de.GameplayJDK.API.TimedFunctionCall

package de.GameplayJDK.TimerAPI.API;

import java.util.concurrent.Callable;

/**
 * 
 * @author GameplayJDK
 *
 */
public class TimedFunctionCall {
	
	private Callable<Object> function;
	private Object[] args;
	private int sleep;
	
	/**
	 * 
	 * @param function
	 * @param sleep
	 */
	public TimedFunctionCall(Callable<Object> function, int sleep) {
		this.function = function;
		this.args = null;
		this.sleep = sleep;
	}
	
	/**
	 * 
	 * @param function
	 * @param args
	 * @param sleep
	 */
	public TimedFunctionCall(Callable<Object> function, Object[] args, int sleep) {
		this.function = function;
		this.args = args;
		this.sleep = sleep;
	}
	
	private boolean active = false;
	
	/**
	 * 
	 * @return
	 */
	public TimedFunctionCall call() {
		this.active = true;
		this.runFunction();
		return this;
	}
	
	/**
	 * 
	 * @return
	 */
	public TimedFunctionCall callNow() {
		this.active = false;
		doTimedCall();
		return this;
	}
	
	/**
	 * 
	 * @return
	 */
	public TimedFunctionCall cancel() {
		this.active = false;
		return this;
	}
	
	private void runFunction() {
		new Runnable() {
			@Override
			public void run() {
				long starttime = System.currentTimeMillis();
				long waittime = sleep * 1000;
				while (active) {
					long currenttime = System.currentTimeMillis();
					if (currenttime >= starttime + waittime) {
						doTimedCall();
						break;
					}
				}
			}
		};
	}
	
	private void doTimedCall() {
		try {
			execute(this.args, this.function);
		} catch (Exception e) {
			e.printStackTrace();
		}
		this.active = false;
	}
	
	/**
	 * 
	 * @param args
	 * @param method
	 * @return
	 * @throws Exception
	 */
	private static Object execute(Object[] args, Callable<Object> method) throws Exception {
		return method.call();
	}
	
}