with its real span: LIST ACTIVE for the
 * names (its low is always 2 on Eweka), GROUP per group for the real low and
 * count. TSV, largest span first: rank, name, low, high, span, count.
 *
 *   node --env-file=.env --import=@poppinss/ts-exec tools/group_sizes.ts 'alt.binaries.*' [connections] > groups.tsv
 */
import { XoverClient } from '#lib/nntp/index'

const pattern = process.argv[2] ?? 'alt.binaries.*'
const connections = Number(process.argv[3] ?? 4)
const env = process.env
const connect = () =>
  XoverClient.connect({ host: env.NNTP_HOST!, port: Number(env.NNTP_PORT ?? 563), user: env.NNTP_USER, password: env.NNTP_PASSWORD, secure: (env.NNTP_SECURE ?? 'true') !== 'false', compress: true, timeoutMs: 60_000 })

const first = await connect()
const names = (await first.listActive(pattern)).map((g) => g.name)
const queue = [...names]
const out: { name: string; low: number; high: number; count: number }[] = []
await Promise.all(
  Array.from({ length: connections }, async (_, i) => {
    const client = i === 0 ? first : await connect()
    while (queue.length) {
      const name = queue.shift()!
      try {
        const g = await client.group(name)
        out.push({ name, ...g })
      } catch (error: any) {
        console.error(`${name}: ${error.message}`)
      }
    }
    client.close()
  })
)
out.sort((a, b) => b.high - b.low - (a.high - a.low))
out.forEach((g, i) => console.log([i + 1, g.name, g.low, g.high, g.high - g.low, g.count].join('\t')))