import assert from 'node:assert/strict';
import { existsSync, readFileSync } from 'node:fs';
import { Buffer } from 'node:buffer';
import ts from 'typescript';

const moduleUrl = new URL('../client/src/utils/captchaImage.ts', import.meta.url);

assert.ok(
  existsSync(moduleUrl),
  'client/src/utils/captchaImage.ts should export captcha image source helpers',
);

const source = readFileSync(moduleUrl, 'utf8');
const { outputText } = ts.transpileModule(source, {
  compilerOptions: {
    module: ts.ModuleKind.ES2022,
    target: ts.ScriptTarget.ES2022,
  },
});

const dataUrl = `data:text/javascript;base64,${Buffer.from(outputText, 'utf8').toString('base64')}`;
const { normalizeCaptchaImageSrc, isDisplayableCaptchaImageSrc } = await import(dataUrl);

assert.equal(
  normalizeCaptchaImageSrc('/9j/4AAQSkZJRgABAQAAAQABAAD'),
  'data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD',
);
assert.equal(
  normalizeCaptchaImageSrc('iVBORw0KGgoAAAANSUhEUgAAAAUA'),
  'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUA',
);
assert.equal(
  normalizeCaptchaImageSrc('data:image/webp;base64,UklGRiIAAABXRUJQVlA4'),
  'data:image/webp;base64,UklGRiIAAABXRUJQVlA4',
);
assert.equal(
  normalizeCaptchaImageSrc('https://example.com/captcha.png'),
  'https://example.com/captcha.png',
);
assert.equal(normalizeCaptchaImageSrc('captcha required'), '');
assert.equal(normalizeCaptchaImageSrc(''), '');

assert.equal(isDisplayableCaptchaImageSrc('/9j/4AAQSkZJRgABAQAAAQABAAD'), true);
assert.equal(isDisplayableCaptchaImageSrc('data:image/png;base64,iVBORw0KGgo='), true);
assert.equal(isDisplayableCaptchaImageSrc('http://127.0.0.1/captcha.jpg'), true);
assert.equal(isDisplayableCaptchaImageSrc('captcha required'), false);

console.log('captcha image source checks passed');