/*

 * Copyright (c) 2012, 2013, 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 Add lambda tests

 *  Automatic test for checking correctness of structural most specific test routine

 * @library ../../lib

 * @build JavacTestingAbstractThreadedTest

 */

import java.net.URI;

import java.util.Arrays;

import javax.tools.Diagnostic;

import javax.tools.JavaFileObject;

import javax.tools.SimpleJavaFileObject;

import com.sun.source.util.JavacTask;

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

import com.sun.tools.javac.util.JCDiagnostic;

public class StructuralMostSpecificTest

    extends JavacTestingAbstractThreadedTest

    implements Runnable {

    enum RetTypeKind {

        SHORT("short"),

        INT("int"),

        OBJECT("Object"),

        INTEGER("Integer"),

        VOID("void"),

        J_L_VOID("Void");

        String retTypeStr;

        RetTypeKind(String retTypeStr) {

            this.retTypeStr = retTypeStr;

        }

        boolean moreSpecificThan(RetTypeKind rk) {

            return moreSpecificThan[this.ordinal()][rk.ordinal()];

        }

        static boolean[][] moreSpecificThan = {

                //              SHORT |  INT  | OBJECT | INTEGER | VOID  | J_L_VOID

                /* SHORT */   { true  , true  , true   , false   , false , false },

                /* INT */     { false , true  , true   , true    , false , false },

                /* OBJECT */  { false , false , true   , false   , false , false },

                /* INTEGER */ { false , false , true   , true    , false , false },

                /* VOID */    { false , false , false  , false   , true  , true  },

                /* J_L_VOID */{ false , false , true   , false   , false , true  } };

    }

    enum ArgTypeKind {

        SHORT("short"),

        INT("int"),

        BOOLEAN("boolean"),

        OBJECT("Object"),

        INTEGER("Integer"),

        DOUBLE("Double");

        String argTypeStr;

        ArgTypeKind(String typeStr) {

            this.argTypeStr = typeStr;

        }

    }

    enum ExceptionKind {

        NONE(""),

        EXCEPTION("throws Exception"),

        SQL_EXCEPTION("throws java.sql.SQLException"),

        IO_EXCEPTION("throws java.io.IOException");

        String exceptionStr;

        ExceptionKind(String exceptionStr) {

            this.exceptionStr = exceptionStr;

        }

    }

    enum LambdaReturnKind {

        VOID("return;"),

        SHORT("return (short)0;"),

        INT("return 0;"),

        INTEGER("return (Integer)null;"),

        NULL("return null;");

        String retStr;

        LambdaReturnKind(String retStr) {

            this.retStr = retStr;

        }

        boolean compatibleWith(RetTypeKind rk) {

            return compatibleWith[rk.ordinal()][ordinal()];

        }

        static boolean[][] compatibleWith = {

                //              VOID  | SHORT | INT     | INTEGER | NULL

                /* SHORT */   { false , true  , false   , false   , false },

                /* INT */     { false , true  , true    , true    , false },

                /* OBJECT */  { false , true  , true    , true    , true  },

                /* INTEGER */ { false , false , true    , true    , true  },

                /* VOID */    { true  , false , false   , false   , false },

                /* J_L_VOID */{ false , false , false   , false   , true  } };

        boolean needsConversion(RetTypeKind rk) {

            return needsConversion[rk.ordinal()][ordinal()];

        }

        static boolean[][] needsConversion = {

                //              VOID  | SHORT | INT     | INTEGER | NULL

                /* SHORT */   { false , false , false   , false   , false },

                /* INT */     { false , false , false   , true    , false },

                /* OBJECT */  { false , true  , true    , false   , false },

                /* INTEGER */ { false , false , true    , false   , false },

                /* VOID */    { false , false , false   , false   , false },

                /* J_L_VOID */{ true  , false , false   , false   , false } };

    }

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

        for (LambdaReturnKind lrk : LambdaReturnKind.values()) {

            for (RetTypeKind rk1 : RetTypeKind.values()) {

                for (RetTypeKind rk2 : RetTypeKind.values()) {

                    for (ExceptionKind ek1 : ExceptionKind.values()) {

                        for (ExceptionKind ek2 : ExceptionKind.values()) {

                            for (ArgTypeKind ak11 : ArgTypeKind.values()) {

                                for (ArgTypeKind ak12 : ArgTypeKind.values()) {

                                    pool.execute(

                                        new StructuralMostSpecificTest(lrk, rk1,

                                            rk2, ek1, ek2, ak11, ak12));

                                }

                            }

                        }

                    }

                }

            }

        }

        checkAfterExec();

    }

    LambdaReturnKind lrk;

    RetTypeKind rt1, rt2;

    ArgTypeKind ak1, ak2;

    ExceptionKind ek1, ek2;

    JavaSource source;

    DiagnosticChecker diagChecker;

    StructuralMostSpecificTest(LambdaReturnKind lrk, RetTypeKind rt1, RetTypeKind rt2,

