package eu.dnetlib.ariadneplus.workflows.nodes;

import com.google.common.base.Splitter;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.gson.Gson;
import eu.dnetlib.enabling.resultset.client.ResultSetClient;
import eu.dnetlib.msro.workflows.graph.Arc;
import eu.dnetlib.msro.workflows.nodes.AsyncJobNode;
import eu.dnetlib.msro.workflows.procs.Env;
import eu.dnetlib.msro.workflows.procs.Token;
import eu.dnetlib.msro.workflows.util.ResultsetProgressProvider;
import eu.dnetlib.msro.workflows.util.WorkflowsConstants;
import eu.dnetlib.rmi.common.ResultSet;
import eu.dnetlib.rmi.manager.MSROException;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicNameValuePair;
import org.springframework.beans.factory.annotation.Autowired;

import java.io.IOException;
import java.net.ConnectException;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;


public class EnrichGraphDBContentJobNode extends AsyncJobNode {

	private static final Log log = LogFactory.getLog(EnrichGraphDBContentJobNode.class);

	private String sparqlUpdateQuery;
	private String publisherEndpoint;
	private String datasourceInterface;
	private String datasource;

	//for parallel requests to the publisher endpoint
	private int nThreads = 1;

	@Override
	protected String execute(final Env env) throws Exception {

		int statusCode = -1;
		String enrichResult = "";
		PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
		cm.setMaxTotal(nThreads);
		CloseableHttpClient client = HttpClients.custom().setConnectionManager(cm).build();
		log.info("Enrich endpoint: " + getEnrichEndpoint());
		CloseableHttpResponse responsePOST = null;
		String queryValue = getSparqlUpdateQuery();
		int countQueries = 0;
		int countSuccess = 0;
		String endpoint = getEnrichEndpoint();
		for(String query : Splitter.on(";").split(queryValue)){
			if (StringUtils.isNoneBlank(query)) {
				countQueries++;
				HttpPost post = new HttpPost(endpoint);
				StringEntity entity = new StringEntity(query);
				post.setEntity(entity);
				responsePOST = client.execute(post);
				statusCode = responsePOST.getStatusLine().getStatusCode();
				switch (statusCode) {
					case 200:
						log.info(String.format("Query %d executed: %s", countQueries, query));
						break;
					default:
						log.error("error enriching graphDB  " + responsePOST.getStatusLine().getStatusCode() + ": " + responsePOST.getStatusLine().getReasonPhrase());
						throw new MSROException(String.format("Cannot execute sparql from %s", query));
				}
				countSuccess++;
			}
		}
		enrichResult = String.format("Queries committed with success %d/%d", countSuccess, countQueries);
		log.info(enrichResult);
		if(responsePOST != null) responsePOST.close();
		client.close();
		cm.shutdown();
		env.setAttribute(WorkflowsConstants.MAIN_LOG_PREFIX + "enrichResult", enrichResult);
		return Arc.DEFAULT_ARC;
	}

	public String getPublisherEndpoint() {
		return publisherEndpoint;
	}
	
	private String getEnrichEndpoint() {
		return publisherEndpoint.concat("/updateSparql");
	}

	public void setPublisherEndpoint(final String publisherEndpoint) {
		this.publisherEndpoint = publisherEndpoint;
	}

	public String getDatasourceInterface() {
		return datasourceInterface;
	}

	public void setDatasourceInterface(String datasourceInterface) {
		this.datasourceInterface = datasourceInterface;
	}

	public String getDatasource() {
		return datasource;
	}

	public void setDatasource(String datasource) {
		this.datasource = datasource;
	}

	public String getSparqlUpdateQuery() {
		return sparqlUpdateQuery;
	}

	public void setSparqlUpdateQuery(String sparqlUpdateQuery) {
		this.sparqlUpdateQuery = sparqlUpdateQuery;
	}
}