/*
 * Copyright (c) 2018 Jitse Boonstra
 */

package net.jitse.npclib;

import net.jitse.npclib.api.NPC;
import net.jitse.npclib.listeners.ChunkListener;
import net.jitse.npclib.listeners.PacketListener;
import net.jitse.npclib.listeners.PlayerListener;
import net.jitse.npclib.logging.NPCLibLogger;
import net.jitse.npclib.skin.Skin;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;

import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * @author Jitse Boonstra
 */
public class NPCLib {

    private final JavaPlugin plugin;
    private final Class<?> npcClass;

    private Logger logger;

    public NPCLib(JavaPlugin plugin) {
        this.plugin = plugin;
        this.logger = new NPCLibLogger(plugin);

        // TODO: Change this variable to a dynamic variable (maven file filtering?).
        // logger.info("Initiating NPCLib v1.4");

        String versionName = plugin.getServer().getClass().getPackage().getName().split("\\.")[3];

        Class<?> npcClass = null;

        try {
            npcClass = Class.forName("net.jitse.npclib.nms." + versionName + ".NPC_" + versionName);
        } catch (ClassNotFoundException exception) {
            // Version not supported, error below.
        }

        this.npcClass = npcClass;

        if (npcClass == null) {
            logger.log(Level.SEVERE, "Failed to initiate. Your server's version ("
                    + versionName + ") is not supported");
            return;
        }

        logger.info("Enabled for MC " + versionName);

        registerInternal();
    }

    private void registerInternal() {
        PluginManager pluginManager = plugin.getServer().getPluginManager();

        pluginManager.registerEvents(new PlayerListener(), plugin);
        pluginManager.registerEvents(new ChunkListener(), plugin);

        // Boot the according packet listener.
        new PacketListener().start(plugin);
    }

    /**
     * Create a new non-player character (NPC).
     *
     * @param skin             The skin you want the NPC to have.
     * @param autoHideDistance Distance from where you want to NPC to hide from the player (50 recommended).
     * @param lines            The text you want to sendShowPackets above the NPC (null = no text).
     * @return The NPC object you may use to sendShowPackets it to players.
     */
    public NPC createNPC(Skin skin, double autoHideDistance, List<String> lines) {
        try {
            return (NPC) npcClass.getConstructors()[0].newInstance(plugin, skin, autoHideDistance, lines);
        } catch (Exception exception) {
            logger.log(Level.SEVERE, "Failed to create NPC. Please report the following stacktrace", exception);
        }

        return null;
    }

    /**
     * Create a new non-player character (NPC).
     *
     * @param skin  The skin you want the NPC to have.
     * @param lines The text you want to sendShowPackets above the NPC (null = no text).
     * @return The NPC object you may use to sendShowPackets it to players.
     */
    public NPC createNPC(Skin skin, List<String> lines) {
        return createNPC(skin, 50, lines);
    }


    /**
     * Create a new non-player character (NPC).
     *
     * @param skin The skin you want the NPC to have.
     * @return The NPC object you may use to sendShowPackets it to players.
     */
    public NPC createNPC(Skin skin) {
        return createNPC(skin, 50, null);
    }


    /**
     * Create a new non-player character (NPC).
     *
     * @return The NPC object you may use to sendShowPackets it to players.
     */
    public NPC createNPC() {
        return createNPC(null, 50, null);
    }

}