/**
 * The freight ⇄ payment happy path, end to end through both services.
 *
 *   portal pays invoice
 *     → freight billing.payInvoice → payment API /payments/initiate
 *     → CBE Birr provider → gateway mock (intent opened, invoice.payment_id set)
 *   gateway calls back (correctly signed)
 *     → payment API webhook pipeline → intent SUCCEEDED → outbox row
 *     → RabbitMQ → freight consumer → settleByPaymentId
 *     → invoice PAID → booking.invoice.paid → booking advances
 *
 * Nothing here is stubbed except the bank itself.
 */
import { afterAll, beforeAll, describe, expect, it } from "vitest";
import {
  closeDb,
  customerA,
  db,
  gateway,
  intentByMerchantOrderId,
  poll,
} from "./client";
import {
  createImportSchedule,
  currentInvoice,
  departureAt,
  ensureCorridorRoute,
  releaseUnpaidHolds,
  forceWindowOpen,
  freightPayment,
  gatewayIntent,
  invoiceForBooking,
  payInvoice,
  prepareBooking,
  resetCorridorDay,
  runBatch,
  type ReadyBooking,
} from "./flows";

const DEPARTURE = departureAt(4);
const STAMP = String(Date.now());

describe("freight invoice settles through the real payment service", () => {
  let booking: ReadyBooking;
  let invoiceId: string;

  beforeAll(async () => {
    await gateway.reset();
    await releaseUnpaidHolds();
    await ensureCorridorRoute();
    await resetCorridorDay(DEPARTURE);
    const schedule = await createImportSchedule({ departure: DEPARTURE });
    await forceWindowOpen(schedule.id, 45);

    booking = await prepareBooking({
      suffix: "PAY1",
      departure: DEPARTURE,
      runStamp: STAMP,
      isoSeed: 0,
      twenty: 2,
    });
    await runBatch(schedule.id);
    invoiceId = (await invoiceForBooking(booking.bookingId)).id;
  });

  afterAll(closeDb);

  it("opens a gateway intent and links it to the invoice", async () => {
    const res = await payInvoice(invoiceId, { method: "CBE_BIRR" });
    expect(res.status, JSON.stringify(res.body)).toBeLessThanOrEqual(201);

    const intent = await gatewayIntent(booking.bookingId);
    expect(intent.provider).toBe("CBE_BIRR");
    expect(intent.status).toBe("REQUIRES_ACTION");
    expect(intent.merchant_order_id).toBeTruthy();

    // The invoice must carry the intent id BEFORE any callback can arrive —
    // settlement correlates on it (billing.service.ts payInvoice).
    const invoice = await currentInvoice(invoiceId);
    expect(invoice.payment_id).toBeTruthy();

    // Freight's local projection of the same intent.
    const projection = await freightPayment(invoice.payment_id!);
    expect(projection.status).toBe("action-required");
    expect(projection.merchant_order_id).toBe(intent.merchant_order_id);

    // Freight deliberately sends a dev-shortcut amount for non-CBE_BILL
    // providers (payment.service.ts:238-247) — 1 minor unit, not the invoice
    // total. Asserted, not "fixed": changing it is a product decision.
    expect(Number(intent.amount_minor)).toBe(1);
  });

  it("settles the invoice and advances the booking when the gateway calls back", async () => {
    const intent = await gatewayIntent(booking.bookingId);
    const res = await gateway.webhook({ merchantOrderId: intent.merchant_order_id });
    expect(res.body.delivered).toBe(200);

    const settled = await poll<{ status: string }>(
      "payment intent SUCCEEDED",
      `SELECT status FROM edr_payment.payment_intent WHERE id = $1`,
      [intent.id],
      (row) => row?.status === "SUCCEEDED",
      { attempts: 20, intervalMs: 1000 },
    );
    expect(settled.status).toBe("SUCCEEDED");

    // The outbox row is written in the SAME transaction as the intent update
    // and relayed to RabbitMQ by the relay loop.
    const outbox = await poll<{ status: string; attempts: number }>(
      "outbox row relayed",
      `SELECT status, attempts FROM edr_payment.notification_outbox
       WHERE intent_id = $1 AND event_type = 'payment.succeeded'`,
      [intent.id],
      (row) => row?.status === "SENT",
      { attempts: 20, intervalMs: 1000 },
    );
    expect(outbox.status).toBe("SENT");

    // …and freight, on the other end of the broker, settles the invoice.
    const invoice = await poll<{ status: string; paid_amount: string; balance_amount: string }>(
      "invoice PAID",
      `SELECT status, paid_amount, balance_amount FROM freight.invoices WHERE id = $1`,
      [invoiceId],
      (row) => row?.status === "PAID",
      { attempts: 30, intervalMs: 2000 },
    );
    expect(Number(invoice.balance_amount)).toBe(0);
    expect(Number(invoice.paid_amount)).toBeGreaterThan(0);

    const booked = await poll<{ status: string }>(
      "booking advanced on payment",
      `SELECT status FROM freight.bookings WHERE id = $1`,
      [booking.bookingId],
      (row) => row?.status === "PAID",
      { attempts: 20, intervalMs: 2000 },
    );
    expect(booked.status).toBe("PAID");
  });

  it("records exactly one intent, one webhook event and one ledger entry", async () => {
    const intent = await gatewayIntent(booking.bookingId);
    const intents = await intentByMerchantOrderId(intent.merchant_order_id);
    expect(intents.length).toBe(1);

    const [{ n }] = await db<{ n: string }>(
      `SELECT count(*)::text AS n FROM edr_payment.payment_webhook_event
       WHERE merchant_order_id = $1`,
      [intent.merchant_order_id],
    );
    expect(Number(n)).toBe(1);

    const invoice = await currentInvoice(invoiceId);
    const ledger = (invoice.payments ?? []) as unknown[];
    expect(Array.isArray(ledger) ? ledger.length : 0).toBe(1);
  });

  it("is idempotent — a replayed callback changes nothing", async () => {
    const intent = await gatewayIntent(booking.bookingId);
    const before = await currentInvoice(invoiceId);

    // Same orderId ⇒ same externalEventId ⇒ deduped at the webhook table.
    await gateway.webhook({
      merchantOrderId: intent.merchant_order_id,
      eventId: `CBEORD-${intent.merchant_order_id}`,
    });
    await new Promise((r) => setTimeout(r, 3000));

    const after = await currentInvoice(invoiceId);
    expect(after.status).toBe("PAID");
    expect(after.paid_amount).toBe(before.paid_amount);
    expect((after.payments as unknown[]).length).toBe((before.payments as unknown[]).length);
  });

  it("refuses a second payment on an already-paid invoice", async () => {
    const res = await payInvoice(invoiceId, { method: "CBE_BIRR", as: customerA });
    expect(res.status).toBeGreaterThanOrEqual(400);
  });
});