/**
 * Node-only WASM byte loader for Vitest.
 *
 * Browser extension builds must not see direct Node built-in imports here;
 * Vite/Rolldown rewrites those to browser external shims that fail in
 * extension pages. The split specifier plus @vite-ignore keeps this fallback
 * out of the browser module graph while still letting Node tests read from
 * node_modules.
 */

const WASM_NODE_MODULE_PATH =
  "node_modules/@subspace/reed-solomon-erasure.wasm/dist/reed_solomon_erasure_bg.wasm";

type NodeFs = {
  readFileSync(path: string): Uint8Array;
};

type NodePath = {
  resolve(...parts: string[]): string;
};

async function importNodeModule<T>(name: string): Promise<T> {
  return import(/* @vite-ignore */ (`node:${name}`)) as Promise<T>;
}

export async function readNodeReedSolomonWasmBytes(): Promise<Uint8Array<ArrayBuffer>> {
  const [fs, path] = await Promise.all([
    importNodeModule<NodeFs>("fs"),
    importNodeModule<NodePath>("path"),
  ]);
  const fileBytes = fs.readFileSync(path.resolve(WASM_NODE_MODULE_PATH));
  const bytes: Uint8Array<ArrayBuffer> = new Uint8Array(fileBytes.byteLength);
  bytes.set(fileBytes);
  return bytes;
}