package net.minecraft.commands.arguments;

import com.google.common.annotations.VisibleForTesting;
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.DynamicCommandExceptionType;
import com.mojang.brigadier.exceptions.SimpleCommandExceptionType;
import com.mojang.serialization.Codec;
import com.mojang.serialization.Dynamic;
import com.mojang.serialization.DynamicOps;
import java.util.Collection;
import java.util.List;
import net.minecraft.commands.CommandBuildContext;
import net.minecraft.commands.CommandSourceStack;
import net.minecraft.core.Holder;
import net.minecraft.core.HolderLookup;
import net.minecraft.core.Registry;
import net.minecraft.core.registries.Registries;
import net.minecraft.nbt.NbtOps;
import net.minecraft.nbt.TagParser;
import net.minecraft.network.chat.Component;
import net.minecraft.resources.RegistryOps;
import net.minecraft.resources.ResourceKey;
import net.minecraft.resources.ResourceLocation;
import net.minecraft.world.level.storage.loot.LootTable;
import net.minecraft.world.level.storage.loot.functions.LootItemFunction;
import net.minecraft.world.level.storage.loot.functions.LootItemFunctions;
import net.minecraft.world.level.storage.loot.predicates.LootItemCondition;
import org.jetbrains.annotations.Nullable;

public class ResourceOrIdArgument<T> implements ArgumentType<Holder<T>> {
	private static final Collection<String> EXAMPLES = List.of("foo", "foo:bar", "012", "{}", "true");
	public static final DynamicCommandExceptionType ERROR_FAILED_TO_PARSE = new DynamicCommandExceptionType(
		object -> Component.translatableEscape("argument.resource_or_id.failed_to_parse", object)
	);
	private static final SimpleCommandExceptionType ERROR_INVALID = new SimpleCommandExceptionType(Component.translatable("argument.resource_or_id.invalid"));
	private static final TagParser<?> VALUE_PARSER = TagParser.create(NbtOps.INSTANCE);
	private final HolderLookup.Provider registryLookup;
	private final boolean hasRegistry;
	private final Codec<Holder<T>> codec;

	protected ResourceOrIdArgument(CommandBuildContext registryLookup, ResourceKey<Registry<T>> registryKey, Codec<Holder<T>> codec) {
		this.registryLookup = registryLookup;
		this.hasRegistry = registryLookup.lookup(registryKey).isPresent();
		this.codec = codec;
	}

	public static ResourceOrIdArgument.LootTableArgument lootTable(CommandBuildContext context) {
		return new ResourceOrIdArgument.LootTableArgument(context);
	}

	public static Holder<LootTable> getLootTable(CommandContext<CommandSourceStack> context, String name) throws CommandSyntaxException {
		return getResource(context, name);
	}

	public static ResourceOrIdArgument.LootModifierArgument lootModifier(CommandBuildContext context) {
		return new ResourceOrIdArgument.LootModifierArgument(context);
	}

	public static Holder<LootItemFunction> getLootModifier(CommandContext<CommandSourceStack> context, String name) {
		return getResource(context, name);
	}

	public static ResourceOrIdArgument.LootPredicateArgument lootPredicate(CommandBuildContext context) {
		return new ResourceOrIdArgument.LootPredicateArgument(context);
	}

	public static Holder<LootItemCondition> getLootPredicate(CommandContext<CommandSourceStack> context, String name) {
		return getResource(context, name);
	}

	private static <T> Holder<T> getResource(CommandContext<CommandSourceStack> context, String name) {
		return context.getArgument(name, Holder.class);
	}

	@Nullable
	public Holder<T> parse(StringReader reader) throws CommandSyntaxException {
		return this.parse(reader, VALUE_PARSER);
	}

	@Nullable
	private <O> Holder<T> parse(StringReader reader, TagParser<O> parser) throws CommandSyntaxException {
		RegistryOps<O> registryOps = this.registryLookup.createSerializationContext(parser.getOps());
		Dynamic<?> dynamic = parseInlineOrId(registryOps, parser, reader);
		return !this.hasRegistry ? null : this.codec.parse(dynamic).getOrThrow(string -> ERROR_FAILED_TO_PARSE.createWithContext(reader, string));
	}

	@VisibleForTesting
	static <T> Dynamic<T> parseInlineOrId(DynamicOps<T> ops, TagParser<T> tagParser, StringReader reader) throws CommandSyntaxException {
		int i = reader.getCursor();
		T object = tagParser.parseAsArgument(reader);
		if (hasConsumedWholeArg(reader)) {
			return new Dynamic<>(ops, object);
		} else {
			reader.setCursor(i);
			ResourceLocation resourceLocation = ResourceLocation.read(reader);
			if (hasConsumedWholeArg(reader)) {
				return new Dynamic<>(ops, ops.createString(resourceLocation.toString()));
			} else {
				reader.setCursor(i);
				throw ERROR_INVALID.createWithContext(reader);
			}
		}
	}

	private static boolean hasConsumedWholeArg(StringReader reader) {
		return !reader.canRead() || reader.peek() == ' ';
	}

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

	public static class LootModifierArgument extends ResourceOrIdArgument<LootItemFunction> {
		protected LootModifierArgument(CommandBuildContext context) {
			super(context, Registries.ITEM_MODIFIER, LootItemFunctions.CODEC);
		}
	}

	public static class LootPredicateArgument extends ResourceOrIdArgument<LootItemCondition> {
		protected LootPredicateArgument(CommandBuildContext context) {
			super(context, Registries.PREDICATE, LootItemCondition.CODEC);
		}
	}

	public static class LootTableArgument extends ResourceOrIdArgument<LootTable> {
		protected LootTableArgument(CommandBuildContext context) {
			super(context, Registries.LOOT_TABLE, LootTable.CODEC);
		}
	}
}