/**
 * BULK B2 — break-bulk PER_ITEM wagon math on the CW4 fleet (70 T capacity).
 *
 * Cargo from seed-bulk-items.sql:
 *   E2E_IMP_AUTO     automobiles — items-per-wagon floor of 4
 *   E2E_IMP_MACHINE  machinery — no floor, tonnage-only fallback
 *
 * Three verdicts of the wagon-demand rule, end to end:
 *   BA1  16 autos @2.5 T (40 T)     → the floor binds:     4 wagons (tonnage said 1)
 *   BA2  12 machines @20 T (240 T)  → tonnage binds: 3/wagon → 4 wagons
 *   BA3  216 autos (540 T)          → exactly 54 wagons: FULL from one booking, no split
 */
import { afterAll, beforeAll, describe, expect, it } from "vitest";
import { closeDb, gateway } from "./client";
import {
  bookBulkItemsReady,
  bookingRow,
  closeBookingWindow,
  completeDocReview,
  createSchedule,
  departureAt,
  eatDayStr,
  endPaymentPhase,
  ensureCorridorRoute,
  extendPayWindow,
  expectWagonType,
  forceWindowOpen,
  payViaGateway,
  pollAllocations,
  pollBookingStatus,
  pollWindow,
  releaseUnpaidHolds,
  resetCorridorDay,
  seedTenantContracts,
} from "./flows";

const DEPARTURE = departureAt(41);
const BOOKING_DAY = eatDayStr(DEPARTURE);
const FULL_DEPARTURE = departureAt(42);
const FULL_DAY = eatDayStr(FULL_DEPARTURE);
const STAMP = String(Date.now());

describe("bulk b2: PER_ITEM floor vs tonnage wagon math", () => {
  const booking = new Map<string, string>();
  let contracts: Map<string, string>;
  let scheduleId: string;

  beforeAll(async () => {
    await gateway.reset();
    await releaseUnpaidHolds();
    await ensureCorridorRoute();
    await resetCorridorDay(DEPARTURE);
    await resetCorridorDay(FULL_DEPARTURE);

    contracts = await seedTenantContracts(
      STAMP,
      ["BA1", "BA2", "BA3"].map((suffix) => ({ suffix, freight: "BULK" as const })),
    );
    scheduleId = (
      await createSchedule({
        departure: DEPARTURE,
        kind: "bulk",
        locoPair: ["LOCO-IMP-15", "LOCO-IMP-16"],
      })
    ).id;
    await forceWindowOpen(scheduleId, 60);

    booking.set(
      "BA1",
      await bookBulkItemsReady({
        contractId: contracts.get("BA1")!,
        cargoCode: "E2E_IMP_AUTO",
        items: 16,
        tons: 40,
        scheduledDate: BOOKING_DAY,
      }),
    );
    booking.set(
      "BA2",
      await bookBulkItemsReady({
        contractId: contracts.get("BA2")!,
        cargoCode: "E2E_IMP_MACHINE",
        items: 12,
        tons: 240,
        scheduledDate: BOOKING_DAY,
      }),
    );
  }, 1_800_000);

  afterAll(closeDb);

  it("the 4-per-wagon floor binds for 16 autos → 4 CW4 wagons, not 1", async () => {
    await closeBookingWindow(scheduleId);
    await completeDocReview(scheduleId);
    for (const suffix of ["BA1", "BA2"]) {
      await pollBookingStatus(booking.get(suffix)!, ["SELECTED_FOR_BATCH", "AWAITING_PAYMENT"]);
    }

    await extendPayWindow(scheduleId, [booking.get("BA1")!, booking.get("BA2")!]);
    await payViaGateway(booking.get("BA1")!);
    await pollAllocations(booking.get("BA1")!, 4);
    await expectWagonType(booking.get("BA1")!, "CW4", 4);
  });

  it("machinery has no floor — 12 items @20 T take 4 wagons on tonnage alone", async () => {
    await payViaGateway(booking.get("BA2")!);
    await pollAllocations(booking.get("BA2")!, 4);
    await expectWagonType(booking.get("BA2")!, "CW4", 4);
  });

  it("216 autos = exactly 54 wagons: FULL from one break-bulk booking, no split", async () => {
    const fullSchedule = await createSchedule({
      departure: FULL_DEPARTURE,
      kind: "bulk",
      locoPair: ["LOCO-IMP-25", "LOCO-IMP-26"],
    });
    await forceWindowOpen(fullSchedule.id, 45);

    const ba3 = await bookBulkItemsReady({
      contractId: contracts.get("BA3")!,
      cargoCode: "E2E_IMP_AUTO",
      items: 216,
      tons: 540,
      scheduledDate: FULL_DAY,
    });
    await closeBookingWindow(fullSchedule.id);
    await completeDocReview(fullSchedule.id);
    await pollBookingStatus(ba3, ["SELECTED_FOR_BATCH", "AWAITING_PAYMENT"]);

    await payViaGateway(ba3);
    await pollAllocations(ba3, 54);
    expect((await bookingRow(ba3)).is_split, "BA3 rides whole, not split").not.toBe(true);

    await endPaymentPhase(fullSchedule.id);
    await pollWindow(
      fullSchedule.id,
      (s) => s.booking_window_status === "FULL" && s.window_phase === "DONE",
      "FULL + DONE",
    );
  }, 900_000);
});