import { readFileSync } from "node:fs";
import { fileURLToPath } from "node:url";
import path from "node:path";

/**
 * Vite `define` entries every host needs to run numbl in the browser:
 * numbl reads `process` in a few guarded places, and the lab reports numbl's
 * package version (its `exports` map does not expose package.json to imports).
 */
export function numblDefine(): Record<string, string> {
  const entry = fileURLToPath(import.meta.resolve("numbl"));
  const pkgPath = path.join(path.dirname(entry), "..", "package.json");
  const version = (JSON.parse(readFileSync(pkgPath, "utf8")) as { version: string }).version;
  return {
    "process.platform": JSON.stringify("browser"),
    "process.env": "{}",
    __NUMBL_VERSION__: JSON.stringify(version),
  };
}