/*

 * Copyright (c) 2016, 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

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 */

import java.net.URI;

import java.time.Duration;

import java.util.Arrays;

import java.util.function.BiFunction;

import java.util.function.Function;

import java.util.function.Supplier;

import java.util.stream.Collectors;

import java.util.stream.Stream;

/**

 * @test

 * @bug 8170064

 * @summary  HttpRequest[.Builder] API and behaviour checks

 */

public class HttpRequestBuilderTest {

    static final URI TEST_URI = URI.create("http://www.foo.com/");

    public static void main(String[] args) throws Exception {

        test0("newBuilder().build()",

              () -> HttpRequest.newBuilder().build(),

              IllegalStateException.class);

        test0("newBuilder(null)",

              () -> HttpRequest.newBuilder(null),

              NullPointerException.class);

        test0("newBuilder(URI.create(\"badScheme://www.foo.com/\")",

              () -> HttpRequest.newBuilder(URI.create("badScheme://www.foo.com/")),

              IllegalArgumentException.class);

        test0("newBuilder(URI.create(\"http://www.foo.com:-1/\")",

                () -> HttpRequest.newBuilder(URI.create("http://www.foo.com:-1/")),

                IllegalArgumentException.class);

        test0("newBuilder(URI.create(\"https://www.foo.com:-1/\")",

                () -> HttpRequest.newBuilder(URI.create("https://www.foo.com:-1/")),

                IllegalArgumentException.class);

        test0("newBuilder(" + TEST_URI + ").uri(null)",

              () -> HttpRequest.newBuilder(TEST_URI).uri(null),

              NullPointerException.class);

        test0("newBuilder(uri).build()",

              () -> HttpRequest.newBuilder(TEST_URI).build()

              /* no expected exceptions */ );

        HttpRequest.Builder builder = HttpRequest.newBuilder();

        builder = test1("uri", builder, builder::uri, (URI)null,

                        NullPointerException.class);

        builder = test1("uri", builder, builder::uri, URI.create("http://www.foo.com:-1/"),

                        IllegalArgumentException.class);

        builder = test1("uri", builder, builder::uri, URI.create("https://www.foo.com:-1/"),

                        IllegalArgumentException.class);

        builder = test2("header", builder, builder::header, (String) null, "bar",

                        NullPointerException.class);

        builder = test2("header", builder, builder::header, "foo", (String) null,

                        NullPointerException.class);

        builder = test2("header", builder, builder::header, (String)null,

                        (String) null, NullPointerException.class);

        builder = test2("header", builder, builder::header, "", "bar",

                        IllegalArgumentException.class);

        builder = test2("header", builder, builder::header, "foo", "\r",

                        IllegalArgumentException.class);

        builder = test1("headers", builder, builder::headers, (String[]) null,

                        NullPointerException.class);

        builder = test1("headers", builder, builder::headers, new String[0],

                        IllegalArgumentException.class);

        builder = test1("headers", builder, builder::headers,

                        (String[]) new String[] {null, "bar"},

                        NullPointerException.class);

        builder = test1("headers", builder, builder::headers,

                        (String[]) new String[] {"foo", null},

                        NullPointerException.class);

        builder = test1("headers", builder, builder::headers,

                        (String[]) new String[] {null, null},

                        NullPointerException.class);

        builder = test1("headers", builder, builder::headers,

                        (String[]) new String[] {"foo", "bar", null},

                        NullPointerException.class,

                        IllegalArgumentException.class);

        builder = test1("headers", builder, builder::headers,

                        (String[]) new String[] {"foo", "bar", null, null},

                        NullPointerException.class);

        builder = test1("headers", builder, builder::headers,

                        (String[]) new String[] {"foo", "bar", "baz", null},

                        NullPointerException.class);

        builder = test1("headers", builder, builder::headers,

                        (String[]) new String[] {"foo", "bar", "\r", "baz"},

                        IllegalArgumentException.class);

        builder = test1("headers", builder, builder::headers,

                        (String[]) new String[] {"foo", "bar", "baz", "\n"},

                        IllegalArgumentException.class);

