package eu.dnetlib.doiboost.orcid;

import static eu.dnetlib.dhp.common.SparkSessionSupport.runWithSparkSession;

import java.io.IOException;
import java.util.Optional;

import org.apache.commons.io.IOUtils;
import org.apache.spark.SparkConf;
import org.apache.spark.api.java.JavaRDD;
import org.apache.spark.api.java.JavaSparkContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import eu.dnetlib.dhp.application.ArgumentApplicationParser;

public class SparkPartitionLambdaFile {

	public static void main(String[] args) throws IOException, Exception {
		Logger logger = LoggerFactory.getLogger(SparkOrcidGenerateAuthors.class);

		final ArgumentApplicationParser parser = new ArgumentApplicationParser(
			IOUtils
				.toString(
					SparkOrcidGenerateAuthors.class
						.getResourceAsStream(
							"/eu/dnetlib/dhp/doiboost/gen_orcid_authors_parameters.json")));
		parser.parseArgument(args);
		Boolean isSparkSessionManaged = Optional
			.ofNullable(parser.get("isSparkSessionManaged"))
			.map(Boolean::valueOf)
			.orElse(Boolean.TRUE);
		final String workingPath = parser.get("workingPath");

		SparkConf conf = new SparkConf();
		runWithSparkSession(
			conf,
			isSparkSessionManaged,
			spark -> {
				JavaSparkContext sc = JavaSparkContext.fromSparkContext(spark.sparkContext());
				JavaRDD<String> lamdaFileRDD = sc.textFile(workingPath + "last_modified.csv");

				lamdaFileRDD
					.repartition(20)
					.saveAsTextFile(workingPath.concat("lamdafiles"));
			});
	}

}