package moe.oko.Kiafumi.listener;

import moe.oko.Kiafumi.Kiafumi;
import moe.oko.Kiafumi.util.EmbedUI;
import net.dv8tion.jda.api.EmbedBuilder;
import net.dv8tion.jda.api.entities.Activity;
import net.dv8tion.jda.api.entities.Guild;
import net.dv8tion.jda.api.events.ReadyEvent;
import net.dv8tion.jda.api.events.guild.GuildJoinEvent;
import net.dv8tion.jda.api.events.guild.member.GuildMemberJoinEvent;
import net.dv8tion.jda.api.events.guild.member.GuildMemberRemoveEvent;
import net.dv8tion.jda.api.events.message.MessageReceivedEvent;
import net.dv8tion.jda.api.events.user.update.GenericUserPresenceEvent;
import net.dv8tion.jda.api.hooks.ListenerAdapter;
import org.jetbrains.annotations.NotNull;

import java.time.OffsetDateTime;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Timer;
import java.util.TimerTask;

import static moe.oko.Kiafumi.Kiafumi.info;

/**
 * Main Listener
 * Used for all utility garbage like guild handling and persistence. (Also LOL prevention).
 * @author Kay, oko, Tiddy
 */
public class MainListener extends ListenerAdapter {

    /**
     * GuildJoin event listener, that ensures that a discord has a profile created for it.
     * @param event - event to be handled...
     */
    @Override
    public void onGuildJoin(@NotNull GuildJoinEvent event) {
        // Automatically create our default information for the server if we don't have it already.
        info("Joined a new guild, NAME: " + event.getGuild().getName() + " ID: " + event.getGuild().getId());
        Kiafumi.instance.getServerManager().createNewDefaultServer(event.getGuild());
        Kiafumi.instance.registerForGuild(event.getGuild());
    }

    /**
     * Shoots a message into console when the bot is defined as "Ready" by Discord.
     */
    @Override
    public void onReady(@NotNull ReadyEvent event) {
        var n = System.lineSeparator();
        info("Received READY signal from Discord, bot is now logged in." +n+
                "--------------------------------" +n+
                "Active Guilds: " + event.getGuildAvailableCount() +n+
                "Guilds Unavailable: " + event.getGuildUnavailableCount() +n+
                "--------------------------------");
    }

    /**
     * Quick Response for if someone pings me.
     */
    public void onMessageReceived(MessageReceivedEvent event) {
        if(event.getMessage().getMentionedUsers().contains(Kiafumi.JDA.getSelfUser())) {
            var eb = new EmbedBuilder()
                    .setColor(EmbedUI.INFO)
                    .setTitle("Hi, i'm Kiafumi!")
                    .setDescription("I was summoned on October 6th 2017! My goal is to explore the metaverse and help people in it!")
                    .setThumbnail(Kiafumi.JDA.getSelfUser().getAvatarUrl())
                    .setTimestamp(ZonedDateTime.now())
                    .setFooter(EmbedUI.BRAND);
            event.getChannel().sendMessageEmbeds(eb.build()).queue();
        }
    }

