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/*
 *
 *  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.dinky.shaded.paimon.utils;

import org.dinky.shaded.paimon.CoreOptions;
import org.dinky.shaded.paimon.options.Options;
import org.dinky.shaded.paimon.statistics.FieldStatsCollector;

import java.util.List;

import static org.dinky.shaded.paimon.CoreOptions.FIELDS_PREFIX;
import static org.dinky.shaded.paimon.CoreOptions.STATS_MODE_SUFFIX;
import static org.dinky.shaded.paimon.options.ConfigOptions.key;

/** The stats utils to create {@link FieldStatsCollector.Factory}s. */
public class StatsCollectorFactories {

    public static FieldStatsCollector.Factory[] createStatsFactories(
            CoreOptions options, List fields) {
        Options cfg = options.toConfiguration();
        FieldStatsCollector.Factory[] modes = new FieldStatsCollector.Factory[fields.size()];
        for (int i = 0; i < fields.size(); i++) {
            String fieldMode =
                    cfg.get(
                            key(String.format(
                                            "%s.%s.%s",
                                            FIELDS_PREFIX, fields.get(i), STATS_MODE_SUFFIX))
                                    .stringType()
                                    .noDefaultValue());
            if (fieldMode != null) {
                modes[i] = FieldStatsCollector.from(fieldMode);
            } else {
                modes[i] = FieldStatsCollector.from(cfg.get(CoreOptions.METADATA_STATS_MODE));
            }
        }
        return modes;
    }
}