// The Node entry (the "node" export condition): loads the engines from disk, and checks
// UTF-8 with node:buffer's native scans.
import { readFileSync } from "node:fs";
import { readFile } from "node:fs/promises";
import { isAscii, isUtf8 } from "node:buffer";
import { bind, defaultUrl } from "./core.js";

// TYPESTRIP_ERASE_WASM and TYPESTRIP_DOWNLEVEL_WASM each override their own slot only,
// so pointing one at another build leaves the other mode loading its own binary.
const env = [process.env.TYPESTRIP_ERASE_WASM, process.env.TYPESTRIP_DOWNLEVEL_WASM];

export const { transform, transformSync, engine } = bind({
  url: (slot) => env[slot] ?? defaultUrl(slot),
  compileSync: (url) => new WebAssembly.Module(readFileSync(url)),
  compile: (url) => readFile(url).then((bytes) => WebAssembly.compile(bytes)),
  isUtf8,
  isAscii,
});

export { UnsupportedSyntaxError } from "./core.js";