/*

 * Copyright (c) 2002, 2013, 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.

 */

/*

 * @test

 * @bug 4524350 4662945 4633447

 * @summary stddoclet: {@docRoot} inserts an extra trailing "/"

 * @author dkramer

 * @run main DocRootSlash

 */

import com.sun.javadoc.*;

import java.util.*;

import java.io.*;

import java.nio.*;

import java.util.regex.*;

/**

 * Runs javadoc and runs regression tests on the resulting HTML.

 * It reads each file, complete with newlines, into a string to easily

 * find strings that contain newlines.

 */

public class DocRootSlash

{

    private static final String BUGID = "4524350, 4662945, or 4633447";

    private static final String BUGNAME = "DocRootSlash";

    private static final String FS = System.getProperty("file.separator");

    private static final String PS = System.getProperty("path.separator");

    private static final String TMPDIR_STRING1 = "." + FS + "docs1" + FS;

    // Test number.  Needed because runResultsOnHTMLFile is run twice, and subtestNum

    // should increment across test runs.

    public static int subtestNum = 0;

    public static int numOfSubtestsPassed = 0;

    // Entry point

    public static void main(String[] args) {

        // Directory that contains source files that javadoc runs on

        String srcdir = System.getProperty("test.src", ".");

        runJavadoc(new String[] {"-d", TMPDIR_STRING1,

                                 "-Xdoclint:none",

                                 "-overview", (srcdir + FS + "overview.html"),

                                 "-header", "<A HREF=\"{@docroot}/package-list\">{&#064;docroot}</A> <A HREF=\"{@docRoot}/help-doc\">{&#064;docRoot}</A>",

                                 "-sourcepath", srcdir,

                                 "p1", "p2"});

        runTestsOnHTMLFiles(filenameArray);

        printSummary();

    }

    /** Run javadoc */

    public static void runJavadoc(String[] javadocArgs) {

        if (com.sun.tools.javadoc.Main.execute(javadocArgs) != 0) {

            throw new Error("Javadoc failed to execute");

        }

    }

    /**  The array of filenames to test */

    private static final String[] filenameArray = {

        TMPDIR_STRING1 + "p1" + FS + "C1.html" ,

        TMPDIR_STRING1 + "p1" + FS + "package-summary.html",

        TMPDIR_STRING1 + "overview-summary.html"

    };

    public static void runTestsOnHTMLFiles(String[] filenameArray) {

        String fileString;

        // Bugs 4524350 4662945

        for (int i = 0; i < filenameArray.length; i++ ) {

            // Read contents of file (whose filename is in filenames) into a string

            fileString = readFileToString(filenameArray[i]);

            System.out.println("\nSub-tests for file: " + filenameArray[i]

                                + " --------------");

            // Loop over all tests in a single file

            for ( int j = 0; j < 11; j++ ) {

                subtestNum += 1;

                // Compare actual to expected string for a single subtest

                compareActualToExpected(fileString);

            }

        }

        // Bug 4633447: Special test for overview-frame.html

        // Find two strings in file "overview-frame.html"

        String filename = TMPDIR_STRING1 + "overview-frame.html";

        fileString = readFileToString(filename);

        // Find first string <A HREF="./package-list"> in overview-frame.html

        subtestNum += 1;

        String stringToFind = "<A HREF=\"./package-list\">";

        String result;

        if ( fileString.indexOf(stringToFind) == -1 ) {

            result = "FAILED";

        } else {

            result = "succeeded";

            numOfSubtestsPassed += 1;

        }

        System.out.println("\nSub-test " + (subtestNum)

            + " for bug " + BUGID + " (" + BUGNAME + ") " + result + "\n"

            + "when searching for:\n"

            + stringToFind + "\n"

            + "in file " + filename);

        // Find second string <A HREF="./help-doc"> in overview-frame.html

        subtestNum += 1;

        stringToFind = "<A HREF=\"./help-doc\">";

        if ( fileString.indexOf(stringToFind) == -1 ) {

            result = "FAILED";

        } else {

            result = "succeeded";

            numOfSubtestsPassed += 1;

        }

        System.out.println("\nSub-test " + (subtestNum)

            + " for bug " + BUGID + " (" + BUGNAME + ") " + result + "\n"

            + "when searching for:\n"

            + stringToFind + "\n"

            + "in file " + filename);

