import { describe, it } from 'node:test';
import assert from 'node:assert/strict';
import { formatClassDays, formatClassTime, formatClassSchedule, calculateClassEndDate } from './classSchedule.js';

describe('class schedule display', () => {
  it('formats weekdays in Iran week order', () => {
    assert.equal(formatClassDays([1, 6]), 'شنبه و دوشنبه');
  });

  it('formats start and end times', () => {
    assert.equal(formatClassTime('19:00', '21:00'), '19:00 – 21:00');
    assert.equal(formatClassTime('19:00', ''), '19:00');
  });

  it('joins days and time for a class schedule label', () => {
    assert.equal(
      formatClassSchedule({ days: [6, 1], startTime: '19:00', endTime: '21:00' }),
      'شنبه و دوشنبه | 19:00 – 21:00'
    );
    assert.equal(formatClassSchedule({}), '');
  });

  it('calculates class end date from start date, days and number of sessions', () => {
    // 1403/01/01 is Wednesday (day 3)
    // If days are [6, 2] (Saturday, Tuesday), 2 sessions:
    // Session 1: Saturday 1403/01/04
    // Session 2: Tuesday 1403/01/07
    const endDate = calculateClassEndDate('1403/01/01', [6, 2], 2);
    assert.equal(endDate, '1403/01/07');
  });
});