package eu.dnetlib.dhp.oa.graph.dump.country;

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

import java.io.Serializable;
import java.util.*;

import javax.rmi.CORBA.Util;

import org.apache.commons.io.IOUtils;
import org.apache.spark.SparkConf;
import org.apache.spark.api.java.function.FilterFunction;
import org.apache.spark.api.java.function.MapFunction;
import org.apache.spark.sql.Dataset;
import org.apache.spark.sql.Encoders;
import org.apache.spark.sql.SaveMode;
import org.apache.spark.sql.SparkSession;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.gson.Gson;
import com.jayway.jsonpath.DocumentContext;
import com.jayway.jsonpath.JsonPath;

import eu.dnetlib.dhp.application.ArgumentApplicationParser;
import eu.dnetlib.dhp.oa.graph.dump.Constants;
import eu.dnetlib.dhp.oa.graph.dump.ResultMapper;
import eu.dnetlib.dhp.oa.graph.dump.Utils;
import eu.dnetlib.dhp.oa.graph.dump.subset.MasterDuplicate;
import eu.dnetlib.dhp.oa.graph.dump.subset.SparkDumpResult;
import eu.dnetlib.dhp.oa.graph.dump.subset.criteria.VerbResolver;
import eu.dnetlib.dhp.oa.graph.dump.subset.criteria.VerbResolverFactory;
import eu.dnetlib.dhp.oa.graph.dump.subset.selectionconstraints.Param;
import eu.dnetlib.dhp.oa.graph.dump.subset.selectionconstraints.SelectionConstraints;
import eu.dnetlib.dhp.oa.model.graph.GraphResult;
import eu.dnetlib.dhp.schema.oaf.DataInfo;
import eu.dnetlib.dhp.schema.oaf.KeyValue;
import scala.Tuple2;

/**
 * @author miriam.baglioni
 * @Date 27/04/23
 * Selects the results having in the country the given country
 */
public class SparkFindResultWithCountry implements Serializable {
	private static final Logger log = LoggerFactory.getLogger(SparkFindResultWithCountry.class);

	public static final String COMPRESSION = "compression";
	public static final String GZIP = "gzip";

	public static void main(String[] args) throws Exception {
		String jsonConfiguration = IOUtils
			.toString(
				SparkFindResultWithCountry.class
					.getResourceAsStream(
						"/eu/dnetlib/dhp/oa/graph/dump/result_country_parameters.json"));

		final ArgumentApplicationParser parser = new ArgumentApplicationParser(jsonConfiguration);
		parser.parseArgument(args);

		Boolean isSparkSessionManaged = Optional
			.ofNullable(parser.get("isSparkSessionManaged"))
			.map(Boolean::valueOf)
			.orElse(Boolean.TRUE);
		log.info("isSparkSessionManaged: {}", isSparkSessionManaged);

		final String inputPath = parser.get("sourcePath");
		log.info("inputPath: {}", inputPath);

		final String outputPath = parser.get("outputPath");
		log.info("outputPath: {}", outputPath);

		final String resultType = parser.get("resultType");
		log.info("resultType: {}", resultType);

		final String resultClassName = parser.get("resultTableName");
		log.info("resultTableName: {}", resultClassName);

		final String preparedInfoPath = parser.get("resultWithCountry");

		Class<? extends eu.dnetlib.dhp.schema.oaf.Result> inputClazz = (Class<? extends eu.dnetlib.dhp.schema.oaf.Result>) Class
			.forName(resultClassName);

		run(
			isSparkSessionManaged, inputPath, outputPath, inputClazz,
			resultType, preparedInfoPath);

	}

	private static void run(Boolean isSparkSessionManaged, String inputPath, String outputPath,

		Class<? extends eu.dnetlib.dhp.schema.oaf.Result> inputClazz, String resultType, String preparedInfoPath) {
		SparkConf conf = new SparkConf();

		runWithSparkSession(
			conf,
			isSparkSessionManaged,
			spark -> {
				Utils.removeOutputDir(spark, outputPath + "/original/" + resultType);

				resultDump(
					spark, inputPath, outputPath, inputClazz, resultType, preparedInfoPath);
			});

	}

	public static <I extends eu.dnetlib.dhp.schema.oaf.Result> void resultDump(
		SparkSession spark,
		String inputPath,
		String outputPath,
		Class<I> inputClazz,

		String resultType,

		String preparedInfoPath) {

		Dataset<String> resultsWithCountry = spark.read().textFile(preparedInfoPath).distinct();

		Dataset<I> result = Utils
			.readPath(spark, inputPath, inputClazz)
			.filter(
				(FilterFunction<I>) r -> !r.getDataInfo().getInvisible() && !r.getDataInfo().getDeletedbyinference());

		resultsWithCountry
			.joinWith(result, resultsWithCountry.col("value").equalTo(result.col("id")))
			.map((MapFunction<Tuple2<String, I>, I>) t2 -> t2._2(), Encoders.bean(inputClazz))
			.write()
			.mode(SaveMode.Overwrite)
			.option("compression", "gzip")
			.json(outputPath + "/original/" + resultType);

	}

}