package pl.eldzi.core.util.v1_12_R1;

import java.io.File;

import org.bukkit.Bukkit;
import org.bukkit.World;
import org.bukkit.WorldCreator;
import org.bukkit.craftbukkit.v1_12_R1.CraftServer;
import org.bukkit.craftbukkit.v1_12_R1.CraftWorld;
import org.bukkit.event.world.WorldInitEvent;
import org.bukkit.event.world.WorldLoadEvent;
import org.bukkit.generator.ChunkGenerator;

import net.minecraft.server.v1_12_R1.Convertable;
import net.minecraft.server.v1_12_R1.EntityTracker;
import net.minecraft.server.v1_12_R1.EnumDifficulty;
import net.minecraft.server.v1_12_R1.EnumGamemode;
import net.minecraft.server.v1_12_R1.IDataManager;
import net.minecraft.server.v1_12_R1.IProgressUpdate;
import net.minecraft.server.v1_12_R1.IWorldAccess;
import net.minecraft.server.v1_12_R1.MinecraftServer;
import net.minecraft.server.v1_12_R1.ServerNBTManager;
import net.minecraft.server.v1_12_R1.WorldData;
import net.minecraft.server.v1_12_R1.WorldLoaderServer;
import net.minecraft.server.v1_12_R1.WorldManager;
import net.minecraft.server.v1_12_R1.WorldServer;
import net.minecraft.server.v1_12_R1.WorldSettings;
import net.minecraft.server.v1_12_R1.WorldType;

public class WorldUtils extends pl.eldzi.core.util.WorldUtils {

    public World loadWorld(WorldCreator creator) {
        CraftServer server = (CraftServer) Bukkit.getServer();
        if (creator == null) {
            throw new IllegalArgumentException("Creator may not be null");
        }

        String name = creator.name();
        System.out.println("Loading world '" + name + "'");
        ChunkGenerator generator = creator.generator();
        File folder = new File(server.getWorldContainer(), name);
        World world = server.getWorld(name);
        WorldType type = WorldType.getType(creator.type().getName());
        boolean generateStructures = creator.generateStructures();

        if (world != null) {
            return world;
        }

        if ((folder.exists()) && (!folder.isDirectory())) {
            throw new IllegalArgumentException("File exists with the name '" + name + "' and isn't a folder");
        }

        if (generator == null) {
            generator = server.getGenerator(name);
        }
        net.minecraft.server.v1_12_R1.World w = ((CraftWorld) world).getHandle();
        MinecraftServer ms = ((CraftServer) Bukkit.getServer()).getServer();
        Convertable converter = new WorldLoaderServer(server.getWorldContainer(), ms.dataConverterManager);

        if (converter.isConvertable(name)) {
            server.getLogger().info("Converting world '" + name + "'");
            converter.convert(name, new IProgressUpdate() {

                @Override
                public void c(String arg0) {

                }

                @Override
                public void a(int i) {
                }

                @Override
                public void a(String arg0) {

                }
            });
        }

        int dimension = server.getWorlds().size() + 1;
        boolean used = false;
        do {
            for (WorldServer worldServer : server.getServer().worlds) {
                used = worldServer.dimension == dimension;
                if (used) {
                    dimension++;
                    break;
                }
            }
        } while (used);
        boolean hardcore = false;

        System.out.println("Loaded world with dimension : " + dimension);
        IDataManager sdm = new ServerNBTManager(server.getWorldContainer(), name, true, ms.dataConverterManager);
        WorldData worlddata = sdm.getWorldData();
        WorldSettings worldSettings = null;
        if (worlddata == null) {
            worldSettings = new WorldSettings(creator.seed(), EnumGamemode.SURVIVAL, generateStructures, hardcore,
                    type);
            worldSettings.setGeneratorSettings(creator.generatorSettings());
            worlddata = new WorldData(worldSettings, name);
        }
        WorldServer internal = (WorldServer) new WorldServer(ms, sdm, worlddata, dimension, ms.methodProfiler,
                creator.environment(), generator);

        boolean containsWorld = false;
        for (World otherWorld : server.getWorlds()) {
            if (otherWorld.getName().equalsIgnoreCase(name.toLowerCase())) {
                containsWorld = true;
                break;
            }
        }

        if (!containsWorld)
            return null;

        System.out.println("Created world with dimension : " + dimension);

        internal.scoreboard = server.getScoreboardManager().getMainScoreboard().getHandle();
        internal.worldMaps = server.getServer().worlds.get(0).worldMaps;
        internal.tracker = new EntityTracker(internal); // CraftBukkit
        internal.addIWorldAccess((IWorldAccess) new WorldManager(server.getServer(), internal));
        internal.worldData.setDifficulty(EnumDifficulty.HARD);
        internal.setSpawnFlags(true, true);
        internal.savingDisabled = true;
        server.getServer().worlds.add(internal);

        if (generator != null) {
            internal.getWorld().getPopulators().addAll(generator.getDefaultPopulators(internal.getWorld()));
        }

        server.getPluginManager().callEvent(new WorldInitEvent(internal.getWorld()));
        server.getPluginManager().callEvent(new WorldLoadEvent(internal.getWorld()));

        return internal.getWorld();
    }
}