import {
  applyMessageTemplate,
  buildSendAts,
  cancelTriggersFor,
  clipSms,
  delayMs,
} from '../message-automation.util';

function assert(cond: unknown, msg: string): asserts cond {
  if (!cond) throw new Error(msg);
}

function testDelay() {
  assert(delayMs(0, 'minutes') === 0, 'zero delay');
  assert(delayMs(2, 'hours') === 2 * 3_600_000, '2 hours');
  assert(delayMs(2, 'days') === 2 * 86_400_000, '2 days');
}

function testSendAts() {
  const now = new Date('2026-09-13T12:00:00.000Z');
  const once = buildSendAts(now, 0, 'minutes', 1, 2, 'days');
  assert(once.length === 1, 'one send');
  assert(once[0].getTime() === now.getTime(), 'immediate first');

  const three = buildSendAts(now, 1, 'hours', 3, 2, 'days');
  assert(three.length === 3, 'three sends');
  assert(three[0].getTime() === now.getTime() + 3_600_000, 'start + 1h');
  assert(
    three[1].getTime() === three[0].getTime() + 2 * 86_400_000,
    'second + 2 days',
  );
  assert(
    three[2].getTime() === three[0].getTime() + 4 * 86_400_000,
    'third + 4 days',
  );
}

function testCancelMap() {
  assert(
    cancelTriggersFor('invoice_paid').includes('invoice_issued'),
    'paid cancels issued',
  );
  assert(cancelTriggersFor('person_created').length === 0, 'no cancel on create');
}

function testTemplate() {
  assert(
    applyMessageTemplate('سلام {title}', 'فاکتور ۱۲') === 'سلام فاکتور ۱۲',
    'title var',
  );
  assert(clipSms('الف'.repeat(200)).length === 160, 'sms clip');
}

testDelay();
testSendAts();
testCancelMap();
testTemplate();
console.log('message-automation checks passed');