/*

 * Copyright (c) 2015, 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

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 */

package compiler.compilercontrol.share.processors;

import com.sun.management.HotSpotDiagnosticMXBean;

import compiler.compilercontrol.share.method.MethodDescriptor;

import compiler.compilercontrol.share.method.MethodGenerator;

import compiler.compilercontrol.share.scenario.State;

import jdk.test.lib.OutputAnalyzer;

import java.lang.management.ManagementFactory;

import java.lang.reflect.Executable;

import java.util.List;

import java.util.Map;

import java.util.function.Consumer;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import java.util.stream.Collectors;

/**

 * Process output to find compiled methods assemblies printed by print command

 */

public class PrintProcessor implements Consumer<OutputAnalyzer> {

    /**

     * Compiled method string pattern.

     * Capturing groups are

     * 1. Compiler used to compile this method

     * 2. Time stamp

     * 3. Compile ID

     * 4. Method attributes

     * 5. Compilation level

     * 6. Method name

     */

    private static final Pattern COMPILED_METHOD

            = Pattern.compile("Compiled method (?<compiler>\\(.*\\))[ ]+"

            + "(?<time>[0-9]+)[ ]+(?<id>[0-9]+) (?<attr>[ !%sbn]{6})"

            + "(?<level>[0-9]+)[ ]+(?<name>[^ ]+).*");

    private final List<String> printMethods;

    private final List<String> testMethods;

    public PrintProcessor(Map<Executable, State> states) {

        printMethods = states.keySet().stream()

                .filter(x -> states.get(x).isPrintAssembly())

                .map(MethodGenerator::logDescriptor)

                .map(MethodDescriptor::getString)

                .map(s -> s.replaceFirst("\\(.*", "")) // remove signature

                .collect(Collectors.toList());

        testMethods = new PoolHelper().getAllMethods()

                .stream()

                .map(pair -> pair.first)

                .map(MethodGenerator::logDescriptor)

                .map(MethodDescriptor::getString)

                .map(s -> s.replaceFirst("\\(.*", "")) // remove signature

                .collect(Collectors.toList());

    }

    @Override

    public void accept(OutputAnalyzer outputAnalyzer) {

        boolean wizardMode = false;

        try {

            wizardMode = Boolean.parseBoolean(ManagementFactory

                    .getPlatformMXBean(HotSpotDiagnosticMXBean.class)

                    .getVMOption("WizardMode").getValue());

        } catch (IllegalArgumentException e) {

            // ignore exception because WizardMode exists in debug only builds

        }

        if (wizardMode) {

            System.out.println("SKIP: WizardMode's output are not supported");

            return;

        }

        for (String line : outputAnalyzer.asLines()) {

            Matcher matcher = COMPILED_METHOD.matcher(line);

            if (matcher.matches()) {

                String method = normalize(matcher.group("name"));

                if (!printMethods.contains(normalize(method))

                        && testMethods.contains(method)) {

                    System.out.println(outputAnalyzer.getOutput());

                    throw new AssertionError("FAILED: wrong method "

                            + "was printed: " + method + " LINE: " + line);

                }

            }

        }

    }

    // Normalize given signature to conform regular expression used in tests

    private String normalize(String method) {

        return method.replaceAll("\\.", "/") // replace dots in a class string

                .replaceFirst("::", ".")     // replace :: between class and method

                .replace("&lt;", "<")

                .replace(">", ">");

    }

}