package net.minecraft.server.commands;

import com.mojang.brigadier.CommandDispatcher;
import java.util.List;
import java.util.function.Function;
import net.minecraft.commands.CommandSourceStack;
import net.minecraft.commands.Commands;
import net.minecraft.network.chat.Component;
import net.minecraft.network.chat.ComponentUtils;
import net.minecraft.server.level.ServerPlayer;
import net.minecraft.server.players.PlayerList;
import net.minecraft.world.entity.player.Player;

public class ListPlayersCommand {
	public static void register(final CommandDispatcher<CommandSourceStack> dispatcher) {
		dispatcher.register(
			Commands.literal("list").executes(c -> listPlayers(c.getSource())).then(Commands.literal("uuids").executes(c -> listPlayersWithUuids(c.getSource())))
		);
	}

	private static int listPlayers(final CommandSourceStack source) {
		return format(source, Player::getDisplayName);
	}

	private static int listPlayersWithUuids(final CommandSourceStack source) {
		return format(source, player -> Component.translatable("commands.list.nameAndId", player.getName(), Component.translationArg(player.getGameProfile().id())));
	}

	private static int format(final CommandSourceStack source, final Function<ServerPlayer, Component> formatter) {
		PlayerList playerList = source.getServer().getPlayerList();
		List<ServerPlayer> players = playerList.getPlayers();
		Component listComponent = ComponentUtils.formatList(players, formatter);
		source.sendSuccess(() -> Component.translatable("commands.list.players", players.size(), playerList.getMaxPlayers(), listComponent), false);
		return players.size();
	}
}