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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.io;

import java.util.Collections;
import java.util.List;
import java.util.Objects;
import java.util.stream.Collectors;

/** Newly created data files and changelog files. */
public class NewFilesIncrement {

    private final List newFiles;
    private final List changelogFiles;

    public NewFilesIncrement(List newFiles, List changelogFiles) {
        this.newFiles = newFiles;
        this.changelogFiles = changelogFiles;
    }

    public static NewFilesIncrement emptyIncrement() {
        return new NewFilesIncrement(Collections.emptyList(), Collections.emptyList());
    }

    public List newFiles() {
        return newFiles;
    }

    public List changelogFiles() {
        return changelogFiles;
    }

    public boolean isEmpty() {
        return newFiles.isEmpty() && changelogFiles.isEmpty();
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        NewFilesIncrement that = (NewFilesIncrement) o;
        return Objects.equals(newFiles, that.newFiles)
                && Objects.equals(changelogFiles, that.changelogFiles);
    }

    @Override
    public int hashCode() {
        return Objects.hash(newFiles, changelogFiles);
    }

    @Override
    public String toString() {
        return String.format(
                "NewFilesIncrement {newFiles = [\n%s\n], changelogFiles = [\n%s\n]}",
                newFiles.stream().map(DataFileMeta::fileName).collect(Collectors.joining(",\n")),
                changelogFiles.stream()
                        .map(DataFileMeta::fileName)
                        .collect(Collectors.joining(",\n")));
    }
}