#!/usr/bin/env node
// Вычисляет версию продукта из git-тега (docs/ci-cd.md#версионирование).
//   node scripts/version.mjs v1.2.3        → печатает KEY=VALUE (для $GITHUB_ENV / $GITHUB_OUTPUT)
//   node scripts/version.mjs               → берёт GITHUB_REF_NAME, иначе 0.0.0-dev
//
// Android versionCode = MAJOR·1 000 000 + MINOR·10 000 + PATCH·100 + (99 для релиза | N для -rc.N),
// поэтому 1.2.0-rc.1 < 1.2.0-rc.2 < 1.2.0 < 1.2.1.

import { resolve } from 'node:path';
import { fileURLToPath } from 'node:url';

const TAG_RE = /^v?(\d+)\.(\d+)\.(\d+)(?:-rc\.(\d+))?$/;

export function parseVersion(tag) {
  const m = TAG_RE.exec(tag.trim());
  if (!m) throw new Error(`not a release tag: ${tag} (expected vMAJOR.MINOR.PATCH or vMAJOR.MINOR.PATCH-rc.N)`);
  const [major, minor, patch] = [m[1], m[2], m[3]].map(Number);
  const rc = m[4] === undefined ? null : Number(m[4]);
  if (minor > 99 || patch > 99) throw new Error(`minor and patch must be <= 99: ${tag}`);
  if (rc !== null && (rc < 1 || rc > 98)) throw new Error(`rc number must be 1..98: ${tag}`);
  const version = `${major}.${minor}.${patch}${rc === null ? '' : `-rc.${rc}`}`;
  const versionCode = major * 1_000_000 + minor * 10_000 + patch * 100 + (rc ?? 99);
  return { version, versionCode, prerelease: rc !== null };
}

function main() {
  const tag = process.argv[2] ?? process.env.GITHUB_REF_NAME ?? '';
  const v = TAG_RE.test(tag) ? parseVersion(tag) : { version: '0.0.0-dev', versionCode: 1, prerelease: true };
  process.stdout.write(
    `PIPU_VERSION=${v.version}\nPIPU_VERSION_CODE=${v.versionCode}\nPIPU_PRERELEASE=${v.prerelease}\n`,
  );
}

if (process.argv[1] && fileURLToPath(import.meta.url) === resolve(process.argv[1])) {
  main();
}