import { copyFile, mkdir, rm } from "node:fs/promises";
import path from "node:path";
import { fileURLToPath } from "node:url";

const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
const output = path.join(root, "public", "ocr");
await rm(output, { recursive: true, force: true });
await mkdir(path.join(output, "core"), { recursive: true });
await mkdir(path.join(output, "lang"), { recursive: true });

await copyFile(
  path.join(root, "node_modules", "tesseract.js", "dist", "worker.min.js"),
  path.join(output, "worker.min.js"),
);
for (const name of [
  "tesseract-core-lstm.wasm.js",
  "tesseract-core-simd-lstm.wasm.js",
  "tesseract-core-relaxedsimd-lstm.wasm.js",
])
  await copyFile(
    path.join(root, "node_modules", "tesseract.js-core", name),
    path.join(output, "core", name),
  );
await copyFile(
  path.join(
    root,
    "node_modules",
    "@tesseract.js-data",
    "eng",
    "4.0.0_best_int",
    "eng.traineddata.gz",
  ),
  path.join(output, "lang", "eng.traineddata.gz"),
);
console.log("Prepared same-origin OCR runtime and English model");