package cc.fascinated.bat.service;

import cc.fascinated.bat.event.EventListener;
import cc.fascinated.bat.model.BatGuild;
import cc.fascinated.bat.model.BatUser;
import lombok.NonNull;
import lombok.extern.log4j.Log4j2;
import net.dv8tion.jda.api.events.guild.member.GuildMemberJoinEvent;
import net.dv8tion.jda.api.events.guild.member.GuildMemberRemoveEvent;
import net.dv8tion.jda.api.hooks.ListenerAdapter;
import org.jetbrains.annotations.NotNull;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.DependsOn;
import org.springframework.stereotype.Service;

import java.util.HashSet;
import java.util.Set;

/**
 * @author Fascinated (fascinated7)
 */
@Service @Log4j2
@DependsOn("discordService")
public class EventService extends ListenerAdapter {
    private final GuildService guildService;
    private final UserService userService;

    /**
     * The list of listeners registered
     */
    public static final Set<EventListener> LISTENERS = new HashSet<>();

    @Autowired
    public EventService(@NonNull GuildService guildService, @NonNull UserService userService, @NonNull ApplicationContext context) {
        this.guildService = guildService;
        this.userService = userService;
        DiscordService.JDA.addEventListener(this);

        context.getBeansOfType(EventListener.class).values().forEach(this::registerListeners);
        log.info("Registered {} listeners.", LISTENERS.size());
    }

    /**
     * Registers an event listener
     *
     * @param listener the listener to register
     */
    public void registerListeners(EventListener... listener) {
        LISTENERS.addAll(Set.of(listener));
    }

    @Override
    public void onGuildMemberJoin(@NotNull GuildMemberJoinEvent event) {
        BatGuild guild = guildService.getGuild(event.getGuild().getId());
        BatUser user = userService.getUser(event.getUser().getId());

        for (EventListener listener : LISTENERS) {
            listener.onGuildMemberJoin(guild, user, event);
        }
    }

    @Override
    public void onGuildMemberRemove(@NonNull GuildMemberRemoveEvent event) {
        BatGuild guild = guildService.getGuild(event.getGuild().getId());
        BatUser user = userService.getUser(event.getUser().getId());

        for (EventListener listener : LISTENERS) {
            listener.onGuildMemberLeave(guild, user, event);
        }
    }
}