package se.nekotronic.onepinger;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.Socket;
import java.io.BufferedWriter;
import java.net.UnknownHostException;

import android.os.AsyncTask;
import android.util.Log;

public class OnePingTask extends AsyncTask<Object, Void, Void> {
	@Override
	protected Void doInBackground(Object... params) {
		MainActivity parent = (MainActivity) params[0];
		String host = (String) params[1];
		int port = (Integer) params[2];
		try {
			parent.print("Connecting to " + host + "...");
			Socket socket = new Socket(host, port);
			parent.print("Connected.");
			BufferedReader from_server = new BufferedReader(new InputStreamReader(socket.getInputStream()));
			PrintWriter to_server = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())), true);
			// true: PrintWriter is line buffered
			parent.print("Sending PING to server...");
			to_server.println("PING");
			Log.d("*** OnePinger", "Waiting for a line from the server...");
			String line_from_server = from_server.readLine();
			if (line_from_server == null) {
				parent.print("Nothing to read from server.");
			}
			else {
				parent.print("Got line from server: '" + line_from_server + "'");
			}
			to_server.close();
			from_server.close();
			socket.close();
		} catch (UnknownHostException e) {
			parent.warning("Unknown host: " + e.getMessage());
		} catch (IOException e) {
			parent.warning("I/O Exception: " + e.getMessage());
		}
		return null;
	}
} // OnePingTask