/*
 * Copyright (C) 2008-2019, 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.server;

import com.juick.model.Message;
import com.juick.model.Tag;
import com.juick.model.User;
import com.juick.server.api.SystemActivity;
import com.juick.service.MessagesService;
import com.juick.service.UserService;
import com.juick.service.component.SystemEvent;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;
import javax.inject.Inject;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;

@Component
public class TopManager {
    private static Logger logger = LoggerFactory.getLogger(TopManager.class);
    @Inject
    private MessagesService messagesService;
    @Inject
    private UserService userService;
    @Inject
    private ApplicationEventPublisher applicationEventPublisher;

    @Value("${service_user:juick}")
    private String serviceUsername;

    private User serviceUser;

    @PostConstruct
    public void init() {
        serviceUser = userService.getUserByName(serviceUsername);
    }

    @Scheduled(fixedRate = 3600000)
    public void updateTop() {
        messagesService.getPopularCandidates().forEach(m -> {
            Message jmsg = messagesService.getMessage(m).orElseThrow(IllegalStateException::new);
            logger.info("added {} to popular", m);
            messagesService.setMessagePopular(m, 1);
            List<String> tags = jmsg.getTags().stream().map(Tag::getName).map(String::toLowerCase).collect(Collectors.toList());
            if (!tags.contains("juick")) {
                applicationEventPublisher.publishEvent(new SystemEvent(this,
                        SystemActivity.like(serviceUser, jmsg, Collections.emptyList())));
            }
        });
    }
}