import { describe, it, expect } from 'vitest'
import { getDeviceHashIdentifier } from '../../../app/utils/device_utils.js'

describe('getDeviceHashIdentifier', () => {
  it('returns a 24-char hex string', () => {
    const hash = getDeviceHashIdentifier({ oui: 'F8B7FF', productClass: 'Livebox', serialNumber: 'SN001' })
    expect(hash).toHaveLength(24)
    expect(hash).toMatch(/^[0-9a-f]{24}$/)
  })

  it('is deterministic', () => {
    const a = getDeviceHashIdentifier({ oui: 'A', productClass: 'B', serialNumber: 'C' })
    const b = getDeviceHashIdentifier({ oui: 'A', productClass: 'B', serialNumber: 'C' })
    expect(a).toBe(b)
  })

  it('different inputs produce different hashes', () => {
    const a = getDeviceHashIdentifier({ oui: 'A', productClass: 'B', serialNumber: 'C' })
    const b = getDeviceHashIdentifier({ oui: 'A', productClass: 'B', serialNumber: 'D' })
    expect(a).not.toBe(b)
  })

  it('includes manufacturer when provided', () => {
    const withMfr = getDeviceHashIdentifier({ manufacturer: 'Sagemcom', oui: 'A', productClass: 'B', serialNumber: 'C' })
    const withoutMfr = getDeviceHashIdentifier({ oui: 'A', productClass: 'B', serialNumber: 'C' })
    expect(withMfr).not.toBe(withoutMfr)
  })
})