import { createHash } from 'node:crypto';
import { mkdtemp, mkdir, readFile, rm, writeFile } from 'node:fs/promises';
import { tmpdir } from 'node:os';
import { join, resolve } from 'node:path';
import { pathToFileURL } from 'node:url';
import { afterEach, describe, expect, it } from 'vitest';
import { loadProductionInputs } from '@/content/load-production-inputs';
import { createPageMetadata, createStaticHostArtifacts } from '@/content/metadata';
import { render } from '@/entry-server';
import { assemblePrerenderedHtml, type ViteManifest } from '../../scripts/prerender.mjs';
import { verifyArtifactDirectory } from '../../scripts/verify-artifacts.mjs';
import type { ProductionInputs, SiteConfig } from '@/content/types';

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 manifest: ViteManifest = {
  'index.html': {
    file: 'assets/index-test.js',
    src: 'index.html',
    isEntry: true,
    css: ['assets/index-test.css'],
  },
};
const template = `<!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" href="/assets/index-test.css"></head><body><div id="app"></div>
<!--portfolio-body--></body></html>`;
const clientJavaScript = 'export {};\n';
const clientStylesheet = 'body { margin: 0; }\n';
const sha256 = (value: string): string => createHash('sha256').update(value).digest('hex');

const wrapAppContents = (html: string, opening: string, closing: string): string => {
  const appOpening = '<div id="app">';
  const appContentStart = html.indexOf(appOpening) + appOpening.length;
  const snapshotStart = html.indexOf('<script id="portfolio-inputs"');
  const appContentEnd = html.lastIndexOf('</div>', snapshotStart);
  return `${html.slice(0, appContentStart)}${opening}${html.slice(appContentStart, appContentEnd)}${closing}${html.slice(appContentEnd)}`;
};

const temporaryDirectories: string[] = [];
afterEach(async () => {
  await Promise.all(temporaryDirectories.splice(0).map((directory) => rm(directory, { recursive: true, force: true })));
});

const writeValidArtifacts = async (site?: SiteConfig) => {
  const loaded = await loadProductionInputs(locations);
  const inputs: Readonly<ProductionInputs> = site === undefined ? loaded : { ...loaded, site };
  const directory = await mkdtemp(join(tmpdir(), 'portfolio-artifacts-'));
  temporaryDirectories.push(directory);
  await mkdir(join(directory, 'assets'));
  const html = assemblePrerenderedHtml(template, manifest, await render('/', inputs), inputs);
  const hostArtifacts = createStaticHostArtifacts(createPageMetadata(inputs.content, inputs.manifest, inputs.site), inputs.site);
  const publicAssets = inputs.manifest.assets
    .map((asset) => ({
      path: `assets/${asset.fileName}`,
      bytesPath: resolve(repositoryRoot, 'inputs/prepared-assets', asset.fileName),
    }))
    .sort((left, right) => left.path.localeCompare(right.path));
  const publicAssetBytes = await Promise.all(publicAssets.map(async (asset) => ({
    ...asset,
    bytes: await readFile(asset.bytesPath),
  })));
  const contract = {
    schema: 'portfolio-artifact-contract/v1',
    buildId: inputs.site.buildId,
    entryModule: 'assets/index-test.js',
    executableModules: ['assets/index-test.js'],
    modulePreloads: ['assets/index-test.js'],
    styles: ['assets/index-test.css'],
    viteAssets: [],
    publicAssets: publicAssets.map((asset) => asset.path),
    files: [
      { path: 'assets/index-test.css', sha256: sha256(clientStylesheet) },
      { path: 'assets/index-test.js', sha256: sha256(clientJavaScript) },
      ...publicAssetBytes.map((asset) => ({
        path: asset.path,
        sha256: createHash('sha256').update(asset.bytes).digest('hex'),
      })),
    ],
  } as const;
  await Promise.all([
    writeFile(join(directory, 'index.html'), html),
    writeFile(join(directory, 'robots.txt'), hostArtifacts.robots),
    writeFile(join(directory, '_headers.example'), hostArtifacts.headers),
    writeFile(join(directory, '_redirects.example'), hostArtifacts.redirects),
    writeFile(join(directory, 'assets/index-test.js'), clientJavaScript),
    writeFile(join(directory, 'assets/index-test.css'), clientStylesheet),
    ...publicAssetBytes.map((asset) => writeFile(join(directory, asset.path), asset.bytes)),
    ...(hostArtifacts.sitemap === undefined
      ? []
      : [writeFile(join(directory, 'sitemap.xml'), hostArtifacts.sitemap)]),
  ]);
  return { directory, html, inputs, contract };
};

