import semver from 'semver';
import { writeFile, readFile } from 'fs/promises';
import { resolve } from 'path';
import child_process from 'child_process';
import { promisify } from 'util';
import assert from 'assert';

const exec = promisify(child_process.exec);

const rootDir = process.cwd();
const releaseType = process.env.RELEASE_TYPE;
assert.match(releaseType, /^(patch|minor|major)$/, 'Invalid RELEASE_TYPE');

// TODO: if releaseType is `auto` determine release type based on the changelog

const lastTag = (await exec('git describe --tags --match "n8n@*" --abbrev=0')).stdout.trim();
const packages = JSON.parse((await exec('pnpm ls -r --only-projects --json')).stdout);

const packageMap = {};
for (let { name, path, version, private: isPrivate, dependencies } of packages) {
	if (isPrivate && path !== rootDir) continue;
	if (path === rootDir) name = 'monorepo-root';

	const isDirty = await exec(`git diff --quiet HEAD ${lastTag} -- ${path}`)
		.then(() => false)
		.catch((error) => true);

	packageMap[name] = { path, isDirty, version };
}

assert.ok(
	Object.values(packageMap).some(({ isDirty }) => isDirty),
	'No changes found since the last release',
);

// Keep the monorepo version up to date with the released version
packageMap['monorepo-root'].version = packageMap['n8n'].version;

for (const packageName in packageMap) {
	const { path, version, isDirty } = packageMap[packageName];
	const packageFile = resolve(path, 'package.json');
	const packageJson = JSON.parse(await readFile(packageFile, 'utf-8'));

	packageJson.version = packageMap[packageName].nextVersion =
		isDirty ||
		Object.keys(packageJson.dependencies).some(
			(dependencyName) => packageMap[dependencyName]?.isDirty,
		)
			? semver.inc(version, releaseType)
			: version;

	await writeFile(packageFile, JSON.stringify(packageJson, null, 2) + '\n');
}

console.log(packageMap['n8n'].nextVersion);