/*

 * Copyright (c) 2014, 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.io.File;

import java.io.IOException;

import java.util.List;

import java.util.Map;

import java.util.Objects;

import java.util.stream.Stream;

import javax.tools.JavaCompiler;

import javax.tools.JavaFileObject;

import javax.tools.ToolProvider;

import static java.lang.String.format;

import static java.util.Collections.emptyList;

import static java.util.stream.Collectors.toList;

public class TestBase {

    public Map<String, ? extends JavaFileObject> compile(String... sources) throws IOException,

            CompilationException {

        return compile(emptyList(), sources);

    }

    /**

     * @param options -  compiler options

     * @param sources

     * @return map where key is className, value is corresponding ClassFile.

     * @throws IOException

     */

    public Map<String, ? extends JavaFileObject> compile(List<String> options, String... sources) throws IOException,

            CompilationException {

        JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();

        List<? extends JavaFileObject> src = Stream.of(sources).map(ToolBox.JavaSource::new).collect(toList());

        try (InMemoryFileManager fileManager = new InMemoryFileManager(compiler.getStandardFileManager(null, null, null))) {

            boolean success = compiler.getTask(null, fileManager, null, options, null, src).call();

            if (!success) throw new CompilationException("Compilation Error");

            return fileManager.getClasses();

        }

    }

    public void assertEquals(Object actual, Object expected, String message) {

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

            throw new AssertionFailedException(format("%s%nGot: %s, Expected: ", message, actual, expected));

    }

    public void assertNull(Object actual, String message) {

        assertEquals(actual, null, message);

    }

    public void assertNotNull(Object actual, String message) {

        if (Objects.isNull(actual)) {

            throw new AssertionFailedException(message + " : Expected not null value");

        }

    }

    public void assertTrue(boolean actual, String message) {

        assertEquals(actual, true, message);

    }

    public File getSourceFile(String fileName) {

        return new File(System.getProperty("test.src", "."), fileName);

    }

    public File getClassFile(String fileName) {

        return new File(System.getProperty("test.classes", TestBase.class.getResource(".").getPath()), fileName);

    }

    public File getClassFile(Class clazz) {

        return getClassFile(clazz.getName().replace(".", "/") + ".class");

    }

    public static class CompilationException extends Exception {

        public CompilationException(String message) {

            super(message);

        }

    }

    public static class AssertionFailedException extends RuntimeException {

        public AssertionFailedException(String message) {

            super(message);

        }

    }

}