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/*

 * @test

 * @summary tests for multi-module mode compilation

 * @library /tools/lib

 * @modules

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

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

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

 * @run main EdgeCases

 */

import java.io.Writer;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.util.Arrays;

import java.util.HashSet;

import java.util.List;

import java.util.Objects;

import java.util.Set;

import javax.lang.model.element.Element;

import javax.tools.JavaCompiler;

import javax.tools.JavaFileObject;

import javax.tools.StandardJavaFileManager;

import javax.tools.ToolProvider;

import com.sun.source.tree.CompilationUnitTree;

import com.sun.tools.javac.api.JavacTaskImpl;

import com.sun.tools.javac.code.Symbol.ModuleSymbol;

public class EdgeCases extends ModuleTestBase {

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

        new EdgeCases().runTests();

    }

    @Test

    void testAddExportUndefinedModule(Path base) throws Exception {

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

        tb.writeJavaFiles(src, "package test; import undef.Any; public class Test {}");

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

        tb.createDirectories(classes);

                .options("-XaddExports:undef/undef=ALL-UNNAMED", "-XDrawDiagnostics")

                .outdir(classes)

                .files(findJavaFiles(src))

                .writeAll()

        List<String> expected = Arrays.asList("- compiler.err.cant.find.module: undef",

                                              "Test.java:1:27: compiler.err.doesnt.exist: undef",

                                              "2 errors");

        if (!expected.equals(log))

            throw new Exception("expected output not found: " + log);

    }

    @Test

    void testModuleSymbolOutterMostClass(Path base) throws Exception {

        JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();

        try (StandardJavaFileManager fm = compiler.getStandardFileManager(null, null, null)) {

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

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

            tb.writeJavaFiles(m1, "module m1 { }");

            Iterable<? extends JavaFileObject> files = fm.getJavaFileObjects(findJavaFiles(moduleSrc));

            task.analyze();

            ModuleSymbol msym = (ModuleSymbol) task.getElements().getModuleElement("m1");

            msym.outermostClass();

        }

    }

    @Test

    void testParseEnterAnalyze(Path base) throws Exception {

        JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();

        try (StandardJavaFileManager fm = compiler.getStandardFileManager(null, null, null)) {

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

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

            tb.writeJavaFiles(m1, "module m1 { }",

                                  "package p;",

                                  "package p; class T { }");

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

            Iterable<? extends JavaFileObject> files = fm.getJavaFileObjects(findJavaFiles(moduleSrc));

            List<String> options = Arrays.asList("-d", classes.toString(), "-Xpkginfo:always");

            JavacTaskImpl task = (JavacTaskImpl) compiler.getTask(null, fm, null, options, null, files);

            Iterable<? extends CompilationUnitTree> parsed = task.parse();

            Iterable<? extends Element> entered = task.enter(parsed);

            Iterable<? extends Element> analyzed = task.analyze(entered);

            Iterable<? extends JavaFileObject> generatedFiles = task.generate(analyzed);

            Set<String> generated = new HashSet<>();

            for (JavaFileObject jfo : generatedFiles) {

                generated.add(jfo.getName());

            }

            Set<String> expected = new HashSet<>(

                    Arrays.asList(Paths.get("testParseEnterAnalyze", "classes", "p", "package-info.class").toString(),

                                  Paths.get("testParseEnterAnalyze", "classes", "module-info.class").toString(),

                                  Paths.get("testParseEnterAnalyze", "classes", "p", "T.class").toString())

            );

            if (!Objects.equals(expected, generated))

                throw new AssertionError("Incorrect generated files: " + generated);

        }

    }

    @Test

    void testModuleImplicitModuleBoundaries(Path base) throws Exception {

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

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

        tb.writeJavaFiles(src_m1,

                          "module m1 { exports api1; }",

                          "package api1; public class Api1 { public void call() { } }");

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

        tb.writeJavaFiles(src_m2,

                          "module m2 { requires m1; exports api2; }",

                          "package api2; public class Api2 { public static api1.Api1 get() { return null; } }");

        Path src_m3 = src.resolve("m3");

        tb.writeJavaFiles(src_m3,

                          "module m3 { requires m2; }",

                          "package test; public class Test { { api2.Api2.get().call(); api2.Api2.get().toString(); } }");

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

        tb.createDirectories(classes);

                .options("-XDrawDiagnostics",

                         "-modulesourcepath", src.toString())

                .outdir(classes)

                .files(findJavaFiles(src))

                .writeAll()

        if (!log.contains("Test.java:1:52: compiler.err.not.def.access.class.intf.cant.access: call(), api1.Api1") ||

            !log.contains("Test.java:1:76: compiler.err.not.def.access.class.intf.cant.access: toString(), java.lang.Object"))

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

    }

    @Test

    void testAssignClassToAutomaticModule(Path base) throws Exception {

        //check that if a ClassSymbol belongs to an automatic module, it is properly assigned and not

        //duplicated when being accessed through a classfile.

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

        tb.writeJavaFiles(automaticSrc, "package api1; public class Api1 {}");

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

        tb.createDirectories(automaticClasses);

                                .outdir(automaticClasses)

                                .files(findJavaFiles(automaticSrc))

                                .run()

                                .writeAll()

        if (!automaticLog.isEmpty())

            throw new Exception("expected output not found: " + automaticLog);

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

        Files.createDirectories(modulePath);

        Path automaticJar = modulePath.resolve("m1-1.0.jar");

          .baseDir(automaticClasses)

          .files("api1/Api1.class")

          .run();

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

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

        tb.writeJavaFiles(src_m2,

                          "module m2 { requires m1; exports api2; }",

                          "package api2; public class Api2 { public static api1.Api1 get() { return null; } }");

        Path src_m3 = src.resolve("m3");

        tb.writeJavaFiles(src_m3,

                          "module m3 { requires m1; requires m2; }",

                          "package test; public class Test { { api2.Api2.get(); api1.Api1 a1; } }");

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

        tb.createDirectories(classes);

                .options("-modulepath", modulePath.toString(),

                         "-modulesourcepath", src.toString())

                .outdir(classes)

                .files(findJavaFiles(src_m2))

                .run()

                .writeAll();

                .options("-modulepath", modulePath.toString(),

                         "-modulesourcepath", src.toString())

                .outdir(classes)

                .files(findJavaFiles(src_m3))

                .run()

                .writeAll();

    }

    @Test

    void testEmptyImplicitModuleInfo(Path base) throws Exception {

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

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

        Files.createDirectories(src_m1);

        try (Writer w = Files.newBufferedWriter(src_m1.resolve("module-info.java"))) {}

        tb.writeJavaFiles(src_m1,

                          "package test; public class Test {}");

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

        tb.createDirectories(classes);

                .options("-sourcepath", src_m1.toString(),

                         "-XDrawDiagnostics")

                .outdir(classes)

                .files(findJavaFiles(src_m1.resolve("test")))

                .writeAll();

        tb.writeJavaFiles(src_m1,

                          "module m1 {}");

                .options("-sourcepath", src_m1.toString())

                .outdir(classes)

                .files(findJavaFiles(src_m1.resolve("test")))

                .run()

                .writeAll();

    }

}