import { afterEach, describe, expect, it, vi } from 'vitest'
import { mkdtemp, mkdir, rm, writeFile } from 'fs/promises'
import { tmpdir } from 'os'
import { join } from 'path'
import { performance } from 'perf_hooks'

vi.mock('../../packages/server/src/services/hermes/hermes-process', () => ({
  execHermesWithBin: vi.fn(() => { throw new Error('Inventory must not invoke CLI') }),
  spawnHermesWithBin: vi.fn(),
}))
import { listProfilesSnapshot } from '../../packages/server/src/services/hermes/hermes-cli'
import { execHermesWithBin } from '../../packages/server/src/services/hermes/hermes-process'

const originalHome = process.env.HERMES_HOME
let home: string | undefined

afterEach(async () => {
  if (originalHome === undefined) delete process.env.HERMES_HOME
  else process.env.HERMES_HOME = originalHome
  if (home) await rm(home, { recursive: true, force: true })
})

describe('disk profile inventory', () => {
  it('reads models and active selection for 20 profiles without scanning histories or skills', async () => {
    home = await mkdtemp(join(tmpdir(), 'hermes-profile-snapshot-'))
    process.env.HERMES_HOME = home
    await writeFile(join(home, 'config.yaml'), 'model: default-model\n')
    await writeFile(join(home, 'active_profile'), 'perf-19\n')
    for (let index = 0; index < 20; index++) {
      const dir = join(home, 'profiles', `perf-${index}`)
      await mkdir(dir, { recursive: true })
      await writeFile(join(dir, 'config.yaml'), `model:\n  default: model-${index}\n`)
      // These are deliberately invalid; inventory must not parse session history.
      await writeFile(join(dir, 'state.db'), 'not a database')
    }
    const started = performance.now()
    const profiles = listProfilesSnapshot()
    console.info(`Disk inventory for 21 profiles: ${(performance.now() - started).toFixed(2)} ms`)
    expect(profiles).toHaveLength(21)
    expect(profiles.find(profile => profile.name === 'perf-19')).toMatchObject({ model: 'model-19', active: true })
    expect(profiles[0]).toMatchObject({ name: 'default', model: 'default-model', active: false })
    expect(execHermesWithBin).not.toHaveBeenCalled()
  })
})