package eu.siacs.conversations.utils;

import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;

import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.X509TrustManager;

public class TLSSocketFactory extends SSLSocketFactory {

    private final SSLSocketFactory internalSSLSocketFactory;

    public TLSSocketFactory(X509TrustManager[] trustManager, SecureRandom random) throws KeyManagementException, NoSuchAlgorithmException {
        SSLContext context = SSLSockets.getSSLContext();
        context.init(null, trustManager, random);
        this.internalSSLSocketFactory = context.getSocketFactory();
    }

    @Override
    public String[] getDefaultCipherSuites() {
        return CryptoHelper.getOrderedCipherSuites(internalSSLSocketFactory.getDefaultCipherSuites());
    }

    @Override
    public String[] getSupportedCipherSuites() {
        return internalSSLSocketFactory.getSupportedCipherSuites();
    }

    @Override
    public Socket createSocket(Socket s, String host, int port, boolean autoClose) throws IOException {
        return enableTLSOnSocket(internalSSLSocketFactory.createSocket(s, host, port, autoClose));
    }

    @Override
    public Socket createSocket(String host, int port) throws IOException {
        return enableTLSOnSocket(internalSSLSocketFactory.createSocket(host, port));
    }

    @Override
    public Socket createSocket(String host, int port, InetAddress localHost, int localPort) throws IOException {
        return enableTLSOnSocket(internalSSLSocketFactory.createSocket(host, port, localHost, localPort));
    }

    @Override
    public Socket createSocket(InetAddress host, int port) throws IOException {
        return enableTLSOnSocket(internalSSLSocketFactory.createSocket(host, port));
    }

    @Override
    public Socket createSocket(InetAddress address, int port, InetAddress localAddress, int localPort) throws IOException {
        return enableTLSOnSocket(internalSSLSocketFactory.createSocket(address, port, localAddress, localPort));
    }

    private static Socket enableTLSOnSocket(Socket socket) {
        if(socket instanceof SSLSocket) {
            SSLSockets.setSecurity((SSLSocket) socket);
        }
        return socket;
    }
}