const test = require('node:test');
const assert = require('node:assert/strict');
const fs = require('node:fs');

test('background imports generated email helper module', () => {
  const source = fs.readFileSync('background.js', 'utf8');
  assert.match(source, /importScripts\([\s\S]*'background\/generated-email-helpers\.js'/);
});

test('generated email helper module exposes a factory', () => {
  const source = fs.readFileSync('background/generated-email-helpers.js', 'utf8');
  const globalScope = {};

  const api = new Function('self', `${source}; return self.MultiPageGeneratedEmailHelpers;`)(globalScope);

  assert.equal(typeof api?.createGeneratedEmailHelpers, 'function');
});

test('generated email helper supports a4sky mailbox format', async () => {
  const source = fs.readFileSync('background/generated-email-helpers.js', 'utf8');
  const globalScope = {};
  const api = new Function('self', `${source}; return self.MultiPageGeneratedEmailHelpers;`)(globalScope);

  let savedEmail = null;
  const helpers = api.createGeneratedEmailHelpers({
    addLog: async () => {},
    getState: async () => ({ mailProvider: 'a4sky' }),
    normalizeEmailGenerator: () => 'duck',
    setEmailState: async (email) => {
      savedEmail = email;
    },
    throwIfStopped: () => {},
  });

  const email = await helpers.fetchGeneratedEmail({ mailProvider: 'a4sky' });

  assert.match(email, /^n\d{14}@a4sky\.com$/i);
  assert.equal(savedEmail, email);
});