import { describe, it, expect, beforeAll } from 'vitest'
import * as db from '../src/database.js'

const pubkey = 'reconfirm-test-' + Date.now()
const email = 'reconfirm-test-' + Date.now() + '@example.com'
let token: string

describe('Confirm link idempotency — already-confirmed token', () => {
  beforeAll(async () => {
    await db.migrate()
  })

  it('creates and confirms a subscription for the first time', async () => {
    const sub = await db.insertSubscription(pubkey, email, 'daily')
    expect(sub).toBeTruthy()
    token = sub.key

    const result = await db.confirmSubscription(token)
    expect(result).toBeTruthy()
    expect(result!.sub.confirmed_at).toBeTruthy()
    expect(result!.alreadyConfirmed).toBe(false)
  })

  it('returns a distinct result (not undefined) when confirming an already-confirmed token', async () => {
    // BUG: confirmSubscription used `WHERE confirmed_at IS NULL`, so
    // re-confirming an already-confirmed token matched zero rows and
    // the UPDATE returned nothing → parseSubscription returned undefined.
    // The caller then threw ActionError('invalid or expired') and the
    // user saw "Email not confirmed" — which is misleading.
    //
    // FIX: confirmSubscription now detects the already-confirmed case
    // and returns { sub, alreadyConfirmed: true } so the handler can
    // render an "already confirmed" info page instead of an error page.
    const result = await db.confirmSubscription(token)
    expect(result).not.toBeUndefined()
    expect(result!.alreadyConfirmed).toBe(true)
    expect(result!.sub.confirmed_at).toBeTruthy()
  })

  it('returns undefined for a nonexistent token', async () => {
    const result = await db.confirmSubscription('nonexistent-token-' + Date.now())
    expect(result).toBeUndefined()
  })
})