package net.minecraft.server.jsonrpc.internalapi;

import java.util.List;
import java.util.Optional;
import java.util.UUID;
import java.util.concurrent.CompletableFuture;
import net.minecraft.server.jsonrpc.methods.ClientInfo;
import net.minecraft.server.level.ServerPlayer;
import net.minecraft.server.players.NameAndId;
import net.minecraft.util.Util;
import org.jspecify.annotations.Nullable;

public interface MinecraftPlayerListService {
	List<ServerPlayer> getPlayers();

	@Nullable
	ServerPlayer getPlayer(UUID uuid);

	default CompletableFuture<Optional<NameAndId>> getUser(final Optional<UUID> id, final Optional<String> name) {
		if (id.isPresent()) {
			Optional<NameAndId> nameAndId = this.getCachedUserById((UUID)id.get());
			return nameAndId.isPresent()
				? CompletableFuture.completedFuture(nameAndId)
				: CompletableFuture.supplyAsync(() -> this.fetchUserById((UUID)id.get()), Util.nonCriticalIoPool());
		} else {
			return name.isPresent()
				? CompletableFuture.supplyAsync(() -> this.fetchUserByName((String)name.get()), Util.nonCriticalIoPool())
				: CompletableFuture.completedFuture(Optional.empty());
		}
	}

	Optional<NameAndId> fetchUserByName(String name);

	Optional<NameAndId> fetchUserById(UUID id);

	Optional<NameAndId> getCachedUserById(UUID id);

	Optional<ServerPlayer> getPlayer(Optional<UUID> id, Optional<String> name);

	List<ServerPlayer> getPlayersWithAddress(String ip);

	@Nullable
	ServerPlayer getPlayerByName(String name);

	void remove(ServerPlayer player, ClientInfo clientInfo);
}