/**
 * Unit tests for the pure admission-queue formatting helpers (js/queue.js).
 * Covers the exact wording required by docs/QUEUE_SPECIFICATION.md §7.2 and §7.3.
 */

import { test, describe } from 'node:test';
import assert from 'node:assert/strict';
import { ordinal, formatEta, formatQueuedStatus, formatExitQueueLabel } from '../js/queue.js';

describe('ordinal', () => {
  test('handles 1st, 2nd, 3rd, 4th', () => {
    assert.equal(ordinal(1), '1st');
    assert.equal(ordinal(2), '2nd');
    assert.equal(ordinal(3), '3rd');
    assert.equal(ordinal(4), '4th');
  });

  test('handles the 11th-13th exception to the last-digit rule', () => {
    assert.equal(ordinal(11), '11th');
    assert.equal(ordinal(12), '12th');
    assert.equal(ordinal(13), '13th');
  });

  test('handles 21st, 22nd, 23rd and higher tens', () => {
    assert.equal(ordinal(21), '21st');
    assert.equal(ordinal(22), '22nd');
    assert.equal(ordinal(23), '23rd');
    assert.equal(ordinal(101), '101st');
    assert.equal(ordinal(111), '111th');
  });
});

describe('formatEta', () => {
  test('null or undefined reads as "estimating…"', () => {
    assert.equal(formatEta(null), 'estimating…');
    assert.equal(formatEta(undefined), 'estimating…');
  });

  test('below 60s reads as "under a minute"', () => {
    assert.equal(formatEta(0), 'under a minute');
    assert.equal(formatEta(59), 'under a minute');
  });

  test('60s and above rounds up to "about N min"', () => {
    assert.equal(formatEta(60), 'about 1 min');
    assert.equal(formatEta(61), 'about 2 min');
    assert.equal(formatEta(150), 'about 3 min');
    assert.equal(formatEta(120), 'about 2 min');
  });
});

describe('formatQueuedStatus', () => {
  test('position 1 reads as "You\'re next"', () => {
    assert.equal(formatQueuedStatus({ position: 1, eta_seconds: 40 }), "You're next · under a minute");
  });

  test('position > 1 uses the ordinal', () => {
    assert.equal(formatQueuedStatus({ position: 3, eta_seconds: 220 }), "You're 3rd in line · about 4 min");
  });

  test('null estimate reads as "estimating…"', () => {
    assert.equal(formatQueuedStatus({ position: 3, eta_seconds: null }), "You're 3rd in line · estimating…");
  });
});

describe('formatExitQueueLabel', () => {
  test('under 1 minute waited', () => {
    assert.equal(formatExitQueueLabel(0), 'I will try next time');
    assert.equal(formatExitQueueLabel(59_000), 'I will try next time');
  });

  test('1-3 minutes waited (inclusive)', () => {
    assert.equal(formatExitQueueLabel(60_000), "Ohhh, it's so long");
    assert.equal(formatExitQueueLabel(90_000), "Ohhh, it's so long");
    assert.equal(formatExitQueueLabel(180_000), "Ohhh, it's so long");
  });

  test('over 3 minutes waited', () => {
    assert.equal(formatExitQueueLabel(180_001), "I'm dying in this queue");
    assert.equal(formatExitQueueLabel(600_000), "I'm dying in this queue");
  });
});