/*
 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
 * 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
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * @test
 * @summary HttpRequest[.Builder] API and behaviour checks
 * @run testng RequestBuilderTest
 */

import java.net.URI;
import java.util.List;
import jdk.incubator.http.HttpRequest;
import static java.time.Duration.ofNanos;
import static java.time.Duration.ofMinutes;
import static java.time.Duration.ofSeconds;
import static java.time.Duration.ZERO;
import static jdk.incubator.http.HttpClient.Version.HTTP_1_1;
import static jdk.incubator.http.HttpClient.Version.HTTP_2;
import static jdk.incubator.http.HttpRequest.BodyPublisher.fromString;
import static jdk.incubator.http.HttpRequest.noBody;
import static jdk.incubator.http.HttpRequest.newBuilder;
import static org.testng.Assert.*;
import org.testng.annotations.Test;

public class RequestBuilderTest {

    static final URI uri = URI.create("http://foo.com/");
    static final Class<NullPointerException> NPE = NullPointerException.class;
    static final Class<IllegalArgumentException> IAE = IllegalArgumentException.class;
    static final Class<IllegalStateException> ISE = IllegalStateException.class;
    static final Class<NumberFormatException> NFE = NumberFormatException.class;
    static final Class<UnsupportedOperationException> UOE = UnsupportedOperationException.class;

    @Test
    public void testDefaults() {
        List<HttpRequest.Builder> builders = List.of(newBuilder().uri(uri),
                                                     newBuilder(uri));
        for (HttpRequest.Builder builder : builders) {
            assertFalse(builder.build().expectContinue());
            assertEquals(builder.build().method(), "GET");
            assertFalse(builder.build().bodyPublisher().isPresent());
            assertFalse(builder.build().version().isPresent());
            assertFalse(builder.build().timeout().isPresent());
            assertTrue(builder.build().headers() != null);
            assertEquals(builder.build().headers().map().size(), 0);
        }
    }

    @Test
    public void testNull() {
        HttpRequest.Builder builder = newBuilder();

        assertThrows(NPE, () -> newBuilder(null).build());
        assertThrows(NPE, () -> newBuilder(uri).uri(null).build());
        assertThrows(NPE, () -> builder.uri(null));
        assertThrows(NPE, () -> builder.version(null));
        assertThrows(NPE, () -> builder.header(null, null));
        assertThrows(NPE, () -> builder.header("name", null));
        assertThrows(NPE, () -> builder.header(null, "value"));
        assertThrows(NPE, () -> builder.headers(null));
        assertThrows(NPE, () -> builder.headers(new String[] { null, null }));
        assertThrows(NPE, () -> builder.headers(new String[] { "name", null }));
        assertThrows(NPE, () -> builder.headers(new String[] { null, "value" }));
        assertThrows(NPE, () -> builder.method(null, null));
        assertThrows(NPE, () -> builder.method("GET", null));
        assertThrows(NPE, () -> builder.method("POST", null));
        assertThrows(NPE, () -> builder.method("PUT", null));
        assertThrows(NPE, () -> builder.method("DELETE", null));
        assertThrows(NPE, () -> builder.setHeader(null, null));
        assertThrows(NPE, () -> builder.setHeader("name", null));
        assertThrows(NPE, () -> builder.setHeader(null, "value"));
        assertThrows(NPE, () -> builder.timeout(null));
        assertThrows(NPE, () -> builder.DELETE(null));
        assertThrows(NPE, () -> builder.POST(null));
        assertThrows(NPE, () -> builder.PUT(null));
    }

