/*
 * Copyright (C) 2013 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jboss.errai.demo.grocery.client.local;

import com.google.common.collect.ImmutableMultimap;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import org.jboss.errai.demo.grocery.client.local.producer.StoreListProducer.StoreChangedEvent;
import org.jboss.errai.demo.grocery.client.shared.Store;
import org.jboss.errai.ioc.client.api.LoadAsync;
import org.jboss.errai.ui.client.widget.ListWidget;
import org.jboss.errai.ui.nav.client.local.Page;
import org.jboss.errai.ui.nav.client.local.TransitionTo;
import org.jboss.errai.ui.shared.api.annotations.DataField;
import org.jboss.errai.ui.shared.api.annotations.EventHandler;
import org.jboss.errai.ui.shared.api.annotations.Templated;

import javax.annotation.PostConstruct;
import javax.enterprise.context.Dependent;
import javax.enterprise.event.Observes;
import javax.inject.Inject;
import javax.persistence.EntityManager;
import java.util.List;

@Dependent
@Templated("#root")
@Page
@LoadAsync
public class StoresPage extends Composite {

    @Inject
    private EntityManager em;

    @Inject
    TransitionTo<StorePage> toStorePage;

    @Inject
    @DataField
    ListWidget<Store, StoreWidget> storeList;

    @Inject
    @DataField
    Button addStoreButton;

    @PostConstruct
    private void initInstance() {
        List<Store> allStores = em.createNamedQuery("allStores", Store.class).getResultList();
        storeList.setItems(allStores);
    }

    public void storeListChanged(@Observes StoreChangedEvent event) {
        storeList.setItems(event.getStores());
    }

    @EventHandler("addStoreButton")
    public void onStoreAddButtonClick(ClickEvent event) {
        Store newStore = new Store();
        em.persist(newStore);
        toStorePage.go(ImmutableMultimap.of("id", String.valueOf(newStore.getId())));
    }
}