/*

 * Copyright 2007 Sun Microsystems, Inc.  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.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun in the LICENSE file that accompanied this code.

 *

 * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package org.apidesign.infra.ant;

import java.io.ByteArrayInputStream;

import java.io.File;

import java.io.FileOutputStream;

import java.io.FileWriter;

import java.io.InputStream;

import java.net.URL;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import junit.framework.Test;

import org.netbeans.junit.NbTestCase;

import org.netbeans.junit.NbTestSuite;

/**

 *

 * @author Jaroslav Tulach

 */

public class GrepTest extends NbTestCase {

    private static File workDir;

    public GrepTest(String s) {

        super(s);

    }

    public static Test suite() {

        return new NbTestSuite(GrepTest.class);

        //return new GrepTest("testInXML");

    }

    @Override

    protected void setUp() throws Exception {

        clearWorkDir();

    }

    public void testMissingMethodInAnInterfaceIsDetected() throws Exception {

        String c1 =

            "package ahoj;\n" +

            "// BEGIN: xyz\n" +

            "public interface I {\n" +

            "// FINISH: xyz\n" +

            "  public void get();\n" +

            "}" +

            "";

        File src = createFile(1, "I.java", c1);

        String c2 =

            "@xyz@";

        File txt = createFile(2, "in.txt", c2);

        File out = createFile(3, "out.txt", "");

        out.delete();

        execute(1, 2, "-Dfile1=" + txt, "-Dfile2=" + out, "-Dinclude1=*.java");

        assertTrue("output created", out.canRead());

        String r = readFile(out);

        assertEquals("public interface I {\n}\n", r);

    }

    public void testSpacesAtBeginingAreStripped() throws Exception {

        String c1 =

            "package ahoj;\n" +

            "// BEGIN: xyz\n" +

            "   public interface I {\n" +

            "     public void ahoj();\n" +

            "   }\n" +

            "// END: xyz\n" +

            "  public void get();\n" +

            "}" +

            "";

        File src = createFile(1, "I.java", c1);

        String c2 =

            "@xyz@";

        File txt = createFile(2, "in.txt", c2);

        File out = createFile(3, "out.txt", "");

        out.delete();

        execute(1, 2, "-Dfile1=" + txt, "-Dfile2=" + out, "-Dinclude1=*.java");

        assertTrue("output created", out.canRead());

        String r = readFile(out);

        String result = "public interface I {\n" +

            "  public void ahoj();\n" +

            "}\n";

        assertEquals(result, r);

    }

    public void testReportUnpairedBracesAsError() throws Exception {

        String c1 =

            "package ahoj;\n" +

            "// BEGIN: xyz\n" +

            "   public interface I {\n" +

            "     public void ahoj();\n" +

            "// END: xyz\n" +

            "   }\n" +

            "  public void get();\n" +

            "}" +

            "";

        File src = createFile(1, "I.java", c1);

        String c2 =

            "@xyz@";

        File txt = createFile(2, "in.txt", c2);

        File out = createFile(3, "out.txt", "");

        out.delete();

        try {

            execute(1, 2, "-Dfile1=" + txt, "-Dfile2=" + out, "-Dinclude1=*.java");

        } catch (ExecuteUtils.ExecutionError ex) {

            // ok

            return;

        }

        fail("The execution of the script shall fail");

    }

    public void testIncludedTexts() throws Exception {

        String c1 =

            "package ahoj;\n" +

            "// BEGIN: clazz\n" +

            "public interface I {\n" +

            "  // BEGIN: method\n" +

            "  public void get();\n" +

            "  // END: method\n" +

            "}\n" +

            "// END: clazz\n" +

            "";

        File src = createFile(1, "I.java", c1);

        String c2 =

            "@clazz@";

        File txt = createFile(2, "in.txt", c2);

        File out = createFile(3, "out.txt", "");

        out.delete();

        execute(1, 2, "-Dfile1=" + txt, "-Dfile2=" + out, "-Dinclude1=*.java");

        assertTrue("output created", out.canRead());