    @Test
    public void testURI() {
        assertThrows(ISE, () -> newBuilder().build());
        List<URI> uris = List.of(
                URI.create("ws://foo.com"),
                URI.create("wss://foo.com"),
                URI.create("ftp://foo.com"),
                URI.create("gopher://foo.com"),
                URI.create("mailto:a@b.com"),
                URI.create("scheme:example.com"),
                URI.create("scheme:example.com"),
                URI.create("scheme:example.com/path"),
                URI.create("path"),
                URI.create("/path")
        );
        for (URI u : uris) {
            assertThrows(IAE, () -> newBuilder(u));
            assertThrows(IAE, () -> newBuilder().uri(u));
        }

        assertEquals(newBuilder(uri).build().uri(), uri);
        assertEquals(newBuilder().uri(uri).build().uri(), uri);
        URI https = URI.create("https://foo.com");
        assertEquals(newBuilder(https).build().uri(), https);
        assertEquals(newBuilder().uri(https).build().uri(), https);
    }

    @Test
    public void testMethod() {
        HttpRequest request = newBuilder(uri).build();
        assertEquals(request.method(), "GET");
        assertTrue(!request.bodyPublisher().isPresent());

        request = newBuilder(uri).GET().build();
        assertEquals(request.method(), "GET");
        assertTrue(!request.bodyPublisher().isPresent());

        request = newBuilder(uri).POST(fromString("")).GET().build();
        assertEquals(request.method(), "GET");
        assertTrue(!request.bodyPublisher().isPresent());

        request = newBuilder(uri).PUT(fromString("")).GET().build();
        assertEquals(request.method(), "GET");
        assertTrue(!request.bodyPublisher().isPresent());

        request = newBuilder(uri).DELETE(fromString("")).GET().build();
        assertEquals(request.method(), "GET");
        assertTrue(!request.bodyPublisher().isPresent());

        request = newBuilder(uri).POST(fromString("")).build();
        assertEquals(request.method(), "POST");
        assertTrue(request.bodyPublisher().isPresent());

        request = newBuilder(uri).PUT(fromString("")).build();
        assertEquals(request.method(), "PUT");
        assertTrue(request.bodyPublisher().isPresent());

        request = newBuilder(uri).DELETE(fromString("")).build();
        assertEquals(request.method(), "DELETE");
        assertTrue(request.bodyPublisher().isPresent());

        request = newBuilder(uri).GET().POST(fromString("")).build();
        assertEquals(request.method(), "POST");
        assertTrue(request.bodyPublisher().isPresent());

        request = newBuilder(uri).GET().PUT(fromString("")).build();
        assertEquals(request.method(), "PUT");
        assertTrue(request.bodyPublisher().isPresent());

        request = newBuilder(uri).GET().DELETE(fromString("")).build();
        assertEquals(request.method(), "DELETE");
        assertTrue(request.bodyPublisher().isPresent());

        // CONNECT is disallowed in the implementation, since it is used for
        // tunneling, and is handled separately for security checks.
        assertThrows(IAE, () -> newBuilder(uri).method("CONNECT", noBody()).build());

        request = newBuilder(uri).method("GET", noBody()).build();
        assertEquals(request.method(), "GET");
        assertTrue(request.bodyPublisher().isPresent());

        request = newBuilder(uri).method("POST", fromString("")).build();
        assertEquals(request.method(), "POST");
        assertTrue(request.bodyPublisher().isPresent());
    }

    @Test
    public void testHeaders() {
        HttpRequest.Builder builder = newBuilder(uri);

        String[] empty = new String[0];
        assertThrows(IAE, () -> builder.headers(empty).build());
        assertThrows(IAE, () -> builder.headers("1").build());
        assertThrows(IAE, () -> builder.headers("1", "2", "3").build());
        assertThrows(IAE, () -> builder.headers("1", "2", "3", "4", "5").build());
        assertEquals(builder.build().headers().map().size(),0);

