package org.jboss.resteasy.test.providers.datasource;

import java.io.ByteArrayOutputStream;
import java.io.FilePermission;
import java.nio.file.DirectoryStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.PropertyPermission;
import java.util.concurrent.atomic.AtomicInteger;

import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.Entity;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

import org.jboss.arquillian.container.test.api.Deployment;
import org.jboss.arquillian.container.test.api.RunAsClient;
import org.jboss.arquillian.junit.Arquillian;
import org.jboss.logging.Logger;
import org.jboss.resteasy.test.providers.datasource.resource.ReadDataSourceTwiceCountTempFileResource;
import org.jboss.resteasy.spi.HttpResponseCodes;
import org.jboss.resteasy.utils.PermissionUtil;
import org.jboss.resteasy.utils.PortProviderUtil;
import org.jboss.resteasy.utils.TestUtil;
import org.jboss.shrinkwrap.api.Archive;
import org.jboss.shrinkwrap.api.spec.WebArchive;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;

/**
 * @tpSubChapter DataSource provider
 * @tpChapter Integration tests
 * @tpSince RESTEasy 3.0.16
 */
@RunWith(Arquillian.class)
@RunAsClient
public class ReadDataSourceTwiceCountTempFileTest {

   protected static final Logger logger = Logger.getLogger(ReadDataSourceTwiceCountTempFileResource.class.getName());

   static Client client;

   @Deployment
   public static Archive<?> deploy() {
      WebArchive war = TestUtil.prepareArchive(ReadDataSourceTwiceCountTempFileResource.class.getSimpleName());
      // DataSource provider creates tmp file in the filesystem
      war.addAsManifestResource(PermissionUtil.createPermissionsXmlAsset(new FilePermission("/tmp/-", "read"),
            new PropertyPermission("java.io.tmpdir", "read"),
            new FilePermission("/tmp", "read")), "permissions.xml");
      return TestUtil.finishContainerPrepare(war, null, ReadDataSourceTwiceCountTempFileResource.class);
   }

   @Before
   public void init() {
      client = ClientBuilder.newClient();
   }

   @After
   public void after() throws Exception {
      client.close();
   }

   private String generateURL(String path) {
      return PortProviderUtil.generateURL(path, ReadDataSourceTwiceCountTempFileResource.class.getSimpleName());
   }

   /**
    * @tpTestDetails Tests DataSourceProviders ability to read the same stream twice, consuming content of whole stream
    * before reading the second and verifies that no temporary file left after stream is closed
    * @tpInfo RESTEASY-1182
    * @tpSince RESTEasy 3.0.16
    */
   @Test
   public void testFileNotFound() throws Exception {
      WebTarget target = client.target(generateURL("/post"));

      //Count files initially
      int beginning = countTempFiles();

      ByteArrayOutputStream baos = new ByteArrayOutputStream(5000);
      for (int i = 0; i < 5000; i++) {
         baos.write(i);
      }
      Response response = target.request().post(Entity.entity(baos.toByteArray(), MediaType.APPLICATION_OCTET_STREAM));
      logger.info("The status of the response is " + response.getStatus());
      Assert.assertEquals(TestUtil.getErrorMessageForKnownIssue("JBEAP-2847"), HttpResponseCodes.SC_OK, response.getStatus());
      int counter = response.readEntity(int.class);
      int updated = countTempFiles();
      logger.info("counter from beginning (before request): " + beginning);
      logger.info("counter from server: " + counter);
      logger.info("counter updated: " + countTempFiles());
      Assert.assertTrue("The number of temporary files for datasource before and after request is not the same",
            counter > updated);
   }

   /**
    * @tpTestDetails Tests DataSourceProviders ability to read the same stream twice, consuming content of whole stream
    * before reading the second and verifies that no temporary file left after stream is closed. The request is send multiple
    * times and then number of files is verified
    * @tpInfo RESTEASY-1182
    * @tpSince RESTEasy 3.0.16
    */
   @Test
   public void testFileNotFoundMultipleRequests() throws Exception {
      WebTarget target = client.target(generateURL("/post"));
      ByteArrayOutputStream baos = new ByteArrayOutputStream(5000);
      for (int i = 0; i < 5000; i++) {
         baos.write(i);
      }
      Response response = target.request().post(Entity.entity(baos.toByteArray(), MediaType.APPLICATION_OCTET_STREAM));
      logger.info("The status of the response is " + response.getStatus());
      Assert.assertEquals(TestUtil.getErrorMessageForKnownIssue("JBEAP-2847"), HttpResponseCodes.SC_OK, response.getStatus());
      int counter = response.readEntity(int.class);

      response = target.request().post(Entity.entity(baos.toByteArray(), MediaType.APPLICATION_OCTET_STREAM));
      response.close();

      response = target.request().post(Entity.entity(baos.toByteArray(), MediaType.APPLICATION_OCTET_STREAM));
      response.close();

      response = target.request().post(Entity.entity(baos.toByteArray(), MediaType.APPLICATION_OCTET_STREAM));
      response.close();

      int updated = countTempFiles();
      logger.info("counter from server: " + counter);
      logger.info("counter updated: " + countTempFiles());
      Assert.assertTrue("The number of temporary files for datasource before and after request is not the same",
            counter > updated);
   }

   static int countTempFiles() throws Exception {
      String tmpdir = System.getProperty("java.io.tmpdir");
      Path dir = Paths.get(tmpdir);
      final AtomicInteger counter = new AtomicInteger(0);
      try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir, "resteasy-provider-datasource*")){
         stream.forEach(path -> counter.incrementAndGet());
      }
      return counter.intValue();
   }

   @AfterClass
   public static void afterclass() throws Exception {
      String tmpdir = System.getProperty("java.io.tmpdir");
      Path dir = Paths.get(tmpdir);
      try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir, "resteasy-provider-datasource*")) {
         stream.forEach(path -> logger.info(path.toString()));
      }
   }
}
