package org.openslx.dozmod.gui.window;

import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.List;

import org.openslx.dozmod.gui.Gui;
import org.openslx.dozmod.gui.Gui.GuiCallable;
import org.openslx.dozmod.gui.control.JCheckBoxTree.CheckChangeEvent;
import org.openslx.dozmod.gui.control.JCheckBoxTree.CheckChangeEventListener;
import org.openslx.dozmod.gui.helper.MessageType;
import org.openslx.dozmod.gui.helper.UiFeedback;
import org.openslx.dozmod.gui.window.layout.LocationSelectionWindowLayout;
import org.openslx.dozmod.thrift.Session;

/**
 * Minimal window containing a LocationSelector widget
 * 
 * @author Jonathan Bauer
 * 
 */
public class LocationSelectionWindow extends LocationSelectionWindowLayout implements UiFeedback {

	/**
	 * 
	 */
	private static final long serialVersionUID = -5898656786160024212L;
	private boolean apply = false;

	/**
	 * @param modalParent
	 *            parent to this window
	 * @param list
	 *            of locations to preselect in the LocationSelector
	 */
	public LocationSelectionWindow(Window modalParent, List<Integer> locations, boolean limitToLocations) {
		super(modalParent, locations, limitToLocations);

		ctlLocationSelector.setSelectedLocationsAsIds(locations);
		ctlLocationSelector.setOnlyInSelection(limitToLocations);

		// listeners for the buttons
		btnClose.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO safe close? (unsaved changes -> user must confirm)
				dispose();
			}
		});
		// disable "Save" button at first since nothing changed
		btnSaveChanges.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				List<Integer> tempIntList = ctlLocationSelector.getSelectedLocationsAsIds();
				if (tempIntList != null
						&& tempIntList.size() > Session.getSatelliteConfig().maxLocationsPerLecture) {
					ctlLocationSelector.setSelectedLocationsAsIds(tempIntList);
					Gui.showMessageBox("Bitten reduzieren Sie die Anzahl gewählter Orte",
							MessageType.WARNING, null, null);
					return;
				}
				apply = true;
				dispose();
			}
		});

		// addCheckChangeEventListener
		ctlLocationSelector.addCheckChangeEventListener(new CheckChangeEventListener() {
			@Override
			public void checkStateChanged(CheckChangeEvent event) {
				List<Integer> tempIntList = ctlLocationSelector.getSelectedLocationsAsIds();
				if (tempIntList != null) {
					if (tempIntList.size() > Session.getSatelliteConfig().maxLocationsPerLecture) {
						// add error
						lblError.setText("Zu viele Orte ausgewählt!");
					} else {
						lblError.setText("");
					}
				}
			}
		});

		Gui.centerShellOverShell(modalParent, this);
	}

	/**
	 * @return list of ids of the selected locations. Will be either a new list
	 *         if the user clicked apply or the list received from the sat.
	 */
	public LocationInfo runAndReturn() {
		setVisible(true);
		if (!apply)
			return null;
		return new LocationInfo(ctlLocationSelector.getSelectedLocationsAsIds(),
				ctlLocationSelector.getOnlyInSelection());
	}

	/**
	 * Static method to open this window with
	 * 
	 * @param modalParent
	 *            parent to this window
	 * @param locations
	 *            locations to preselect in the LocationSelector
	 * @return forwards the return value of the window itself: list of ids of
	 *         the selected locations
	 */
	public static LocationInfo open(final Window modalParent, final List<Integer> locations,
			final boolean limitToLocations) {
		return Gui.syncExec(new GuiCallable<LocationInfo>() {
			@Override
			public LocationInfo run() {
				return new LocationSelectionWindow(modalParent, locations, limitToLocations).runAndReturn();
			}
		});
	}

	@Override
	public boolean wantConfirmQuit() {
		return false;
	}

	@Override
	public void escapePressed() {
		dispose();
	}
}

class LocationInfo {
	public List<Integer> locationList;
	public boolean limitToLocations;

	public LocationInfo(List<Integer> locs, boolean limited) {
		this.locationList = locs;
		this.limitToLocations = limited;
	}
}