    }

    public static void printSummary() {

        System.out.println("");

        if ( numOfSubtestsPassed == subtestNum ) {

            System.out.println("\nAll " + numOfSubtestsPassed + " subtests passed");

        } else {

            throw new Error("\n" + (subtestNum - numOfSubtestsPassed) + " of " + (subtestNum)

                            + " subtests failed for bug " + BUGID + " (" + BUGNAME + ")\n");

        }

    }

    // Read the contents of the file into a String

    public static String readFileToString(String filename) {

        try {

            File file = new File(filename);

            if ( !file.exists() ) {

                System.out.println("\nFILE DOES NOT EXIST: " + filename);

            }

            BufferedReader in = new BufferedReader(new FileReader(file));

            // Create an array of characters the size of the file

            char[] allChars = new char[(int)file.length()];

            // Read the characters into the allChars array

            in.read(allChars, 0, (int)file.length());

            in.close();

            // Convert to a string

            String allCharsString = new String(allChars);

            return allCharsString;

        } catch (FileNotFoundException e) {

            System.err.println(e);

            return "";

        } catch (IOException e) {

            System.err.println(e);

            return "";

        }

    }

    /**

     * Regular expression pattern matching code adapted from Eric's

     * /java/pubs/dev/linkfix/src/LinkFix.java

     *

     * Prefix Pattern:

     * flag   (?i)            (case insensitive, so "a href" == "A HREF" and all combinations)

     * group1 (

     *          <a or <A

     *          \\s+          (one or more whitespace characters)

     *          href or HREF

     *          \"            (double quote)

     *        )

     * group2 ([^\"]*)        (link reference -- characters that don't include a quote)

     * group3 (\".*?>)        (" target="frameName">)

     * group4 (.*?)           (label - zero or more characters)

     * group5 (</a>)          (end tag)

     */

    static String prefix = "(?i)(<a\\s+href=";    // <a href=     (start group1)

    static String ref1   = "\")([^\"]*)(\".*?>)"; // doublequotes (end group1, group2, group3)

    static String ref2   = ")(\\S+?)([^<>]*>)";   // no quotes    (end group1, group2, group3)

    static String label  = "(.*?)";               // text label   (group4)

    static String end    = "(</a>)";              // </a>         (group5)

    /**

     * Compares the actual string to the expected string in the specified string

     * str   String to search through

     */

    static void compareActualToExpected(String str) {

        // Pattern must be compiled each run because subtestNum is incremented

        Pattern actualLinkPattern1 =

            Pattern.compile("Sub-test " + subtestNum + " Actual: " + prefix + ref1, Pattern.DOTALL);

        Pattern expectLinkPattern1 =

            Pattern.compile("Sub-test " + subtestNum + " Expect: " + prefix + ref1, Pattern.DOTALL);

        // Pattern linkPattern2 = Pattern.compile(prefix + ref2 + label + end, Pattern.DOTALL);

        CharBuffer charBuffer = CharBuffer.wrap(str);

        Matcher actualLinkMatcher1 = actualLinkPattern1.matcher(charBuffer);

        Matcher expectLinkMatcher1 = expectLinkPattern1.matcher(charBuffer);

        String result;

        if ( expectLinkMatcher1.find() && actualLinkMatcher1.find() ) {

            String expectRef = expectLinkMatcher1.group(2);

            String actualRef = actualLinkMatcher1.group(2);

            if ( actualRef.equals(expectRef) ) {

                result = "succeeded";

                numOfSubtestsPassed += 1;

                // System.out.println("pattern:   " + actualLinkPattern1.pattern());

                // System.out.println("actualRef: " + actualRef);

                // System.out.println("group0:    " + actualLinkMatcher1.group());

                // System.out.println("group1:    " + actualLinkMatcher1.group(1));

                // System.out.println("group2:    " + actualLinkMatcher1.group(2));

                // System.out.println("group3:    " + actualLinkMatcher1.group(3));

                // System.exit(0);

            } else {

                result = "FAILED";

            }

            System.out.println("\nSub-test " + (subtestNum)

                + " for bug " + BUGID + " (" + BUGNAME + ") " + result + "\n"

                + "Actual: \"" + actualRef + "\"" + "\n"

                + "Expect: \"" + expectRef + "\"");

        } else {

            System.out.println("Didn't find <A HREF> that fits the pattern: "

                  + expectLinkPattern1.pattern() );

        }

    }

}