//Dstl (c) Crown Copyright 2017
package uk.gov.dstl.baleen.core.web.servlets;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.eclipse.jetty.http.HttpMethod;
import org.eclipse.jetty.http.HttpStatus;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import uk.gov.dstl.baleen.core.manager.BaleenManager;
import uk.gov.dstl.baleen.core.web.security.WebPermission;

/**
 * Provides ability to control the BaleenManager instance {@link BaleenManager}
 *
 * End points:
 *
 * /stop will shutdown the whole baleen instance.
 *
 * If using authentication, the user will need the "manager.stop".
 *
 * 
 * 
 *
 */
public class BaleenManagerServlet extends AbstractApiServlet {
	private static final Logger LOGGER = LoggerFactory.getLogger(BaleenManagerServlet.class);

	private static final long serialVersionUID = 1L;

	private final transient BaleenManager manager;

	/**
	 * New instance, to control the baleen manager.
	 *
	 * @param manager
	 *            the pipeline manager what owns the pipelines
	 */
	public BaleenManagerServlet(BaleenManager manager) {
		super(LOGGER, BaleenManagerServlet.class);
		this.manager = manager;
	}

	@Override
	public WebPermission[] getPermissions() {
		return new WebPermission[] { new WebPermission("Stop Baleen", HttpMethod.POST, "manager.stop") };
	}

	@Override
	protected void post(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		String servletPath = req.getRequestURI();
		if (servletPath.endsWith("stop")) {
			manager.stop();
		} else {
			respondWithError(resp, HttpStatus.BAD_REQUEST_400, "Unknown request");
		}
	}
}