describe('artifact verification', () => {
  it('accepts one exact canonical, Open Graph, Twitter, and privacy-safe JSON-LD metadata set', async () => {
    const { directory, html, inputs, contract } = await writeValidArtifacts();
    const document = new DOMParser().parseFromString(html, 'text/html');
    const previewAsset = inputs.manifest.assets.find(
      ({ id }) => id === inputs.content.metadata.socialPreviewAssetId,
    )!;
    const expectedImage = `https://portfolio.localhost/assets/${previewAsset.fileName}`;

    expect(document.querySelectorAll('link[rel="canonical"]')).toHaveLength(1);
    expect(document.querySelector('link[rel="canonical"]')?.getAttribute('href'))
      .toBe('https://portfolio.localhost/');
    for (const [attribute, value] of [
      ['meta[property="og:type"]', 'profile'],
      ['meta[property="og:title"]', 'Luca Pîslaru — System Administrator & Full-Stack Developer'],
      ['meta[property="og:description"]', inputs.content.metadata.description],
      ['meta[property="og:url"]', 'https://portfolio.localhost/'],
      ['meta[property="og:image"]', expectedImage],
      ['meta[name="twitter:card"]', 'summary_large_image'],
      ['meta[name="twitter:title"]', 'Luca Pîslaru — System Administrator & Full-Stack Developer'],
      ['meta[name="twitter:description"]', inputs.content.metadata.description],
      ['meta[name="twitter:image"]', expectedImage],
    ] as const) {
      const nodes = document.querySelectorAll(attribute);
      expect(nodes, attribute).toHaveLength(1);
      expect(nodes[0]?.getAttribute('content'), attribute).toBe(value);
    }
    const jsonLdNodes = document.querySelectorAll('script[type="application/ld+json"]');
    expect(jsonLdNodes).toHaveLength(1);
    const jsonLd = JSON.parse(jsonLdNodes[0]!.textContent ?? '');
    expect(jsonLd.mainEntity.homeLocation).toEqual({
      '@type': 'Place',
      address: {
        '@type': 'PostalAddress',
        addressLocality: 'Bucharest',
        addressCountry: 'RO',
      },
    });
    expect(JSON.stringify(jsonLd)).not.toMatch(
      /streetAddress|postalCode|telephone|interactionStatistic|"image"/iu,
    );

    await expect(verifyArtifactDirectory(directory, inputs, contract)).resolves.toBeUndefined();
  });

  it('accepts the pure production artifact path with canonical sitemap and allow policy', async () => {
    const productionSite: SiteConfig = {
      environment: 'production',
      canonicalUrl: 'https://portfolio.example.test/',
      buildId: 'production-test',
    };
    const { directory, inputs, contract } = await writeValidArtifacts(productionSite);

    await expect(verifyArtifactDirectory(directory, inputs, contract)).resolves.toBeUndefined();
  });

  it.each([
    {
      name: 'a missing hero contact link',
      mutate: (html: string) => html.replace('href="#contact">Contact Me</a>', 'href="#selected-builds">Contact Me</a>'),
    },
    {
      name: 'a duplicate mailto link beyond the hero and contact actions',
      mutate: (html: string) => html.replace('</main>', '<a href="mailto:luca.pislaru@gmail.com">Email Luca</a></main>'),
    },
    {
      name: 'a missing native email disclosure',
      mutate: (html: string) => html.replace('<summary>Email Me</summary>', '<span>Email Me</span>'),
    },
    {
      name: 'a hidden mailto link outside the app root',
      mutate: (html: string) => html.replace('</body>', '<a hidden href="mailto:luca.pislaru@gmail.com">Email Luca</a></body>'),
    },
    {
      name: 'a plain address hidden in initial page data',
      mutate: (html: string) => html.replace('</footer>', '<span hidden>luca.pislaru@gmail.com</span></footer>'),
    },
  ])('rejects $name', async ({ mutate }) => {
    const { directory, html, inputs, contract } = await writeValidArtifacts();
    await writeFile(join(directory, 'index.html'), mutate(html));

    await expect(verifyArtifactDirectory(directory, inputs, contract)).rejects.toThrow(/contact|email|mailto/i);
  });

