'use strict';

const { describe, it } = require('node:test');
const assert = require('node:assert/strict');
const { resolveDateRange, isWithinRange } = require('./financialRange');

describe('resolveDateRange', () => {
  it('builds a range from explicit start/end dates', () => {
    const { start, end } = resolveDateRange({ startDate: '2026-01-01', endDate: '2026-01-31' });
    assert.equal(start.getFullYear(), 2026);
    assert.equal(start.getMonth(), 0);
    assert.equal(start.getDate(), 1);
    assert.equal(end.getDate(), 31);
    assert.equal(end.getHours(), 23);
  });

  it('builds a range from month + year shorthand', () => {
    const { start, end } = resolveDateRange({ month: 2, year: 2026 });
    assert.equal(start.getMonth(), 1);
    assert.equal(start.getDate(), 1);
    assert.equal(end.getMonth(), 1);
    assert.equal(end.getDate(), 28); // 2026 is not a leap year
  });

  it('falls back to all-time when nothing is provided', () => {
    const { start, end } = resolveDateRange({});
    assert.ok(start.getFullYear() <= 1970);
    assert.ok(end.getTime() <= Date.now());
  });

  it('swaps start/end when given out of order', () => {
    const { start, end } = resolveDateRange({ startDate: '2026-03-01', endDate: '2026-01-01' });
    assert.ok(start.getTime() < end.getTime());
  });
});

describe('isWithinRange', () => {
  it('detects dates inside and outside the range', () => {
    const { start, end } = resolveDateRange({ startDate: '2026-01-01', endDate: '2026-01-31' });
    assert.equal(isWithinRange('2026-01-15', start, end), true);
    assert.equal(isWithinRange('2026-02-01', start, end), false);
  });

  it('returns false for missing or invalid values', () => {
    const { start, end } = resolveDateRange({ startDate: '2026-01-01', endDate: '2026-01-31' });
    assert.equal(isWithinRange(null, start, end), false);
    assert.equal(isWithinRange('not-a-date', start, end), false);
  });
});