package net.minecraft.data;

import com.google.common.hash.Hashing;
import com.google.common.hash.HashingOutputStream;
import com.google.gson.JsonElement;
import com.google.gson.stream.JsonWriter;
import com.mojang.logging.LogUtils;
import com.mojang.serialization.Codec;
import com.mojang.serialization.DynamicOps;
import com.mojang.serialization.JsonOps;
import it.unimi.dsi.fastutil.objects.Object2IntOpenHashMap;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.nio.charset.StandardCharsets;
import java.nio.file.Path;
import java.util.Comparator;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.function.Function;
import java.util.function.ToIntFunction;
import net.minecraft.Util;
import net.minecraft.core.HolderLookup.Provider;
import net.minecraft.resources.RegistryOps;
import net.minecraft.resources.ResourceLocation;
import net.minecraft.util.GsonHelper;
import org.slf4j.Logger;

public interface DataProvider {
	ToIntFunction<String> FIXED_ORDER_FIELDS = Util.make(new Object2IntOpenHashMap<>(), object2IntOpenHashMap -> {
		object2IntOpenHashMap.put("type", 0);
		object2IntOpenHashMap.put("parent", 1);
		object2IntOpenHashMap.defaultReturnValue(2);
	});
	Comparator<String> KEY_COMPARATOR = Comparator.comparingInt(FIXED_ORDER_FIELDS).thenComparing(string -> string);
	Logger LOGGER = LogUtils.getLogger();

	CompletableFuture<?> run(CachedOutput output);

	/**
	 * Gets a name for this provider, to use in logging.
	 */
	String getName();

	static <T> CompletableFuture<?> saveAll(CachedOutput output, Codec<T> codec, PackOutput.PathProvider pathProvider, Map<ResourceLocation, T> entries) {
		return saveAll(output, codec, pathProvider::json, (Map<T, T>)entries);
	}

	static <T, E> CompletableFuture<?> saveAll(CachedOutput output, Codec<E> codec, Function<T, Path> pathGetter, Map<T, E> entries) {
		return saveAll(output, object -> codec.encodeStart(JsonOps.INSTANCE, (E)object).getOrThrow(), pathGetter, entries);
	}

	static <T, E> CompletableFuture<?> saveAll(CachedOutput output, Function<E, JsonElement> serializer, Function<T, Path> pathGetter, Map<T, E> entries) {
		return CompletableFuture.allOf((CompletableFuture[])entries.entrySet().stream().map(entry -> {
			Path path = (Path)pathGetter.apply(entry.getKey());
			JsonElement jsonElement = (JsonElement)serializer.apply(entry.getValue());
			return saveStable(output, jsonElement, path);
		}).toArray(CompletableFuture[]::new));
	}

	static <T> CompletableFuture<?> saveStable(CachedOutput output, Provider registries, Codec<T> codec, T value, Path path) {
		RegistryOps<JsonElement> registryOps = registries.createSerializationContext(JsonOps.INSTANCE);
		return saveStable(output, registryOps, codec, value, path);
	}

	static <T> CompletableFuture<?> saveStable(CachedOutput output, Codec<T> codec, T value, Path path) {
		return saveStable(output, JsonOps.INSTANCE, codec, value, path);
	}

	private static <T> CompletableFuture<?> saveStable(CachedOutput output, DynamicOps<JsonElement> ops, Codec<T> codec, T value, Path path) {
		JsonElement jsonElement = codec.encodeStart(ops, value).getOrThrow();
		return saveStable(output, jsonElement, path);
	}

	static CompletableFuture<?> saveStable(CachedOutput output, JsonElement json, Path path) {
		return CompletableFuture.runAsync(() -> {
			try {
				ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
				HashingOutputStream hashingOutputStream = new HashingOutputStream(Hashing.sha1(), byteArrayOutputStream);
				JsonWriter jsonWriter = new JsonWriter(new OutputStreamWriter(hashingOutputStream, StandardCharsets.UTF_8));

				try {
					jsonWriter.setSerializeNulls(false);
					jsonWriter.setIndent("  ");
					GsonHelper.writeValue(jsonWriter, json, KEY_COMPARATOR);
				} catch (Throwable var9) {
					try {
						jsonWriter.close();
					} catch (Throwable var8) {
						var9.addSuppressed(var8);
					}

					throw var9;
				}

				jsonWriter.close();
				output.writeIfNeeded(path, byteArrayOutputStream.toByteArray(), hashingOutputStream.hash());
			} catch (IOException var10) {
				LOGGER.error("Failed to save file to {}", path, var10);
			}
		}, Util.backgroundExecutor().forName("saveStable"));
	}

	@FunctionalInterface
	public interface Factory<T extends DataProvider> {
		T create(PackOutput packOutput);
	}
}