/*

 * Copyright (c) 2015, 2016, 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

 * @library /tools/lib

 * @modules jdk.compiler/com.sun.tools.javac.api

 *          jdk.compiler/com.sun.tools.javac.main

 *          jdk.jdeps/com.sun.tools.javap

 * @build toolbox.ToolBox toolbox.JarTask toolbox.JavacTask toolbox.JavapTask ModuleTestBase

 * @run main AddReadsTest

 */

import java.nio.file.Files;

import java.nio.file.Path;

import java.util.Set;

import javax.annotation.processing.AbstractProcessor;

import javax.annotation.processing.RoundEnvironment;

import javax.annotation.processing.SupportedAnnotationTypes;

import javax.lang.model.SourceVersion;

import javax.lang.model.element.ModuleElement;

import javax.lang.model.element.ModuleElement.RequiresDirective;

import javax.lang.model.element.TypeElement;

import javax.lang.model.util.ElementFilter;

import toolbox.JarTask;

import toolbox.JavacTask;

import toolbox.JavapTask;

import toolbox.Task;

import toolbox.ToolBox;

public class AddReadsTest extends ModuleTestBase {

    public static void main(String... args) throws Exception {

        new AddReadsTest().runTests();

    }

    @Test

    public void testAddReads(Path base) throws Exception {

        Path src = base.resolve("src");

        Path src_m1 = src.resolve("m1");

        tb.writeJavaFiles(src_m1,

                          "module m1 { exports api; }",

                          "package api; public class Api { }");

        Path src_m2 = src.resolve("m2");

        tb.writeJavaFiles(src_m2,

                          "module m2 { }",

                          "package test; public class Test extends api.Api { }");

        Path classes = base.resolve("classes");

        tb.createDirectories(classes);

        String log = new JavacTask(tb)

                .options("-XDrawDiagnostics",

                .outdir(classes)

                .files(findJavaFiles(src))

                .run(Task.Expect.FAIL)

                .writeAll()

                .getOutput(Task.OutputKind.DIRECT);

        if (!log.contains("Test.java:1:44: compiler.err.not.def.access.package.cant.access: api.Api, api"))

            throw new Exception("expected output not found");

        //test add dependencies:

        new JavacTask(tb)

                         "-processor", VerifyRequires.class.getName())

                .outdir(classes)

                .files(findJavaFiles(src))

                .run()

                .writeAll();

        String decompiled = new JavapTask(tb)

                .options("-verbose", classes.resolve("m2").resolve("module-info.class").toString())

                .run()

                .getOutput(Task.OutputKind.DIRECT);

        if (decompiled.contains("m1")) {

            throw new Exception("Incorrectly refers to m1 module.");

        }

        //cyclic dependencies OK when created through addReads:

        new JavacTask(tb)

                .outdir(classes)

                .files(findJavaFiles(src))

                .run()

                .writeAll();

        tb.writeJavaFiles(src_m2,

                          "module m2 { requires m1; }");

        new JavacTask(tb)

                .outdir(classes)

                .files(findJavaFiles(src))

                .run()

                .writeAll();

    }

    @SupportedAnnotationTypes("*")

    public static final class VerifyRequires extends AbstractProcessor {

        @Override

        public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {

            ModuleElement m2Module = processingEnv.getElementUtils().getModuleElement("m2");

            if (m2Module == null) {

                throw new AssertionError("Cannot find the m2 module!");

            }

            boolean foundM1 = false;

            for (RequiresDirective rd : ElementFilter.requiresIn(m2Module.getDirectives())) {

                foundM1 |= rd.getDependency().getSimpleName().contentEquals("m1");

            }

            if (!foundM1) {

                throw new AssertionError("Cannot find the dependency on m1 module!");

            }

            return false;

        }

        @Override

        public SourceVersion getSupportedSourceVersion() {

            return SourceVersion.latest();

        }

    }

    @Test

    public void testAddReadsUnnamedModule(Path base) throws Exception {

        Path jar = prepareTestJar(base);

        Path moduleSrc = base.resolve("module-src");

