package org.gcube.datatransfer.test;
import java.io.BufferedInputStream;
import java.io.InputStream;

import org.apache.http.HttpResponse;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.impl.client.HttpClientBuilder;
import org.gcube.common.encryption.StringEncrypter;
import org.gcube.common.resources.gcore.ServiceEndpoint.AccessPoint;
import org.gcube.datatransfer.resolver.services.WekeoResolver;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * The Class WekeoResolverTest.
 *
 * @author Francesco Mangiacrapa at ISTI-CNR francesco.mangiacrapa@isti.cnr.it
 * 
 *         Mar 31, 2021
 */
public class WekeoResolverTest {

	private static Logger logger = LoggerFactory.getLogger(WekeoResolverTest.class);

	private final static String RUNTIME_WKEO_RESOURCE_NAME = "WekeoDataBroker";

	public static final String scope = "/gcube/devsec/devVRE";

	public static void main(String[] args) {

		try {

			logger.info("starts...");
			String wekeoToken = null;

			AccessPoint wekeoAccessPoint = WekeoResolver.readWekeoServiceEndpoint(null, scope);

			if (wekeoAccessPoint != null) {

				String wekeoUsername = wekeoAccessPoint.username();
				String wekeoAddress = wekeoAccessPoint.address();
				String wekeoPwd = wekeoAccessPoint.password();

				// printing the access point found
				if (logger.isDebugEnabled()) {
					String msg = String.format("Found the username %s and the address %s to perform the request",
							wekeoUsername, wekeoAddress);
					logger.debug(msg);
				}

				// decrypting the pwd
				if (wekeoPwd != null) {
					wekeoPwd = StringEncrypter.getEncrypter().decrypt(wekeoAccessPoint.password());
					logger.info("Returning decrypted pwd registered into " + RUNTIME_WKEO_RESOURCE_NAME + " SE: "
							+ wekeoPwd.substring(0, wekeoPwd.length() / 2) + "....");
				}

				if (wekeoUsername != null && wekeoPwd != null & wekeoAddress != null) {

					try {
						// performing the HTTP request with Basic Authentication
						CredentialsProvider provider = new BasicCredentialsProvider();
						UsernamePasswordCredentials credentials = new UsernamePasswordCredentials(wekeoUsername,
								wekeoPwd);
						provider.setCredentials(AuthScope.ANY, credentials);

						HttpClient client = HttpClientBuilder.create().setDefaultCredentialsProvider(provider).build();
						logger.info("calling the URL and performing basic authentication to: " + wekeoAddress);
						HttpResponse response = client.execute(new HttpGet(wekeoAddress));
						int statusCode = response.getStatusLine().getStatusCode();
						logger.info("the response stus code is: " + statusCode);
						if (statusCode == 200) {
							InputStream is = response.getEntity().getContent();
							BufferedInputStream bif = new BufferedInputStream(is);
							wekeoToken = bif.toString();
							logger.info("got the wekeo token: " + wekeoToken.substring(0, wekeoToken.length() / 2)
									+ "....");
						} else {
							String error = String.format("The request to %s returned status code %d", wekeoAddress,
									statusCode);
							throw new Exception(error);
						}
					} catch (Exception e) {
						String error = String.format("Error on performing request to %s", wekeoAddress);
						throw new Exception(error);
					}

				} else {
					String error = String.format(
							"I cannot read the configurations (adress, username,password) from %s in the scope %s",
							RUNTIME_WKEO_RESOURCE_NAME, scope);
					throw new Exception(error);
				}
			}

			// to be sure
			if (wekeoToken == null) {
				String error = String
						.format("Sorry an rrror occured on getting the wekeo token. Please, retry the request");
				throw new Exception(error);
			}

		} catch (Exception e) {
			logger.error(e.getMessage(), e);
		}

	}

}