  it.each([
    {
      name: 'an omitted adaptive soundtrack file',
      mutate: async (directory: string) => rm(join(directory, 'assets/nightdrive-afterglow.opus')),
      error: /missing.*artifact|digest|public asset/iu,
    },
    {
      name: 'an altered adaptive soundtrack file',
      mutate: async (directory: string) => writeFile(join(directory, 'assets/nightdrive-drive-lift.mp3'), 'altered'),
      error: /digest does not match|hash/u,
    },
    {
      name: 'an unreferenced adaptive soundtrack file',
      mutate: async (directory: string) => writeFile(join(directory, 'assets/nightdrive-unreferenced.opus'), 'unreferenced'),
      error: /unexpected artifact|unreferenced/u,
    },
  ])('rejects $name', async ({ mutate, error }) => {
    const { directory, inputs, contract } = await writeValidArtifacts();
    await mutate(directory);
    await expect(verifyArtifactDirectory(directory, inputs, contract)).rejects.toThrow(error);
  });

  it.each([
    {
      name: 'an unexpected preview sitemap',
      mutate: async (directory: string) => writeFile(join(directory, 'sitemap.xml'), '<urlset />'),
      error: /preview.*sitemap/i,
    },
    {
      name: 'a source map',
      mutate: async (directory: string) => writeFile(join(directory, 'assets/index-test.js.map'), '{}'),
      error: /source map|unexpected artifact/i,
    },
    {
      name: 'an unknown artifact',
      mutate: async (directory: string) => writeFile(join(directory, 'private-notes.txt'), 'notes'),
      error: /unexpected artifact/i,
    },
    {
      name: 'a prohibited private surface',
      mutate: async (directory: string) => writeFile(join(directory, 'assets/index-test.js'), 'const evidenceId = "fixture";'),
      error: /prohibited surface|digest does not match/i,
    },
  ])('rejects $name', async ({ mutate, error }) => {
    const { directory, inputs, contract } = await writeValidArtifacts();
    await mutate(directory);

    await expect(verifyArtifactDirectory(directory, inputs, contract)).rejects.toThrow(error);
  });

  it.each([
    {
      name: 'duplicate canonical metadata',
      mutate: (html: string) => html.replace('</head>', '<link rel="canonical" href="https://portfolio.localhost/" /></head>'),
      error: /exactly one canonical/i,
    },
    {
      name: 'duplicate Twitter card metadata',
      mutate: (html: string) => html.replace(
        '</head>',
        '<meta name="twitter:card" content="summary_large_image" /></head>',
      ),
      error: /exactly one twitter:card/i,
    },
    {
      name: 'an Open Graph canonical drift',
      mutate: (html: string) => html.replace(
        '<meta property="og:url" content="https://portfolio.localhost/" />',
        '<meta property="og:url" content="https://other.example.test/" />',
      ),
      error: /og:url.*canonical|metadata.*match/i,
    },
    {
      name: 'a mismatched Open Graph image',
      mutate: (html: string) => html.replace(
        /<meta property="og:image" content="[^"]+" \/>/u,
        '<meta property="og:image" content="https://portfolio.localhost/assets/not-approved.webp" />',
      ),
      error: /og:image.*manifest|metadata.*match/i,
    },
    {
      name: 'a mismatched Twitter image',
      mutate: (html: string) => html.replace(
        /<meta name="twitter:image" content="[^"]+" \/>/u,
        '<meta name="twitter:image" content="https://portfolio.localhost/assets/not-approved.webp" />',
      ),
      error: /twitter:image.*manifest|metadata.*match/i,
    },
    {
      name: 'private JSON-LD location detail',
      mutate: (html: string) => html.replace(
        '"addressCountry":"RO"',
        '"addressCountry":"RO","streetAddress":"Private street"',
      ),
      error: /json-ld.*(?:unsafe|location|public metadata|match)/i,
    },
    {
      name: 'duplicate H1 identity',
      mutate: (html: string) => html.replace('</main>', '<h1>Luca Pîslaru</h1></main>'),
      error: /exactly one (?:visible )?h1/i,
    },
    {
      name: 'malformed JSON-LD',
      mutate: (html: string) => html.replace(/<script type="application\/ld\+json">.*?<\/script>/u, '<script type="application/ld+json">{</script>'),
      error: /json-ld/i,
    },
    {
      name: 'missing infrastructure evidence',
      mutate: (html: string) => html.replace('id="infrastructure"', 'id="removed-infrastructure"'),
      error: /section.*infrastructure|visible sections/i,
    },
    {
      name: 'executable snapshot assignment',
      mutate: (html: string) => html.replace('<script id="portfolio-inputs" type="application/json">', '<script>window.__PORTFOLIO_INPUTS__='),
      error: /inert input snapshot|prohibited surface/i,
    },
  ])('rejects raw HTML with $name', async ({ mutate, error }) => {
    const { directory, html, inputs, contract } = await writeValidArtifacts();
    await writeFile(join(directory, 'index.html'), mutate(html));

