const fs = require('node:fs')
const path = require('node:path')

const projectRoot = path.resolve(__dirname, '..')
const sourceDir = path.join(projectRoot, 'static', 'nav-assets')
const h5Root = path.join(projectRoot, 'dist', 'build', 'h5')
const targetDir = path.join(h5Root, 'static', 'nav-assets')
const faviconSource = path.join(projectRoot, 'public', 'favicon.svg')
const faviconTarget = path.join(h5Root, 'favicon.svg')

if (!fs.existsSync(h5Root)) {
  throw new Error(`H5 build output not found: ${h5Root}`)
}

if (!fs.existsSync(sourceDir)) {
  throw new Error(`Navigation assets not found: ${sourceDir}`)
}

const copyDirectory = (source, target) => {
  fs.mkdirSync(target, { recursive: true })

  for (const entry of fs.readdirSync(source, { withFileTypes: true })) {
    const sourcePath = path.join(source, entry.name)
    const targetPath = path.join(target, entry.name)

    if (entry.isDirectory()) {
      copyDirectory(sourcePath, targetPath)
      continue
    }

    if (entry.isFile()) {
      fs.copyFileSync(sourcePath, targetPath)
    }
  }
}

fs.rmSync(targetDir, { recursive: true, force: true })
copyDirectory(sourceDir, targetDir)

if (fs.existsSync(faviconSource)) {
  fs.copyFileSync(faviconSource, faviconTarget)
}

console.log(`Copied navigation assets to ${path.relative(projectRoot, targetDir)}`)