package eu.dnetlib.dhp.provision.update;

import java.io.IOException;

import org.apache.commons.io.IOUtils;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;

import eu.dnetlib.dhp.provision.scholix.ScholixResource;

public class DataciteClient {

	private String host;
	private String index = "datacite";
	private String indexType = "dump";
	private final Datacite2Scholix d2s;

	public DataciteClient(String host) {
		this.host = host;

		d2s = new Datacite2Scholix(null);
		d2s.setRootPath("$._source.attributes");
	}

	public Iterable<String> getDatasetsFromTs(final Long timestamp) {
		return () -> {
			try {
				return new DataciteClientIterator(host, index, timestamp);
			} catch (IOException e) {
				throw new RuntimeException(e);
			}
		};
	}

	public String getHost() {
		return host;
	}

	public void setHost(String host) {
		this.host = host;
	}

	public String getIndex() {
		return index;
	}

	public void setIndex(String index) {
		this.index = index;
	}

	public String getIndexType() {
		return indexType;
	}

	public void setIndexType(String indexType) {
		this.indexType = indexType;
	}

	public ScholixResource getDatasetByDOI(final String doi) {
		try (CloseableHttpClient client = HttpClients.createDefault()) {
			HttpGet httpGet = new HttpGet(
				String
					.format(
						"http://%s:9200/%s/%s/%s", host, index, indexType, doi.replaceAll("/", "%2F")));
			CloseableHttpResponse response = client.execute(httpGet);
			final String json = IOUtils.toString(response.getEntity().getContent());
			return d2s.generateDataciteScholixResource(json);
		} catch (Throwable e) {
			return null;
		}
	}
}