/*
 * Copyright 2004-2014 ICEsoft Technologies Canada Corp.
 *
 * 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.icefaces.samples.showcase.example.ace.dataTable;

import org.icefaces.ace.component.datatable.DataTable;
import org.icefaces.samples.showcase.dataGenerators.utilityClasses.DataTableData;
import org.icefaces.samples.showcase.example.compat.dataTable.Car;
import org.icefaces.samples.showcase.metadata.annotation.ComponentExample;
import org.icefaces.samples.showcase.metadata.annotation.ExampleResource;
import org.icefaces.samples.showcase.metadata.annotation.ExampleResources;
import org.icefaces.samples.showcase.metadata.annotation.ResourceType;
import org.icefaces.samples.showcase.metadata.context.ComponentExampleImpl;
import org.icefaces.samples.showcase.util.FacesUtils;

import javax.annotation.PostConstruct;
import javax.faces.application.Application;
import javax.faces.bean.CustomScoped;
import javax.faces.bean.ManagedBean;
import javax.faces.context.FacesContext;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

@ComponentExample(
        parent = DataTableBean.BEAN_NAME,
        title = "example.ace.dataTable.grouping.title",
        description = "example.ace.dataTable.grouping.description",
        example = "/resources/examples/ace/dataTable/dataTableGrouping.xhtml"
)
@ExampleResources(
        resources ={
            // xhtml
            @ExampleResource(type = ResourceType.xhtml,
                    title="dataTableGrouping.xhtml",
                    resource = "/resources/examples/ace/dataTable/dataTableGrouping.xhtml"),
            // Java Source
            @ExampleResource(type = ResourceType.java,
                    title="DataTableGrouping.java",
                    resource = "/WEB-INF/classes/org/icefaces/samples/showcase"+
                    "/example/ace/dataTable/DataTableGrouping.java")
        }
)
@ManagedBean(name= DataTableGrouping.BEAN_NAME)
@CustomScoped(value = "#{window}")
public class DataTableGrouping extends ComponentExampleImpl<DataTableGrouping> implements Serializable {
    public static final String BEAN_NAME = "dataTableGrouping";
    private List<Car> carsData;

    /////////////---- CONSTRUCTOR BEGIN
    public DataTableGrouping() {
        super(DataTableGrouping.class);
        carsData = new ArrayList<Car>(DataTableData.getDefaultData());
    }

    public Class getClazz() {
        return getClass();
    }

    @PostConstruct
    public void initMetaData() {
        super.initMetaData();
    }

    /////////////---- GETTERS & SETTERS BEGIN
    public List<Car> getCarsData() { return carsData; }
    public void setCarsData(List<Car> carsData) { this.carsData = carsData; }
    
    /////////////---- METHOD INVOCATION VIA VIEW EL
    public double groupTotal(String groupProperty, String valueProperty, Object i) {
        DataTable table = ((DataTableBindings)(FacesUtils.getManagedBean("dataTableBindings"))).getTable(this.getClass());
        // Fix for bugged method invocation in early TC7 releases
        int index = (Integer) i;

        double total = 0;
        boolean nextRowInGroup = false;
        FacesContext context = FacesContext.getCurrentInstance();
        Application application = context.getApplication();

        int currentIndex = table.getRowIndex();
        table.setRowIndex(index);

        Object groupValue = application.evaluateExpressionGet(context, "#{"+groupProperty+"}", Object.class);

        do {
            total += application.evaluateExpressionGet(context, "#{"+valueProperty+"}", Double.class);

            table.setRowIndex(--index);

            Object obj = application.evaluateExpressionGet(context, "#{"+groupProperty+"}", Object.class);
            if (table.isRowAvailable() && groupValue.equals(obj))
                nextRowInGroup = true;
            else
                nextRowInGroup = false;
        } while (nextRowInGroup);

        table.setRowIndex(currentIndex);
        return total;
    }
}