            ExceptionKind ek1, ExceptionKind ek2, ArgTypeKind ak1, ArgTypeKind ak2) {

        this.lrk = lrk;

        this.rt1 = rt1;

        this.rt2 = rt2;

        this.ek1 = ek1;

        this.ek2 = ek2;

        this.ak1 = ak1;

        this.ak2 = ak2;

        this.source = new JavaSource();

        this.diagChecker = new DiagnosticChecker();

    }

    class JavaSource extends SimpleJavaFileObject {

        String template = "interface SAM1 {\n" +

                          "   #R1 m(#A1 a1) #E1;\n" +

                          "}\n" +

                          "interface SAM2 {\n" +

                          "   #R2 m(#A2 a1) #E2;\n" +

                          "}\n" +

                          "class Test {\n" +

                          "   void m(SAM1 s) { }\n" +

                          "   void m(SAM2 s) { }\n" +

                          "   { m(x->{ #LR }); }\n" +

                          "}\n";

        String source;

        public JavaSource() {

            super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);

            source = template.replaceAll("#LR", lrk.retStr)

                    .replaceAll("#R1", rt1.retTypeStr)

                    .replaceAll("#R2", rt2.retTypeStr)

                    .replaceAll("#A1", ak1.argTypeStr)

                    .replaceAll("#A2", ak2.argTypeStr)

                    .replaceAll("#E1", ek1.exceptionStr)

                    .replaceAll("#E2", ek2.exceptionStr);

        }

        @Override

        public CharSequence getCharContent(boolean ignoreEncodingErrors) {

            return source;

        }

    }

    public void run() {

        JavacTask ct = (JavacTask)comp.getTask(null, fm.get(), diagChecker,

                Arrays.asList("-XDverboseResolution=all,-predef,-internal,-object-init"),

                null, Arrays.asList(source));

        try {

            ct.analyze();

        } catch (Throwable ex) {

            throw new

                AssertionError("Error thron when analyzing the following source:\n" +

                    source.getCharContent(true));

        }

        check();

    }

    void check() {

        checkCount.incrementAndGet();

        if (!lrk.compatibleWith(rt1) || !lrk.compatibleWith(rt2))

            return;

        if (lrk.needsConversion(rt1) != lrk.needsConversion(rt2))

            return;

        boolean m1MoreSpecific = moreSpecific(rt1, rt2, ek1, ek2, ak1, ak2);

        boolean m2MoreSpecific = moreSpecific(rt2, rt1, ek2, ek1, ak2, ak1);

        boolean ambiguous = (m1MoreSpecific == m2MoreSpecific);

        if (ambiguous != diagChecker.ambiguityFound) {

            throw new Error("invalid diagnostics for source:\n" +

                source.getCharContent(true) +

                "\nAmbiguity found: " + diagChecker.ambiguityFound +

                "\nm1 more specific: " + m1MoreSpecific +

                "\nm2 more specific: " + m2MoreSpecific +

                "\nexpected ambiguity: " + ambiguous);

        }

        if (!ambiguous) {

            String sigToCheck = m1MoreSpecific ? "m(SAM1)" : "m(SAM2)";

            if (!sigToCheck.equals(diagChecker.mostSpecificSig)) {

                throw new Error("invalid most specific method selected:\n" +

                source.getCharContent(true) +

                "\nMost specific found: " + diagChecker.mostSpecificSig +

                "\nm1 more specific: " + m1MoreSpecific +

                "\nm2 more specific: " + m2MoreSpecific);

            }

        }

    }

    boolean moreSpecific(RetTypeKind rk1, RetTypeKind rk2, ExceptionKind ek1,

            ExceptionKind ek2, ArgTypeKind ak1, ArgTypeKind ak2) {

        if (!rk1.moreSpecificThan(rk2))

            return false;

        if (ak1 != ak2)

            return false;

        return true;

    }

    static class DiagnosticChecker

        implements javax.tools.DiagnosticListener<JavaFileObject> {

        boolean ambiguityFound;

        String mostSpecificSig;

        public void report(Diagnostic<? extends JavaFileObject> diagnostic) {

            try {

                if (diagnostic.getKind() == Diagnostic.Kind.ERROR &&

                        diagnostic.getCode().equals("compiler.err.ref.ambiguous")) {

                    ambiguityFound = true;

                } else if (diagnostic.getKind() == Diagnostic.Kind.NOTE &&

                        diagnostic.getCode()

                        .equals("compiler.note.verbose.resolve.multi")) {

                    ClientCodeWrapper.DiagnosticSourceUnwrapper dsu =

                        (ClientCodeWrapper.DiagnosticSourceUnwrapper)diagnostic;

                    JCDiagnostic.MultilineDiagnostic mdiag =

                        (JCDiagnostic.MultilineDiagnostic)dsu.d;

                    int mostSpecificIndex = (Integer)mdiag.getArgs()[2];

                    mostSpecificSig =

                        ((JCDiagnostic)mdiag.getSubdiagnostics()

                            .get(mostSpecificIndex)).getArgs()[1].toString();

                }

            } catch (RuntimeException t) {

                t.printStackTrace();

                throw t;

            }

        }

    }

}