import * as fs from 'node:fs'
import * as path from 'node:path'

export function formatTargetDir(targetDir: string | undefined) {
  return targetDir?.trim().replace(/\/+$/g, '')
}

export function copy(src: string, dest: string) {
  const stat = fs.statSync(src)
  if (stat.isDirectory()) copyDir(src, dest)
  else fs.copyFileSync(src, dest)
}

function copyDir(srcDir: string, destDir: string) {
  fs.mkdirSync(destDir, { recursive: true })
  for (const file of fs.readdirSync(srcDir)) {
    const srcFile = path.resolve(srcDir, file)
    const destFile = path.resolve(destDir, file)
    copy(srcFile, destFile)
  }
}

export function isValidPackageName(projectName: string) {
  return /^(?:@[a-z\d\-*~][a-z\d\-*._~]*\/)?[a-z\d\-~][a-z\d\-._~]*$/.test(
    projectName,
  )
}

export function toValidPackageName(projectName: string) {
  return projectName
    .trim()
    .toLowerCase()
    .replace(/\s+/g, '-')
    .replace(/^[._]/, '')
    .replace(/[^a-z\d\-~]+/g, '-')
}

export function isEmpty(path: string) {
  const files = fs.readdirSync(path)
  return files.length === 0 || (files.length === 1 && files[0] === '.git')
}

export function emptyDir(dir: string) {
  if (!fs.existsSync(dir)) return
  for (const file of fs.readdirSync(dir)) {
    if (file === '.git') continue
    fs.rmSync(path.resolve(dir, file), { recursive: true, force: true })
  }
}

export function pkgFromUserAgent(userAgent: string | undefined) {
  if (!userAgent) return undefined
  const pkgSpec = userAgent.split(' ')[0]!
  const pkgSpecArr = pkgSpec.split('/')
  return {
    name: pkgSpecArr[0],
    version: pkgSpecArr[1],
  }
}

// function setupReactSwc(root: string, isTs: boolean) {
//   editFile(path.resolve(root, 'package.json'), (content) => {
//     return content.replace(
//       /"@vitejs\/plugin-react": ".+?"/,
//       `"@vitejs/plugin-react-swc": "^3.3.2"`,
//     )
//   })
//   editFile(
//     path.resolve(root, `vite.config.${isTs ? 'ts' : 'js'}`),
//     (content) => {
//       return content.replace('@vitejs/plugin-react', '@vitejs/plugin-react-swc')
//     },
//   )
// }

// function editFile(file: string, callback: (content: string) => string) {
//   const content = fs.readFileSync(file, 'utf-8')
//   fs.writeFileSync(file, callback(content), 'utf-8')
// }