#!/usr/bin/env groovy

File.metaClass.copy = {String destName ->
  if(delegate.isFile()){
    new File(destName).withOutputStream{ out ->
      out.write delegate.readBytes()
    }
  } else if (delegate.isDirectory()) {
    (new File(destName)).mkdirs()
    delegate.eachFileRecurse({
      def newLocation = it.path.replaceFirst(delegate.path, destName)
      it.copy((new File(newLocation)).canonicalPath)
    })
  }
}

def commandParams = this.args as List

def asIndex = commandParams.findIndexOf{it == "as"}
def toIndex = commandParams.findIndexOf{it == "to"}

def minIndex = asIndex != -1 && toIndex != -1 ? Math.min(asIndex, toIndex) : Math.max(asIndex, toIndex)

assert minIndex >= 1, "missing source name"
if (asIndex != -1)
  assert asIndex + 1 < commandParams.size(), "missing new name"

if (toIndex != -1)
  assert toIndex + 1 < commandParams.size(), "missing target name"

def sourceName = commandParams[0]
def targetName = asIndex != -1 ? commandParams[asIndex + 1] : (new File(sourceName)).name

def targetLocation = toIndex != -1 ? commandParams[toIndex + 1] : "."

def targetLocationFile = new File(targetLocation + (targetLocation.endsWith(File.separator) ? "" : File.separator) + targetName)

assert !targetLocationFile.exists()
(new File(sourceName)).copy(targetLocationFile.absolutePath)