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package org.bdware.dogp.codec;

import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.UnknownHostException;

public class InetAddressUtil {
    public static byte[] convertInetSocketAddressToBytes(InetSocketAddress address) {
        byte[] ipAndPort = new byte[6];
        int port = address.getPort();
        System.arraycopy(address.getAddress().getAddress(), 0, ipAndPort, 0, 4);
        ipAndPort[4] = (byte) ((port & 0xff00) >> 8);
        ipAndPort[5] = (byte) (port & 0xff);
        return ipAndPort;
    }

    public static InetSocketAddress convertBytesToInetSocketAddress(byte[] bytes) {
        byte[] address = new byte[4];
        System.arraycopy(bytes, 0, address, 0, 4);
        try {
            InetAddress dstAddress = InetAddress.getByAddress(address);
            int dstPort = ((bytes[4] << 8) + bytes[5]) & 0xffff;
            return new InetSocketAddress(dstAddress, dstPort);
        } catch (UnknownHostException e) {
            throw new RuntimeException(e);
        }
    }

    public static byte[] convertIpPortToBytes(String ip, int port) {
        byte[] ipAndPort = new byte[6];
        String[] splited = ip.split("\\.");
        assert splited.length == 4;
        for (int i = 0; i < splited.length; i++) {
            int val = Integer.valueOf(splited[i]);
            ipAndPort[i] = (byte) (val & 0xff);
        }
        ipAndPort[4] = (byte) ((port & 0xff00) >> 8);
        ipAndPort[5] = (byte) (port & 0xff);
        return ipAndPort;
    }
    public static boolean notEmpty(byte[] data) {
        if (data != null) {
            for (byte b : data) {
                if (b != 0) return true;
            }
        }
        return false;
    }
}