package net.minecraft.commands.arguments;

import com.google.gson.JsonObject;
import com.mojang.brigadier.StringReader;
import com.mojang.brigadier.arguments.ArgumentType;
import com.mojang.brigadier.context.CommandContext;
import com.mojang.brigadier.exceptions.CommandSyntaxException;
import com.mojang.brigadier.exceptions.Dynamic2CommandExceptionType;
import com.mojang.brigadier.exceptions.Dynamic3CommandExceptionType;
import com.mojang.brigadier.suggestion.Suggestions;
import com.mojang.brigadier.suggestion.SuggestionsBuilder;
import com.mojang.datafixers.util.Either;
import java.util.Arrays;
import java.util.Collection;
import java.util.Objects;
import java.util.Optional;
import java.util.concurrent.CompletableFuture;
import java.util.function.Predicate;
import net.minecraft.commands.CommandBuildContext;
import net.minecraft.commands.CommandSourceStack;
import net.minecraft.commands.SharedSuggestionProvider;
import net.minecraft.commands.synchronization.ArgumentTypeInfo;
import net.minecraft.core.Holder;
import net.minecraft.core.HolderLookup;
import net.minecraft.core.HolderSet;
import net.minecraft.core.Registry;
import net.minecraft.network.FriendlyByteBuf;
import net.minecraft.network.chat.Component;
import net.minecraft.resources.Identifier;
import net.minecraft.resources.ResourceKey;
import net.minecraft.tags.TagKey;

public class ResourceOrTagArgument<T> implements ArgumentType<ResourceOrTagArgument.Result<T>> {
	private static final Collection<String> EXAMPLES = Arrays.asList("foo", "foo:bar", "012", "#skeletons", "#minecraft:skeletons");
	private static final Dynamic2CommandExceptionType ERROR_UNKNOWN_TAG = new Dynamic2CommandExceptionType(
		(id, registry) -> Component.translatableEscape("argument.resource_tag.not_found", id, registry)
	);
	private static final Dynamic3CommandExceptionType ERROR_INVALID_TAG_TYPE = new Dynamic3CommandExceptionType(
		(id, actualRegistry, expectedRegistry) -> Component.translatableEscape("argument.resource_tag.invalid_type", id, actualRegistry, expectedRegistry)
	);
	private final HolderLookup<T> registryLookup;
	private final ResourceKey<? extends Registry<T>> registryKey;

	public ResourceOrTagArgument(final CommandBuildContext context, final ResourceKey<? extends Registry<T>> registryKey) {
		this.registryKey = registryKey;
		this.registryLookup = context.lookupOrThrow(registryKey);
	}

	public static <T> ResourceOrTagArgument<T> resourceOrTag(final CommandBuildContext context, final ResourceKey<? extends Registry<T>> key) {
		return new ResourceOrTagArgument<>(context, key);
	}

	public static <T> ResourceOrTagArgument.Result<T> getResourceOrTag(
		final CommandContext<CommandSourceStack> context, final String name, final ResourceKey<Registry<T>> registryKey
	) throws CommandSyntaxException {
		ResourceOrTagArgument.Result<?> argument = context.getArgument(name, ResourceOrTagArgument.Result.class);
		Optional<ResourceOrTagArgument.Result<T>> value = argument.cast(registryKey);
		return (ResourceOrTagArgument.Result<T>)value.orElseThrow(() -> argument.unwrap().map(element -> {
			ResourceKey<?> elementKey = element.key();
			return ResourceArgument.ERROR_INVALID_RESOURCE_TYPE.create(elementKey.identifier(), elementKey.registry(), registryKey.identifier());
		}, tag -> {
			TagKey<?> tagKey = tag.key();
			return ERROR_INVALID_TAG_TYPE.create(tagKey.location(), tagKey.registry(), registryKey.identifier());
		}));
	}

	public ResourceOrTagArgument.Result<T> parse(final StringReader reader) throws CommandSyntaxException {
		if (reader.canRead() && reader.peek() == '#') {
			int cursor = reader.getCursor();

