/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

/*

 * @test

 * @bug 8153142

 * @modules jdk.incubator.httpclient

 *          jdk.httpserver

 * @run testng/othervm HeadersTest1

 */

import java.io.IOException;

import java.io.OutputStream;

import java.net.InetSocketAddress;

import java.net.URI;

import jdk.incubator.http.HttpClient;

import jdk.incubator.http.HttpHeaders;

import jdk.incubator.http.HttpRequest;

import jdk.incubator.http.HttpResponse;

import java.util.HashSet;

import java.util.List;

import java.util.Map;

import java.util.Set;

import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

import com.sun.net.httpserver.Headers;

import com.sun.net.httpserver.HttpExchange;

import com.sun.net.httpserver.HttpHandler;

import com.sun.net.httpserver.HttpServer;

import org.testng.annotations.Test;

import static jdk.incubator.http.HttpResponse.BodyHandler.asString;

import static java.nio.charset.StandardCharsets.US_ASCII;

import static org.testng.Assert.assertEquals;

import static org.testng.Assert.assertNotNull;

import static org.testng.Assert.assertTrue;

public class HeadersTest1 {

    private static final String RESPONSE = "Hello world";

    @Test

    public void test() throws Exception {

        HttpServer server = HttpServer.create(new InetSocketAddress(0), 10);

        Handler h = new Handler();

        server.createContext("/test", h);

        int port = server.getAddress().getPort();

        System.out.println("Server port = " + port);

        ExecutorService e = Executors.newCachedThreadPool();

        server.setExecutor(e);

        server.start();

        HttpClient client = HttpClient.newBuilder()

                                      .executor(e)

                                      .build();

        try {

            URI uri = new URI("http://127.0.0.1:" + Integer.toString(port) + "/test/foo");

            HttpRequest req = HttpRequest.newBuilder(uri)

                                         .headers("X-Bar", "foo1")

                                         .headers("X-Bar", "foo2")

                                         .GET()

                                         .build();

            HttpResponse<?> resp = client.send(req, asString());

            if (resp.statusCode() != 200) {

                throw new RuntimeException("Expected 200, got: " + resp.statusCode());

            }

            HttpHeaders hd = resp.headers();

            assertTrue(!hd.firstValue("Non-Existent-Header").isPresent());

            List<String> v1 = hd.allValues("Non-Existent-Header");

            assertNotNull(v1);

            assertTrue(v1.isEmpty(), String.valueOf(v1));

            TestKit.assertUnmodifiableList(v1);

            List<String> v2 = hd.allValues("X-Foo-Response");

            assertNotNull(v2);

            assertEquals(new HashSet<>(v2), Set.of("resp1", "resp2"));

            TestKit.assertUnmodifiableList(v2);

            Map<String, List<String>> map = hd.map();

            TestKit.assertUnmodifiableMap(map);

            for (List<String> values : map.values()) {

                TestKit.assertUnmodifiableList(values);

            }

        } finally {

            server.stop(0);

            e.shutdownNow();

        }

        System.out.println("OK");

    }

    private static final class Handler implements HttpHandler {

        @Override

        public void handle(HttpExchange he) throws IOException {

            List<String> l = he.getRequestHeaders().get("X-Bar");

            if (!l.contains("foo1") || !l.contains("foo2")) {

                for (String s : l) {

                    System.out.println("HH: " + s);

                }

                he.sendResponseHeaders(500, -1);

                he.close();

                return;

            }

            Headers h = he.getResponseHeaders();

            h.add("X-Foo-Response", "resp1");

            h.add("X-Foo-Response", "resp2");

            he.sendResponseHeaders(200, RESPONSE.length());

            OutputStream os = he.getResponseBody();

            os.write(RESPONSE.getBytes(US_ASCII));

            os.close();

        }

    }

}