package eu.dnetlib.ariadneplus.workflows.nodes;

import com.google.common.collect.Lists;
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.util.WorkflowsConstants;
import eu.dnetlib.rmi.manager.MSROException;
import org.apache.commons.io.IOUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.config.SocketConfig;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.io.InputStream;
import java.net.ConnectException;
import java.net.URI;
import java.util.List;


public class IndexOnESJobNode extends AsyncJobNode {

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

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

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

		int statusCode = -1;
		String response = "";
//		String indexOnESResult = "noResult";
//		log.info("Publisher endpoint: " + getPublisherEndpoint());
//		SocketConfig socketConfig = SocketConfig.custom().setSoKeepAlive(true).build();
//		CloseableHttpClient client = HttpClientBuilder.create()
//				.setDefaultSocketConfig(socketConfig).build();
		log.info("IndexOnES endpoint: " + getIndexOnESEndpoint());
//		CloseableHttpResponse responsePOST = null;
		HttpClient client = null;
		try {
//			HttpPost post = new HttpPost(getIndexOnESEndpoint());
//			List<NameValuePair> params = Lists.newArrayList();
			String[] splits = getDatasourceInterface().split("::");
			String datasource = splits[2];
			String collectionId = splits[3];
//			params.add(new BasicNameValuePair("datasource", datasource));
//			params.add(new BasicNameValuePair("collectionId", collectionId));
//			UrlEncodedFormEntity ent =  new UrlEncodedFormEntity(params, "UTF-8");
//			post.setEntity(ent);
//			log.info("Calling IndexOnES endpoint with params: "+getDatasource()+" "+getDatasourceInterface());
//			responsePOST = client.execute(post);

			URI getURI = new URIBuilder(getIndexOnESEndpoint())
					.addParameter("datasource",  datasource)
					.addParameter("collectionId",  collectionId)
					.build();
			client = HttpClients.createDefault();
			HttpResponse res = client.execute(new HttpGet(getURI));
			response = EntityUtils.toString(res.getEntity());
			if (res.getStatusLine()!=null) {
				statusCode = res.getStatusLine().getStatusCode();
			}

//			statusCode = responsePOST.getStatusLine().getStatusCode();
//			try(InputStream responseBody = responsePOST.getEntity().getContent()) {
//				indexOnESResult = IOUtils.toString(responseBody, "UTF-8");
//			} catch (Exception e) {
//				log.error(e);
//			}
//			switch (statusCode) {
//			case 200:
//				log.info("index on ES completed");
//				break;
//			default:
//				log.error("error indexing on ES  " + responsePOST.getStatusLine().getStatusCode() + ": " + responsePOST.getStatusLine().getReasonPhrase());
//				break;
//			}
		}
//		catch (ConnectException ce) {
//			log.error(ce);
//			throw new MSROException("Unable to connect to Publisher endpoint" + getIndexOnESEndpoint());
//		}
//		catch (IOException e) {
//			log.error(e);
//			throw new MSROException("IO Error" + getIndexOnESEndpoint());
//		}
		catch (Throwable t) {
			log.error(t);
			throw new MSROException("Indexing on Elastic Search: " + t.getMessage());
		}

		finally{
//			if(responsePOST != null) responsePOST.close();
//			client.close();
//			cm.shutdown();

		}

		env.setAttribute(WorkflowsConstants.MAIN_LOG_PREFIX + "statusCode", Integer.toString(statusCode));
//		env.setAttribute(WorkflowsConstants.MAIN_LOG_PREFIX + "indexResult", indexOnESResult);

		env.setAttribute(WorkflowsConstants.MAIN_LOG_PREFIX + "response", response);

		if (statusCode!=200) {
			throw new MSROException("Error from Publisher endpoint [ status code: " + statusCode + " ]");
		}

		return Arc.DEFAULT_ARC;
	}

	public String getPublisherEndpoint() {
		return publisherEndpoint;
	}
	
	private String getIndexOnESEndpoint() {
		return publisherEndpoint.concat("/indexOnES");
	}

	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;
	}

}