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/*
 * Copyright (c) 2019 vitasystems GmbH and Hannover Medical School.
 *
 * This file is part of project EHRbase
 *
 * 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
 *
 *     https://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.ehrbase.aql.sql.binding;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.apache.commons.collections4.CollectionUtils;
import org.ehrbase.aql.compiler.OrderAttribute;
import org.ehrbase.aql.definition.I_VariableDefinition;
import org.jooq.Record;
import org.jooq.SelectQuery;
import org.jooq.SortField;
import org.jooq.impl.DSL;

/**
 * Created by christian on 9/23/2016.
 */
@SuppressWarnings({"java:S3776", "java:S3740", "java:S1452"})
public class OrderByBinder {

    private List orderAttributes;
    private final SelectQuery select;
    private final VariableDefinitions variableDefinitions;

    OrderByBinder(
            VariableDefinitions variableDefinitions, List orderAttributes, SelectQuery select) {
        this.orderAttributes = orderAttributes;
        this.select = select;
        this.variableDefinitions = variableDefinitions;
    }

    List> getOrderByFields() {
        if (orderAttributes.isEmpty()) return Collections.emptyList();

        List> orderFields = new ArrayList<>();

        for (OrderAttribute orderAttribute : orderAttributes) {
            SortField