/*
 * 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.lucene.queryparser.flexible.standard.nodes.intervalfn;

import java.util.List;
import java.util.Locale;
import java.util.Objects;
import java.util.stream.Collectors;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.queries.intervals.Intervals;
import org.apache.lucene.queries.intervals.IntervalsSource;

/** Node that represents {@link Intervals#ordered(IntervalsSource...)}. */
public class Ordered extends IntervalFunction {
  private final List<IntervalFunction> sources;

  public Ordered(List<IntervalFunction> sources) {
    this.sources = Objects.requireNonNull(sources);
  }

  @Override
  public IntervalsSource toIntervalSource(String field, Analyzer analyzer) {
    return Intervals.ordered(
        sources.stream()
            .map(intervalFunction -> intervalFunction.toIntervalSource(field, analyzer))
            .toArray(IntervalsSource[]::new));
  }

  @Override
  public String toString() {
    return String.format(
        Locale.ROOT,
        "fn:ordered(%s)",
        sources.stream().map(IntervalFunction::toString).collect(Collectors.joining(" ")));
  }
}
