import AsyncStorage from '@react-native-async-storage/async-storage'
import {
  clearAllGenerationIdempotencyKeys,
  clearGenerationIdempotencyKey,
  getOrCreateGenerationIdempotencyKey,
} from '../src/features/templates/generation-idempotency'
import { uuidV4FromBytes } from '../src/lib/random-id'

const USER_ID = '11111111-1111-4111-8111-111111111111'
const OTHER_USER_ID = '22222222-2222-4222-8222-222222222222'
const MEETING_ID = '33333333-3333-4333-8333-333333333333'
const TEMPLATE_ID = '44444444-4444-4444-8444-444444444444'

describe('meeting document generation idempotency', () => {
  beforeEach(async () => {
    await AsyncStorage.clear()
  })

  it('formats random bytes as an RFC 4122 version 4 UUID', () => {
    expect(uuidV4FromBytes(Uint8Array.from({ length: 16 }, (_, index) => index)))
      .toBe('00010203-0405-4607-8809-0a0b0c0d0e0f')
  })

  it('reuses a pending key across retries and clears it only after commit', async () => {
    const first = await getOrCreateGenerationIdempotencyKey(USER_ID, MEETING_ID, TEMPLATE_ID)
    const retry = await getOrCreateGenerationIdempotencyKey(USER_ID, MEETING_ID, TEMPLATE_ID)
    expect(retry).toBe(first)

    await clearGenerationIdempotencyKey(USER_ID, MEETING_ID, TEMPLATE_ID)
    const nextOperation = await getOrCreateGenerationIdempotencyKey(USER_ID, MEETING_ID, TEMPLATE_ID)
    expect(nextOperation).not.toBe(first)
  })

  it('purges only the requested account pending keys', async () => {
    const own = await getOrCreateGenerationIdempotencyKey(USER_ID, MEETING_ID, TEMPLATE_ID)
    const other = await getOrCreateGenerationIdempotencyKey(OTHER_USER_ID, MEETING_ID, TEMPLATE_ID)
    await clearAllGenerationIdempotencyKeys(USER_ID)

    const recreated = await getOrCreateGenerationIdempotencyKey(USER_ID, MEETING_ID, TEMPLATE_ID)
    const otherRetry = await getOrCreateGenerationIdempotencyKey(OTHER_USER_ID, MEETING_ID, TEMPLATE_ID)
    expect(recreated).not.toBe(own)
    expect(otherRetry).toBe(other)
  })
})