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/**
 * @test
 * @bug 8155026
 * @summary Test automatic modules
 * @library /tools/lib
 * @modules
 *      jdk.compiler/com.sun.tools.javac.api
 *      jdk.compiler/com.sun.tools.javac.main
 * @build toolbox.ToolBox toolbox.JavacTask toolbox.JarTask ModuleTestBase
 * @run main AutomaticModules
 */

import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Arrays;
import java.util.List;

import toolbox.JarTask;
import toolbox.JavacTask;
import toolbox.Task;

public class AutomaticModules extends ModuleTestBase {

    public static void main(String... args) throws Exception {
        AutomaticModules t = new AutomaticModules();
        t.runTests();
    }

    @Test
    void testSimple(Path base) throws Exception {
        Path legacySrc = base.resolve("legacy-src");
        tb.writeJavaFiles(legacySrc,
                          "package api; import java.awt.event.ActionListener; public abstract class Api implements ActionListener {}");
        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 modulePath = base.resolve("module-path");

        Files.createDirectories(modulePath);

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

        new JarTask(tb, jar)
          .baseDir(legacyClasses)
          .files("api/Api.class")
          .run();

        Path moduleSrc = base.resolve("module-src");
        Path m1 = moduleSrc.resolve("m1");

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

        Files.createDirectories(classes);

        tb.writeJavaFiles(m1,
                          "module m1 { requires test.api; requires java.desktop; }",
                          "package impl; public class Impl { public void e(api.Api api) { api.actionPerformed(null); } }");

        new JavacTask(tb)
                .options("-doe", "-modulesourcepath", moduleSrc.toString(), "-modulepath", modulePath.toString())
                .outdir(classes)
                .files(findJavaFiles(moduleSrc))
                .run()
                .writeAll();
    }

    @Test
    void testUnnamedModule(Path base) throws Exception {
        Path legacySrc = base.resolve("legacy-src");
        tb.writeJavaFiles(legacySrc,
                          "package api; public abstract class Api { public void run(CharSequence str) { } private void run(base.Base base) { } }",
                          "package base; public interface Base { public void run(); }");
        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 modulePath = base.resolve("module-path");

        Files.createDirectories(modulePath);

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

        new JarTask(tb, apiJar)
          .baseDir(legacyClasses)
          .files("api/Api.class")
          .run();

        Path baseJar = base.resolve("base.jar");

        new JarTask(tb, baseJar)
          .baseDir(legacyClasses)
          .files("base/Base.class")
          .run();

        Path moduleSrc = base.resolve("module-src");
        Path m1 = moduleSrc.resolve("m1");

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

        Files.createDirectories(classes);

        tb.writeJavaFiles(m1,
                          "module m1 { requires test.api; }",
                          "package impl; public class Impl { public void e(api.Api api) { api.run(\"\"); } }");

        new JavacTask(tb)
                .options("-modulesourcepath", moduleSrc.toString(), "-modulepath", modulePath.toString(), "-classpath", baseJar.toString())
                .outdir(classes)
                .files(findJavaFiles(moduleSrc))
                .run()
                .writeAll();
    }

    @Test
    void testModuleInfoFromClassFileDependsOnAutomatic(Path base) throws Exception {
        Path automaticSrc = base.resolve("automaticSrc");
        tb.writeJavaFiles(automaticSrc, "package api; public class Api {}");
        Path automaticClasses = base.resolve("automaticClasses");
        tb.createDirectories(automaticClasses);

        String automaticLog = new JavacTask(tb)
                                .outdir(automaticClasses)
                                .files(findJavaFiles(automaticSrc))
                                .run()
                                .writeAll()
                                .getOutput(Task.OutputKind.DIRECT);

        if (!automaticLog.isEmpty())
            throw new Exception("expected output not found: " + automaticLog);

        Path modulePath = base.resolve("module-path");

        Files.createDirectories(modulePath);

        Path automaticJar = modulePath.resolve("automatic-1.0.jar");

        new JarTask(tb, automaticJar)
          .baseDir(automaticClasses)
          .files("api/Api.class")
          .run();

