/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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.apache.causeway.viewer.wicket.model.models.interaction.coll;

import java.util.Optional;

import org.apache.wicket.model.ChainingModel;
import org.apache.wicket.model.IModel;

import org.apache.causeway.core.metamodel.tabular.DataRow;
import org.apache.causeway.core.metamodel.tabular.DataTableInteractive;

import lombok.Getter;

public class DataRowWkt
extends ChainingModel<DataRow> {

    private static final long serialVersionUID = 1L;

    public static DataRowWkt chain(
            final IModel<DataTableInteractive> dataTableModelHolder,
            final DataRow dataRow) {
        return new DataRowWkt(dataTableModelHolder, dataRow);
    }

    @Getter private final int rowIndex;

    private DataRowWkt(
            final IModel<DataTableInteractive> dataTableModelHolder,
            final DataRow dataRow) {
        super(dataTableModelHolder);
        this.rowIndex = dataRow.getRowIndex();
    }

    @Override
    public final DataRow getObject() {
        return dataRow().orElse(null);
    }

    public Optional<DataRow> dataRow() {
        return dataTableModel().lookupDataRow(rowIndex);
    }

    public boolean hasMemoizedDataRow() {
        return ((DataTableModelWkt) super.getTarget()).isAttached();
    }

    // -- HELPER

    private DataTableInteractive dataTableModel() {
        return ((DataTableModelWkt) super.getTarget()).getObject();
    }

}
