package moe.oko.Kiafumi;

import moe.oko.Kiafumi.command.PingCommand;
import moe.oko.Kiafumi.listener.MainListener;
import moe.oko.Kiafumi.model.KiafumiDB;
import moe.oko.Kiafumi.model.ServerManager;
import net.dv8tion.jda.api.EmbedBuilder;
import net.dv8tion.jda.api.JDA;
import net.dv8tion.jda.api.JDABuilder;
import net.dv8tion.jda.api.OnlineStatus;
import net.dv8tion.jda.api.entities.Activity;
import net.dv8tion.jda.api.entities.Guild;
import net.dv8tion.jda.api.requests.GatewayIntent;
import net.dv8tion.jda.api.utils.ChunkingFilter;
import net.dv8tion.jda.api.utils.MemberCachePolicy;
import org.simpleyaml.configuration.file.YamlConfiguration;
import org.simpleyaml.exceptions.InvalidConfigurationException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.awt.*;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.time.temporal.TemporalAccessor;

/**
 * Kiafumi Main Class
 */
public class Kiafumi {

    private File CONFIG_FILE = new File("config.yml");

    public YamlConfiguration yamlConfiguration = new YamlConfiguration();

    public Logger logger = LoggerFactory.getLogger("Kiafumi");

    public static String PREFIX;

    public static Kiafumi instance;

    public static JDA JDA;

    public KiafumiConfig config;

    public KiafumiDB database;

    public ServerManager serverManager;

    /**
     * Main Class function, makes the classes work or some shit.
     * @param args - Arguments for program start.
     */
    public static void main(String[] args) {
        try {
            Kiafumi kia = new Kiafumi();
            kia.start();
        } catch (Exception ex) {
            System.out.println("Failed to start Kiafumi Instance, check your Java installation.");
            ex.printStackTrace();
        }
    }

    /**
     * Ran on program start. Anything in here can determine whether the program will start.
     */
    public void start() {
        instance = this;

        logger.info("Starting Kiafumi.");
        //Logger check
        System.out.println("If no other messages are present, logger failed to instantiate.");

        logger.info("Config load start...");

        //Ensuring the configuration file is generated and/or exists.
        if (!CONFIG_FILE.exists()) {
            try (InputStream is = this.getClass().getClassLoader().getResourceAsStream("config.yml")) {
                //Save the default cfg
                Files.copy(is, CONFIG_FILE.toPath());
            } catch (Exception ex) {
                logger.warn("Failed to create the configuration file. Stopping. (" + CONFIG_FILE.getAbsolutePath() + ")");
                ex.printStackTrace();
                return;
            }
        }

        //Try to load configuration into our local friendly configuration API.
        try {
            yamlConfiguration.load("config.yml");
        } catch (FileNotFoundException e) {
            e.printStackTrace();
            logger.warn("File not found, must've failed to create...");
        } catch (Exception e) {
            logger.warn("Ensure all values are inputted properly.");
            e.printStackTrace();
        }

        //Initializes our configuration helper & ensures it loads properly.
        config = new KiafumiConfig(yamlConfiguration);
        if(config.load()) {
            logger.info("Config loaded, proceeding.");
        } else {
            logger.error("Failed to load configuration. Stopping process.");
            Runtime.getRuntime().exit(0);
        }

        //Registers the stop() function if the program is stopped.
        logger.info("Registering shutdown hook.");
        Runtime.getRuntime().addShutdownHook(new Thread(this::stop));

        //We have the prefix as a static thing that can be referenced anywhere, this is for simplicity.
        PREFIX = config.getPrefix();

        //Initializes database and loads credentials.
        database = config.createDb();

        serverManager = new ServerManager();

        //Makes our JDA instance.
        startDiscord();
    }

    /**
     * Ran on program shutdown.
     */
    public void stop() {

    }

    /**
     * Starts a JDA Instance.
     */
    public void startDiscord() {
        try {
            JDA = JDABuilder.create(config.getToken(), GatewayIntent.GUILD_MEMBERS,
                            GatewayIntent.GUILD_MESSAGES,
                            GatewayIntent.DIRECT_MESSAGES, GatewayIntent.GUILD_PRESENCES)
                    .setChunkingFilter(ChunkingFilter.ALL)
                    .setMemberCachePolicy(MemberCachePolicy.ALL)
                    .setActivity(Activity.of(Activity.ActivityType.valueOf(config.getActivityType()), config.getActivityMsg()))
                    .setStatus(OnlineStatus.valueOf(config.getStatusType()))
                    .addEventListeners(new MainListener()).build().awaitReady();
        } catch(Exception ex) {
            error("Initialization broke...");
            ex.printStackTrace();
            return;
        }
        PingCommand pc = new PingCommand();
        JDA.addEventListener(pc);
        for(Guild guild : JDA.getGuilds()) {
            for (String name : pc.getSlashCommandInfo().keySet()) {
                JDA.upsertCommand(name, pc.getSlashCommandInfo().get(name)).complete();
                info("Upsert command " + name + " on guild: " + guild.getId());
            }
        }

        EmbedBuilder eb = new EmbedBuilder().setTitle("Kiafumi Online")
                .setFooter("Created by Oko, Laika, and Tiddy").setColor(new Color(0x6271c1));
        JDA.getTextChannelById(config.getLogChannel()).sendMessageEmbeds(eb.build()).queue();
    }

    /*
    Static logger info reference.
     */
    public static void info(String str) {
        instance.logger.info(str);
    }

    /*
    Static Logger Error reference.
     */
    public static void error(String str) {
        instance.logger.error(str);
    }

    //Gets the active database.
    public KiafumiDB getDatabase() { return database; }

    //Gets active ServerManager
    public ServerManager getServerManager() { return serverManager; }
}