package cc.fascinated.bat.service;

import cc.fascinated.bat.model.BatGuild;
import cc.fascinated.bat.repository.GuildRepository;
import lombok.Getter;
import lombok.NonNull;
import lombok.extern.log4j.Log4j2;
import net.dv8tion.jda.api.entities.Guild;
import net.dv8tion.jda.api.events.guild.GuildJoinEvent;
import net.dv8tion.jda.api.hooks.ListenerAdapter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.DependsOn;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

import java.util.*;

/**
 * @author Fascinated (fascinated7)
 */
@Service @Log4j2 @Getter
@DependsOn("discordService")
public class GuildService extends ListenerAdapter {
    /**
     * The cached guilds
     */
    private final Map<String, BatGuild> guilds = new HashMap<>();

    /**
     * The guild repository to use
     */
    private final GuildRepository guildRepository;

    @Autowired
    public GuildService(@NonNull GuildRepository guildRepository) {
        this.guildRepository = guildRepository;
        DiscordService.JDA.addEventListener(this);
    }

    @Scheduled(cron = "0 0 0 * * *")
    private void validatePremiumStatus() {
        for (BatGuild guild : guilds.values()) {
            BatGuild.Premium premium = guild.getPremium();
            if (premium.getExpiresAt() != null && premium.getExpiresAt().before(new Date())) {
                premium.removePremium();
                guildRepository.save(guild);
                log.info("Removed premium status from guild \"{}\"", guild.getId());
            }
        }
    }

    /**
     * Gets a guild by its ID
     *
     * @param id The ID of the guild
     * @return The guild
     */
    public BatGuild getGuild(@NonNull String id) {
        if (guilds.containsKey(id)) {
            return guilds.get(id);
        }
        if (DiscordService.JDA.getGuildById(id) == null) {
            return null;
        }
        long start = System.currentTimeMillis();
        Optional<BatGuild> optionalGuild = guildRepository.findById(id);

        if (optionalGuild.isPresent()) {
            BatGuild guild = optionalGuild.get();
            guilds.put(id, guild);
            return guild;
        }
        BatGuild guild = guildRepository.save(new BatGuild(id));
        log.info("Created guild \"{}\" in {}ms", id, System.currentTimeMillis() - start);
        return guild;
    }

    /**
     * Saves a guild
     *
     * @param guild The guild to save
     */
    public void saveGuild(@NonNull BatGuild guild) {
        guildRepository.save(guild);
    }

    /**
     * Gets all guilds
     *
     * @return all guilds
     */
    public List<BatGuild> getAllGuilds() {
        List<BatGuild> guilds = new ArrayList<>();
        for (Guild guild : DiscordService.JDA.getGuilds()) {
            guilds.add(getGuild(guild.getId()));
        }
        return guilds;
    }

    @Override
    public final void onGuildJoin(GuildJoinEvent event) {
        Guild guild = event.getGuild();
        log.info("Joined guild \"{}\"", guild.getId());
        getGuild(guild.getId()); // Ensure the guild is in the database
    }
}