// apps/hq/test/bounces.test.ts
import { describe, it, expect } from 'vitest'
import { openDb } from '../src/db'
import { seedIfEmpty } from '../src/seed'
import { saveAccount, logEmail } from '../src/repos-email'
import { encrypt } from '../src/crypto'
import { listReminders } from '../src/repos-reminders'
import { pollBounces, type BounceDeps } from '../src/bounces'

const KEY = '11'.repeat(32)

function bounceFetch(recipient: string): typeof fetch {
  return (async (url: string) => {
    const u = String(url)
    if (u.includes('/token')) return new Response(JSON.stringify({ access_token: 'at' }), { status: 200 })
    if (u.includes('/messages/b1')) {
      return new Response(JSON.stringify({
        snippet: `Delivery to ${recipient} failed permanently`,
        payload: { headers: [{ name: 'X-Failed-Recipients', value: recipient }] },
      }), { status: 200 })
    }
    return new Response(JSON.stringify({ messages: [{ id: 'b1' }] }), { status: 200 }) // list
  }) as typeof fetch
}

describe('pollBounces', () => {
  it('flips the sent email_log to bounced and raises an email_bounced reminder, idempotently', async () => {
    const db = openDb(':memory:'); seedIfEmpty(db)
    saveAccount(db, 'us@tecnostac.com', encrypt('rt', KEY))
    logEmail(db, { to: 'ravi@acme.in', subject: 'INV/26-27-0001', status: 'sent', gmailMessageId: 'g1' })
    const deps: BounceDeps = {
      gmail: { f: bounceFetch('ravi@acme.in'), clientId: 'cid', clientSecret: 'sec', keyHex: KEY },
      now: () => '2026-07-10T00:00:00Z',
    }
    const out = await pollBounces(db, deps)
    expect(out).toEqual({ scanned: 1, bounced: 1 })
    expect(db.prepare(`SELECT bounced FROM email_log WHERE to_addr='ravi@acme.in'`).get()).toMatchObject({ bounced: 1 })
    expect(listReminders(db, { ruleKind: 'email_bounced' })).toHaveLength(1)
    // Re-poll: the row is already bounced=0→1, so nothing new flips and no duplicate reminder.
    const again = await pollBounces(db, deps)
    expect(again.bounced).toBe(0)
    expect(listReminders(db, { ruleKind: 'email_bounced' })).toHaveLength(1)
  })
  it('no-ops cleanly when Gmail is not connected', async () => {
    const db = openDb(':memory:'); seedIfEmpty(db)
    const deps: BounceDeps = { gmail: { f: bounceFetch('x@y.z'), clientId: '', clientSecret: '', keyHex: KEY }, now: () => '2026-07-10T00:00:00Z' }
    expect(await pollBounces(db, deps)).toEqual({ scanned: 0, bounced: 0 })
  })
})