/** Shared helpers for drive-resident /bin scripts (prepended before each command). */
function bareStdin(ctx) {
  return typeof ctx.shellStdin === 'string' ? ctx.shellStdin : ''
}

function count(s) {
  const lines = (s.match(/\n/g) || []).length
  const words = s.trim() ? s.trim().split(/\s+/).length : 0
  const bytes = new TextEncoder().encode(s).length
  return { lines, words, bytes }
}

async function run(ctx, argv) {
  const vfs = ctx.vfs
  const files = argv.slice(1).filter((a) => !a.startsWith('-'))
  if (!files.length) {
    const s = bareStdin(ctx)
    const c = count(s)
    ctx.console.log(' ' + c.lines + ' ' + c.words + ' ' + c.bytes)
    return
  }
  let tLines = 0
  let tWords = 0
  let tBytes = 0
  for (const f of files) {
    const buf = await vfs.readFile(f)
    if (!buf) {
      ctx.console.error('wc: ' + f + ': No such file')
      continue
    }
    const s = ctx.b4a.toString(buf)
    const c = count(s)
    tLines += c.lines
    tWords += c.words
    tBytes += c.bytes
    ctx.console.log(' ' + c.lines + ' ' + c.words + ' ' + c.bytes + ' ' + f)
  }
  if (files.length > 1) {
    ctx.console.log(' ' + tLines + ' ' + tWords + ' ' + tBytes + ' total')
  }
}