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

const projectRoot = resolve(dirname(fileURLToPath(import.meta.url)), "..");
const readProjectFile = (path) =>
	readFileSync(resolve(projectRoot, path), "utf8");

const pinnedVersion = readProjectFile(".nvmrc").trim();
assert.match(
	pinnedVersion,
	/^\d+\.\d+\.\d+$/,
	".nvmrc must pin an exact Node.js version",
);

const major = Number.parseInt(pinnedVersion.split(".")[0], 10);
const packageJson = JSON.parse(readProjectFile("package.json"));

assert.equal(
	packageJson.engines?.node,
	`>=${pinnedVersion} <${major + 1}`,
	"package.json engines.node must match the .nvmrc release line",
);
assert.equal(
	Number.parseInt(packageJson.devDependencies?.["@types/node"], 10),
	major,
	"@types/node must match the pinned Node.js major",
);

const nodeImages = [
	...readProjectFile("Dockerfile").matchAll(
		/^FROM\s+(?:--platform=\S+\s+)?node:([^\s]+)\s*/gim,
	),
].map((match) => match[1]);
assert.ok(
	nodeImages.length > 0,
	"Dockerfile must declare a pinned Node.js base image",
);
for (const image of nodeImages) {
	assert.equal(
		image,
		`${pinnedVersion}-alpine`,
		"every Docker Node.js stage must match .nvmrc",
	);
}

if (!process.argv.includes("--static")) {
	assert.equal(
		process.versions.node,
		pinnedVersion,
		"the active Node.js runtime must match .nvmrc",
	);
}

console.log(`Node.js toolchain is aligned on ${pinnedVersion}`);