/*

 * Copyright (c) 2013, 2016, 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.

 */

import java.util.Arrays;

import java.util.List;

import java.util.Collections;

import java.util.ArrayList;

import java.io.File;

import java.io.Writer;

import java.io.FileWriter;

import java.io.IOException;

import java.io.BufferedReader;

import java.nio.file.Files;

import java.nio.file.Paths;

import java.nio.file.StandardCopyOption;

import java.nio.charset.Charset;

import jdk.test.lib.JDKToolFinder;

import jdk.test.lib.process.OutputAnalyzer;

import jdk.test.lib.process.ProcessTools;

public abstract class CtwTest {

    private static final String LOG_FILE = "ctw.log";

    private static final String[] CTW_COMMAND = {

        "-Xbootclasspath/a:.",

        "-XX:+UnlockDiagnosticVMOptions",

        "-XX:+WhiteBoxAPI",

        "-Dsun.hotspot.tools.ctw.logfile=" + LOG_FILE,

        "--add-exports", "java.base/jdk.internal.jimage=ALL-UNNAMED",

        "--add-exports", "java.base/jdk.internal.misc=ALL-UNNAMED",

        "--add-exports", "java.base/jdk.internal.reflect=ALL-UNNAMED",

        sun.hotspot.tools.ctw.CompileTheWorld.class.getName(),

    };

    protected final String[] shouldContain;

    protected CtwTest(String[] shouldContain) {

        this.shouldContain = shouldContain;

    }

    public void run(String[] args) throws Exception {

        if (args.length == 0) {

            throw new Error("args is empty");

        }

        switch (args[0]) {

            case "prepare":

                prepare();

                break;

            case "check":

                check();

                break;

            case "compile":

                compile(args);

                break;

            default:

                throw new Error("unregonized action -- " + args[0]);

        }

    }

    protected void prepare() throws Exception { }

    protected void check() throws Exception  {

        try (BufferedReader r = Files.newBufferedReader(Paths.get(LOG_FILE),

                Charset.defaultCharset())) {

            OutputAnalyzer output = readOutput(r);

            for (String test : shouldContain) {

                output.shouldContain(test);

            }

        }

    }

    protected void compile(String[] args) throws Exception {

        // concat CTW_COMMAND and args w/o 0th element

        String[] cmd = Arrays.copyOf(CTW_COMMAND, CTW_COMMAND.length + args.length - 1);

        System.arraycopy(args, 1, cmd, CTW_COMMAND.length, args.length - 1);

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(true, cmd);

        OutputAnalyzer output = new OutputAnalyzer(pb.start());

        dump(output, "compile");

        output.shouldHaveExitValue(0);

    }

    private static OutputAnalyzer readOutput(BufferedReader reader)

            throws IOException {

        StringBuilder builder = new StringBuilder();

        String eol = String.format("%n");

        String line;

        while ((line = reader.readLine()) != null) {

            builder.append(line);

            builder.append(eol);

        }

        return new OutputAnalyzer(builder.toString(), "");

    }

    protected void dump(OutputAnalyzer output, String name) {

        try (Writer w = new FileWriter(name + ".out")) {

            String s = output.getStdout();

            w.write(s, s.length(), 0);

        } catch (IOException io) {

            io.printStackTrace();

        }

        try (Writer w = new FileWriter(name + ".err")) {

            String s = output.getStderr();

            w.write(s, s.length(), 0);

        } catch (IOException io) {

            io.printStackTrace();

        }

    }

    protected ProcessBuilder createJarProcessBuilder(String... command)

            throws Exception {

        String javapath = JDKToolFinder.getJDKTool("jar");

        ArrayList<String> args = new ArrayList<>();

        args.add(javapath);

        Collections.addAll(args, command);

        return new ProcessBuilder(args.toArray(new String[args.size()]));

    }

}