    await expect(verifyArtifactDirectory(directory, inputs, contract)).rejects.toThrow(error);
  });

  it('rejects a missing crawl artifact', async () => {
    const { directory, inputs, contract } = await writeValidArtifacts();
    await rm(join(directory, 'robots.txt'));

    await expect(verifyArtifactDirectory(directory, inputs, contract)).rejects.toThrow(/robots/i);
  });

  it('checks the CSP hash against the actual serialized JSON-LD bytes', async () => {
    const { directory, inputs, contract } = await writeValidArtifacts();
    const headersPath = join(directory, '_headers.example');
    const headers = await readFile(headersPath, 'utf8');
    await writeFile(headersPath, headers.replace(/sha256-[A-Za-z0-9+/=]+/u, 'sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA='));

    await expect(verifyArtifactDirectory(directory, inputs, contract)).rejects.toThrow(/csp.*json-ld|json-ld.*csp|exact.*headers/i);
  });

  it.each([
    {
      name: 'a final-HTML-authorized substitute module',
      mutate: async (directory: string, html: string) => {
        await rm(join(directory, 'assets/index-test.js'));
        await writeFile(join(directory, 'assets/substitute.js'), clientJavaScript);
        return html.replaceAll('assets/index-test.js', 'assets/substitute.js');
      },
      error: /trusted.*module|artifact contract|unexpected artifact/i,
    },
    {
      name: 'an extra inline executable script',
      mutate: async (_directory: string, html: string) => html.replace('</body>', '<script>void 0</script></body>'),
      error: /unexpected executable script/i,
    },
    {
      name: 'an extra external executable script',
      mutate: async (_directory: string, html: string) => html.replace('</body>', '<script src="https://example.test/evil.js"></script></body>'),
      error: /unexpected executable script|external executable/i,
    },
    {
      name: 'a final-HTML-authorized extra stylesheet',
      mutate: async (directory: string, html: string) => {
        await writeFile(join(directory, 'assets/extra.css'), 'body {}');
        return html.replace('</head>', '<link rel="stylesheet" href="/assets/extra.css" /></head>');
      },
      error: /trusted.*style|artifact contract|unexpected artifact/i,
    },
    {
      name: 'a missing trusted module preload',
      mutate: async (_directory: string, html: string) => html.replace(/<link rel="modulepreload"[^>]+>\n?/u, ''),
      error: /trusted.*preload|module preload/i,
    },
  ])('rejects $name instead of trusting final HTML', async ({ mutate, error }) => {
    const { directory, html, inputs, contract } = await writeValidArtifacts();
    await writeFile(join(directory, 'index.html'), await mutate(directory, html));

    await expect(verifyArtifactDirectory(directory, inputs, contract)).rejects.toThrow(error);
  });

  it.each([
    {
      name: 'an appended CSP directive',
      mutate: (headers: string) => `${headers}  script-src https://example.test\n`,
    },
    {
      name: 'an external script-src relaxation',
      mutate: (headers: string) => headers.replace("script-src 'self'", "script-src 'self' https://example.test"),
    },
    {
      name: 'a duplicate partial CSP policy',
      mutate: (headers: string) => `${headers}  Content-Security-Policy: default-src 'self'\n`,
    },
    {
      name: 'commented header impostors',
      mutate: (headers: string) => headers.split('\n').map((line) => `# ${line}`).join('\n'),
    },
  ])('rejects $name by exact header bytes', async ({ mutate }) => {
    const { directory, inputs, contract } = await writeValidArtifacts();
    const path = join(directory, '_headers.example');
    await writeFile(path, mutate(await readFile(path, 'utf8')));

    await expect(verifyArtifactDirectory(directory, inputs, contract)).rejects.toThrow(/exact.*headers|headers.*exact/i);
  });

  it('rejects modified redirect example bytes', async () => {
    const { directory, inputs, contract } = await writeValidArtifacts();
    const path = join(directory, '_redirects.example');
    await writeFile(path, `${await readFile(path, 'utf8')}# appended\n`);

