/**
 * Promised against happened.
 *
 * The rows below are copied from production (tenant 916, 29 August 2026) rather
 * than invented, because every awkward thing this module exists to handle is
 * something the live data does and a hand-written fixture would not: a
 * `starttime` later than `arrivaltime`, an `actualkms` identical to `kms`, a
 * `riderkms` of 0.0026, and a promise written in twelve-hour time.
 */
import assert from 'node:assert/strict';
import { test } from 'node:test';
import type { DeliveryRow } from '@/api/types';
import { compare, journeyOf, lateness, parsePromise, span } from './plannedVsActual';

/** One batch of four, assigned together — the rows that revealed the ladder. */
const BATCH: DeliveryRow[] = [
  {
    deliveryid: 1,
    orderid: '916-1',
    ridername: 'Varun',
    orderstatus: 'delivered',
    assigntime: '2026-08-29 11:22:36',
    arrivaltime: '2026-08-29 12:37:26',
    pickuptime: '2026-08-29 12:41:20',
    starttime: '2026-08-29 13:16:23',
    deliverytime: '2026-08-29 13:16:57',
    expecteddeliverytime: '2026-08-29 01:00 PM',
    kms: '6',
    actualkms: '6.0',
    riderkms: '4.2',
  },
  {
    deliveryid: 2,
    orderid: '916-2',
    ridername: 'Varun',
    orderstatus: 'delivered',
    assigntime: '2026-08-29 11:22:36',
    arrivaltime: '2026-08-29 12:37:29',
    pickuptime: '2026-08-29 12:41:21',
    starttime: '2026-08-29 13:17:19',
    deliverytime: '2026-08-29 13:38:26',
    expecteddeliverytime: '2026-08-29 01:30 PM',
    kms: '8',
    actualkms: '8.0',
    riderkms: '6.1',
  },
  {
    deliveryid: 3,
    orderid: '916-3',
    ridername: 'Varun',
    orderstatus: 'delivered',
    assigntime: '2026-08-29 11:22:36',
    arrivaltime: '2026-08-29 12:37:30',
    pickuptime: '2026-08-29 12:41:23',
    starttime: '2026-08-29 13:38:37',
    deliverytime: '2026-08-29 13:44:14',
    expecteddeliverytime: '2026-08-29 01:20 PM',
    kms: '2',
    actualkms: '2.0',
    // A failed GPS reading, exactly as production sends it.
    riderkms: '0.0026',
  },
  {
    deliveryid: 4,
    orderid: '916-4',
    ridername: 'Varun',
    orderstatus: 'delivered',
    assigntime: '2026-08-29 11:22:36',
    arrivaltime: '2026-08-29 12:37:33',
    pickuptime: '2026-08-29 12:41:26',
    starttime: '2026-08-29 13:44:56',
    deliverytime: '2026-08-29 13:59:19',
    expecteddeliverytime: '2026-08-29 02:10 PM',
    kms: '6',
    actualkms: '6.0',
    riderkms: '5.5',
  },
];

/* ── Reading one delivery ────────────────────────────────────────────────── */

// The whole point. Read in column order the ladder gives negative steps; read
// as assign → arrive → pickup → start → deliver every step is positive.
test('every step of the ladder is a positive duration', () => {
  for (const row of BATCH) {
    for (const step of journeyOf(row).steps) {
      assert.ok(step.ms !== null && step.ms >= 0, `${row.orderid} ${step.key} was ${step.ms}`);
    }
  }
});

test('the steps mean what the ladder says they mean', () => {
  const journey = journeyOf(BATCH[1] as DeliveryRow);
  const of = (key: string) => journey.steps.find((step) => step.key === key)!.ms!;
  // 11:22:36 → 12:37:29
  assert.equal(Math.round(of('toShop') / 60_000), 75);
  // 12:37:29 → 12:41:21
  assert.equal(Math.round(of('counter') / 60_000), 4);
  // 12:41:21 → 13:17:19, waiting while the first drop was done
  assert.equal(Math.round(of('inRound') / 60_000), 36);
  // 13:17:19 → 13:38:26
  assert.equal(Math.round(of('onRoad') / 60_000), 21);
});

// A round's first drop gets its `starttime` written moments before delivery.
test("a round's first drop is flagged rather than believed", () => {
  assert.equal(journeyOf(BATCH[0] as DeliveryRow).isFirstLeg, true, '34 seconds is not a ride');
  assert.equal(journeyOf(BATCH[1] as DeliveryRow).isFirstLeg, false);
});

// `actualkms` equals `kms` to the decimal on 498 of 498 production rows. Showing
// it as "actual" would draw two identical bars and call the round perfect.
test('the measured distance is riderkms, never actualkms', () => {
  const journey = journeyOf(BATCH[1] as DeliveryRow);
  assert.equal(journey.plannedKm, 8);
  assert.equal(journey.riddenKm, 6.1, 'actualkms (8.0) was used as the measurement');
});

test('a GPS reading of three metres is treated as absent, not as a short trip', () => {
  const journey = journeyOf(BATCH[2] as DeliveryRow);
  assert.equal(journey.riddenKm, null);
  assert.equal(journey.plannedKm, 2, 'the plan is still known');
});

test('a stamp written out of order leaves a blank, not a negative bar', () => {
  const journey = journeyOf({
    deliveryid: 9,
    assigntime: '2026-08-29 13:00:00',
    arrivaltime: '2026-08-29 12:00:00',
    pickuptime: '2026-08-29 12:05:00',
  } as DeliveryRow);
  assert.equal(journey.steps.find((step) => step.key === 'toShop')!.ms, null);
  assert.equal(journey.steps.find((step) => step.key === 'counter')!.ms, 5 * 60_000);
});

test('a delivery nobody has finished has a blank total, not a running one', () => {
  const journey = journeyOf({
    deliveryid: 9,
    assigntime: '2026-08-29 13:00:00',
    orderstatus: 'pending',
  } as DeliveryRow);
  assert.equal(journey.totalMs, null);
  assert.equal(journey.lateMs, null);
  assert.equal(journey.steps.every((step) => step.ms === null), true);
});