			try {
				reader.skip();
				Identifier tagId = Identifier.read(reader);
				TagKey<T> tagKey = TagKey.create(this.registryKey, tagId);
				HolderSet.Named<T> holderSet = (HolderSet.Named<T>)this.registryLookup
					.get(tagKey)
					.orElseThrow(() -> ERROR_UNKNOWN_TAG.createWithContext(reader, tagId, this.registryKey.identifier()));
				return new ResourceOrTagArgument.TagResult<>(holderSet);
			} catch (CommandSyntaxException var6) {
				reader.setCursor(cursor);
				throw var6;
			}
		} else {
			Identifier resourceId = Identifier.read(reader);
			ResourceKey<T> resourceKey = ResourceKey.create(this.registryKey, resourceId);
			Holder.Reference<T> holder = (Holder.Reference<T>)this.registryLookup
				.get(resourceKey)
				.orElseThrow(() -> ResourceArgument.ERROR_UNKNOWN_RESOURCE.createWithContext(reader, resourceId, this.registryKey.identifier()));
			return new ResourceOrTagArgument.ResourceResult<>(holder);
		}
	}

	@Override
	public <S> CompletableFuture<Suggestions> listSuggestions(final CommandContext<S> context, final SuggestionsBuilder builder) {
		return SharedSuggestionProvider.listSuggestions(context, builder, this.registryKey, SharedSuggestionProvider.ElementSuggestionType.ALL);
	}

	@Override
	public Collection<String> getExamples() {
		return EXAMPLES;
	}

	public static class Info<T> implements ArgumentTypeInfo<ResourceOrTagArgument<T>, ResourceOrTagArgument.Info<T>.Template> {
		public void serializeToNetwork(final ResourceOrTagArgument.Info<T>.Template template, final FriendlyByteBuf out) {
			out.writeResourceKey(template.registryKey);
		}

		public ResourceOrTagArgument.Info<T>.Template deserializeFromNetwork(final FriendlyByteBuf in) {
			return new ResourceOrTagArgument.Info.Template(in.readRegistryKey());
		}

		public void serializeToJson(final ResourceOrTagArgument.Info<T>.Template template, final JsonObject out) {
			out.addProperty("registry", template.registryKey.identifier().toString());
		}

		public ResourceOrTagArgument.Info<T>.Template unpack(final ResourceOrTagArgument<T> argument) {
			return new ResourceOrTagArgument.Info.Template(argument.registryKey);
		}

		public final class Template implements ArgumentTypeInfo.Template<ResourceOrTagArgument<T>> {
			private final ResourceKey<? extends Registry<T>> registryKey;

			private Template(final ResourceKey<? extends Registry<T>> registryKey) {
				Objects.requireNonNull(Info.this);
				super();
				this.registryKey = registryKey;
			}

			public ResourceOrTagArgument<T> instantiate(final CommandBuildContext context) {
				return new ResourceOrTagArgument<>(context, this.registryKey);
			}

			@Override
			public ArgumentTypeInfo<ResourceOrTagArgument<T>, ?> type() {
				return Info.this;
			}
		}
	}

	private record ResourceResult<T>(Holder.Reference<T> value) implements ResourceOrTagArgument.Result<T> {
		@Override
		public Either<Holder.Reference<T>, HolderSet.Named<T>> unwrap() {
			return Either.left(this.value);
		}

		@Override
		public <E> Optional<ResourceOrTagArgument.Result<E>> cast(final ResourceKey<? extends Registry<E>> registryKey) {
			return this.value.key().isFor(registryKey) ? Optional.of(this) : Optional.empty();
		}

		public boolean test(final Holder<T> holder) {
			return holder.equals(this.value);
		}

		@Override
		public String asPrintable() {
			return this.value.key().identifier().toString();
		}
	}

	public interface Result<T> extends Predicate<Holder<T>> {
		Either<Holder.Reference<T>, HolderSet.Named<T>> unwrap();

		<E> Optional<ResourceOrTagArgument.Result<E>> cast(final ResourceKey<? extends Registry<E>> registryKey);

		String asPrintable();
	}

	private record TagResult<T>(HolderSet.Named<T> tag) implements ResourceOrTagArgument.Result<T> {
		@Override
		public Either<Holder.Reference<T>, HolderSet.Named<T>> unwrap() {
			return Either.right(this.tag);
		}

		@Override
		public <E> Optional<ResourceOrTagArgument.Result<E>> cast(final ResourceKey<? extends Registry<E>> registryKey) {
			return this.tag.key().isFor(registryKey) ? Optional.of(this) : Optional.empty();
		}

		public boolean test(final Holder<T> holder) {
			return this.tag.contains(holder);
		}

		@Override
		public String asPrintable() {
			return "#" + this.tag.key().location();
		}
	}
}