CinderLoE/src/main/java/com/zivilon/cinder_loe/command/CommandOpenCarriageMenu.java

package com.zivilon.cinder_loe.command;

import com.zivilon.cinder_loe.carriage.CarriageDestination;
import com.zivilon.cinder_loe.carriage.CarriageDestinationsData;
import com.zivilon.cinder_loe.network.PacketOpenCarriageGui;
import lotr.common.network.LOTRPacketHandler;
import net.minecraft.command.CommandBase;
import net.minecraft.command.CommandException;
import net.minecraft.command.ICommandSender;

import net.minecraft.entity.player.EntityPlayerMP;
import net.minecraft.world.World;

import java.util.ArrayList;
import java.util.List;

public class CommandOpenCarriageMenu extends CommandBase {
    @Override
    public String getCommandName() {
        return "open_carriage_menu";
    }

    @Override
    public String getCommandUsage(ICommandSender sender) {
        return "/open_carriage_menu";
    }

    @Override
    public void processCommand(ICommandSender sender, String[] args) {
        if (!(sender instanceof EntityPlayerMP)) {
            throw new CommandException("Must be run by a player.");
        }

        EntityPlayerMP player = (EntityPlayerMP) sender;
        World world = player.worldObj;

        CarriageDestinationsData data = CarriageDestinationsData.get(world);
        List<CarriageDestination> nearest = data.getNearestFour(player.posX, player.posZ);

        List<String> names = new ArrayList<>();
        List<Integer> costs = new ArrayList<>();

        for (CarriageDestination dest : nearest) {
            double dist = Math.sqrt(Math.pow(dest.x - player.posX, 2) + Math.pow(dest.z - player.posZ, 2));
            int cost = Math.max(1, (int)(dist / 50));
            names.add(dest.name);
            costs.add(cost);
        }

        LOTRPacketHandler.networkWrapper.sendTo(new PacketOpenCarriageGui(names, costs), player);
    }
}