package net.minecraft.commands.arguments;

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.suggestion.Suggestions;
import com.mojang.brigadier.suggestion.SuggestionsBuilder;
import java.util.Arrays;
import java.util.Collection;
import java.util.concurrent.CompletableFuture;
import net.minecraft.commands.CommandSourceStack;
import net.minecraft.commands.ParserUtils;
import net.minecraft.commands.SharedSuggestionProvider;
import net.minecraft.network.chat.Component;
import net.minecraft.world.inventory.SlotRange;
import net.minecraft.world.inventory.SlotRanges;

public class SlotArgument implements ArgumentType<Integer> {
	private static final Collection<String> EXAMPLES = Arrays.asList("container.5", "weapon");
	private static final DynamicCommandExceptionType ERROR_UNKNOWN_SLOT = new DynamicCommandExceptionType(id -> Component.translatableEscape("slot.unknown", id));
	private static final DynamicCommandExceptionType ERROR_ONLY_SINGLE_SLOT_ALLOWED = new DynamicCommandExceptionType(
		id -> Component.translatableEscape("slot.only_single_allowed", id)
	);

	public static SlotArgument slot() {
		return new SlotArgument();
	}

	public static int getSlot(final CommandContext<CommandSourceStack> context, final String name) {
		return context.<Integer>getArgument(name, Integer.class);
	}

	public Integer parse(final StringReader reader) throws CommandSyntaxException {
		String name = ParserUtils.readWhile(reader, c -> c != ' ');
		SlotRange result = SlotRanges.nameToIds(name);
		if (result == null) {
			throw ERROR_UNKNOWN_SLOT.createWithContext(reader, name);
		} else if (result.size() != 1) {
			throw ERROR_ONLY_SINGLE_SLOT_ALLOWED.createWithContext(reader, name);
		} else {
			return result.slots().getInt(0);
		}
	}

	@Override
	public <S> CompletableFuture<Suggestions> listSuggestions(final CommandContext<S> contextBuilder, final SuggestionsBuilder builder) {
		return SharedSuggestionProvider.suggest(SlotRanges.singleSlotNames(), builder);
	}

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