/*
 * Juick
 * Copyright (C) 2008-2011, Ugnich Anton
 *
 * 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.juick.Message;
import com.juick.Tag;
import com.juick.User;
import com.juick.service.TagService;
import com.juick.service.UserService;
import com.juick.www.controllers.PageTemplates;
import org.apache.commons.lang3.BooleanUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.math.NumberUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.env.Environment;
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.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Stream;

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

    private ExternalComponent xmpp;

    Environment env;
    PageTemplates templates;
    UserService userService;
    TagService tagService;

    private String imgDir;
    private String tmpDir;

    public WebApp(Environment env, PageTemplates templates, UserService userService, TagService tagService) {
        this.env = env;
        this.templates = templates;
        this.userService = userService;
        this.tagService = tagService;
        tmpDir = env.getProperty("upload_tmp_dir", "/var/www/juick.com/i/tmp/");
        imgDir = env.getProperty("img_path", "/var/www/juick.com/i/");
        boolean isXmppDisabled = BooleanUtils.toBoolean(env.getProperty("xmpp_disabled"));
        if (!isXmppDisabled) {
            setupXmppComponent(Jid.of(env.getProperty("www_xmpp_jid", "www.juick.local")),
                    env.getProperty("xmpp_password"), NumberUtils.toInt(env.getProperty("xmpp_port", StringUtils.EMPTY), 5347));
        }
    }

    @Override
    public void close() {
        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, "localhost", 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 com.juick.User getVisitorUser(HttpServletRequest request, HttpServletResponse response) {
        String hash = Utils.getCookie(request, "hash");
        if (hash != null) {
            com.juick.User visitor = userService.getUserByHash(hash);
            if (response != null && visitor.getUid() > 0) {
                response.setHeader("X-Username", visitor.getName());
            }
            return visitor;
        } else {
            return new User();
        }
    }

    public String getImgDir() {
        return imgDir;
    }

    public String getTmpDir() {
        return tmpDir;
    }

    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.toArray(String[]::new), true);
            while (tags.size() > 5) {
                tags.remove(5);
            }
        }
        return tags;
    }
}