import fs from "node:fs";
import path from "node:path";

const root = process.cwd();
const pkgPath = path.join(root, "package.json");
const lockPath = path.join(root, "package-lock.json");

const target = String(process.argv[2] || "patch").toLowerCase();
if (!["patch", "minor", "major"].includes(target)) {
  console.error(`[version] unsupported target: ${target}`);
  process.exit(1);
}

function bump(version, mode) {
  const parts = String(version || "0.0.0").split(".").map((v) => Number(v) || 0);
  const [major, minor, patch] = [parts[0] ?? 0, parts[1] ?? 0, parts[2] ?? 0];
  if (mode === "major") return `${major + 1}.0.0`;
  if (mode === "minor") return `${major}.${minor + 1}.0`;
  return `${major}.${minor}.${patch + 1}`;
}

function readJson(filePath) {
  return JSON.parse(fs.readFileSync(filePath, "utf8"));
}

function writeJson(filePath, obj) {
  fs.writeFileSync(filePath, `${JSON.stringify(obj, null, 2)}\n`, "utf8");
}

const pkg = readJson(pkgPath);
const current = String(pkg.version || "0.0.0");
const next = bump(current, target);
pkg.version = next;
writeJson(pkgPath, pkg);

if (fs.existsSync(lockPath)) {
  const lock = readJson(lockPath);
  lock.version = next;
  if (lock.packages && lock.packages[""]) {
    lock.packages[""].version = next;
  }
  writeJson(lockPath, lock);
}

console.log(`[version] ${current} -> ${next} (${target})`);