import java.io.File
import java.io.FileInputStream
import java.io.FileOutputStream
import java.util.regex.Pattern

fun main(args: Array<String>) {
    FileManager("/Users/mrbimc/Documents/icons/", "/Users/mrbimc/Documents/icons-sorted/").doWork()
}

public class FileManager(val source : String, val dest : String) {

    public fun doWork() {
        readDirectory(File(source))
    }

    private fun readDirectory(dir : File) {
        for (file in dir.listFiles()) {
            if (file.isDirectory()) readDirectory(file)
            else moveFile(file)
        }
    }



    private fun moveFile(file : File) {
        val istream = FileInputStream(file)
        val ostream = FileOutputStream(getDestPath(file) + "/ic_udn_" + file.getName())
        val buffer = ByteArray(1024)
        var read : Int
        while (true) {
            read = istream.read(buffer)
            if (read == -1) break;
            else ostream.write(buffer, 0, read)
        }
        ostream.flush()
        ostream.close()
        istream.close()
    }

    private fun getDestPath(file : File) : String {
        val fileDir = file.getParent()
        var result = dest
        if (fileDir.contains("(1)"))
            result += "drawable-xxhdpi"
        else if (fileDir.contains("(2)"))
            result += "drawable-xhdpi"
        else if (fileDir.contains("(3)"))
            result += "drawable-hdpi"
        else result += "drawable-xxxhdpi"
        return result
    }
}

fun String.contains(pattern : String) : Boolean {
    val pat = Pattern.compile(pattern)
    return pat.matcher(this).find()
}