package com.baozun.web.helpers;

import java.io.IOException;

import java.io.InputStream;

import java.net.InetAddress;

import java.net.Socket;

import java.security.KeyStore;

import java.security.Principal;

import java.security.PrivateKey;

import java.security.SecureRandom;

import java.security.cert.Certificate;

import java.security.cert.X509Certificate;

import java.util.Arrays;

import java.util.LinkedHashMap;

import java.util.Map;

import javax.net.ssl.KeyManager;

import javax.net.ssl.SSLContext;

import javax.net.ssl.SSLSocket;

import javax.net.ssl.SSLSocketFactory;

import javax.net.ssl.TrustManager;

import javax.net.ssl.X509KeyManager;

import javax.net.ssl.X509TrustManager;

/**
 *
 * Used for ssl tests to simplify setup.
 *
 */

public final class TrustingSSLSocketFactory extends SSLSocketFactory implements

        X509TrustManager, X509KeyManager {

    private static final Map<String, SSLSocketFactory> sslSocketFactories = new LinkedHashMap<String, SSLSocketFactory>();

    private static final char[] KEYSTORE_PASSWORD = "password".toCharArray();

    private final static String[] ENABLED_CIPHER_SUITES = { "SSL_RSA_WITH_3DES_EDE_CBC_SHA" };

    private final SSLSocketFactory delegate;

    private final String serverAlias;

    private final PrivateKey privateKey;

    private final X509Certificate[] certificateChain;

    private TrustingSSLSocketFactory(String serverAlias) {

        try {

            SSLContext sc = SSLContext.getInstance("TLSv1.2");

            sc.init(new KeyManager[] { this }, new TrustManager[] { this },

                    new SecureRandom());

            this.delegate = sc.getSocketFactory();

        } catch (Exception e) {

            throw new RuntimeException(e);

        }

        this.serverAlias = serverAlias;

        if (serverAlias.isEmpty()) {

            this.privateKey = null;

            this.certificateChain = null;

        } else {

            try {

                KeyStore keyStore = loadKeyStore(TrustingSSLSocketFactory.class

                        .getResourceAsStream("/keystore.jks"));

                this.privateKey = (PrivateKey) keyStore.getKey(serverAlias,

                        KEYSTORE_PASSWORD);

                Certificate[] rawChain = keyStore

                        .getCertificateChain(serverAlias);

                this.certificateChain = Arrays.copyOf(rawChain,

                        rawChain.length, X509Certificate[].class);

            } catch (Exception e) {

                throw new RuntimeException(e);

            }

        }

    }

    public static SSLSocketFactory get() {

        return get("");

    }

    public synchronized static SSLSocketFactory get(String serverAlias) {

        if (!sslSocketFactories.containsKey(serverAlias)) {

            sslSocketFactories.put(serverAlias, new TrustingSSLSocketFactory(

                    serverAlias));

        }

        return sslSocketFactories.get(serverAlias);

    }

    static Socket setEnabledCipherSuites(Socket socket) {

        SSLSocket.class.cast(socket).setEnabledCipherSuites(

                ENABLED_CIPHER_SUITES);

        return socket;

    }

    private static KeyStore loadKeyStore(InputStream inputStream)

            throws IOException {

        try {

            KeyStore keyStore = KeyStore.getInstance("JKS");

            keyStore.load(inputStream, KEYSTORE_PASSWORD);

            return keyStore;

        } catch (Exception e) {

            throw new RuntimeException(e);

        } finally {

            inputStream.close();

        }

    }

    @Override

    public String[] getDefaultCipherSuites() {

        return ENABLED_CIPHER_SUITES;

    }

    @Override

    public String[] getSupportedCipherSuites() {

        return ENABLED_CIPHER_SUITES;

    }

    @Override

    public Socket createSocket(Socket s, String host, int port,

            boolean autoClose) throws IOException {

        return setEnabledCipherSuites(delegate.createSocket(s, host, port,

                autoClose));

    }

    @Override

    public Socket createSocket(String host, int port) throws IOException {

        return setEnabledCipherSuites(delegate.createSocket(host, port));

    }

    @Override

    public Socket createSocket(InetAddress host, int port) throws IOException {

        return setEnabledCipherSuites(delegate.createSocket(host, port));

    }

    @Override

    public Socket createSocket(String host, int port, InetAddress localHost,

            int localPort) throws IOException {

        return setEnabledCipherSuites(delegate.createSocket(host, port,

                localHost, localPort));

    }

    @Override

    public Socket createSocket(InetAddress address, int port,

            InetAddress localAddress, int localPort) throws IOException {

        return setEnabledCipherSuites(delegate.createSocket(address, port,

                localAddress, localPort));

    }

    public X509Certificate[] getAcceptedIssuers() {

        return null;

    }

    public void checkClientTrusted(X509Certificate[] certs, String authType) {

    }

    public void checkServerTrusted(X509Certificate[] certs, String authType) {

    }

    @Override

    public String[] getClientAliases(String keyType, Principal[] issuers) {

        return null;

    }

    @Override

    public String chooseClientAlias(String[] keyType, Principal[] issuers,

            Socket socket) {

        return null;

    }

    @Override

    public String[] getServerAliases(String keyType, Principal[] issuers) {

        return null;

    }

    @Override

    public String chooseServerAlias(String keyType, Principal[] issuers,

            Socket socket) {

        return serverAlias;

    }

    @Override

    public X509Certificate[] getCertificateChain(String alias) {

        return certificateChain;

    }

    @Override

    public PrivateKey getPrivateKey(String alias) {

        return privateKey;

    }

}