package net.minecraft.server.commands;

import com.mojang.brigadier.CommandDispatcher;
import com.mojang.brigadier.exceptions.CommandSyntaxException;
import com.mojang.brigadier.exceptions.SimpleCommandExceptionType;
import java.util.Collection;
import net.minecraft.commands.CommandSourceStack;
import net.minecraft.commands.Commands;
import net.minecraft.commands.SharedSuggestionProvider;
import net.minecraft.commands.arguments.GameProfileArgument;
import net.minecraft.network.chat.Component;
import net.minecraft.server.players.NameAndId;
import net.minecraft.server.players.PlayerList;

public class OpCommand {
	private static final SimpleCommandExceptionType ERROR_ALREADY_OP = new SimpleCommandExceptionType(Component.translatable("commands.op.failed"));

	public static void register(final CommandDispatcher<CommandSourceStack> dispatcher) {
		dispatcher.register(
			Commands.literal("op")
				.requires(Commands.hasPermission(Commands.LEVEL_ADMINS))
				.then(
					Commands.argument("targets", GameProfileArgument.gameProfile())
						.suggests(
							(c, p) -> {
								PlayerList list = c.getSource().getServer().getPlayerList();
								return SharedSuggestionProvider.suggest(
									list.getPlayers().stream().filter(player -> !list.isOp(player.nameAndId())).map(pl -> pl.getGameProfile().name()), p
								);
							}
						)
						.executes(c -> opPlayers(c.getSource(), GameProfileArgument.getGameProfiles(c, "targets")))
				)
		);
	}

	private static int opPlayers(final CommandSourceStack source, final Collection<NameAndId> players) throws CommandSyntaxException {
		PlayerList list = source.getServer().getPlayerList();
		int count = 0;

		for (NameAndId player : players) {
			if (!list.isOp(player)) {
				list.op(player);
				count++;
				source.sendSuccess(() -> Component.translatable("commands.op.success", player.name()), true);
			}
		}

		if (count == 0) {
			throw ERROR_ALREADY_OP.create();
		} else {
			return count;
		}
	}
}