        List<HttpRequest> requests = List.of(
                // same header built from different combinations of the API
                newBuilder(uri).header("A", "B").build(),
                newBuilder(uri).headers("A", "B").build(),
                newBuilder(uri).setHeader("A", "B").build(),
                newBuilder(uri).header("A", "F").setHeader("A", "B").build(),
                newBuilder(uri).headers("A", "F").setHeader("A", "B").build()
        );

        for (HttpRequest r : requests) {
            assertEquals(r.headers().map().size(), 1);
            assertTrue(r.headers().firstValue("A").isPresent());
            assertEquals(r.headers().firstValue("A").get(), "B");
            assertEquals(r.headers().allValues("A"), List.of("B"));
            assertEquals(r.headers().allValues("C").size(), 0);
            assertEquals(r.headers().map().get("A"), List.of("B"));
            assertThrows(NFE, () -> r.headers().firstValueAsLong("A"));
            assertFalse(r.headers().firstValue("C").isPresent());
            // a non-exhaustive list of mutators
            assertThrows(UOE, () -> r.headers().map().put("Z", List.of("Z")));
            assertThrows(UOE, () -> r.headers().map().remove("A"));
            assertThrows(UOE, () -> r.headers().map().remove("A", "B"));
            assertThrows(UOE, () -> r.headers().map().clear());
            assertThrows(UOE, () -> r.headers().allValues("A").remove("B"));
            assertThrows(UOE, () -> r.headers().allValues("A").remove(1));
            assertThrows(UOE, () -> r.headers().allValues("A").clear());
            assertThrows(UOE, () -> r.headers().allValues("A").add("Z"));
            assertThrows(UOE, () -> r.headers().allValues("A").addAll(List.of("Z")));
            assertThrows(UOE, () -> r.headers().allValues("A").add(1, "Z"));
        }

        requests = List.of(
                // same headers built from different combinations of the API
                newBuilder(uri).header("A", "B")
                               .header("C", "D").build(),
                newBuilder(uri).header("A", "B")
                               .headers("C", "D").build(),
                newBuilder(uri).header("A", "B")
                               .setHeader("C", "D").build(),
                newBuilder(uri).headers("A", "B")
                               .headers("C", "D").build(),
                newBuilder(uri).headers("A", "B")
                               .header("C", "D").build(),
                newBuilder(uri).headers("A", "B")
                               .setHeader("C", "D").build(),
                newBuilder(uri).setHeader("A", "B")
                               .setHeader("C", "D").build(),
                newBuilder(uri).setHeader("A", "B")
                               .header("C", "D").build(),
                newBuilder(uri).setHeader("A", "B")
                               .headers("C", "D").build(),
                newBuilder(uri).headers("A", "B", "C", "D").build()
        );

        for (HttpRequest r : requests) {
            assertEquals(r.headers().map().size(), 2);
            assertTrue(r.headers().firstValue("A").isPresent());
            assertEquals(r.headers().firstValue("A").get(), "B");
            assertEquals(r.headers().allValues("A"), List.of("B"));
            assertTrue(r.headers().firstValue("C").isPresent());
            assertEquals(r.headers().firstValue("C").get(), "D");
            assertEquals(r.headers().allValues("C"), List.of("D"));
            assertEquals(r.headers().map().get("C"), List.of("D"));
            assertThrows(NFE, () -> r.headers().firstValueAsLong("C"));
            assertFalse(r.headers().firstValue("E").isPresent());
            // a smaller non-exhaustive list of mutators
            assertThrows(UOE, () -> r.headers().map().put("Z", List.of("Z")));
            assertThrows(UOE, () -> r.headers().map().remove("C"));
            assertThrows(UOE, () -> r.headers().allValues("A").remove("B"));
            assertThrows(UOE, () -> r.headers().allValues("A").clear());
            assertThrows(UOE, () -> r.headers().allValues("C").add("Z"));
        }

        requests = List.of(
                // same multi-value headers built from different combinations of the API
                newBuilder(uri).header("A", "B")
                               .header("A", "C").build(),
                newBuilder(uri).header("A", "B")
                               .headers("A", "C").build(),
                newBuilder(uri).headers("A", "B")
                               .headers("A", "C").build(),
                newBuilder(uri).headers("A", "B")
                               .header("A", "C").build(),
                newBuilder(uri).setHeader("A", "B")
                               .header("A", "C").build(),
                newBuilder(uri).setHeader("A", "B")
                               .headers("A", "C").build(),
                newBuilder(uri).header("A", "D")
                               .setHeader("A", "B")
                               .headers("A", "C").build(),
                newBuilder(uri).headers("A", "B", "A", "C").build()
        );