        builder = test1("headers", builder, builder::headers,

                        (String[]) new String[] {"foo", "bar", "", "baz"},

                        IllegalArgumentException.class);

        builder = test1("headers", builder, builder::headers,

                        (String[]) new String[] {"foo", "bar", null, "baz"},

                        NullPointerException.class);

        builder = test1("headers", builder, builder::headers,

                        (String[]) new String[] {"foo", "bar", "baz"},

                        IllegalArgumentException.class);

        builder = test1("headers", builder, builder::headers,

                        (String[]) new String[] {"foo"},

                        IllegalArgumentException.class);

        builder = test1("DELETE", builder, builder::DELETE,

                        noBody(), null);

        builder = test1("POST", builder, builder::POST,

                        noBody(), null);

        builder = test1("PUT", builder, builder::PUT,

                        noBody(), null);

        builder = test2("method", builder, builder::method, "GET",

                        noBody(), null);

        builder = test1("DELETE", builder, builder::DELETE,

                        (HttpRequest.BodyPublisher)null,

                        NullPointerException.class);

        builder = test1("POST", builder, builder::POST,

                        (HttpRequest.BodyPublisher)null,

                        NullPointerException.class);

        builder = test1("PUT", builder, builder::PUT,

                        (HttpRequest.BodyPublisher)null,

                        NullPointerException.class);

        builder = test2("method", builder, builder::method, "GET",

                        (HttpRequest.BodyPublisher) null,

                        NullPointerException.class);

        builder = test2("setHeader", builder, builder::setHeader,

                        (String) null, "bar",

                        NullPointerException.class);

        builder = test2("setHeader", builder, builder::setHeader,

                        "foo", (String) null,

                        NullPointerException.class);

        builder = test2("setHeader", builder, builder::setHeader,

                        (String)null, (String) null,

                        NullPointerException.class);

        builder = test1("timeout", builder, builder::timeout,

                        (Duration)null,

                        NullPointerException.class);

        builder = test1("version", builder, builder::version,

                        (HttpClient.Version)null,

                        NullPointerException.class);

        builder = test2("method", builder, builder::method, null,

                        fromString("foo"),

                        NullPointerException.class);

// see JDK-8170093

//

//        builder = test2("method", builder, builder::method, "foo",

//                       HttpRequest.BodyProcessor.fromString("foo"),

//                       IllegalArgumentException.class);

//

//        builder.build();

        method("newBuilder(TEST_URI).build().method() == GET",

               () -> HttpRequest.newBuilder(TEST_URI),

               "GET");

        method("newBuilder(TEST_URI).GET().build().method() == GET",

               () -> HttpRequest.newBuilder(TEST_URI).GET(),

               "GET");

        method("newBuilder(TEST_URI).POST(fromString(\"\")).GET().build().method() == GET",

               () -> HttpRequest.newBuilder(TEST_URI).POST(fromString("")).GET(),

               "GET");

        method("newBuilder(TEST_URI).PUT(fromString(\"\")).GET().build().method() == GET",

               () -> HttpRequest.newBuilder(TEST_URI).PUT(fromString("")).GET(),

               "GET");

        method("newBuilder(TEST_URI).DELETE(fromString(\"\")).GET().build().method() == GET",

               () -> HttpRequest.newBuilder(TEST_URI).DELETE(fromString("")).GET(),

               "GET");

        method("newBuilder(TEST_URI).POST(fromString(\"\")).build().method() == POST",

               () -> HttpRequest.newBuilder(TEST_URI).POST(fromString("")),

               "POST");

        method("newBuilder(TEST_URI).PUT(fromString(\"\")).build().method() == PUT",

               () -> HttpRequest.newBuilder(TEST_URI).PUT(fromString("")),

               "PUT");

        method("newBuilder(TEST_URI).DELETE(fromString(\"\")).build().method() == DELETE",

               () -> HttpRequest.newBuilder(TEST_URI).DELETE(fromString("")),

               "DELETE");

        method("newBuilder(TEST_URI).GET().POST(fromString(\"\")).build().method() == POST",

