/*

 * Copyright (c) 2009, 2019, 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.

 *

 */

package shared;

import java.io.File;

import java.io.FileOutputStream;

import java.util.Arrays;

import java.util.Map;

import java.util.List;

import java.util.ArrayList;

public abstract class AbstractGenerator {

    protected final boolean dumpClasses;

    protected final boolean executeTests;

    private static int testNum = 0;

    protected AbstractGenerator(String[] args) {

        List<String> params = new ArrayList<String>(Arrays.asList(args));

        if (params.contains("--help")) {

            Utils.printHelp();

            System.exit(0);

        }

        dumpClasses = params.contains("--dump");

        executeTests = !params.contains("--noexecute");

        params.remove("--dump");

        params.remove("--noexecute");

        Utils.init(params);

    }

    /*******************************************************************/

    public static void writeToFile(File dir, Map<String, byte[]> classes) {

        for (String name : classes.keySet()) {

            try {

                writeToFile(dir, name, classes.get(name));

            } catch (Exception e) {

                throw new RuntimeException(e);

            }

        }

    }

    /*******************************************************************/

    public static void writeToFile(File dir, String fullName, byte[] classBytecode) {

        if (!dir.isDirectory()) {

            throw new RuntimeException("Invalid parameter: dir doesn't point to an existing directory");

        }

        File classFile =

            new File(

                    dir.getPath() + File.separator

                    + fullName.replaceAll("\\.", File.separator)

                    + ".class"

                    );

        classFile.getParentFile().mkdirs();

        try {

            FileOutputStream fos = new FileOutputStream(classFile);

            try {

                fos.write(classBytecode);

            } finally {

                fos.close();

            }

        } catch (Exception e) {

            throw new RuntimeException(e);

        }

    }

    protected boolean exec(Map<String, byte[]> classes, String description, String calleeClassName, String classNameC, String[] callSites) throws ClassNotFoundException {

        boolean isPassed = true;

        testNum++;

        String caseDescription = String.format("%4d| %s", testNum, description);

        // Create test executor for a single case

        classes.put(

                ExecutorGenerator.className

                , new ExecutorGenerator(

                        caseDescription

                        , calleeClassName

                        , classNameC

                    ).generateExecutor(callSites)

        );

        // Dump generated set to disk, if needed

        if (dumpClasses) {

            File dir = new File("classes" + File.separator + String.format("%04d", testNum));

            dir.mkdirs();

            writeToFile(dir, classes);

        }

        ByteArrayClassLoader loader = new ByteArrayClassLoader(classes);

        Class paramClass;

        Class targetClass;

        Checker checker;

        try {

            paramClass = loader.loadClass(calleeClassName);

            targetClass = loader.loadClass(classNameC);

            checker = getChecker(paramClass, targetClass);

        } catch (Throwable e) {

            String result = Checker.abbreviateResult(e.getClass().getName());

            System.out.printf(caseDescription);

            for (String site : callSites) {

                System.out.printf(" %7s", result);

            }

            System.out.println("");

            return true;

        }

        if (executeTests) {

            // Check runtime behavior

            Caller caller = new Caller(loader, checker, paramClass, targetClass);

            boolean printedCaseDes = false;

            for (String site : callSites) {

                String callResult = caller.call(site);

                if (!caller.isPassed()) {

                    isPassed = false;

                    if (!printedCaseDes) {

                        System.out.printf(caseDescription);

                        printedCaseDes = true;

                    }

                    System.out.printf(" %7s", callResult);

                }

            }

            if (!caller.isPassed()) {

                System.out.println(" |   FAILED");

            }

        } else {

            for (String site : callSites) {

                String result = checker.check(loader.loadClass(site));

                System.out.printf(" %7s", Checker.abbreviateResult(result));

            }

        }

        return isPassed;

    }

    protected abstract Checker getChecker(Class paramClass, Class targetClass);

}