package net.minecraft.stats;

import java.util.Objects;
import net.minecraft.core.registries.BuiltInRegistries;
import net.minecraft.core.registries.Registries;
import net.minecraft.network.RegistryFriendlyByteBuf;
import net.minecraft.network.codec.ByteBufCodecs;
import net.minecraft.network.codec.StreamCodec;
import net.minecraft.resources.Identifier;
import net.minecraft.world.scores.criteria.ObjectiveCriteria;
import org.jspecify.annotations.Nullable;

public class Stat<T> extends ObjectiveCriteria {
	public static final StreamCodec<RegistryFriendlyByteBuf, Stat<?>> STREAM_CODEC = ByteBufCodecs.registry(Registries.STAT_TYPE)
		.dispatch(Stat::getType, StatType::streamCodec);
	private final StatFormatter formatter;
	private final T value;
	private final StatType<T> type;

	protected Stat(final StatType<T> type, final T value, final StatFormatter formatter) {
		super(buildName(type, value));
		this.type = type;
		this.formatter = formatter;
		this.value = value;
	}

	public static <T> String buildName(final StatType<T> type, final T value) {
		return locationToKey(BuiltInRegistries.STAT_TYPE.getKey(type)) + ":" + locationToKey(type.getRegistry().getKey(value));
	}

	private static String locationToKey(@Nullable final Identifier location) {
		return location.toString().replace(':', '.');
	}

	public StatType<T> getType() {
		return this.type;
	}

	public T getValue() {
		return this.value;
	}

	public String format(final int value) {
		return this.formatter.format(value);
	}

	public boolean equals(final Object o) {
		return this == o || o instanceof Stat && Objects.equals(this.getName(), ((Stat)o).getName());
	}

	public int hashCode() {
		return this.getName().hashCode();
	}

	public String toString() {
		return "Stat{name=" + this.getName() + ", formatter=" + this.formatter + "}";
	}
}