package ca.uhn.fhir.rest.server;

import ca.uhn.fhir.context.FhirContext;
import ca.uhn.fhir.rest.annotation.Search;
import ca.uhn.fhir.rest.annotation.Sort;
import ca.uhn.fhir.rest.api.SortOrderEnum;
import ca.uhn.fhir.rest.api.SortSpec;
import ca.uhn.fhir.test.utilities.JettyUtil;
import ca.uhn.fhir.util.TestUtil;
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.instance.model.api.IBaseResource;
import org.hl7.fhir.r4.model.HumanName;
import org.hl7.fhir.r4.model.Patient;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;

import static org.junit.jupiter.api.Assertions.assertEquals;

public class SearchSortR4Test {

	private static CloseableHttpClient ourClient;
	private static FhirContext ourCtx = FhirContext.forR4();
	private static final org.slf4j.Logger ourLog = org.slf4j.LoggerFactory.getLogger(SearchSortR4Test.class);
	private static int ourPort;
	private static Server ourServer;
	private static String ourLastMethod;
	private static SortSpec ourLastSortSpec;

	@BeforeEach
	public void before() {
		ourLastMethod = null;
		ourLastSortSpec = null;
	}

	@Test
	public void testSearch() throws Exception {
		HttpGet httpGet = new HttpGet("http://localhost:" + ourPort + "/Patient?_sort=param1,-param2,param3,-param4");
		CloseableHttpResponse status = ourClient.execute(httpGet);
		try {
			String responseContent = IOUtils.toString(status.getEntity().getContent());
			ourLog.info(responseContent);
			assertEquals(200, status.getStatusLine().getStatusCode());
			assertEquals("search", ourLastMethod);

			assertEquals("param1", ourLastSortSpec.getParamName());
			assertEquals(SortOrderEnum.ASC, ourLastSortSpec.getOrder());

			assertEquals("param2", ourLastSortSpec.getChain().getParamName());
			assertEquals(SortOrderEnum.DESC, ourLastSortSpec.getChain().getOrder());

			assertEquals("param3", ourLastSortSpec.getChain().getChain().getParamName());
			assertEquals(SortOrderEnum.ASC, ourLastSortSpec.getChain().getChain().getOrder());

			assertEquals("param4", ourLastSortSpec.getChain().getChain().getChain().getParamName());
			assertEquals(SortOrderEnum.DESC, ourLastSortSpec.getChain().getChain().getChain().getOrder());

		} finally {
			IOUtils.closeQuietly(status.getEntity().getContent());
		}

	}

	@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.setPagingProvider(new FifoMemoryPagingProvider(10));

		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;
		}

		//@formatter:off
		@SuppressWarnings("rawtypes")
		@Search()
		public List search(
				@Sort SortSpec theSortSpec
				) {
			ourLastMethod = "search";
			ourLastSortSpec = theSortSpec;
			ArrayList<Patient> retVal = new ArrayList<Patient>();
			for (int i = 1; i < 100; i++) {
				retVal.add((Patient) new Patient().addName(new HumanName().setFamily("FAMILY")).setId("" + i));
			}
			return retVal;
		}
		//@formatter:on

	}

}
