#!/usr/bin/env node

import fs from 'fs';
import path from 'path';
import { fileURLToPath } from 'url';

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

const packageJsonPath = path.join(__dirname, '../package.json');

function readVersion() {
  const packageJson = JSON.parse(fs.readFileSync(packageJsonPath, 'utf8'));
  return packageJson.version;
}

function parseVersion(versionStr) {
  const match = versionStr.match(/^v?(\d+)\.(\d+)\.(\d+)$/i);
  if (!match) {
    throw new Error(`无效的版本号格式: ${versionStr}，应为 V{major}.{minor}.{patch}`);
  }
  return {
    major: parseInt(match[1], 10),
    minor: parseInt(match[2], 10),
    patch: parseInt(match[3], 10)
  };
}

function incrementVersion(currentVersion) {
  const { major, minor, patch } = parseVersion(currentVersion);
  
  if (patch >= 20) {
    return {
      major,
      minor: minor + 1,
      patch: 0
    };
  }
  
  return {
    major,
    minor,
    patch: patch + 1
  };
}

function formatVersion({ major, minor, patch }) {
  return `V${major}.${minor}.${patch}`;
}

function updatePackageJson(newVersion) {
  const packageJson = JSON.parse(fs.readFileSync(packageJsonPath, 'utf8'));
  packageJson.version = newVersion;
  fs.writeFileSync(packageJsonPath, JSON.stringify(packageJson, null, 2) + '\n', 'utf8');
}

function main() {
  try {
    const currentVersion = readVersion();
    console.log(`当前版本: ${currentVersion}`);
    
    const newVersionObj = incrementVersion(currentVersion);
    const newVersion = formatVersion(newVersionObj);
    
    console.log(`新版本号: ${newVersion}`);
    
    updatePackageJson(newVersion);
    console.log(`package.json 已更新`);
    
    console.log(`\n如需创建git tag，请执行:`);
    console.log(`git tag ${newVersion.toLowerCase()}`);
    console.log(`git push origin ${newVersion.toLowerCase()}`);
    
  } catch (error) {
    console.error(`错误: ${error.message}`);
    process.exit(1);
  }
}

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

export {
  readVersion,
  parseVersion,
  incrementVersion,
  formatVersion,
  updatePackageJson
};