        String r = readFile(out);

        if (r.indexOf("BEGIN") >= 0) {

            fail("BEGIN is there: " + r);

        }

        if (r.indexOf("END") >= 0) {

            fail("END is there: " + r);

        }

        if (r.indexOf("interface I") < 0) {

            fail("Missing interface: " + r);

        }

        if (r.indexOf("void get()") < 0) {

            fail("Missing get: " + r);

        }

    }

    public void testIncludedTextsAmper() throws Exception {

        String c1 =

            "package ahoj;\n" +

            "public class C {\n" +

            "  // BEGIN: method\n" +

            "  public void change(int x) { x &= 10; }\n" +

            "  // END: method\n" +

            "}\n" +

            "";

        File src = createFile(1, "C.java", c1);

        String c2 =

            "@method@";

        File txt = createFile(2, "in.txt", c2);

        File out = createFile(3, "out.txt", "");

        out.delete();

        execute(1, 2, "-Dfile1=" + txt, "-Dfile2=" + out, "-Dinclude1=*.java");

        assertTrue("output created", out.canRead());

        String r = readFile(out);

        if (r.indexOf("&=") < 0) {

            fail("No XML: " + r);

        }

        if (r.indexOf("&=") >= 0) {

            fail("No XML, we need &: " + r);

        }

    }

    public void testIncludedTextsAmperAndGenerics() throws Exception {

        String c1 =

"package org.apidesign.api.security;\n" +

"" +

"import java.nio.ByteBuffer;\n" +

"import java.util.ServiceLoader;\n" +

"import org.apidesign.spi.security.Digestor;\n" +

"\n" +

"/** Simplified version of a Digest class that allows to compute a fingerprint\n" +

" * for buffer of data.\n" +

" *\n" +

" * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>\n" +

" */\n" +

"// BEGIN: day.end.bridges.Digest\n" +

"public final class Digest {\n" +

"    private final DigestImplementation<?> impl;\n" +

"    \n" +

"    /** Factory method is better than constructor */\n" +

"    private Digest(DigestImplementation<?> impl) {\n" +

"        this.impl = impl;\n" +

"    }\n" +

"    \n" +

"    /** Factory method to create digest for an algorithm.\n" +

"     */\n" +

"    public static Digest getInstance(String algorithm) {\n" +

"        for (Digestor<?> digestor : ServiceLoader.load(Digestor.class)) {\n" +

"            DigestImplementation<?> impl = \n" +

                "DigestImplementation.create(digestor, algorithm);\n" +

"            if (impl != null) {\n" +

"                return new Digest(impl);\n" +

"            }\n" +

"        }\n" +

"        throw new IllegalArgumentException(algorithm);\n" +

"    }\n" +

"      \n" +

"    //\n" +

"    // these methods are kept the same as in original MessageDigest,\n" +

"    // but for simplicity choose just some from the original API\n" +

"    //\n" +

"    \n" +

"    public byte[] digest(ByteBuffer bb) {\n" +

"        return impl.digest(bb);\n" +

"    }\n" +

"}\n" +

"// END: day.end.bridges.Digest\n";

        File src = createFile(1, "C.java", c1);

        String c2 =

            "@day.end.bridges.Digest@";

        File txt = createFile(2, "in.txt", c2);

        File out = createFile(3, "out.txt", "");

        out.delete();

        execute(1, 2, "-Dfile1=" + txt, "-Dfile2=" + out, "-Dinclude1=*.java");

        assertTrue("output created", out.canRead());

        String r = readFile(out);

        if (r.indexOf("&=") >= 0) {

            fail("Wrong XML: " + r);

        }

        if (r.indexOf("&") > -1) {

            fail("Wrong XML, no &: " + r);

        }

    }

    public void testInXML() throws Exception {

        String c1 =

            "<!-- BEGIN: clazz -->\n" +

            "<interface name='I'/>\n" +

            "<!-- END: clazz -->\n" +

            "";