        for (HttpRequest r : requests) {
            assertEquals(r.headers().map().size(), 1);
            assertTrue(r.headers().firstValue("A").isPresent());
            assertTrue(r.headers().allValues("A").containsAll(List.of("B", "C")));
            assertEquals(r.headers().allValues("C").size(), 0);
            assertEquals(r.headers().map().get("A"), List.of("B", "C"));
            assertThrows(NFE, () -> r.headers().firstValueAsLong("A"));
            assertFalse(r.headers().firstValue("C").isPresent());
            // a non-exhaustive list of mutators
            assertThrows(UOE, () -> r.headers().map().put("Z", List.of("Z")));
            assertThrows(UOE, () -> r.headers().map().remove("A"));
            assertThrows(UOE, () -> r.headers().map().remove("A", "B"));
            assertThrows(UOE, () -> r.headers().map().clear());
            assertThrows(UOE, () -> r.headers().allValues("A").remove("B"));
            assertThrows(UOE, () -> r.headers().allValues("A").remove(1));
            assertThrows(UOE, () -> r.headers().allValues("A").clear());
            assertThrows(UOE, () -> r.headers().allValues("A").add("Z"));
            assertThrows(UOE, () -> r.headers().allValues("A").addAll(List.of("Z")));
            assertThrows(UOE, () -> r.headers().allValues("A").add(1, "Z"));
        }
    }

    @Test
    public void testCopy() {
        HttpRequest.Builder builder = newBuilder(uri).expectContinue(true)
                                                     .header("A", "B")
                                                     .POST(fromString(""))
                                                     .timeout(ofSeconds(30))
                                                     .version(HTTP_1_1);
        HttpRequest.Builder copy = builder.copy();
        assertTrue(builder != copy);

        // modify the original builder before building from the copy
        builder.GET().timeout(ofSeconds(5)).version(HTTP_2).setHeader("A", "C");

        HttpRequest copyRequest = copy.build();
        assertEquals(copyRequest.uri(), uri);
        assertEquals(copyRequest.expectContinue(), true);
        assertEquals(copyRequest.headers().map().get("A"), List.of("B"));
        assertEquals(copyRequest.method(), "POST");
        assertEquals(copyRequest.bodyPublisher().isPresent(), true);
        assertEquals(copyRequest.timeout().get(), ofSeconds(30));
        assertTrue(copyRequest.version().isPresent());
        assertEquals(copyRequest.version().get(), HTTP_1_1);
    }

    @Test
    public void testTimeout() {
        HttpRequest.Builder builder = newBuilder(uri);
        assertThrows(IAE, () -> builder.timeout(ZERO));
        assertThrows(IAE, () -> builder.timeout(ofSeconds(0)));
        assertThrows(IAE, () -> builder.timeout(ofSeconds(-1)));
        assertThrows(IAE, () -> builder.timeout(ofNanos(-100)));
        assertEquals(builder.timeout(ofNanos(15)).build().timeout().get(), ofNanos(15));
        assertEquals(builder.timeout(ofSeconds(50)).build().timeout().get(), ofSeconds(50));
        assertEquals(builder.timeout(ofMinutes(30)).build().timeout().get(), ofMinutes(30));
    }

    @Test
    public void testExpect() {
        HttpRequest.Builder builder = newBuilder(uri);
        assertEquals(builder.build().expectContinue(), false);
        assertEquals(builder.expectContinue(true).build().expectContinue(), true);
        assertEquals(builder.expectContinue(false).build().expectContinue(), false);
        assertEquals(builder.expectContinue(true).build().expectContinue(), true);
    }
}