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/*
 * Copyright (C) 2022 Dremio
 *
 * 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
 *
 * 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.projectnessie.versioned.transfer.files;

import static com.google.common.base.Preconditions.checkState;

import jakarta.annotation.Nonnull;
import java.io.BufferedInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Path;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import org.immutables.value.Value;

/** Nessie importer using data from a ZIP file. */
@Value.Immutable
public abstract class ZipArchiveImporter implements ImportFileSupplier {
  public static Builder builder() {
    return ImmutableZipArchiveImporter.builder();
  }

  public interface Builder {
    Builder sourceZipFile(Path sourceZipFile);

    ZipArchiveImporter build();
  }

  abstract Path sourceZipFile();

  @Value.Lazy
  ZipFile zipFile() throws IOException {
    return new ZipFile(sourceZipFile().toFile());
  }

  @Override
  @Nonnull
  public InputStream newFileInput(@Nonnull String fileName) throws IOException {
    @SuppressWarnings("resource")
    ZipFile zip = zipFile();
    ZipEntry entry = zip.getEntry(fileName);
    if (entry == null) {
      throw new FileNotFoundException(fileName);
    }
    checkState(!entry.isDirectory(), "%s is a directory, expect a file", fileName);
    return new BufferedInputStream(zip.getInputStream(entry));
  }

  @Override
  public void close() throws IOException {
    zipFile().close();
  }
}