               () -> HttpRequest.newBuilder(TEST_URI).GET().POST(fromString("")),

               "POST");

        method("newBuilder(TEST_URI).GET().PUT(fromString(\"\")).build().method() == PUT",

               () -> HttpRequest.newBuilder(TEST_URI).GET().PUT(fromString("")),

               "PUT");

        method("newBuilder(TEST_URI).GET().DELETE(fromString(\"\")).build().method() == DELETE",

               () -> HttpRequest.newBuilder(TEST_URI).GET().DELETE(fromString("")),

               "DELETE");

    }

    private static boolean shouldFail(Class<? extends Exception> ...exceptions) {

        return exceptions != null && exceptions.length > 0;

    }

    private static String expectedNames(Class<? extends Exception> ...exceptions) {

        return Stream.of(exceptions).map(Class::getSimpleName)

                .collect(Collectors.joining("|"));

    }

    private static boolean isExpected(Exception x,

                                     Class<? extends Exception> ...expected) {

        return expected != null && Stream.of(expected)

                .filter(c -> c.isInstance(x))

                .findAny().isPresent();

    }

    static void method(String name,

                       Supplier<HttpRequest.Builder> supplier,

                       String expectedMethod) {

        HttpRequest request = supplier.get().build();

        String method = request.method();

        if (request.method().equals("GET") && request.bodyPublisher().isPresent())

            throw new AssertionError("failed: " + name

                    + ". Unexpected body processor for GET: "

                    + request.bodyPublisher().get());

        if (expectedMethod.equals(method)) {

            System.out.println("success: " + name);

        } else {

            throw new AssertionError("failed: " + name

                    + ". Expected " + expectedMethod + ", got " + method);

        }

    }

    static void test0(String name,

                      Runnable r,

                      Class<? extends Exception> ...ex) {

        try {

            r.run();

            if (!shouldFail(ex)) {

                System.out.println("success: " + name);

                return;

            } else {

                throw new AssertionError("Expected " + expectedNames(ex)

                        + " not raised for " + name);

            }

        } catch (Exception x) {

            if (!isExpected(x, ex)) {

                throw x;

            } else {

                System.out.println("success: " + name +

                        " - Got expected exception: " + x);

            }

        }

    }

    public static <R,P> R test1(String name, R receiver, Function<P, R> m, P arg,

                               Class<? extends Exception> ...ex) {

        String argMessage = arg == null ? "null" : arg.toString();

        if (arg instanceof String[]) {

            argMessage = Arrays.asList((String[])arg).toString();

        }

        try {

            R result =  m.apply(arg);

            if (!shouldFail(ex)) {

                System.out.println("success: " + name + "(" + argMessage + ")");

                return result;

            } else {

                throw new AssertionError("Expected " + expectedNames(ex)

                    + " not raised for " + name + "(" + argMessage + ")");

            }

        } catch (Exception x) {

            if (!isExpected(x, ex)) {

                throw x;

            } else {

                System.out.println("success: " + name + "(" + argMessage + ")" +

                        " - Got expected exception: " + x);

                return receiver;

            }

        }

    }

    public static <R,P1, P2> R test2(String name, R receiver, BiFunction<P1, P2, R> m,

                               P1 arg1, P2 arg2,

                               Class<? extends Exception> ...ex) {

        try {

            R result =  m.apply(arg1, arg2);

            if (!shouldFail(ex)) {

                System.out.println("success: " + name + "(" + arg1 + ", "

                                   + arg2 + ")");

                return result;

            } else {

                throw new AssertionError("Expected " + expectedNames(ex)

                    + " not raised for "

                    + name + "(" + arg1 +", " + arg2 + ")");

            }

        } catch (Exception x) {

            if (!isExpected(x, ex)) {

                throw x;

            } else {

                System.out.println("success: " + name + "(" + arg1 + ", "

                        + arg2 + ") - Got expected exception: " + x);

                return receiver;

            }

        }

    }

}