/*

 * Copyright (c) 2013, 2018, 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

 * @summary set default max errs and max warns

 * @modules jdk.javadoc/jdk.javadoc.internal.tool

 */

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

import java.io.PrintWriter;

import java.io.StringWriter;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

public class MaxWarns {

    public static void main(String... args) throws Exception {

        new MaxWarns().run();

    }

    void run() throws Exception {

        final int defaultMaxWarns = 100;

        final int genWarns = 150;

        File f = genSrc(genWarns);

        String out = javadoc(f);

        check(out, defaultMaxWarns);

        if (errors > 0)

            throw new Exception(errors + " errors occurred");

    }

    File genSrc(int count) throws IOException {

        StringBuilder sb = new StringBuilder();

        sb.append("package p;\n")

            .append("public class C {\n")

            .append("    /**\n");

        for (int i = 0; i < count; i++)

            sb.append("     * @param i").append(i).append(" does not exist!\n");

        sb.append("     */\n")

            .append("    public void m() { }\n")

            .append("}\n");

        File srcDir = new File("src");

        srcDir.mkdirs();

        File f = new File(srcDir, "C.java");

        try (FileWriter fw = new FileWriter(f)) {

            fw.write(sb.toString());

        }

        return f;

    }

    String javadoc(File f) {

        StringWriter sw = new StringWriter();

        PrintWriter pw = new PrintWriter(sw);

        int rc = jdk.javadoc.internal.tool.Main.execute(args, pw);

        pw.flush();

        return sw.toString();

    }

    void check(String out, int count) {

        System.err.println(out);

        Pattern warn = Pattern.compile("warning - @param argument \"i[0-9]+\" is not a parameter name");

        Matcher m = warn.matcher(out);

        int n = 0;

        for (int start = 0; m.find(start); start = m.start() + 1) {

            n++;

        }

        if (n != count)

            error("unexpected number of warnings reported: " + n + "; expected: " + count);

        Pattern warnCount = Pattern.compile("(?ms).*^([0-9]+) warnings$.*");

        m = warnCount.matcher(out);

        if (m.matches()) {

            n = Integer.parseInt(m.group(1));

            if (n != count)

                error("unexpected number of warnings reported: " + n + "; expected: " + count);

        } else

            error("total count not found");

    }

    void error(String msg) {

        System.err.println("Error: " + msg);

        errors++;

    }

    int errors;

}