/*

 * Copyright (c) 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.  Oracle designates this

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

 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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package jdk.jfr.jvm;

import jdk.jfr.internal.JVM;

import jdk.jfr.internal.Logger;

import jdk.jfr.internal.LogTag;

import jdk.jfr.internal.LogLevel;

/*

 * @test TestLogImplementation

 * @key jfr

 * @library /test/lib

 * @modules jdk.jfr/jdk.jfr.internal

 * @run main/othervm jdk.jfr.jvm.TestLogImplementation

 */

public class TestLogImplementation {

    private static LogLevel DEFAULT_TEST_LOG_LEVEL = LogLevel.ERROR;

    private static LogTag JFR_LOG_TAG = LogTag.JFR;

    private static void assertAllLevelsForTag(LogTag tag, String message) {

        for (LogLevel level : LogLevel.values()) {

            Logger.log(tag, level, message);

        }

    }

    private static void assertAllTagsForLevel(LogLevel level, String message) {

        for (LogTag tag : LogTag.values()) {

            Logger.log(tag, level, message);

        }

    }

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

        assertEmptyMessageOK();

        assertNullMessageOK();

        assertAllCharsOK();

        assertLargeMessageOK();

        assertFormatSpecifierOK();

        assertAllLevelOK();

        assertLogLevelUnderflow();

        assertLogLevelOverflow();

        assertLogTagUnderflow();

        assertLogTagOverflow();

    }

    private static void assertAllLevelOK() {

        assertAllLevelsForTag(JFR_LOG_TAG, "");

        assertAllTagsForLevel(DEFAULT_TEST_LOG_LEVEL, "");

    }

    private static void assertFormatSpecifierOK() {

        assertAllTagsForLevel(DEFAULT_TEST_LOG_LEVEL, "%s");

        assertAllTagsForLevel(DEFAULT_TEST_LOG_LEVEL, "%n");

        assertAllTagsForLevel(DEFAULT_TEST_LOG_LEVEL, "%h");

    }

    private static void assertLargeMessageOK() {

        StringBuilder large = new StringBuilder();

        for (int i = 0; i < 1000 * 1000; i++) {

            large.append('o');

        }

        Logger.log(JFR_LOG_TAG, DEFAULT_TEST_LOG_LEVEL, large.toString());

    }

    private static void assertAllCharsOK() {

        char c = Character.MIN_VALUE;

        StringBuilder large = new StringBuilder();

        int logSize = 0;

        for(int i = Character.MIN_VALUE; i< (int)Character.MAX_VALUE; i++, c++) {

            large.append(c);

            logSize++;

            if (logSize == 80) {

                Logger.log(JFR_LOG_TAG, DEFAULT_TEST_LOG_LEVEL, large.toString());

                large = new StringBuilder();

            }

        }

    }

    private static void assertEmptyMessageOK() {

        assertAllLevelsForTag(JFR_LOG_TAG, "");

    }

    private static void assertNullMessageOK() {

        assertAllLevelsForTag(JFR_LOG_TAG, (String)null);

    }

    private static void assertLogLevelUnderflow() {

        try {

            JVM.log(JFR_LOG_TAG.ordinal(), 0, (String)null);

        } catch (IllegalArgumentException ex) {

            // Expected

        }

    }

    private static void assertLogLevelOverflow() {

        try {

            JVM.log(JFR_LOG_TAG.ordinal(), LogLevel.ERROR.ordinal() + 1, (String)null);

        } catch (IllegalArgumentException ex) {

            // Expected

        }

    }

    private static void assertLogTagUnderflow() {

        try {

            JVM.log(JFR_LOG_TAG.ordinal() - 1, DEFAULT_TEST_LOG_LEVEL.ordinal(), (String)null);

        } catch (IllegalArgumentException ex) {

            // Expected

        }

    }

    // since the enum will grow with new entries, provoking an overflow is problematic

    // is there a built-in "current max" in a Java enum

    private static void assertLogTagOverflow() {

        try {

            JVM.log(10000, DEFAULT_TEST_LOG_LEVEL.ordinal(), (String)null);

        } catch (IllegalArgumentException ex) {

            // Expected

        }

    }

}