import { describe, it, expect } from 'vitest'
import {
  attemptKey,
  evaluateAttempts,
  DEFAULT_MAX_ATTEMPTS,
  DEFAULT_WINDOW_MS,
} from '../src/bruteforce.js'

describe('attemptKey', () => {
  it('normalizes email and joins ip', () => {
    expect(attemptKey('  A@B.com ', '1.2.3.4')).toBe('a@b.com|1.2.3.4')
  })
  it('omits ip when absent', () => {
    expect(attemptKey('a@b.com')).toBe('a@b.com')
  })
})

describe('evaluateAttempts', () => {
  it('not locked below threshold', () => {
    const r = evaluateAttempts({ recentCount: DEFAULT_MAX_ATTEMPTS - 1 })
    expect(r.locked).toBe(false)
    expect(r.retryAfterMs).toBe(0)
  })

  it('locked at threshold, retryAfter = full window without oldestAt', () => {
    const r = evaluateAttempts({ recentCount: DEFAULT_MAX_ATTEMPTS })
    expect(r.locked).toBe(true)
    expect(r.retryAfterMs).toBe(DEFAULT_WINDOW_MS)
  })

  it('precise retryAfter when oldestAt given', () => {
    const now = 1_000_000
    const oldestAt = now - 60_000
    const windowMs = 100_000
    const r = evaluateAttempts({ recentCount: 5, maxAttempts: 5, windowMs, oldestAt, now })
    expect(r.locked).toBe(true)
    expect(r.retryAfterMs).toBe(40_000)
  })

  it('clamps retryAfter to 0 when oldest already aged out', () => {
    const now = 1_000_000
    const r = evaluateAttempts({
      recentCount: 5,
      maxAttempts: 5,
      windowMs: 10_000,
      oldestAt: now - 50_000,
      now,
    })
    expect(r.retryAfterMs).toBe(0)
  })

  it('respects custom maxAttempts', () => {
    expect(evaluateAttempts({ recentCount: 2, maxAttempts: 3 }).locked).toBe(false)
    expect(evaluateAttempts({ recentCount: 3, maxAttempts: 3 }).locked).toBe(true)
  })
})