import android.graphics.*
import android.text.TextPaint
import android.text.style.TypefaceSpan
import java.util.*
import java.util.regex.Pattern
import java.io.*
import java.math.BigInteger
import java.security.MessageDigest
import java.security.NoSuchAlgorithmException
import kotlin.experimental.and
import android.text.TextUtils
import android.util.Log
import com.amazonaws.util.Md5Utils


/**
 * Created by armshare on 22/2/2018 AD.
 */

fun String.isValidEmail(): Boolean {
    val expression = "^[\\w\\.]+@([\\w]+\\.)+[A-Z]{2,7}$"
    val inputString = this
    val pattern = Pattern.compile(expression, Pattern.CASE_INSENSITIVE)
    val matcher = pattern.matcher(inputString)
    return matcher.matches()
}

fun LinkedHashMap<String,String>.getKeyByIndex(index:Int):String{
    return keys.toTypedArray()[index]
}

fun LinkedHashMap<String,String>.getValueByIndex(index:Int):String{
    return values.toTypedArray()[index]
}

fun File.lengthInMegaByte():Long {
    return (Math.ceil(((length() / (1024 * 1024) * 10).toDouble())) / 10).toLong()
}

fun Long.convertToMegaByte():Long{
    return (Math.ceil(((this / (1024 * 1024) * 10).toDouble())) / 10).toLong()

}

fun File.getAllChild(): List<File>{
    val inFiles = ArrayList<File>()
    val files = LinkedList<File>()
    if (listFiles() != null && listFiles().isNotEmpty()){
        files.addAll(listFiles())
        while (!files.isEmpty()) {
            val file = files.remove()
            if (file.isDirectory) {
                files.addAll(file.listFiles())
            }
            else
                inFiles.add(file)
        }
    }

    return inFiles
}

fun Long.suffixScaleNumber(): String {
    if (this < 1000) return "" + this
    val exp = (Math.log(this.toDouble()) / Math.log(1000.0)).toInt()

    var string = String.format("%.1f",
            this / Math.pow(1000.0, exp.toDouble()))

    if(string.endsWith(".0"))
        string = string.replace(".0" , "")
    return string+"KMB"[exp - 1]
}


fun File.md5Hex():String{
    val result = StringBuffer()
    val HEX_CHARS = "0123456789ABCDEF".toCharArray()

    Md5Utils.computeMD5Hash(this)
            .forEach {
                val octet = it.toInt()
                val firstIndex = (octet and 0xF0).ushr(4)
                val secondIndex = octet and 0x0F
                result.append(HEX_CHARS[firstIndex])
                result.append(HEX_CHARS[secondIndex])
            }

    return result.toString()
}