/**
 *
 * Copyright 2016-2021 Florian Schmaus
 *
 * This file is part of smack-repl.
 *
 * smack-repl is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
 */
package org.igniterealtime.smack.smackrepl;

import java.io.IOException;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.util.Date;
import java.util.logging.Logger;

import org.jivesoftware.smack.SmackException;
import org.jivesoftware.smack.SmackException.NoResponseException;
import org.jivesoftware.smack.SmackException.NotConnectedException;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.XMPPException.XMPPErrorException;
import org.jivesoftware.smack.c2s.ModularXmppClientToServerConnection;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.tcp.XMPPTCPConnection;
import org.jivesoftware.smack.tcp.XMPPTCPConnectionConfiguration;
import org.jivesoftware.smack.util.TLSUtils;
import org.jivesoftware.smackx.disco.ServiceDiscoveryManager;
import org.jivesoftware.smackx.iqregister.AccountManager;

import org.jxmpp.jid.DomainBareJid;
import org.jxmpp.jid.impl.JidCreate;
import org.jxmpp.jid.parts.Localpart;
import org.jxmpp.stringprep.XmppStringprepException;
import org.jxmpp.util.XmppDateTime;

public class XmppTools {

    public static void main(String[] args) throws SmackException, IOException, XMPPException, InterruptedException,
            KeyManagementException, NoSuchAlgorithmException {
        boolean one = createAccount("xmpp.foobar.io", "smack1", "smack1");
        boolean two = createAccount("xmpp.foobar.io", "smack2", "smack2");
        // CHECKSTYLE:OFF
        System.out.println("Account created: " + one + ' ' + two);
        // CHECKSTYLE:ON
    }

    public static boolean supportsIbr(String xmppDomain) throws SmackException, IOException, XMPPException,
            InterruptedException, KeyManagementException, NoSuchAlgorithmException {
        DomainBareJid xmppDomainJid = JidCreate.domainBareFrom(xmppDomain);
        return supportsIbr(xmppDomainJid);
    }

    public static boolean supportsIbr(DomainBareJid xmppDomain) throws SmackException, IOException, XMPPException,
            InterruptedException, KeyManagementException, NoSuchAlgorithmException {
        XMPPTCPConnectionConfiguration.Builder configBuilder = XMPPTCPConnectionConfiguration.builder()
                .setXmppDomain(xmppDomain);
        TLSUtils.acceptAllCertificates(configBuilder);
        XMPPTCPConnectionConfiguration config = configBuilder.build();
        XMPPTCPConnection connection = new XMPPTCPConnection(config);
        connection.connect();
        try {
            return supportsIbr(connection);
        } finally {
            connection.disconnect();
        }
    }

    public static boolean supportsIbr(XMPPConnection connection)
            throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
        AccountManager accountManager = AccountManager.getInstance(connection);
        return accountManager.supportsAccountCreation();
    }

    public static boolean createAccount(String xmppDomain, String username, String password)
            throws KeyManagementException, NoSuchAlgorithmException, SmackException, IOException, XMPPException,
            InterruptedException {
        DomainBareJid xmppDomainJid = JidCreate.domainBareFrom(xmppDomain);
        Localpart localpart = Localpart.from(username);
        return createAccount(xmppDomainJid, localpart, password);
    }

    public static boolean createAccount(DomainBareJid xmppDomain, Localpart username, String password)
            throws KeyManagementException, NoSuchAlgorithmException, SmackException, IOException, XMPPException,
            InterruptedException {
        XMPPTCPConnectionConfiguration.Builder configBuilder = XMPPTCPConnectionConfiguration.builder()
                .setXmppDomain(xmppDomain);
        TLSUtils.acceptAllCertificates(configBuilder);
        XMPPTCPConnectionConfiguration config = configBuilder.build();
        XMPPTCPConnection connection = new XMPPTCPConnection(config);
        connection.connect();
        try {
            if (!supportsIbr(connection))
                return false;

            AccountManager accountManager = AccountManager.getInstance(connection);
            accountManager.createAccount(username, password);
            return true;
        } finally {
            connection.disconnect();
        }
    }

    public static void modularConnectionTest(ModularXmppClientToServerConnection connection, String messageTo) throws XMPPException, SmackException, IOException, InterruptedException {
        connection.addConnectionStateMachineListener((event, c) -> {
            Logger.getAnonymousLogger().info("Connection event: " + event);
        });

        connection.connect();

        connection.login();

        XmppTools.sendItsAlive(messageTo, connection);

        Thread.sleep(1000);

        connection.disconnect();

        ModularXmppClientToServerConnection.Stats connectionStats = connection.getStats();
        ServiceDiscoveryManager.Stats serviceDiscoveryManagerStats = ServiceDiscoveryManager.getInstanceFor(connection).getStats();

        // CHECKSTYLE:OFF
        System.out.println("NIO successfully finished, yeah!\n" + connectionStats + '\n' + serviceDiscoveryManagerStats);
        // CHECKSTYLE:ON
    }

    public static void sendItsAlive(String to, XMPPConnection connection)
                    throws XmppStringprepException, NotConnectedException, InterruptedException {
        if (to == null) {
            return;
        }

        Message message = connection.getStanzaFactory().buildMessageStanza()
                        .to(to)
                        .setBody("It is alive! " + XmppDateTime.formatXEP0082Date(new Date()))
                        .build();
        connection.sendStanza(message);
    }
}