Custom fonts

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import { createHash } from 'node:crypto';
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import { readFile } from 'node:fs/promises';
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async function uploadFontToSite({ siteId, accessToken, filePath, metadata }) {
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  const buf = await readFile(filePath);
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  const fileHash = createHash('md5').update(buf).digest('hex');
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  // Step 1 — register with Webflow
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  const registerRes = await fetch(
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    `https://api.webflow.com/v2/sites/${siteId}/custom_fonts`,
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    {
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      method: 'POST',
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      headers: {
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        Authorization: `Bearer ${accessToken}`,
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        'Content-Type': 'application/json',
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      },
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      body: JSON.stringify({
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        fileName: metadata.fileName,
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        fileHash,
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        fontFamily: metadata.fontFamily,
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        weight: metadata.weight,
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        italic: metadata.italic,
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        fontDisplay: metadata.fontDisplay ?? 'swap',
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        axes: metadata.axes ?? [],
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      }),
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    },
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  );
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  if (!registerRes.ok) {
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    const err = await registerRes.json();
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    throw new Error(`[${err.name}] ${err.msg}`);
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  }
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  const { customFont, upload } = await registerRes.json();
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  // Step 2 — POST the binary directly to S3
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  const form = new FormData();
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  for (const [k, v] of Object.entries(upload.fields)) form.append(k, v);
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  form.append('file', new Blob([buf]), metadata.fileName); // 'file' must be last
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  const s3Res = await fetch(upload.url, { method: 'POST', body: form });
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  if (s3Res.status !== 201) throw new Error(`S3 upload failed: ${s3Res.status}`);
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  return customFont;
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}

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async function syncBrandFonts({ targetSiteId, accessToken, brandKit }) {
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  const headers = {
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    Authorization: `Bearer ${accessToken}`,
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    'Content-Type': 'application/json',
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  };
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  // List the target site's existing fonts
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  const listRes = await fetch(
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    `https://api.webflow.com/v2/sites/${targetSiteId}/custom_fonts`,
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    { headers },
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  );
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  const { customFonts: existing } = await listRes.json();
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  // Identify fonts on the target that are not in the brand kit
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  const brandFamilies = new Set(brandKit.map((f) => f.fontFamily));
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  const toRemove = existing
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    .filter((f) => !brandFamilies.has(f.fontFamily))
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    .map((f) => ({ id: f.id }));
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  // Bulk-delete the non-brand fonts
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  if (toRemove.length > 0) {
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    const delRes = await fetch(
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      `https://api.webflow.com/v2/sites/${targetSiteId}/custom_fonts/batchDelete`,
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      { method: 'POST', headers, body: JSON.stringify({ items: toRemove }) },
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    );
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    const { deleted, failed } = await delRes.json();
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    console.log(`Removed ${deleted.length}; ${failed.length} could not be removed.`);
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  }
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  // Upload missing brand fonts
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  const existingFamilies = new Set(existing.map((f) => f.fontFamily));
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  for (const font of brandKit) {
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    if (existingFamilies.has(font.fontFamily)) continue;
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    await uploadFontToSite({
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      siteId: targetSiteId,
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      accessToken,
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      filePath: font.localPath,
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      metadata: font,
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    });
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  }
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}

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async function agentSetupTypography({ siteId, accessToken, brandFontPath, brandFontMeta }) {
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  // 1. Upload the brand font
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  const customFont = await uploadFontToSite({
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    siteId,
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    accessToken,
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    filePath: brandFontPath,
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    metadata: brandFontMeta,
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  });
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  // 2. Verify that the font is reachable through the API before downstream steps
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  const verifyRes = await fetch(
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    `https://api.webflow.com/v2/sites/${siteId}/custom_fonts/${customFont.id}`,
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    { headers: { Authorization: `Bearer ${accessToken}` } },
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  );
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  if (!verifyRes.ok) {
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    throw new Error('Font upload completed but resource is not yet readable.');
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  }
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  return customFont;
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}