    await expect(verifyArtifactDirectory(directory, inputs, contract)).rejects.toThrow(/exact.*redirect|redirect.*exact/i);
  });

  it('rejects modified production sitemap bytes', async () => {
    const productionSite: SiteConfig = {
      environment: 'production',
      canonicalUrl: 'https://portfolio.example.test/',
      buildId: 'production-test',
    };
    const { directory, inputs, contract } = await writeValidArtifacts(productionSite);
    const path = join(directory, 'sitemap.xml');
    await writeFile(path, `${await readFile(path, 'utf8')}<!-- appended -->\n`);

    await expect(verifyArtifactDirectory(directory, inputs, contract)).rejects.toThrow(/exact.*sitemap|sitemap.*exact/i);
  });

  it.each([
    {
      name: 'a hidden application root',
      mutate: (html: string) => html.replace('<div id="app">', '<div id="app" hidden>'),
    },
    {
      name: 'identity rendered only inside a template',
      mutate: (html: string) => html.replace(
        /(<h1\b[^>]*>[\s\S]*?<\/h1><p class="hero-journey__role">System Administrator &amp; Full-Stack Developer<\/p>)/u,
        '<template>$1</template>',
      ),
    },
    {
      name: 'an aria-hidden native navigation',
      mutate: (html: string) => html.replace('<nav class="site-navigation"', '<nav aria-hidden="true" class="site-navigation"'),
    },
    {
      name: 'an inert canonical section',
      mutate: (html: string) => html.replace('<section id="infrastructure"', '<section id="infrastructure" inert'),
    },
    {
      name: 'infrastructure evidence present only in hydration JSON',
      mutate: (html: string) => {
        const snapshotAt = html.indexOf('<script id="portfolio-inputs"');
        return `${html.slice(0, snapshotAt).replaceAll('Secure self-hosted platform and lifecycle', 'Removed evidence')}${html.slice(snapshotAt)}`;
      },
    },
    {
      name: 'all semantic SSR inside a closed dialog',
      mutate: (html: string) => wrapAppContents(html, '<dialog>', '</dialog>'),
    },
    {
      name: 'required evidence outside the summary of closed details',
      mutate: (html: string, inputs: Readonly<ProductionInputs>) => {
        const evidence = inputs.content.infrastructure.bands[1]!.summary;
        return html.replace(evidence, `<details><summary>Infrastructure evidence</summary><span>${evidence}</span></details>`);
      },
    },
    {
      name: 'mixed-case true aria-hidden navigation',
      mutate: (html: string) => html.replace(
        '<nav class="site-navigation"',
        '<nav aria-hidden="TRUE" class="site-navigation"',
      ),
    },
  ])('rejects $name as non-visible semantic evidence', async ({ mutate }) => {
    const { directory, html, inputs, contract } = await writeValidArtifacts();
    const mutated = mutate(html, inputs);
    expect(mutated).not.toBe(html);
    await writeFile(join(directory, 'index.html'), mutated);

    await expect(verifyArtifactDirectory(directory, inputs, contract)).rejects.toThrow(/visible semantic|visible h1|visible navigation|visible section|connected/i);
  });

  it.each([
    {
      name: 'semantic SSR inside an open dialog',
      mutate: (html: string, _inputs: Readonly<ProductionInputs>) =>
        wrapAppContents(html, '<dialog open>', '</dialog>'),
    },
    {
      name: 'required evidence inside open details',
      mutate: (html: string, inputs: Readonly<ProductionInputs>) => {
        const evidence = inputs.content.infrastructure.bands[1]!.summary;
        return html.replace(evidence, `<details open><summary>Infrastructure evidence</summary><span>${evidence}</span></details>`);
      },
    },
    {
      name: 'required evidence inside the active summary of closed details',
      mutate: (html: string, inputs: Readonly<ProductionInputs>) => {
        const evidence = inputs.content.infrastructure.bands[1]!.summary;
        return html.replace(evidence, `<details><summary>${evidence}</summary><span>Collapsed evidence</span></details>`);
      },
    },
  ])('accepts $name as visible semantic evidence', async ({ mutate }) => {
    const { directory, html, inputs, contract } = await writeValidArtifacts();
    await writeFile(join(directory, 'index.html'), mutate(html, inputs));

    await expect(verifyArtifactDirectory(directory, inputs, contract)).resolves.toBeUndefined();
  });
});