// Regenerates public/fonts/manifest.json from the TTFs under public/fonts/<folder>/.
// Run: node scripts/fonts/build-manifest.mjs
import { existsSync, writeFileSync } from "node:fs";
import path from "node:path";
import { FONTS_DIR, MANIFEST_PATH, familyFolders, inspectFont, ttfFiles } from "./lib.mjs";

const families = [];
for (const folder of familyFolders()) {
  const files = ttfFiles(folder);
  if (files.length === 0) continue;
  const inspected = files.map((file) => inspectFont(folder, file));
  const names = new Set(inspected.map((f) => f.familyName));
  if (names.size !== 1) {
    throw new Error(`${folder}: mixed family names ${[...names].join(", ")}`);
  }
  const licenseFile = "OFL.txt";
  if (!existsSync(path.join(FONTS_DIR, folder, licenseFile))) {
    throw new Error(`${folder}: missing ${licenseFile}`);
  }
  const fonts = inspected
    .map((f) => f.info)
    .sort((a, b) => a.weight - b.weight || a.style.localeCompare(b.style) || a.file.localeCompare(b.file));
  families.push({ family: [...names][0], folder, license: "OFL-1.1", licenseFile, fonts });
}

writeFileSync(MANIFEST_PATH, `${JSON.stringify({ version: 1, families }, null, 2)}\n`);
console.log(
  `manifest.json: ${families.length} families, ${families.reduce((n, f) => n + f.fonts.length, 0)} fonts`,
);