/*
 * This file is a part of EpnTAPClient.
 * This program aims to provide EPN-TAP support for software clients, like CASSIS spectrum analyzer.
 * See draft specifications: https://voparis-confluence.obspm.fr/pages/viewpage.action?pageId=559861
 * Copyright (C) 2016 Institut de Recherche en Astrophysique et Planétologie.
 *
 * This program is free software: you can
 * redistribute it and/or modify it under the terms of the GNU General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or (at your option) any later
 * version. This program is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE. See the GNU General Public License for more details. You should have received a copy of
 * the GNU General Public License along with this program. If not, see
 * <http://www.gnu.org/licenses/>.
 */

package eu.omp.irap.vespa.epntapclient;

import java.util.HashMap;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;

import eu.omp.irap.vespa.epntapclient.service.Queries;
import eu.omp.irap.vespa.epntapclient.service.ServiceCore;
import eu.omp.irap.vespa.votable.Consts;
import eu.omp.irap.vespa.votable.controller.CantGetVOTableException;
import eu.omp.irap.vespa.votable.controller.VOTableController;

/**
 * The main controller which manage views and controllers.
 *
 * @author N. Jourdane
 */
public class EpnTapController {

	/** The logger for the class EpnTapController. */
	private static final Logger logger = Logger.getLogger(EpnTapController.class.getName());

	/** The controller of the VOTable displaying the list of services. */
	protected VOTableController servicesCtrl;

	/** The controller of the VOTable displaying the result. */
	protected VOTableController resultsCtrl;

	/**
	 * The parameters fields for the request.
	 */
	protected Map<String, Object> paramValues = new HashMap<>();


	/**
	 * Method constructor, which initialize servicesController, resultsController and mainView.
	 */
	public EpnTapController() {
		String query = String.format(Queries.SELECT_ALL_TAP_SERVICES_WHERE_CORE,
				ServiceCore.EPNCORE);
		servicesCtrl = new VOTableController(Consts.DEFAULT_REGISTRY_URL, query);
	}

	/**
	 * Get the services from the XML path or the targetURL / query.
	 */
	public void readServices() {
		try {
			servicesCtrl.readTable();
		} catch (CantGetVOTableException e) {
			displayError("Can not get services.", e);
		}
	}

	/**
	 * display an error with the logger.
	 *
	 * @param message A small error message.
	 * @param e The error.
	 */
	@SuppressWarnings("static-method")
	public void displayError(String message, Exception e) {
		logger.log(Level.SEVERE, message, e);
	}

	/**
	 * Send the query to the specified service.
	 *
	 * @param query An ADQL query to send.
	 * @param tableServiceURL the URL of the service.
	 * @return The Path of the VOTable containing the result, downloaded in the system temporary
	 *         path.
	 * @throws CantGetVOTableException Can not get the VOTable.
	 */
	public String sendQuery(String query, String tableServiceURL)
			throws CantGetVOTableException {
		resultsCtrl = new VOTableController(tableServiceURL, query);
		resultsCtrl.readTable();
		return resultsCtrl.getVOTablePath();
	}

	/**
	 * @return The controller of the VOTable which displays the result of the query.
	 */
	public VOTableController getResultsController() {
		return resultsCtrl;
	}

	/**
	 * @return The controller of the VOTable which displays the list of services.
	 */
	public VOTableController getServicesController() {
		return servicesCtrl;
	}

	/**
	 * Update a specified parameter
	 *
	 * @param paramName The name of the parameter.
	 * @param paramValue The new value of the parameter
	 */
	public void updateParameter(String paramName, Object paramValue) {
		paramValues.put(paramName, paramValue);
	}

	/**
	 * Remove a specified parameter.
	 *
	 * @param paramName the name of the parameter.
	 */
	public void removeParameter(String paramName) {
		paramValues.remove(paramName);
	}

	/**
	 * Get the values of all the parameters.
	 *
	 * @return A map containing all the values, as couples <key, value>.
	 */
	public Map<String, Object> getParamValues() {
		return paramValues;
	}
}