#!/usr/bin/env node

import fs from 'node:fs';
import path from 'node:path';
import { parseArgs } from 'node:util';
import semver from 'semver';

function bump(fileName, version, releaseType = 'patch') {
    const filePath = path.resolve(process.cwd(), fileName);

    if (!fs.existsSync(filePath)) {
        throw new Error(`File not found: ${filePath}`);
    }

    const json = JSON.parse(fs.readFileSync(filePath, 'utf8'));
    const currentVersion = json.version;

    if (typeof currentVersion !== 'string') {
        throw new Error(`${fileName} does not contain a string "version" field.`);
    }

    const nextVersion = version ?? semver.inc(currentVersion, releaseType);

    if (!nextVersion) {
        throw new Error(`Unsupported semver format: "${currentVersion}"`);
    }

    json.version = nextVersion;

    fs.writeFileSync(filePath, `${JSON.stringify(json, null, 4)}\n`, 'utf8');
    console.log(`Bumped version in ${fileName} to ${nextVersion}`);
    return nextVersion;
}

const { values } = parseArgs({
    options: {
        'release-type': { type: 'string', short: 'r' },
    },
    strict: true,
    allowPositionals: false,
});

const releaseType = values['release-type'] ?? 'patch';
if (!['major', 'minor', 'patch'].includes(releaseType)) {
    throw new Error(`Invalid --release-type '${releaseType}'. Allowed: major, minor, patch.`);
}

const bumpedVersion = bump('package.json', undefined, releaseType);
bump('package-lock.json', bumpedVersion);