#!/usr/bin/env node
/**
 * Maintainer utility: emit a mirror-drive experiment plan/hints JSON.
 * Non-destructive: this script does not mutate Corestores.
 *
 * Usage:
 *   node scripts/mirror-drive-experiment.mjs --source-key <hex> [--mirror-key <hex>] [--aux 2]
 */
import process from 'node:process'

function arg(name, def = '') {
  const i = process.argv.indexOf(name)
  if (i === -1 || i + 1 >= process.argv.length) return def
  return String(process.argv[i + 1] || '')
}

const sourceKey = arg('--source-key', '').trim()
const mirrorKey = arg('--mirror-key', '').trim()
const aux = Math.max(0, Number.parseInt(arg('--aux', '0'), 10) || 0)

if (!/^[a-f0-9]{64}$/i.test(sourceKey)) {
  console.error(
    'mirror-drive-experiment: --source-key must be a 64-hex Hyperdrive key'
  )
  process.exit(2)
}

const out = {
  schema: 1,
  tool: 'mirror-drive-experiment',
  sourceKeyHex: sourceKey.toLowerCase(),
  mirrorKeyHex: /^[a-f0-9]{64}$/i.test(mirrorKey) ? mirrorKey.toLowerCase() : '',
  auxiliaryCountHint: aux,
  envHints: {
    BARE_OS_MIRROR_READ_KEY: /^[a-f0-9]{64}$/i.test(mirrorKey)
      ? mirrorKey.toLowerCase()
      : sourceKey.toLowerCase(),
    BARE_OS_MIRROR_DRIVE_COMPOSITION_HINT_JSON: JSON.stringify({
      schema: 1,
      mirrorDrivePattern: 'single-primary-plus-aux',
      auxiliaryCountHint: aux,
      sourceKeyHex: sourceKey.toLowerCase()
    })
  },
  note: 'Local experiment hints only; apply env vars manually when launching booter/seeder.'
}

process.stdout.write(JSON.stringify(out, null, 2) + '\n')