/**
 * Side-effecting polyfills module for happy-dom / jsdom / bare-Node test
 * environments on WSL2 or older toolchains.
 *
 * Import via vitest `setupFiles`:
 *
 * ```ts
 * // vitest.config.ts
 * export default defineConfig({
 *     test: {
 *         setupFiles: ["@suaveplan/testing/polyfills"],
 *     },
 * });
 * ```
 *
 * Installs:
 * - `globalThis.crypto` (from `node:crypto`'s `webcrypto` export) if missing
 * - `globalThis.TextEncoder` / `TextDecoder` (usually present, covered defensively)
 *
 * Exports nothing. Safe to import multiple times; operations are idempotent.
 */

import { webcrypto } from "node:crypto";
import {
    TextDecoder as NodeTextDecoder,
    TextEncoder as NodeTextEncoder,
} from "node:util";

type WritableGlobal = {
    crypto?: Crypto;
    TextEncoder?: typeof NodeTextEncoder;
    TextDecoder?: typeof NodeTextDecoder;
};

const g = globalThis as unknown as WritableGlobal;

if (
    typeof g.crypto === "undefined" ||
    typeof g.crypto.getRandomValues !== "function"
) {
    g.crypto = webcrypto as unknown as Crypto;
}

if (typeof g.TextEncoder === "undefined") {
    g.TextEncoder = NodeTextEncoder;
}

if (typeof g.TextDecoder === "undefined") {
    g.TextDecoder = NodeTextDecoder;
}