package ru.bclib.api;

import net.minecraft.core.Registry;
import net.minecraft.resources.ResourceKey;
import net.minecraft.server.MinecraftServer;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.server.level.progress.ChunkProgressListener;
import net.minecraft.world.level.CustomSpawner;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.biome.Biome;
import net.minecraft.world.level.chunk.ChunkGenerator;
import net.minecraft.world.level.dimension.DimensionType;
import net.minecraft.world.level.storage.LevelStorageSource;
import net.minecraft.world.level.storage.ServerLevelData;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Executor;

/**
 * provides some lifetime hooks for a Minecraft instance
 */
public class LifeCycleAPI {
	private final static List<LevelLoadBiomesCall> onLoadLevelBiomes = new ArrayList<>(2);
	private final static List<LevelLoadCall> onLoadLevel = new ArrayList<>(2);
	private final static List<BeforeLevelLoadCall> beforeLoadLevel = new ArrayList<>(2);
	/**
	 * A callback function that is used for each new ServerLevel instance
	 */
	public interface BeforeLevelLoadCall {
		void beforeLoad();
	}
	
	/**
	 * A callback function that is used for each new ServerLevel instance
	 */
	public interface LevelLoadBiomesCall {
		void onLoad(ServerLevel world, long seed, Registry<Biome> registry);
	}
	
	/**
	 * A callback function that is used for each new ServerLevel instance
	 */
	public interface LevelLoadCall {
		void onLoad(
			ServerLevel world,
			MinecraftServer minecraftServer,
			Executor executor,
			LevelStorageSource.LevelStorageAccess levelStorageAccess,
			ServerLevelData serverLevelData,
			ResourceKey<Level> resourceKey,
			DimensionType dimensionType,
			ChunkProgressListener chunkProgressListener,
			ChunkGenerator chunkGenerator,
			boolean bl,
			long l,
			List<CustomSpawner> list,
			boolean bl2);
	}
	
	/**
	 * Register a callback that is called before a level is loaded or created,
	 * but after the {@link WorldDataAPI} was initialized and patches from
	 * the {@link ru.bclib.api.datafixer.DataFixerAPI} were applied.
	 *
	 * @param call The callback Method
	 */
	public static void beforeLevelLoad(BeforeLevelLoadCall call){
		beforeLoadLevel.add(call);
	}
	
	/**
	 * Register a callback that is called when a new {@code ServerLevel is instantiated}.
	 * This callback will receive the world seed as well as it's biome registry.
	 * @param call The calbback Method
	 */
	public static void onLevelLoad(LevelLoadBiomesCall call){
		onLoadLevelBiomes.add(call);
	}
	
	/**
	 * Register a callback that is called when a new {@code ServerLevel is instantiated}.
	 * This callbacl will receiv all parameters that were passed to the ServerLevel's constructor
	 * @param call The calbback Method
	 */
	public static void onLevelLoad(LevelLoadCall call){
		onLoadLevel.add(call);
	}
	
	/**
	 * For internal use, You should not call this method!	 
	 */
	public static void _runBeforeLevelLoad(){
		beforeLoadLevel.forEach(c -> c.beforeLoad());
	}
	/**
	 * For internal use, You should not call this method!
	 * @param minecraftServer
	 * @param executor
	 * @param levelStorageAccess
	 * @param serverLevelData
	 * @param resourceKey
	 * @param dimensionType
	 * @param chunkProgressListener
	 * @param chunkGenerator
	 * @param bl
	 * @param l
	 * @param list
	 * @param bl2
	 */
	public static void _runLevelLoad(ServerLevel world,
									 MinecraftServer minecraftServer,
									 Executor executor,
									 LevelStorageSource.LevelStorageAccess levelStorageAccess,
									 ServerLevelData serverLevelData,
									 ResourceKey<Level> resourceKey,
									 DimensionType dimensionType,
									 ChunkProgressListener chunkProgressListener,
									 ChunkGenerator chunkGenerator,
									 boolean bl,
									 long l,
									 List<CustomSpawner> list,
									 boolean bl2){
		onLoadLevel.forEach(c -> c.onLoad(
			world,
			minecraftServer,
			executor,
			levelStorageAccess,
			serverLevelData,
			resourceKey,
			dimensionType,
			chunkProgressListener,
			chunkGenerator,
			bl,
			l,
			list,
			bl2)
		);
		
		final long seed = world.getSeed();
		final Registry<Biome> biomeRegistry = world.registryAccess().registryOrThrow(Registry.BIOME_REGISTRY);
		onLoadLevelBiomes.forEach(c -> c.onLoad(world, seed, biomeRegistry));
	}
}