import java.io.*;
import java.net.*;
import java.util.Random;

import javax.net.ssl.*;

public class Network {
	//Anfang Atribute
	private String user = "";
	private String pass = "";
	private String auth_url = "https://www.die-staemme.de/page/auth";
	private String ds = "www.die-staemme.de";
	private URL url;
	private String lastCSRFToken = "";
	//Ende Atribute

	//Anfang Operationen
	public Network() {
	}
	//Ende Operationen

	public void setUser(String pUser) {
		user = pUser;
	}

	public void setPass(String pPass) {
		pass = pPass;
	}

	private String getContentLenght() {
		int i = 30 + user.length() + pass.length();
		return Integer.toString(i);
	}

	private void setLastCSRFToken(String pToken) {
		lastCSRFToken = pToken;
	}

	private String getRandomCSRFToken() {
		Random rand = new Random();
		String s = "";
		int nextHexad;
		for (int i = 0; i < 6; i++) {
			nextHexad = rand.nextInt();
			s += Integer.toHexString(nextHexad);
			rand.setSeed(rand.nextLong()-rand.nextInt());
		}
		setLastCSRFToken(s);
		return s;
	}

	private byte[] getAuthParams() {
		String s = "username="+user+"&password="+pass+"&remember=1";
		try {
			return s.getBytes("UTF-8");
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
			return "error".getBytes();
		}
	}

	public void auth() {
		try {
			url = new URL(auth_url);
			HttpsURLConnection con = (HttpsURLConnection)url.openConnection();
			con.setRequestMethod("POST");
			con.setRequestProperty("Host", ds);
			con.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:47.0) Gecko/20100101 Firefox/47.0");
			con.setRequestProperty("Accept", "application/json, text/javascript, */*; q=0.01");
			con.setRequestProperty("Accept-Language", "de-DE,de;q=0.9");
			con.setRequestProperty("Accept-Encoding", "gzip, deflate, br");
			con.setRequestProperty("Referer", "https://"+ds+"/");
			con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
			con.setRequestProperty("X-CSRF-Token", getRandomCSRFToken());
			con.setRequestProperty("X-Requested-With", "XMLHttpRequest");
			con.setRequestProperty("Content-Length", getContentLenght());
			con.setRequestProperty("Connection", "keep-alive");
			con.setDoOutput(true);
			con.setDoInput(true);
			//writing the params with outputstream, outputstreamwriter & bufferedwriter
//			con.getOutputStream().write(getAuthParams());
//			con.getOutputStream().flush();
			BufferedReader bR = new BufferedReader( new InputStreamReader(con.getInputStream()));
			do {
				System.out.println(bR.readLine());
			} while (bR.ready());
		} catch (MalformedURLException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}