/*
 * 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.view;

import java.awt.BorderLayout;
import java.awt.Dimension;

import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JSplitPane;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import eu.omp.irap.vespa.epntapclient.controller.EpnTapController;
import eu.omp.irap.vespa.epntapclient.votable.view.VOTableView;

/**
 * @author N. Jourdane
 */
public class EpnTapMainView extends JPanel {

	/** The logger for this class. */
	static final Logger logger = LogManager.getLogger(EpnTapMainView.class);

	/** The serial version UID (affected with a random number). */
	private static final long serialVersionUID = -1233290271099283814L;

	/** The JPanel where the VOTable results is displayed. */
	private VOTableView resultsView;

	/** The JPanel where the list of services is displayed. */
	private VOTableView servicesView;

	/** The JPanel where the user put requests. */
	private RequestView requestView;

	/** The main EPN-TAP main controller */
	private EpnTapController controller;

	/** The width of the left panel (services view). */
	static final int LEFT_PANEL_WIDTH = 400;
	/** The minimum width of the left panel (services view). */
	static final int LEFT_PANEL_MIN_WIDTH = 100;
	/** The width of the right panel (request view). */
	static final int RIGHT_PANEL_WIDTH = 400;
	/** The minimum width of the right panel (request view). */
	static final int RIGHT_PANEL_MIN_WIDTH = 100;

	/** The height of the top panel (request view and services view). */
	static final int TOP_PANEL_HEIGHT = 250;
	/** The minimum height of the top panel (request view and services view). */
	static final int TOP_PANEL_MIN_HEIGHT = 100;
	/** The height of the bottom panel (result view). */
	static final int BOTTOM_PANEL_HEIGHT = 150;
	/** The minimum height of the bottom panel (result view). */
	static final int BOTTOM_PANEL_MIN_HEIGHT = 100;

	/**
	 * The constructor of the view.
	 * 
	 * @param controller The EPN-TAP controller, allowing the EPN-TAP view to send events.
	 * @param servicesView The JPanel representing the table of services.
	 * @param resultsView The JPanel representing the table of results.
	 */
	public EpnTapMainView(EpnTapController controller, VOTableView servicesView,
			VOTableView resultsView) {
		this.controller = controller;
		this.servicesView = servicesView;
		this.resultsView = resultsView;
		this.requestView = new RequestView(this);

		setLayout(new BorderLayout());
		buildWindow();

		// TODO: Support multi-selection
		servicesView.getTable().getSelectionModel().addListSelectionListener(
				e -> controller.updateSelected(servicesView.getTable().getSelectedRow()));
	}

	/**
	 * @return The main EPNT-TAP controller.
	 */
	public EpnTapController getController() {
		return controller;
	}

	/**
	 * @return The JPanel where the VOTable results is displayed.
	 */
	public VOTableView getResultsView() {
		return resultsView;
	}

	/**
	 * @return The JPanel where the GUI elements to make the request are displayed.
	 */
	public RequestView getRequestView() {
		return requestView;
	}

	/**
	 * @return The JPanel where the list of services is displayed.
	 */
	public VOTableView getServicesView() {
		return servicesView;
	}

	/**
	 * Build and fill the GUI.
	 */
	public void buildWindow() {
		JSplitPane northPanel = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, servicesView,
				requestView);

		servicesView.setPreferredSize(new Dimension(LEFT_PANEL_WIDTH, TOP_PANEL_HEIGHT));
		servicesView.setMinimumSize(new Dimension(LEFT_PANEL_MIN_WIDTH, TOP_PANEL_MIN_HEIGHT));

		// TODO: put requestView inside a JScrollPane.
		requestView.setPreferredSize(new Dimension(RIGHT_PANEL_WIDTH, TOP_PANEL_HEIGHT));
		requestView.setMinimumSize(new Dimension(RIGHT_PANEL_MIN_WIDTH, TOP_PANEL_MIN_HEIGHT));

		resultsView.setPreferredSize(
				new Dimension(LEFT_PANEL_WIDTH + RIGHT_PANEL_WIDTH, BOTTOM_PANEL_HEIGHT));
		resultsView.setMinimumSize(
				new Dimension(LEFT_PANEL_MIN_WIDTH + RIGHT_PANEL_MIN_WIDTH,
						BOTTOM_PANEL_MIN_HEIGHT));

		JSplitPane mainPanel = new JSplitPane(JSplitPane.VERTICAL_SPLIT, northPanel, resultsView);
		add(mainPanel, BorderLayout.CENTER);
	}

	/**
	 * Display an error.
	 *
	 * @param title The title of the error.
	 * @param message The message of the error.
	 */
	public void displayError(String title, String message) {
		JOptionPane.showMessageDialog(this, message, title,
				JOptionPane.ERROR_MESSAGE);
	}

}