// apps/hq/test/scheduler-scan.test.ts
import { describe, it, expect } from 'vitest'
import { openDb } from '../src/db'
import { seedIfEmpty } from '../src/seed'
import { createClient } from '../src/repos-clients'
import { assignModule, createModule, setPrice, updateClientModule } from '../src/repos-modules'
import { createDraft, issueDocument } from '../src/repos-documents'
import { createAmc } from '../src/repos-amc'
import { createInteraction } from '../src/repos-interactions'
import { listReminders } from '../src/repos-reminders'
import { runDailyScan, type ScanDeps } from '../src/scheduler'

const deps: ScanDeps = {
  gmail: { f: (async () => new Response('{}')) as typeof fetch, clientId: '', clientSecret: '', keyHex: '' },
  renderPdf: async () => Buffer.from('%PDF-'), company: () => ({ 'company.name': 'Tecnostac' }),
  now: () => '2026-07-10T00:00:00Z',
}

function world() {
  const db = openDb(':memory:'); seedIfEmpty(db)
  const c = createClient(db, 'u1', { name: 'Acme', stateCode: '32', contacts: [{ name: 'R', email: 'r@acme.in' }] })
  const m = createModule(db, 'u1', { code: 'POS', name: 'POS' })
  setPrice(db, 'u1', { moduleId: m.id, kind: 'yearly', pricePaise: 10_000_00, effectiveFrom: '2026-01-01' })
  return { db, c, m }
}

describe('runDailyScan — detection rules', () => {
  it('raises overdue, renewal, amc and follow-up reminders, and is idempotent', async () => {
    const { db, c, m } = world()
    // Overdue invoice: issued 2026-06-01, unpaid, > 7 days before 2026-07-10.
    const inv = issueDocument(db, 'u1', createDraft(db, 'u1', { docType: 'INVOICE', clientId: c.id, lines: [{ moduleId: m.id, qty: 1, kind: 'yearly' }] }).id)
    db.prepare(`UPDATE document SET doc_date='2026-06-01' WHERE id=?`).run(inv.id)
    // Renewal within 15 days.
    const cm = assignModule(db, 'u1', { clientId: c.id, moduleId: m.id, kind: 'yearly' })
    updateClientModule(db, 'u1', cm.id, { nextRenewal: '2026-07-20' })
    // AMC expiring within 30 days.
    createAmc(db, 'u1', { clientId: c.id, coverage: 'Support', periodFrom: '2025-08-01', periodTo: '2026-08-01', amountPaise: 20_000_00 })
    // Follow-up due.
    createInteraction(db, 'u1', { clientId: c.id, typeCode: 'call', onDate: '2026-07-01', followUpOn: '2026-07-09' })

    const res = await runDailyScan(db, deps, '2026-07-10')
    expect(res.created['invoice_overdue']).toBe(1)
    expect(res.created['renewal_due']).toBe(1)
    expect(res.created['amc_expiring']).toBe(1)
    expect(res.created['follow_up']).toBe(1)
    expect(listReminders(db, { status: 'queued' })).toHaveLength(4)

    // Re-run same day → the idempotency key blocks every duplicate.
    const again = await runDailyScan(db, deps, '2026-07-10')
    expect(Object.values(again.created).reduce((a, b) => a + b, 0)).toBe(0)
    expect(listReminders(db, {})).toHaveLength(4)
  })
  it('does not raise a reminder for an invoice that is not yet overdue', async () => {
    const { db, c, m } = world()
    const inv = issueDocument(db, 'u1', createDraft(db, 'u1', { docType: 'INVOICE', clientId: c.id, lines: [{ moduleId: m.id, qty: 1, kind: 'yearly' }] }).id)
    db.prepare(`UPDATE document SET doc_date='2026-07-08' WHERE id=?`).run(inv.id) // only 2 days old
    const res = await runDailyScan(db, deps, '2026-07-10')
    expect(res.created['invoice_overdue'] ?? 0).toBe(0)
  })
})