import { readFile } from 'node:fs/promises';
import { resolve } from 'node:path';
import { pathToFileURL } from 'node:url';
import { describe, expect, it } from 'vitest';
import { loadProductionInputs } from '@/content/load-production-inputs';
import { readProductionInputsSnapshot } from '@/entry-client';
import { render } from '@/entry-server';
import {
  assemblePrerenderedHtml,
  parseExactConfigArgument,
  type ViteManifest,
} from '../../scripts/prerender.mjs';

const repositoryRoot = process.cwd();
const locations = {
  contentJson: pathToFileURL(resolve(repositoryRoot, 'content/public/portfolio-content.json')),
  assetManifestJson: pathToFileURL(resolve(repositoryRoot, 'content/public/asset-manifest.json')),
  preparedAssetRoot: pathToFileURL(`${resolve(repositoryRoot, 'inputs/prepared-assets')}/`),
  siteConfigJson: pathToFileURL(resolve(repositoryRoot, 'config/site.preview.json')),
};
const builtTemplate = `<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Portfolio</title>
    <!--portfolio-head-->
    <script type="module" crossorigin src="/assets/index-test.js"></script>
    <link rel="stylesheet" crossorigin href="/assets/index-test.css">
  </head>
  <body>
    <div id="app"></div>
    <!--portfolio-body-->
  </body>
</html>`;
const manifest: ViteManifest = {
  'index.html': {
    file: 'assets/index-test.js',
    src: 'index.html',
    isEntry: true,
    css: ['assets/index-test.css'],
  },
};

const renderRawArtifact = async () => {
  const inputs = await loadProductionInputs(locations);
  const markup = await render('/', inputs);
  const html = assemblePrerenderedHtml(builtTemplate, manifest, markup, inputs);
  return { html, inputs };
};

describe('raw prerendered document', () => {
  it('places complete semantic content and the inert snapshot before the executable module', async () => {
    const { html, inputs } = await renderRawArtifact();
    const document = new DOMParser().parseFromString(html, 'text/html');
    const moduleScript = document.querySelector('script[type="module"]');
    const snapshot = document.querySelector('#portfolio-inputs[type="application/json"]');

    expect(document.documentElement.lang).toBe('en');
    expect(document.title).toBe('Luca Pîslaru — System Administrator & Full-Stack Developer');
    expect(document.querySelectorAll('h1')).toHaveLength(1);
    expect(document.querySelector('h1')?.textContent).toBe('Luca Pîslaru');
    expect(document.querySelector('h1 + p')?.textContent).toBe('System Administrator & Full-Stack Developer');
    expect([...document.querySelectorAll('main > section')].map((section) => section.id)).toEqual([
      'start', 'profile', 'experience', 'infrastructure', 'selected-builds', 'additional-work', 'toolkit', 'contact',
    ]);
    expect(document.body.textContent).toContain('Secure self-hosted platform and lifecycle');
    expect(document.body.textContent).toContain('Private self-hosted medication tracker');
    expect(document.body.textContent).toContain('Linux');
    expect(document.querySelector('a[href="mailto:luca.pislaru@gmail.com"]')?.textContent)
      .toBe('Start a conversation');
    expect(document.querySelector('nav a[href="#infrastructure"]')).not.toBeNull();
    expect(snapshot).not.toBeNull();
    expect(moduleScript).not.toBeNull();
    expect(html.indexOf('id="portfolio-inputs"')).toBeLessThan(html.indexOf('<script type="module"'));
    expect(html.indexOf('Luca Pîslaru')).toBeLessThan(html.indexOf('<script type="module"'));
    expect(html).not.toContain('window.__PORTFOLIO_INPUTS__');
    expect(html).not.toContain('<!--portfolio-');
    expect(JSON.parse(snapshot!.textContent ?? '')).toEqual(inputs);
    expect(readProductionInputsSnapshot(document)).toEqual(inputs);
  });

  it('emits one canonical, one safe ProfilePage, and no fabricated preview image', async () => {
    const { html } = await renderRawArtifact();
    const document = new DOMParser().parseFromString(html, 'text/html');
    const jsonLdNodes = document.querySelectorAll('script[type="application/ld+json"]');

    expect(document.querySelectorAll('link[rel="canonical"]')).toHaveLength(1);
    expect(document.querySelector('link[rel="canonical"]')?.getAttribute('href')).toBe('https://portfolio.localhost/');
    expect(document.querySelectorAll('meta[property="og:image"]')).toHaveLength(0);
    expect(jsonLdNodes).toHaveLength(1);
    const jsonLd = JSON.parse(jsonLdNodes[0]!.textContent ?? '');
    expect(jsonLd['@type']).toBe('ProfilePage');
    expect(jsonLd.mainEntity.name).toBe('Luca Pîslaru');
    expect(jsonLd.mainEntity.jobTitle).toBe('System Administrator & Full-Stack Developer');
    expect((jsonLdNodes[0]!.textContent ?? '').toLowerCase()).not.toContain('</script');
  });

  it('adds deterministic entry preloads without duplicating the executable module', async () => {
    const { html } = await renderRawArtifact();

    expect(html.match(/rel="modulepreload"/gu)).toHaveLength(1);
    expect(html.match(/<script type="module"/gu)).toHaveLength(1);
    expect(html).toContain('<link rel="modulepreload" href="/assets/index-test.js" />');
  });
});

describe('strict prerender command line', () => {
  it('accepts exactly one explicit safe repository-relative config path', () => {
    expect(parseExactConfigArgument(['--config', 'config/site.preview.json']))
      .toBe('config/site.preview.json');
  });

  it.each([
    { arguments_: [] },
    { arguments_: ['--config'] },
    { arguments_: ['--config', 'config/site.preview.json', '--config', 'config/site.preview.json'] },
    { arguments_: ['--config', 'config/site.preview.json', '--unknown'] },
    { arguments_: ['--config', '../site.preview.json'] },
    { arguments_: ['--config', '/tmp/site.preview.json'] },
    { arguments_: ['--config', 'config\\site.preview.json'] },
  ])('rejects missing, duplicate, unknown, or unsafe arguments: $arguments_', ({ arguments_ }) => {
    expect(() => parseExactConfigArgument(arguments_)).toThrow(/exactly --config|safe repository-relative/i);
  });
});

describe('approved build template', () => {
  it('declares English and contains no executable input assignment', async () => {
    const template = await readFile(resolve(repositoryRoot, 'index.html'), 'utf8');

    expect(template).toContain('<html lang="en">');
    expect(template).not.toContain('window.__PORTFOLIO_INPUTS__');
  });
});