        Path m1 = moduleSrc.resolve("m1");

        Path classes = base.resolve("classes");

        Files.createDirectories(classes);

        tb.writeJavaFiles(m1,

                          "module m1 { }",

                          "package impl; public class Impl { api.Api api; }");

        new JavacTask(tb)

                   "-XDrawDiagnostics")

          .outdir(classes)

          .files(findJavaFiles(moduleSrc))

          .run()

          .writeAll();

    }

    @Test

    public void testAddReadsUnnamedModulePackageConflict(Path base) throws Exception {

        Path jar = prepareTestJar(base);

        Path moduleSrc = base.resolve("module-src");

        Path m1 = moduleSrc.resolve("m1");

        Path classes = base.resolve("classes");

        Files.createDirectories(classes);

        tb.writeJavaFiles(m1,

                          "module m1 { }",

                          "package api; public class Api { public static void test() { } }",

                          "package impl; public class Impl { { api.Api.test(); } }");

        new JavacTask(tb)

                   "-XDrawDiagnostics")

          .outdir(classes)

          .files(m1.resolve("impl").resolve("Impl.java"))

          .run()

          .writeAll();

    }

    @Test

    public void testAddReadsUnnamedToJavaBase(Path base) throws Exception {

        Path jar = prepareTestJar(base);

        Path src = base.resolve("src");

        Path classes = base.resolve("classes");

        Files.createDirectories(classes);

        tb.writeJavaFiles(src,

                          "package impl; public class Impl { api.Api a; }");

        new JavacTask(tb)

                   "-Xmodule:java.base")

          .outdir(classes)

          .files(src.resolve("impl").resolve("Impl.java"))

          .run()

          .writeAll();

    }

    @Test

    public void testAddReadsToJavaBase(Path base) throws Exception {

        Path src = base.resolve("src");

        Path classes = base.resolve("classes");

        Files.createDirectories(classes);

        tb.writeJavaFiles(src,

                          "package impl; public class Impl { javax.swing.JButton b; }");

        new JavacTask(tb)

                   "-Xmodule:java.base")

          .outdir(classes)

          .files(findJavaFiles(src))

          .run()

          .writeAll();

    }

    private Path prepareTestJar(Path base) throws Exception {

        Path legacySrc = base.resolve("legacy-src");

        tb.writeJavaFiles(legacySrc,

                          "package api; public abstract class Api {}");

        Path legacyClasses = base.resolve("legacy-classes");

        Files.createDirectories(legacyClasses);

        String log = new JavacTask(tb)

                .options()

                .outdir(legacyClasses)

                .files(findJavaFiles(legacySrc))

                .run()

                .writeAll()

                .getOutput(Task.OutputKind.DIRECT);

        if (!log.isEmpty()) {

            throw new Exception("unexpected output: " + log);

        }

        Path lib = base.resolve("lib");

        Files.createDirectories(lib);

        Path jar = lib.resolve("test-api-1.0.jar");

        new JarTask(tb, jar)

          .baseDir(legacyClasses)

          .files("api/Api.class")

          .run();

        return jar;

    }

    @Test

    public void testX(Path base) throws Exception {

        Path src = base.resolve("src");

        Path src_m1 = src.resolve("m1");

        tb.writeJavaFiles(src_m1,

                          "module m1 { provides java.lang.Runnable with impl.Impl; }",

                          "package impl; public class Impl implements Runnable { public void run() { } }");

        Path classes = base.resolve("classes");

        tb.createDirectories(classes);

        new JavacTask(tb)

                .outdir(classes)

                .files(findJavaFiles(src))

                .run()

                .writeAll();

        Path unnamedSrc = base.resolve("unnamed-src");

        Path unnamedClasses = base.resolve("unnamed-classes");

        Files.createDirectories(unnamedClasses);

        tb.writeJavaFiles(unnamedSrc,

                          "package impl; public class Impl { }");

        new JavacTask(tb)

                   "-Xmodule:m1",

          .outdir(unnamedClasses)

          .files(findJavaFiles(unnamedSrc))

          .run()

          .writeAll();

    }

}