import { readFileSync, writeFileSync } from "node:fs";
import { resolve } from "node:path";

const files = [
	"frontend/package.json",
	"frontend/package-lock.json",
	"build/config.yml",
	"frontend/src/lib/dialogs/SettingsModal.svelte",
	"flake.nix",
];

const semver_re = /^(\d+)\.(\d+)\.(\d+)$/;
const input = process.argv[2];

if (!input) {
	console.error("usage: node scripts/version.mjs <major|minor|patch|x.y.z>");
	process.exit(1);
}

const current_version = JSON.parse(
	readFileSync(resolve("frontend/package.json"), "utf8"),
).version;

const match = current_version.match(semver_re);
if (!match) {
	throw new Error(
		`frontend/package.json version not semver: ${current_version}`,
	);
}

const [, major, minor, patch] = match;
const new_version =
	input === "major"
		? `${Number(major) + 1}.0.0`
		: input === "minor"
			? `${major}.${Number(minor) + 1}.0`
			: input === "patch"
				? `${major}.${minor}.${Number(patch) + 1}`
				: input;

if (!semver_re.test(new_version)) {
	throw new Error(`invalid semver: ${input}`);
}

if (new_version === current_version) {
	console.log(`version unchanged: ${current_version}`);
	process.exit(0);
}

for (const path of files) {
	const resolved = resolve(path);
	const original = readFileSync(resolved, "utf8");
	const count = original.split(current_version).length - 1;

	if (count === 0) {
		throw new Error(`missing ${current_version} in ${path}`);
	}

	writeFileSync(resolved, original.replaceAll(current_version, new_version));
	console.log(`updated ${path} (${count})`);
}

console.log(`bumped ${current_version} -> ${new_version}`);