        File src = createFile(1, "I.xml", c1);

        String c2 =

            "@clazz@";

        File txt = createFile(2, "in.txt", c2);

        File out = createFile(3, "out.txt", "");

        out.delete();

        execute(1, 2, "-Dfile1=" + txt, "-Dfile2=" + out, "-Dinclude1=*.xml");

        assertTrue("output created", out.canRead());

        String r = readFile(out);

        if (r.indexOf("BEGIN") >= 0) {

            fail("BEGIN is there: " + r);

        }

        if (r.indexOf("END") >= 0) {

            fail("END is there: " + r);

        }

        if (r.indexOf("<interface name='I'/>") < 0) {

            fail("Missing interface: " + r);

        }

    }

    public void testLongLineNotDetectedAsBeginsWithGen() throws Exception {

        String c1 =

"package org.apidesign.api.security;\n" +

"" +

"import java.nio.ByteBuffer;\n" +

"import java.util.ServiceLoader;\n" +

"import org.apidesign.spi.security.Digestor;\n" +

"\n" +

"/** Simplified version of a Digest class that allows to compute a fingerprint\n" +

"// BEGIN: x\n" +

" * for buffer of data.\n" +

"// END: x\n" +

" *\n" +

" * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>\n" +

" */\n" +

"// GEN-BEGIN: day.end.bridges.Digest\n" +

"d;   DigestImplementation<?> impl = DigestImplementation.create(digestor, algorithm);\n" +

"// GEN-END: day.end.bridges.Digest\n";

        File src = createFile(1, "C.java", c1);

        String c2 =

            "@day.end.bridges.Digest@";

        File txt = createFile(2, "in.txt", c2);

        File out = createFile(3, "out.txt", "");

        out.delete();

        execute(1, 2, "-Dfile1=" + txt, "-Dfile2=" + out, "-Dinclude1=*.java");

    }

    public void testLongLineDetected() throws Exception {

        String c1 =

"package org.apidesign.api.security;\n" +

"" +

"import java.nio.ByteBuffer;\n" +

"import java.util.ServiceLoader;\n" +

"import org.apidesign.spi.security.Digestor;\n" +

"\n" +

"/** Simplified version of a Digest class that allows to compute a fingerprint\n" +

" * for buffer of data.\n" +

" *\n" +

" * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>\n" +

" */\n" +

"// BEGIN: day.end.bridges.Digest\n" +

"d;   DigestImplementation<?> impl = DigestImplementation.create(digestor, algorithm);\n" +

"// END: day.end.bridges.Digest\n";

        File src = createFile(1, "C.java", c1);

        String c2 =

            "@day.end.bridges.Digest@";

        File txt = createFile(2, "in.txt", c2);

        File out = createFile(3, "out.txt", "");

        out.delete();

        try {

            execute(1, 2, "-Dfile1=" + txt, "-Dfile2=" + out, "-Dinclude1=*.java");

        } catch (ExecuteUtils.ExecutionError ex) {

            // OK

            return;

        }

        fail("Should fail, as there is long line");

    }

    public void testLongNotLineDetectedAsShortened() throws Exception {

        String c1 =

"package org.apidesign.api.security;\n" +

"" +

"import java.nio.ByteBuffer;\n" +

"import java.util.ServiceLoader;\n" +

"import org.apidesign.spi.security.Digestor;\n" +

"\n" +

"/** Simplified version of a Digest class that allows to compute a fingerprint\n" +

" * for buffer of data.\n" +

" *\n" +

" * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>\n" +

" */\n" +

"// BEGIN: day.end.bridges.Digest\n" +

"   DigestImplementation<?> impl = DigestImplementation.create(digestor, algorithm);\n" +

"// END: day.end.bridges.Digest\n";

        File src = createFile(1, "C.java", c1);

        String c2 =

            "@day.end.bridges.Digest@";

        File txt = createFile(2, "in.txt", c2);

