package com.github.dnx5.bukkit.util;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import org.bukkit.event.Event;
import org.bukkit.event.EventHandler;
import org.bukkit.event.HandlerList;
import org.bukkit.event.Listener;

public class BukkitUnregisterListener {

    public static void unregisterListener(Listener listener) {
        for (Method method : listener.getClass().getDeclaredMethods()) {
            if (method.isAnnotationPresent(EventHandler.class)) {
                for (Class<?> clazz : method.getParameterTypes()) {
                    if (Event.class.isAssignableFrom(clazz)) {
                        try {
                            Method getHandlerList = clazz.getMethod("getHandlerList");
                            HandlerList handlers = (HandlerList) getHandlerList.invoke(null);
                            handlers.unregister(listener);
                        } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
                            e.printStackTrace();
                        }
                    }
                }
            }
        }
    }
}