const assert = require('node:assert');
const { parseCobiets, formatCobieTimestamp, toCobiets, fromCobiets, getTAIOffsetAt } = require('..');

const test = require('node:test');

test('parseCobiets basic values', () => {
  assert.strictEqual(parseCobiets('0.0000'), 0);
  assert.strictEqual(parseCobiets('1.0000'), 0x10000);
  assert.strictEqual(parseCobiets('-1.0000'), -0x10000);
  assert.strictEqual(parseCobiets('0.0001'), 1);
});

test('formatCobieTimestamp round trip', () => {
  const str = '+1.0001';
  const parsed = parseCobiets(str);
  assert.strictEqual(formatCobieTimestamp(parsed), str);
});

test('getTAIOffsetAt known dates', () => {
  assert.strictEqual(getTAIOffsetAt(new Date('1972-01-01T00:00:00Z')), 10);
  assert.strictEqual(getTAIOffsetAt(new Date('1973-01-01T00:00:00Z')), 12);
  assert.strictEqual(getTAIOffsetAt(new Date('2017-01-01T00:00:00Z')), 37);
});

test('toCobiets/fromCobiets round trip', () => {
  const dates = [
    new Date('1970-01-01T00:00:00Z'),
    new Date('2017-01-01T00:00:00Z')
  ];
  for (const d of dates) {
    const cob = toCobiets(d);
    const back = fromCobiets(cob);
    assert.strictEqual(back.toISOString(), d.toISOString());
  }
});