/*
 * Copyright (C) 2008-2017, Juick
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.juick.www;

import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.juick.Message;
import com.juick.Tag;
import com.juick.service.TagService;
import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import rocks.xmpp.addr.Jid;
import rocks.xmpp.core.XmppException;
import rocks.xmpp.core.session.Extension;
import rocks.xmpp.core.session.XmppSessionConfiguration;
import rocks.xmpp.core.session.debug.LogbackDebugger;
import rocks.xmpp.extensions.component.accept.ExternalComponent;

import javax.annotation.PostConstruct;
import javax.inject.Inject;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.stream.Stream;

/**
 *
 * @author Ugnich Anton
 */
@Component
public class WebApp implements DisposableBean {
    private static Logger logger = LoggerFactory.getLogger(WebApp.class);

    private ExternalComponent xmpp;

    @Inject
    private TagService tagService;
    @Inject
    private ObjectMapper jsonMapper;
    @Value("${xmpp_host:localhost}")
    private String xmppHost;
    @Value("${xmpp_password:secret}")
    private String xmppPassword;
    @Value("${www_xmpp_jid:www.juick.local}")
    private String  xmppJid;
    @Value("${xmpp_port:5347}")
    private int xmppPort;
    @Value("${xmpp_disabled:false}")
    private boolean isXmppDisabled;

    private String scriptsUrl;
    private String styleUrl;

    @PostConstruct
    public void init() throws IOException {
        String manifestString = IOUtils.toString(getClass().getClassLoader().
                getResourceAsStream("manifest.json"), StandardCharsets.UTF_8);
        HashMap<String, String> manifest = jsonMapper.readValue(manifestString,
                new TypeReference<HashMap<String, String>>() {});
        scriptsUrl = manifest.get("scripts.js");
        styleUrl = manifest.get("style.css");
        if (!isXmppDisabled) {
            setupXmppComponent(Jid.of(xmppJid),
                    xmppPassword, xmppPort);
        }
    }

    @Override
    public void destroy() {
        try {
            if (xmpp != null)
                xmpp.close();
            logger.error("ExternalComponent on WWW destroyed");
        } catch (Exception e) {
            logger.error("exception on destroy", e);
        }
    }

    public void setupXmppComponent(final Jid componentJid, final String password, final int port) {
        XmppSessionConfiguration configuration = XmppSessionConfiguration.builder()
                .extensions(Extension.of(Message.class))
                .debugger(LogbackDebugger.class)
                .build();
        xmpp = ExternalComponent.create(componentJid.toString(), password, configuration, xmppHost, port);
        xmpp.addConnectionListener(e -> logger.error(e.toString(), e.getCause()));
        try {
            xmpp.connect();
        } catch (XmppException e) {
            logger.error("xmpp extension", e);
        }
    }

    public ExternalComponent getXmpp() {
        return xmpp;
    }

    public List<Tag> parseTags(String tagsStr) {
        List<Tag> tags = new ArrayList<>();
        if (tagsStr != null && !tagsStr.isEmpty()) {
            Stream<String> tagsList = Arrays.stream(tagsStr.split("[ \\,]"))
                    .distinct().map( t -> {
                if (t.startsWith("*")) {
                    t = t.substring(1);
                }
                if (t.length() > 64) {
                    t = t.substring(0, 64);
                }
                return t;
            });
            tags = tagService.getTags(tagsList, true);
            while (tags.size() > 5) {
                tags.remove(5);
            }
        }
        return tags;
    }

    public String getStyleUrl() {
        return styleUrl;
    }

    public String getScriptsUrl() {
        return scriptsUrl;
    }
}