        File out = createFile(3, "out.txt", "");

        out.delete();

        execute(1, 2, "-Dfile1=" + txt, "-Dfile2=" + out, "-Dinclude1=*.java");

    }

    public void testNotClosedSection() throws Exception {

        String c1 =

            "package ahoj;\n" +

            "// BEGIN: clazz\n" +

            "int x;\n" +

            "\n";

        File src = createFile(1, "I.java", c1);

        String c2 =

            "@clazz@";

        File txt = createFile(2, "in.txt", c2);

        File out = createFile(3, "out.txt", "");

        out.delete();

        try {

            execute(1, 2, "-Dfile1=" + txt, "-Dfile2=" + out, "-Dinclude1=*.java");

            fail("Has to fail");

        } catch (ExecuteUtils.ExecutionError ex) {

            // ok

        }

    }

    public void testLongNotLineDetectedAsNotInTheList() throws Exception {

        String c1 =

"package org.apidesign.api.security;\n" +

"" +

"import java.nio.ByteBuffer;\n" +

"import java.util.ServiceLoader;\n" +

"import org.apidesign.spi.security.Digestor;\n" +

"\n" +

"/** Simplified version of a Digest class that allows to compute a fingerprint\n" +

" * for buffer of data.\n" +

" *\n" +

" * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>\n" +

" */\n" +

"   DigestImplementation<?> impl    =      DigestImplementation.create(digestor, algorithm);\n" +

"// BEGIN: day.end.bridges.Digest\n" +

"   DigestImplementation<?> impl    =      null\n" +

"// END: day.end.bridges.Digest\n";

        File src = createFile(1, "C.java", c1);

        String c2 =

            "@day.end.bridges.Digest@";

        File txt = createFile(2, "in.txt", c2);

        File out = createFile(3, "out.txt", "");

        out.delete();

        execute(1, 2, "-Dfile1=" + txt, "-Dfile2=" + out, "-Dinclude1=*.java");

    }

    protected final File createFile(int slot, String name, String content) throws Exception {

        File d1 = new File(getWorkDir(), "dir" + slot);

        File c1 = new File(d1, name);

        copy(content, c1);

        return c1;

    }

    protected final void execute(int slotFirst, int slotSecond, String... additionalArgs) throws Exception {

        File d1 = new File(getWorkDir(), "dir" + slotFirst);

        File d2 = new File(getWorkDir(), "dir" + slotSecond);

        File build = new File(getWorkDir(), "build.xml");

        extractResource("build.xml", build);

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

        args.addAll(Arrays.asList(additionalArgs));

        args.add("-Ddir1=" + d1);

        args.add("-Ddir2=" + d2);

        ExecuteUtils.execute(build, args.toArray(new String[0]));

    }

    private static final void copy(String txt, File f) throws Exception {

        f.getParentFile().mkdirs();

        FileWriter w = new FileWriter(f);

        w.append(txt);

        w.close();

    }

    final File extractResource(String res, File f) throws Exception {

        URL u = GrepTest.class.getResource(res);

        assertNotNull ("Resource should be found " + res, u);

        FileOutputStream os = new FileOutputStream(f);

        InputStream is = u.openStream();

        for (;;) {

            int ch = is.read ();

            if (ch == -1) {

                break;

            }

            os.write (ch);

        }

        os.close ();

        return f;

    }

    final static String readFile (java.io.File f) throws java.io.IOException {

        int s = (int)f.length ();

        byte[] data = new byte[s];

        assertEquals ("Read all data", s, new java.io.FileInputStream (f).read (data));

        return new String (data);

    }

    final File extractString (String res, String nameExt) throws Exception {

        File f = new File(getWorkDir(), nameExt);

        f.deleteOnExit ();

        FileOutputStream os = new FileOutputStream(f);

        InputStream is = new ByteArrayInputStream(res.getBytes("UTF-8"));

        for (;;) {

            int ch = is.read ();

            if (ch == -1) {

                break;

            }

            os.write (ch);

        }

        os.close ();

        return f;

    }

}