import assert from 'node:assert/strict';
import { test } from 'node:test';
import { deriveThicknessTermId, type ThicknessBand } from './thicknessBand';

// Synced-Woo-shaped bands (id + name). The e2e fixture uses a single "2-4 in" band.
const BANDS: ThicknessBand[] = [
  { id: 39, name: '2-4 in' },
];

test('TV-9 / QUALITY-95: 1 in rounds up into the enclosing synced band', () => {
  const bands: ThicknessBand[] = [
    { id: 10, name: '1-2 in' },
    { id: 39, name: '2-4 in' },
  ];
  assert.equal(deriveThicknessTermId(1, bands), 10);
  assert.equal(deriveThicknessTermId(1.5, bands), 10);
  // 2.0 is exactly the upper bound of the 1-2 band → belongs to it.
  assert.equal(deriveThicknessTermId(2.0, bands), 10);
  // 2.01 falls into 2-4.
  assert.equal(deriveThicknessTermId(2.25, bands), 39);
  assert.equal(deriveThicknessTermId(4, bands), 39);
});

test('e2e fixture: thickness_in 2 → the single "2-4 in" band (id 39)', () => {
  assert.equal(deriveThicknessTermId(2, BANDS), 39);
});

test('above every band → empty (no invented band; upstream thickness fix resolves it)', () => {
  assert.equal(deriveThicknessTermId(5, BANDS), '');
});

test('no thickness / non-finite → empty', () => {
  assert.equal(deriveThicknessTermId(null, BANDS), '');
  assert.equal(deriveThicknessTermId(undefined, BANDS), '');
  assert.equal(deriveThicknessTermId(0, BANDS), '');
  assert.equal(deriveThicknessTermId(NaN, BANDS), '');
  assert.equal(deriveThicknessTermId(2, []), '');
});

test('band names are parsed from the synced names, never hardcoded (order-independent)', () => {
  // Reverse the array: the derivation must still pick the right band by bound.
  const bands: ThicknessBand[] = [
    { id: 39, name: '2-4 in' },
    { id: 10, name: '1-2 in' },
  ];
  assert.equal(deriveThicknessTermId(1.5, bands), 10);
  assert.equal(deriveThicknessTermId(3, bands), 39);
});

test('malformed band names are skipped without throwing', () => {
  const bands: ThicknessBand[] = [
    { id: 1, name: 'N/A' },
    { id: 2, name: '4-2 in' }, // inverted, unusable
    { id: 39, name: '2-4 in' },
  ];
  assert.equal(deriveThicknessTermId(3, bands), 39);
});