        Path depSrc = base.resolve("depSrc");
        Path depClasses = base.resolve("depClasses");

        Files.createDirectories(depSrc);
        Files.createDirectories(depClasses);

        tb.writeJavaFiles(depSrc,
                          "module m1 { requires public automatic; }",
                          "package dep; public class Dep { api.Api api; }");

        new JavacTask(tb)
                .options("-modulepath", modulePath.toString())
                .outdir(depClasses)
                .files(findJavaFiles(depSrc))
                .run()
                .writeAll();

        Path moduleJar = modulePath.resolve("m1.jar");

        new JarTask(tb, moduleJar)
          .baseDir(depClasses)
          .files("module-info.class", "dep/Dep.class")
          .run();

        Path testSrc = base.resolve("testSrc");
        Path testClasses = base.resolve("testClasses");

        Files.createDirectories(testSrc);
        Files.createDirectories(testClasses);

        tb.writeJavaFiles(testSrc,
                          "module m2 { requires automatic; }",
                          "package test; public class Test { }");

        new JavacTask(tb)
                .options("-modulepath", modulePath.toString())
                .outdir(testClasses)
                .files(findJavaFiles(testSrc))
                .run()
                .writeAll();
    }

    @Test
    void testAutomaticAndNamedModules(Path base) throws Exception {
        Path modulePath = base.resolve("module-path");

        Files.createDirectories(modulePath);

        for (char c : new char[] {'A', 'B'}) {
            Path automaticSrc = base.resolve("automaticSrc" + c);
            tb.writeJavaFiles(automaticSrc, "package api" + c + "; public class Api {}");
            Path automaticClasses = base.resolve("automaticClasses" + c);
            tb.createDirectories(automaticClasses);

            String automaticLog = new JavacTask(tb)
                                    .outdir(automaticClasses)
                                    .files(findJavaFiles(automaticSrc))
                                    .run()
                                    .writeAll()
                                    .getOutput(Task.OutputKind.DIRECT);

            if (!automaticLog.isEmpty())
                throw new Exception("expected output not found: " + automaticLog);

            Path automaticJar = modulePath.resolve("automatic" + c + "-1.0.jar");

            new JarTask(tb, automaticJar)
              .baseDir(automaticClasses)
              .files("api" + c + "/Api.class")
              .run();
        }

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

        tb.writeJavaFiles(moduleSrc.resolve("m1"),
                          "module m1 { requires automaticA; }",
                          "package impl; public class Impl { apiA.Api a; apiB.Api b; m2.M2 m;}");

        tb.writeJavaFiles(moduleSrc.resolve("m2"),
                          "module m2 { exports m2; }",
                          "package m2; public class M2 { }");

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

        Files.createDirectories(classes);

        List<String> log = new JavacTask(tb)
                .options("-modulesourcepath", moduleSrc.toString(),
                         "-modulepath", modulePath.toString(),
                         "-addmods", "automaticB",
                         "-XDrawDiagnostics")
                .outdir(classes)
                .files(findJavaFiles(moduleSrc))
                .run(Task.Expect.FAIL)
                .writeAll()
                .getOutputLines(Task.OutputKind.DIRECT);

        List<String> expected = Arrays.asList("Impl.java:1:61: compiler.err.not.def.access.package.cant.access: m2.M2, m2",
                                              "1 error");

        if (!expected.equals(log)) {
            throw new Exception("expected output not found: " + log);
        }

        log = new JavacTask(tb)
                .options("-modulesourcepath", moduleSrc.toString(),
                         "-modulepath", modulePath.toString(),
                         "-XDrawDiagnostics")
                .outdir(classes)
                .files(findJavaFiles(moduleSrc))
                .run(Task.Expect.FAIL)
                .writeAll()
                .getOutputLines(Task.OutputKind.DIRECT);

        expected = Arrays.asList("Impl.java:1:51: compiler.err.doesnt.exist: apiB",
                                 "Impl.java:1:61: compiler.err.not.def.access.package.cant.access: m2.M2, m2",
                                 "2 errors");

        if (!expected.equals(log)) {
            throw new Exception("expected output not found: " + log);
        }
    }
}