import assert from 'node:assert';
import fs from 'node:fs';
import { test } from 'node:test';

// Render-only tests: no SMTP, no store. email.js imports only nodemailer.
const { renderLicenseEmail } = await import('../src/email.js');

const base = {
  code: 'DC-20F00-0000D-NB3FN-S6HXJ-A7CA0',
  durationDays: 30,
  planCode: 'premium_30d',
  expiresAt: '2026-10-21T23:33:00.000Z'
};

test('first purchase renders WELCOME email with walkthrough', () => {
  const mail = renderLicenseEmail({ ...base, extended: false });

  assert.equal(mail.subject, 'Your DashCaddy Premium license key',
    'first purchase subject must NOT say "extended"');
  assert.ok(!/extended/i.test(mail.subject), 'subject must contain no extended wording');
  assert.ok(mail.html.includes('Welcome to DashCaddy Premium'), 'welcome headline');
  assert.ok(mail.html.includes('What your subscription unlocks'), 'unlocks panel');
  assert.ok(mail.html.includes('Auto-Login SSO'), 'feature: SSO');
  assert.ok(mail.html.includes('Recipes'), 'feature: Recipes');
  assert.ok(mail.html.includes('Swarm orchestration'), 'feature: Swarm');
  assert.ok(mail.html.includes('Automatic renewals'), 'feature: auto-renewal value prop');
  assert.ok(mail.html.includes('Getting started takes about a minute'), 'getting-started steps');
  assert.ok(mail.html.includes('Admin'), 'activation path shown');
  assert.ok(mail.text.includes('YOUR SUBSCRIPTION INCLUDES:'), 'plain text unlocks block');
  assert.ok(mail.text.includes('GETTING STARTED:'), 'plain text steps block');
  assert.equal((mail.text.match(/To activate:/g) || []).length, 0,
    'welcome email replaces the bare activation line with the 3-step block');
  assert.ok(mail.text.includes('Paste your license key and click Activate'),
    'activation still covered, inside the getting-started steps');
  assert.equal((mail.html.match(/data:image/g) || []).length, 2,
    'two embedded logos (DashCaddy header + samiahmed7777 footer)');
});

test('renewal email keeps the extended copy and has NO welcome content', () => {
  const mail = renderLicenseEmail({ ...base, extended: true });

  assert.equal(mail.subject, 'Your DashCaddy Premium license has been extended (30 days added)');
  assert.ok(mail.html.includes('License extended'), 'extended headline');
  assert.ok(!mail.html.includes('Welcome to DashCaddy Premium'), 'no welcome headline');
  assert.ok(!mail.html.includes('What your subscription unlocks'), 'no unlocks panel');
  assert.ok(!mail.html.includes('Getting started takes about a minute'), 'no getting-started steps');
  assert.ok(!mail.text.includes('YOUR SUBSCRIPTION INCLUDES:'), 'plain text: no unlocks block');
  assert.ok(!mail.text.includes('GETTING STARTED:'), 'plain text: no steps block');
  assert.equal((mail.text.match(/To activate:/g) || []).length, 1,
    'renewal keeps its single activation line');
});

test('render matches production send path (sendLicenseEmail wraps renderLicenseEmail)', async () => {
  const src = fs.readFileSync(new URL('../src/email.js', import.meta.url), 'utf8');
  assert.ok(src.includes('renderLicenseEmail({ code, durationDays, planCode, expiresAt, extended })'),
    'sendLicenseEmail must delegate to renderLicenseEmail — one shared code path');
  assert.ok(src.includes('export async function sendLicenseEmail'),
    'send path still exported');
});