'use strict';

const test = require('node:test');
const assert = require('node:assert/strict');
const {
  calculateEnrollmentPricing,
  calculateClassRequestPricing,
  calculateMidpointDueDate
} = require('./registrationPricing');

test('full payment applies 500k discount', () => {
  const result = calculateEnrollmentPricing(
    { tuitionFee: 5_000_000, hasDiscount: false },
    { sectionCount: 16 },
    'full'
  );
  assert.equal(result.totalAmount, 4_500_000);
  assert.equal(result.paymentDiscount, 500_000);
  assert.equal(result.amountDueNow, 4_500_000);
});

test('installments charge full tuition with half due now', () => {
  const result = calculateEnrollmentPricing(
    { tuitionFee: 4_000_000, hasDiscount: false, startDate: '2026-09-01', days: [2, 4] },
    { sectionCount: 16 },
    'installments'
  );
  assert.equal(result.totalAmount, 4_000_000);
  assert.equal(result.amountDueNow, 2_000_000);
  assert.equal(result.secondInstallmentAmount, 2_000_000);
  assert.ok(result.secondInstallmentDueDate);
});

test('class request deposit is 10 percent', () => {
  const result = calculateClassRequestPricing({ tuitionFee: 3_000_000, hasDiscount: false });
  assert.equal(result.amountDueNow, 300_000);
  assert.equal(result.paymentPlan, 'deposit');
});

test('midpoint due date is halfway through course duration', () => {
  const due = calculateMidpointDueDate(
    { startDate: '2026-01-01', days: [2, 4] },
    { sectionCount: 16 }
  );
  assert.equal(due.toISOString().slice(0, 10), '2026-01-29');
});