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

const root = resolve(dirname(fileURLToPath(import.meta.url)), "..");
const packageJson = JSON.parse(
	readFileSync(resolve(root, "package.json"), "utf8"),
);
const nvmVersion = readFileSync(resolve(root, ".nvmrc"), "utf8").trim();
const expectedMajor = nvmVersion.replace(/^v/, "").split(".")[0];
const expectedEngine = `${expectedMajor}.x`;

if (packageJson.engines?.node !== expectedEngine) {
	throw new Error(
		`Node runtime contracts disagree: .nvmrc=${nvmVersion}, package.json engines.node=${packageJson.engines?.node ?? "missing"}`,
	);
}

const actualVersion = process.versions.node;
const actualMajor = actualVersion.split(".")[0];
if (actualMajor !== expectedMajor) {
	console.error(
		`Unsupported Node.js runtime: expected ${expectedEngine}, actual ${actualVersion}. Activate .nvmrc before running repository checks.`,
	);
	process.exit(1);
}

console.log(`Node.js runtime verified: ${actualVersion} (${expectedEngine})`);