package cc.fascinated.bat.reminder;

import cc.fascinated.bat.common.feature.Feature;
import cc.fascinated.bat.common.feature.FeatureProfile;
import cc.fascinated.bat.reminder.command.ReminderCommand;
import cc.fascinated.bat.common.model.BatGuild;
import cc.fascinated.bat.service.OldCommandService;
import cc.fascinated.bat.service.DiscordService;
import cc.fascinated.bat.service.GuildService;
import lombok.NonNull;
import lombok.extern.log4j.Log4j2;
import net.dv8tion.jda.api.entities.Guild;
import net.dv8tion.jda.api.entities.User;
import net.dv8tion.jda.api.entities.channel.concrete.TextChannel;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.DependsOn;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * @author Fascinated (fascinated7)
 */
@Component
@Log4j2(topic = "Reminder Feature")
@DependsOn("discordService")
public class ReminderFeature extends Feature {
    public static final int MAX_REMINDERS = 5; // 5 reminders
    public static final long MAX_REMINDER_LENGTH = TimeUnit.DAYS.toMillis(30); // 1 month

    private final GuildService guildService;

    @Autowired
    public ReminderFeature(@NonNull ApplicationContext context, @NonNull OldCommandService commandService, @NonNull GuildService guildService) {
        super("Reminder", FeatureProfile.FeatureState.DISABLED, true);
        this.guildService = guildService;

        super.registerCommand(commandService, context.getBean(ReminderCommand.class));
    }

    @Scheduled(cron = "*/30 * * * * *")
    public void checkReminders() {
        for (Guild guild : DiscordService.JDA.getGuilds()) {
            BatGuild batGuild = guildService.getGuild(guild.getId());
            if (batGuild == null) {
                continue;
            }

            ReminderProfile reminderProfile = batGuild.getProfile(ReminderProfile.class);
            if (reminderProfile == null) {
                continue;
            }

            for (Map.Entry<User, List<Reminder>> entry : reminderProfile.getReminders().entrySet()) {
                User user = entry.getKey();
                List<Reminder> toRemove = new ArrayList<>();
                List<Reminder> reminders = entry.getValue();
                for (Reminder reminder : reminders) {
                    if (!reminder.isExpired()) {
                        continue;
                    }

                    toRemove.add(reminder);
                    TextChannel channel = reminder.getChannel();
                    if (channel != null) {
                        channel.sendMessage("Hey %s! ⏰ It's time for your reminder: `%s`".formatted(
                                user.getAsMention(),
                                reminder.getReminder()
                        )).queue();
                    }
                }
                toRemove.forEach(reminder -> reminderProfile.removeReminder(user, reminder));
            }
        }
    }
}