/*

 * Copyright (C) 2011 Openismus GmbH

 *

 * This file is part of GWT-Glom.

 *

 * GWT-Glom is free software: you can redistribute it and/or modify it

 * under the terms of the GNU Lesser General Public License as published by the

 * Free Software Foundation, either version 3 of the License, or (at your

 * option) any later version.

 *

 * GWT-Glom 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 Lesser General Public License

 * for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License

 * along with GWT-Glom.  If not, see <http://www.gnu.org/licenses/>.

 */

package org.glom.web.client.activity;

import org.glom.web.client.StringUtils;

import org.glom.web.client.ClientFactory;

import org.glom.web.client.OnlineGlomServiceAsync;

import org.glom.web.client.Utils;

import org.glom.web.client.event.LocaleChangeEvent;

import org.glom.web.client.event.LocaleChangeEventHandler;

import org.glom.web.client.event.QuickFindChangeEvent;

import org.glom.web.client.event.QuickFindChangeEventHandler;

import org.glom.web.client.event.TableChangeEvent;

import org.glom.web.client.event.TableChangeEventHandler;

import org.glom.web.client.place.DocumentSelectionPlace;

import org.glom.web.client.place.ListPlace;

import org.glom.web.client.ui.AuthenticationPopup;

import org.glom.web.client.ui.ListView;

import org.glom.web.client.ui.View;

import org.glom.web.shared.layout.LayoutGroup;

import com.google.gwt.activity.shared.AbstractActivity;

import com.google.gwt.core.client.GWT;

import com.google.gwt.event.dom.client.ClickEvent;

import com.google.gwt.event.dom.client.ClickHandler;

import com.google.gwt.event.shared.EventBus;

import com.google.gwt.place.shared.Place;

import com.google.gwt.user.client.rpc.AsyncCallback;

import com.google.gwt.user.client.ui.AcceptsOneWidget;

public class ListActivity extends AbstractActivity implements View.Presenter {

	private final String documentID;

	private final String tableName;

	private final String quickFind;

	private final ClientFactory clientFactory;

	private final ListView listView;

	private final AuthenticationPopup authenticationPopup;

	public ListActivity(final ListPlace place, final ClientFactory clientFactory) {

		this.documentID = place.getDocumentID(); // TODO: Just store the place?

		this.tableName = place.getTableName();

		this.quickFind = place.getQuickFind();

		this.clientFactory = clientFactory;

		listView = clientFactory.getListView();

		authenticationPopup = clientFactory.getAuthenticationPopup();

	}

	@Override

	public void start(final AcceptsOneWidget panel, final EventBus eventBus) {

		if (StringUtils.isEmpty(documentID))

			goTo(new DocumentSelectionPlace());

		// register this class as the presenter

		listView.setPresenter(this);

		// TODO this should really be it's own Place/Activity

		// check if the authentication info has been set for the document

		final AsyncCallback<Boolean> isAuthCallback = new AsyncCallback<Boolean>() {

			@Override

			public void onFailure(final Throwable caught) {

				// TODO: create a way to notify users of asynchronous callback failures

				GWT.log("AsyncCallback Failed: OnlineGlomService.isAuthenticated()");

			}

			@Override

			public void onSuccess(final Boolean result) {

				if (!result) {

					setUpAuthClickHandler(eventBus);

					authenticationPopup.center();

				}

			}

		};

		OnlineGlomServiceAsync.Util.getInstance().isAuthenticated(documentID, isAuthCallback);

		// set the change handler for the table selection widget

		eventBus.addHandler(TableChangeEvent.TYPE, new TableChangeEventHandler() {

			@Override

			public void onTableChange(final TableChangeEvent event) {

				goTo(new ListPlace(documentID, event.getNewTableName(), ""));

			}

		});

		// populate the cell table with data

		final AsyncCallback<LayoutGroup> callback = new AsyncCallback<LayoutGroup>() {

			@Override

			public void onFailure(final Throwable caught) {

				// TODO: create a way to notify users of asynchronous callback failures

				GWT.log("AsyncCallback Failed: OnlineGlomService.getListViewLayout()");

			}

			@Override

			public void onSuccess(final LayoutGroup result) {

				// TODO check if result.getTableName() is the same as the tableName field. Update it if it's not the

				// same.

				listView.setCellTable(documentID, result, quickFind);

			}

		};

		final String localeID = Utils.getCurrentLocaleID();

		OnlineGlomServiceAsync.Util.getInstance().getListViewLayout(documentID, tableName, localeID, callback);

		// TODO: Avoid the code duplication with DetailsActivity.

		// set the change handler for the quickfind text widget

		eventBus.addHandler(QuickFindChangeEvent.TYPE, new QuickFindChangeEventHandler() {

			@Override

			public void onQuickFindChange(final QuickFindChangeEvent event) {

				// We switch to the List view, to show search results.

				// TODO: Show the details view if there is only one result.

				goTo(new ListPlace(documentID, tableName, event.getNewQuickFindText()));

			}

		});

		// Set the change handler for the table selection widget

		eventBus.addHandler(LocaleChangeEvent.TYPE, new LocaleChangeEventHandler() {

			@Override

			public void onLocaleChange(final LocaleChangeEvent event) {

				// note the empty primary key item

				goTo(new ListPlace(documentID, tableName, quickFind));

			}

		});

		// indicate that the view is ready to be displayed

		panel.setWidget(listView.asWidget());

	}

	private void setUpAuthClickHandler(final EventBus eventBus) {

		authenticationPopup.setClickOkHandler(new ClickHandler() {

			@Override

			public void onClick(final ClickEvent event) {

				authenticationPopup.setTextFieldsEnabled(false);

				final AsyncCallback<Boolean> callback = new AsyncCallback<Boolean>() {

					@Override

					public void onFailure(final Throwable caught) {

						// TODO: create a way to notify users of asynchronous callback failures

						GWT.log("AsyncCallback Failed: OnlineGlomService.checkAuthentication()");

					}

					@Override

					public void onSuccess(final Boolean result) {

						if (result) {

							authenticationPopup.hide();

							eventBus.fireEvent(new TableChangeEvent(clientFactory.getTableSelectionView()

									.getSelectedTableName()));

						} else {

							authenticationPopup.setTextFieldsEnabled(true);

							authenticationPopup.setError();

						}

					}

				};

				OnlineGlomServiceAsync.Util.getInstance().checkAuthentication(documentID,

						authenticationPopup.getUsername(), authenticationPopup.getPassword(), callback);

			}

		});

	}

	private void clearView() {

		authenticationPopup.hide();

		authenticationPopup.clear();

		listView.clear();

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see com.google.gwt.activity.shared.AbstractActivity#onCancel()

	 */

	@Override

	public void onCancel() {

		clearView();

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see com.google.gwt.activity.shared.AbstractActivity#onStop()

	 */

	@Override

	public void onStop() {

		clearView();

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see org.glom.web.client.ui.View.Presenter#goTo(com.google.gwt.place.shared.Place)

	 */

	@Override

	public void goTo(final Place place) {

		clientFactory.getPlaceController().goTo(place);

	}

}