package com.juick.ws;

import com.juick.User;
import com.juick.json.MessageSerializer;
import com.juick.server.MessagesQueries;
import com.juick.server.SubscriptionsQueries;
import com.juick.xmpp.JID;
import com.juick.xmpp.Message;
import com.juick.xmpp.Stream;
import com.juick.xmpp.StreamComponent;
import com.juick.xmpp.extensions.JuickMessage;
import org.apache.commons.lang3.math.NumberUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.env.Environment;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.socket.TextMessage;

import javax.inject.Inject;
import java.io.IOException;
import java.net.Socket;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.stream.Collectors;

/**
 *
 * @author ugnich
 */
@Component
public class XMPPConnection implements Stream.StreamListener, Message.MessageListener {
    private static final Logger logger = LoggerFactory.getLogger(XMPPConnection.class);

    @Inject
    JdbcTemplate jdbc;
    ExecutorService service;
    Stream xmpp;
    String xmppPassword;
    MessageSerializer ms;
    @Inject
    WebsocketComponent wsHandler;

    @Inject
    public XMPPConnection(Environment env, ExecutorService service) {
        this.service = service;
        xmppPassword = env.getProperty("xmpp_password");
        ms = new MessageSerializer();
        try {
            Socket socket = new Socket("localhost", NumberUtils.toInt(env.getProperty("xmpp_port", ""), 5347));
            xmpp = new StreamComponent(new JID(env.getProperty("ws_jid", "ws.juick.local")), socket.getInputStream(), socket.getOutputStream(), xmppPassword);
            xmpp.addChildParser(new JuickMessage());
            xmpp.addListener((Stream.StreamListener) this);
            xmpp.addListener((Message.MessageListener) this);
            service.submit(() -> xmpp.startParsing());
        } catch (IOException e) {
            logger.error("XMPPConnection error", e);
        }
    }


    @Override
    public void onStreamReady() {
       logger.info("XMPP stream ready");
    }

    @Override
    public void onStreamFail(Exception ex) {
        logger.error("XMPP stream failed", ex);
    }

    @Override
    public void onMessage(com.juick.xmpp.Message msg) {
        JuickMessage jmsg = (JuickMessage) msg.getChild(JuickMessage.XMLNS);
        if (jmsg != null) {
            logger.info("got jmsg: " + ms.serialize(jmsg).toString());
            if (jmsg.getMID() == 0) {
                int uid_to = 0;
                try {
                    uid_to = Integer.parseInt(msg.to.Username);
                } catch (Exception e) {
                }
                if (uid_to > 0) {
                    onJuickPM(uid_to, jmsg);
                }
            } else if (jmsg.getRID() == 0) {
                onJuickMessagePost(jmsg);
            } else {
                // to get quote
                com.juick.Message reply = MessagesQueries.getReply(jdbc, jmsg.getMID(), jmsg.getRID());
                onJuickMessageReply(reply);
            }
        }
    }

    MessageSerializer messageSerializer = new MessageSerializer();

    private void onJuickPM(int uid_to, com.juick.Message jmsg) {
        String json = messageSerializer.serialize(jmsg).toString();
        synchronized (wsHandler.clients) {
            wsHandler.clients.stream().filter(c -> !c.legacy && c.visitor.getUID() == uid_to).forEach(c -> {
                try {
                    logger.info("sending pm to " + c.visitor.getUID());
                    c.session.sendMessage(new TextMessage(json));
                } catch (IOException e) {
                    logger.warn("ws error", e);
                }
            });
        }
    }

    private void onJuickMessagePost(com.juick.Message jmsg) {
        String json = messageSerializer.serialize(jmsg).toString();
        List<Integer> uids = SubscriptionsQueries.getSubscribedUsers(jdbc, jmsg.getUser().getUID(), jmsg.getMID())
                .stream().map(User::getUID).collect(Collectors.toList());
        synchronized (wsHandler.clients) {
            wsHandler.clients.stream().filter(c ->
                    (!c.legacy && c.visitor.getUID() == 0) // anonymous users
                    || (!c.legacy && uids.contains(c.visitor.getUID()))) // subscriptions
                    .forEach(c -> {
                try {
                    logger.info("sending message to " + c.visitor.getUID());
                    c.session.sendMessage(new TextMessage(json));
                } catch (IOException e) {
                    logger.warn("ws error", e);
                }
            });
            wsHandler.clients.stream().filter(c ->
                    c.legacy && c.allMessages) // legacy all posts
                    .forEach(c -> {
                try {
                    logger.info("sending message to legacy client " + c.visitor.getUID());
                    c.session.sendMessage(new TextMessage(json));
                } catch (IOException e) {
                    logger.warn("ws error", e);
                }
            });
        }
    }

    private void onJuickMessageReply(com.juick.Message jmsg) {
        String json = messageSerializer.serialize(jmsg).toString();
        List<Integer> threadUsers =
                SubscriptionsQueries.getUsersSubscribedToComments(jdbc, jmsg.getMID(), jmsg.getUser().getUID())
                        .stream().map(User::getUID).collect(Collectors.toList());
        synchronized (wsHandler.clients) {
            wsHandler.clients.stream().filter(c ->
                    (!c.legacy && c.visitor.getUID() == 0) // anonymous users
                    || (!c.legacy && threadUsers.contains(c.visitor.getUID()))) // subscriptions
                    .forEach(c -> {
                try {
                    logger.info("sending reply to " + c.visitor.getUID());
                    c.session.sendMessage(new TextMessage(json));
                } catch (IOException e) {
                    logger.warn("ws error", e);
                }
            });
            wsHandler.clients.stream().filter(c ->
                    (c.legacy && c.allReplies) || (c.legacy && c.MID == jmsg.getMID())) // legacy replies
                    .forEach(c -> {
                try {
                    logger.info("sending reply to legacy client " + c.visitor.getUID());
                    c.session.sendMessage(new TextMessage(json));
                } catch (IOException e) {
                    logger.warn("ws error", e);
                }
            });
        }
    }
}