    /**
     * Game Prevention, is a global mechanic :^)
     * @param event - GenericUserPresenceEvent event to be used.
     */
    @Deprecated
    @Override
    public void onGenericUserPresence(@NotNull GenericUserPresenceEvent event) {
        if(Kiafumi.instance.config.isGamePreventionEnabled()) {
            // Proceed.
            if(event.getMember().getActivities().contains(Activity.playing(Kiafumi.instance.config.getGameToPrevent()))) {
                // THEY ARE PLAYING THE BIG BAD GAME!!!! WARN THE MIMMEDIATELYOYUITHTHHT
                event.getMember().getUser().openPrivateChannel().complete().sendMessage("**YOU ARE PLAYING THE BIG BAD GAME STOP STOP STOP** " +
                        "(in " + Kiafumi.instance.config.getGameCheckTime() + " minutes i wll EVAPORATE you from every server i am IN.").queue();
                var timer = new Timer();
                int timeInMilisToKill = (Kiafumi.instance.config.getGameCheckTime() * 60) * 1000;
                timer.schedule(new TimerTask() {
                    @Override
                    public void run() {
                        if(event.getMember().getActivities().contains(Activity.playing(Kiafumi.instance.config.getGameToPrevent()))) {
                            event.getMember().getUser().openPrivateChannel().complete().sendMessage("**I warned you, NOW SUFFER MY RAGE**").queue();
                            for(Guild guild : event.getJDA().getGuilds()) {
                                if(guild.isMember(event.getMember().getUser())) {
                                    guild.ban(guild.getMember(event.getMember().getUser()), 0, "PLAYED A HORRIBLE GAME").queue();
                                }
                            }
                        } else {
                            event.getMember().getUser().openPrivateChannel().complete().sendMessage("Thank you for not playing that shitty game anymore.").queue();
                        }
                    }
                }, timeInMilisToKill);
            }
        }
    }

    @Override
    public void onGuildMemberJoin(@NotNull GuildMemberJoinEvent event) {
        var server = Kiafumi.instance.getServerManager().getOrCreateServer(event.getGuild());
        if(server.getJoinRole() != null) {
            try {
                event.getGuild().addRoleToMember(event.getMember(), event.getGuild().getRoleById(server.getJoinRole())).queue();
            } catch(Exception ex) {
                event.getGuild().getTextChannels().get(0).sendMessage("**Failed to apply welcome role to " + event.getMember().getEffectiveName() + ", as the role does not exist.**").queue();
            }
        }
        if(server.isWelcomeEnabled()) {
            var textChannel = event.getGuild().getTextChannelById(server.getWelcomeChannel());
            if(textChannel == null) {
                event.getGuild().getTextChannels().get(0).sendMessage("**Failed to send welcome message, as the welcome channel does not exist.**").queue();
                return;
            }
            var dTF = DateTimeFormatter.ofPattern("MM-dd-yyyy");
            // Prepare embed.
            var embedBuilder = new EmbedBuilder()
                    .setColor(EmbedUI.SUCCESS)
                    .setAuthor(event.getMember().getEffectiveName() + "#" + event.getMember().getUser().getDiscriminator() + " ("
                    + event.getMember().getId() + ")", null, event.getUser().getAvatarUrl()).setFooter("User Joined").setTimestamp(OffsetDateTime.now())
                    .setDescription(event.getMember().getAsMention() + " | **Joined Discord**: " + event.getMember().getTimeCreated().format(dTF));
            textChannel.sendMessageEmbeds(embedBuilder.build()).queue();
        }
    }

    @Override
    public void onGuildMemberRemove(@NotNull GuildMemberRemoveEvent event) {
        var server = Kiafumi.instance.getServerManager().getOrCreateServer(event.getGuild());
        if(server.isWelcomeEnabled()) {
            var textChannel = event.getGuild().getTextChannelById(server.getWelcomeChannel());
            if(textChannel == null) {
                event.getGuild().getTextChannels().get(0).sendMessage("**Failed to send leave message, as the welcome channel does not exist.**").queue();
                return;
            }
            // Prepare embed.
            var dTF = DateTimeFormatter.ofPattern("MM-dd-yyyy");
            var embedBuilder = new EmbedBuilder()
                    .setColor(EmbedUI.FAILURE)
                    .setAuthor(event.getMember().getEffectiveName() + "#" + event.getMember().getUser().getDiscriminator() + " ("
                            + event.getMember().getId() + ")", null, event.getUser().getAvatarUrl()).setFooter("User Left").setTimestamp(OffsetDateTime.now())
                    .setDescription(event.getMember().getAsMention() + " | **Joined Server**: " + event.getMember().getTimeJoined().format(dTF));
            textChannel.sendMessageEmbeds(embedBuilder.build()).queue();
        }
    }
}