package org.openslx.dozmod.gui.wizard;

import java.awt.Window;

import org.apache.log4j.Logger;
import org.apache.thrift.TException;
import org.openslx.bwlp.thrift.iface.ImageSummaryRead;
import org.openslx.bwlp.thrift.iface.LectureWrite;
import org.openslx.dozmod.gui.Gui;
import org.openslx.dozmod.gui.MainWindow;
import org.openslx.dozmod.gui.helper.MessageType;
import org.openslx.dozmod.gui.helper.UiFeedback;
import org.openslx.dozmod.gui.window.LectureListWindow;
import org.openslx.dozmod.gui.wizard.page.LectureCreationPage;
import org.openslx.dozmod.gui.wizard.page.LectureCustomPermissionPage;
import org.openslx.dozmod.gui.wizard.page.LectureOptionsPage;
import org.openslx.dozmod.state.LectureWizardState;
import org.openslx.dozmod.thrift.Session;
import org.openslx.dozmod.thrift.ThriftError;
import org.openslx.dozmod.thrift.cache.LectureCache;
import org.openslx.thrifthelper.ThriftManager;

@SuppressWarnings("serial")
public class LectureWizard extends Wizard implements UiFeedback {

	private final static Logger LOGGER = Logger.getLogger(LectureWizard.class);

	public final LectureWizardState state = new LectureWizardState();

	/**
	 * Wizard for creating or editing a lecture
	 * 
	 * @param editExistingLecture whether to create new or edit existing lecture
	 */
	public LectureWizard(Window parent, ImageSummaryRead image, String imageVersionId) {
		super(parent);

		// sanity check on the image
		if (image == null || imageVersionId == null) {
			throw new NullPointerException("LectureWizard needs ImageSummaryRead + imageVersionId!");
		}
		this.state.image = image;
		this.state.imageVersionId = imageVersionId;

		// create the shared object for all pages of the wizard
		addPage(new LectureCreationPage(this, state));
		addPage(new LectureOptionsPage(this, state));
		addPage(new LectureCustomPermissionPage(this, state));
	}

	@Override
	public String getWindowTitle() {
		return "Neue Veranstaltung erzeugen";
	}

	@Override
	protected boolean onCancelRequest() {
		return Gui.showMessageBox(this, "Möchten Sie den Vorgang wirklich abbrechen?",
				MessageType.QUESTION_YESNO, null, null);
	}

	@Override
	public boolean wantConfirmQuit() {
		return state.uuid != null;
	}

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

	@Override
	public boolean wantFinish() {
		// since we only started the upload and created a "blank" image entry
		// we can here do all the sanity checks on the fields of UploadWizardState
		// and react accordingly.
		if (!isStateValid())
			return false;
		// Now try to submit
		if (state.uuid != null) {
			// already got a uuid, this is bad as we were about to do it!
			LOGGER.error("UUID for new lecture already present, something's bad...");
			return true;
		}
		// ok, lets create it
		try {
			// push to sat
			state.uuid = ThriftManager.getSatClient().createLecture(Session.getSatelliteToken(),
					lectureWriteFromState());
		} catch (TException e) {
			ThriftError.showMessage(this, LOGGER, e, "Fail to create lecture");
			return false;
		}
		if (Gui.showMessageBox(this, "Veranstaltung erstellt! Wollen Sie zur Übersicht wechseln?",
				MessageType.QUESTION_YESNO, null, null)) {
			LectureCache.get(true);
			MainWindow.showPage(LectureListWindow.class);
		}
		// TODO evaluate table state and create the map of permissions
		// TODO run the actually request over external threaded class
		return true;
	}

	private boolean isStateValid() {
		// debug purposes
		if (state.name == null || state.name.isEmpty()) {
			LOGGER.error("No name set in state!");
			return false;
		}
		if (state.description == null || state.description.isEmpty()) {
			LOGGER.error("No description set in state!");
			return false;
		}
		if (state.start == null) {
			LOGGER.error("No start date set in state!");
			return false;
		}
		if (state.end == null) {
			LOGGER.error("No start date set in state!");
			return false;
		}
		return true;
	}

	private LectureWrite lectureWriteFromState() {
		return new LectureWrite(state.name, state.description, state.imageVersionId, state.autoUpdate,
				state.isEnabled, state.start.getTime() / 1000L, state.end.getTime() / 1000L, null, null,
				state.isExam, state.internetAccess, state.defaultPermissions);
	}
}