/* ── The promise ─────────────────────────────────────────────────────────── */

// The fourth timestamp format Fiesta sends, and the only twelve-hour one. Only
// the ISO format is specified; a meridiem string is implementation-defined, so
// this is pinned against an explicitly constructed instant rather than against
// whatever the running engine happens to do with the same string.
test('a twelve-hour promise is read as the instant it names', () => {
  assert.equal(parsePromise('2026-08-29 07:27 PM'), Date.parse('2026-08-29T19:27:00'));
});

test('midnight and noon do not swap', () => {
  assert.equal(parsePromise('2026-08-29 12:15 AM'), Date.parse('2026-08-29T00:15:00'));
  assert.equal(parsePromise('2026-08-29 12:15 PM'), Date.parse('2026-08-29T12:15:00'));
});

test('a twenty-four-hour promise is read too, so a format change does not blank the panel', () => {
  assert.equal(parsePromise('2026-08-29 19:27:30'), Date.parse('2026-08-29T19:27:30'));
});

test('no promise, or an unreadable one, is null rather than a guess', () => {
  assert.equal(parsePromise(''), null);
  assert.equal(parsePromise(undefined), null);
  assert.equal(parsePromise('soon'), null);
});

test('lateness is measured against the promise, either way', () => {
  // Promised 01:00 PM, delivered 13:16:57.
  assert.ok(journeyOf(BATCH[0] as DeliveryRow).lateMs! > 16 * 60_000);
  // Promised 02:10 PM, delivered 13:59:19 — early.
  assert.ok(journeyOf(BATCH[3] as DeliveryRow).lateMs! < 0);
});

/* ── Many journeys ───────────────────────────────────────────────────────── */

test('the summary counts what was promised and what landed on time', () => {
  const result = compare(BATCH);
  assert.equal(result.journeys, 4);
  assert.equal(result.promised, 4);
  assert.equal(result.onTime, 1, 'only the last drop beat its promise');
});

// Getting to the shop was 75 minutes; everything else was minutes. Naming the
// bottleneck is the one thing this panel is for.
test('the bottleneck is the step that actually costs the time', () => {
  assert.equal(compare(BATCH).bottleneck, 'toShop');
});

test("the first drop's artefact leg is kept out of the on-road figure", () => {
  const result = compare(BATCH);
  const onRoad = result.steps.find((step) => step.key === 'onRoad')!;
  assert.equal(result.firstLegs, 1);
  assert.equal(onRoad.measured, 3, "the 34-second leg was averaged in");
  assert.ok(
    onRoad.medianMs! > 5 * 60_000,
    `a real ride, not ${Math.round(onRoad.medianMs! / 1000)}s`,
  );
});

test('shares add up to the whole, so the bars fill the bar', () => {
  const total = compare(BATCH).steps.reduce((sum, step) => sum + step.share, 0);
  assert.ok(Math.abs(total - 1) < 0.0001);
});

test('a step nobody stamped is measured zero times rather than counted as instant', () => {
  const result = compare([
    { deliveryid: 1, assigntime: '2026-08-29 11:00:00', arrivaltime: '2026-08-29 11:30:00' } as DeliveryRow,
  ]);
  const counter = result.steps.find((step) => step.key === 'counter')!;
  assert.equal(counter.measured, 0);
  assert.equal(counter.medianMs, null);
  assert.equal(counter.share, 0);
});

test('distance compares plan against measurement, over the rows that have both', () => {
  const { distance } = compare(BATCH);
  assert.equal(distance.measured, 3, 'the 0.0026 km row has no measurement');
  assert.equal(distance.medianPlannedKm, 6);
  assert.equal(distance.medianRiddenKm, 5.5);
});

test('an empty day summarises to blanks, not zeroes', () => {
  const result = compare([]);
  assert.equal(result.journeys, 0);
  assert.equal(result.medianLateMs, null);
  assert.equal(result.bottleneck, null);
  assert.equal(result.distance.medianRiddenKm, null);
  assert.equal(result.steps.every((step) => step.medianMs === null), true);
});

/* ── Wording ─────────────────────────────────────────────────────────────── */

test('spans read at the scale they are', () => {
  assert.equal(span(null), '—');
  assert.equal(span(34_000), '34s');
  assert.equal(span(42 * 60_000), '42m');
  assert.equal(span(69 * 60_000), '1h 09m');
});

test('lateness reads as a sentence, not a signed number', () => {
  assert.equal(lateness(null), '—');
  assert.equal(lateness(30_000), 'on time');
  assert.equal(lateness(48 * 60_000), '48m late');
  assert.equal(lateness(-12 * 60_000), '12m early');
});