package ca.uhn.hapi.converters.server;

import ca.uhn.fhir.context.FhirContext;
import ca.uhn.fhir.rest.annotation.Search;
import ca.uhn.fhir.rest.api.EncodingEnum;
import ca.uhn.fhir.rest.server.IResourceProvider;
import ca.uhn.fhir.rest.server.RestfulServer;
import ca.uhn.fhir.test.utilities.JettyUtil;
import ca.uhn.fhir.util.TestUtil;
import ca.uhn.fhir.util.UrlUtil;
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.HttpClientBuilder;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.servlet.ServletHandler;
import org.eclipse.jetty.servlet.ServletHolder;
import org.hl7.fhir.dstu3.model.HumanName;
import org.hl7.fhir.dstu3.model.Patient;
import org.hl7.fhir.instance.model.api.IBaseResource;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;

import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;

import static org.hamcrest.CoreMatchers.containsString;
import static org.hamcrest.MatcherAssert.assertThat;

public class VersionedApiConverterInterceptorR4Test {

	private static final org.slf4j.Logger ourLog = org.slf4j.LoggerFactory.getLogger(VersionedApiConverterInterceptorR4Test.class);
	private static CloseableHttpClient ourClient;
	private static FhirContext ourCtx = FhirContext.forDstu3();
	private static int ourPort;

	private static Server ourServer;


	@Test
	public void testSearchNormal() throws Exception {
		HttpGet httpGet = new HttpGet("http://localhost:" + ourPort + "/Patient");
		try (CloseableHttpResponse status = ourClient.execute(httpGet)) {
			String responseContent = IOUtils.toString(status.getEntity().getContent(), StandardCharsets.UTF_8);
			ourLog.info(responseContent);
			assertThat(responseContent, containsString("\"family\": \"FAMILY\""));
		}
	}

	@Test
	public void testSearchConvertToR2() throws Exception {
		HttpGet httpGet = new HttpGet("http://localhost:" + ourPort + "/Patient");
		httpGet.addHeader("Accept", "application/fhir+json; fhirVersion=1.0");
		try (CloseableHttpResponse status = ourClient.execute(httpGet)) {
			String responseContent = IOUtils.toString(status.getEntity().getContent(), StandardCharsets.UTF_8);
			ourLog.info(responseContent);
			assertThat(responseContent, containsString("\"family\": ["));
		}
	}

	@Test
	public void testSearchConvertToR2ByFormatParam() throws Exception {
		HttpGet httpGet = new HttpGet("http://localhost:" + ourPort + "/Patient?_format=" + UrlUtil.escapeUrlParam("application/fhir+json; fhirVersion=1.0"));
		try (CloseableHttpResponse status = ourClient.execute(httpGet)) {
			String responseContent = IOUtils.toString(status.getEntity().getContent(), StandardCharsets.UTF_8);
			ourLog.info(responseContent);
			assertThat(responseContent, containsString("\"family\": ["));
		}
	}

	@AfterAll
	public static void afterClassClearContext() throws Exception {
		JettyUtil.closeServer(ourServer);
		TestUtil.clearAllStaticFieldsForUnitTest();
	}

	@BeforeAll
	public static void beforeClass() throws Exception {
		ourServer = new Server(0);

		DummyPatientResourceProvider patientProvider = new DummyPatientResourceProvider();

		ServletHandler proxyHandler = new ServletHandler();
		RestfulServer servlet = new RestfulServer(ourCtx);
		servlet.setDefaultResponseEncoding(EncodingEnum.JSON);
		servlet.setDefaultPrettyPrint(true);
		servlet.registerInterceptor(new VersionedApiConverterInterceptor());

		servlet.setResourceProviders(patientProvider);
		ServletHolder servletHolder = new ServletHolder(servlet);
		proxyHandler.addServletWithMapping(servletHolder, "/*");
		ourServer.setHandler(proxyHandler);
		JettyUtil.startServer(ourServer);
        ourPort = JettyUtil.getPortForStartedServer(ourServer);

		PoolingHttpClientConnectionManager connectionManager = new PoolingHttpClientConnectionManager(5000, TimeUnit.MILLISECONDS);
		HttpClientBuilder builder = HttpClientBuilder.create();
		builder.setConnectionManager(connectionManager);
		ourClient = builder.build();

	}

	public static class DummyPatientResourceProvider implements IResourceProvider {

		@Override
		public Class<? extends IBaseResource> getResourceType() {
			return Patient.class;
		}

		@SuppressWarnings("rawtypes")
		@Search()
		public List search() {
			ArrayList<Patient> retVal = new ArrayList<>();

			Patient patient = new Patient();
			patient.getIdElement().setValue("Patient/A");
			patient.addName(new HumanName().setFamily("FAMILY"));
			retVal.add(patient);

			return retVal;
		}

	}

}
