package esptouch.udp;

import android.util.Log;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
import java.net.UnknownHostException;

import esptouch.task.__IEsptouchTask;

/**
 * this class is used to help send UDP data according to length
 *
 * @author afunx
 */
public class UDPSocketClient {

    private static final String TAG = "UDPSocketClient";
    private DatagramSocket mSocket;
    private volatile boolean mIsStop;
    private volatile boolean mIsClosed;

    public UDPSocketClient() {
        try {
            this.mSocket = new DatagramSocket();
            this.mIsStop = false;
            this.mIsClosed = false;
        } catch (SocketException e) {
            if (__IEsptouchTask.DEBUG) {
                Log.w(TAG, "SocketException");
            }
            e.printStackTrace();
        }
    }

    @Override
    protected void finalize() throws Throwable {
        close();
        super.finalize();
    }

    public void interrupt() {
        if (__IEsptouchTask.DEBUG) {
            Log.i(TAG, "USPSocketClient is interrupt");
        }
        this.mIsStop = true;
    }

    /**
     * close the UDP socket
     */
    public synchronized void close() {
        if (!this.mIsClosed) {
            this.mSocket.close();
            this.mIsClosed = true;
        }
    }

    /**
     * send the data by UDP
     *
     * @param data       the data to be sent
     * @param targetPort the port of target
     * @param interval   the milliseconds to between each UDP sent
     */
    public void sendData(byte[][] data, String targetHostName, int targetPort,
                         long interval) {
        sendData(data, 0, data.length, targetHostName, targetPort, interval);
    }


    /**
     * send the data by UDP
     *
     * @param data       the data to be sent
     * @param offset     the offset which data to be sent
     * @param count      the count of the data
     * @param targetPort the port of target
     * @param interval   the milliseconds to between each UDP sent
     */
    public void sendData(byte[][] data, int offset, int count,
                         String targetHostName, int targetPort, long interval) {
        if ((data == null) || (data.length <= 0)) {
            if (__IEsptouchTask.DEBUG) {
                Log.w(TAG, "sendData(): data == null or length <= 0");
            }
            return;
        }
        for (int i = offset; !mIsStop && i < offset + count; i++) {
            if (data[i].length == 0) {
                continue;
            }
            try {
                InetAddress targetInetAddress = InetAddress.getByName(targetHostName);
                DatagramPacket localDatagramPacket = new DatagramPacket(
                        data[i], data[i].length, targetInetAddress, targetPort);
                this.mSocket.send(localDatagramPacket);
            } catch (UnknownHostException e) {
                if (__IEsptouchTask.DEBUG) {
                    Log.w(TAG, "sendData(): UnknownHostException");
                }
                e.printStackTrace();
                mIsStop = true;
                break;
            } catch (IOException e) {
                if (__IEsptouchTask.DEBUG) {
                    Log.w(TAG, "sendData(): IOException, but just ignore it");
                }
                // for the Ap will make some troubles when the phone send too many UDP packets,
                // but we don't expect the UDP packet received by others, so just ignore it
            }
            try {
                Thread.sleep(interval);
            } catch (InterruptedException e) {
                e.printStackTrace();
                if (__IEsptouchTask.DEBUG) {
                    Log.w(TAG, "sendData is Interrupted");
                }
                mIsStop = true;
                break;
            }
        }
        if (mIsStop) {
            close();
        }
    }
}