/*
 * Copyright (c) 2008-2017, Hazelcast, Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.hazelcast.internal.diagnostics;

import java.io.PrintWriter;

import static com.hazelcast.util.StringUtil.LINE_SEPARATOR;

/**
 * A {@link DiagnosticsLogWriter} that writes using a single line. Useful for automatic analysis e.g. using grep.
 */
class SingleLineDiagnosticsLogWriter extends DiagnosticsLogWriter {

    private boolean firstEntry = true;

    @Override
    public void startSection(String name) {
        if (sectionLevel == -1) {
            appendDateTime();
            write(' ');
        }

        appendComma();
        write(name).write('[');
        firstEntry = true;
        sectionLevel++;
    }

    @Override
    public void endSection() {
        write(']');
        sectionLevel--;

        if (sectionLevel == -1) {
            write(LINE_SEPARATOR);
        }
    }

    @Override
    public void writeEntry(String s) {
        appendComma();
        write(s);
    }

    private void appendComma() {
        if (firstEntry) {
            firstEntry = false;
        } else {
            write(',');
        }
    }

    @Override
    public void writeKeyValueEntry(String key, String value) {
        appendComma();
        write(key).write('=').write(value);
    }

    @Override
    public void writeKeyValueEntry(String key, double value) {
        appendComma();
        write(key).write('=').write(value);
    }

    @Override
    public void writeKeyValueEntry(String key, long value) {
        appendComma();
        write(key).write('=').write(value);
    }

    @Override
    public void writeKeyValueEntry(String key, boolean value) {
        appendComma();
        write(key).write('=').write(value);
    }

    @Override
    protected void init(PrintWriter writer) {
        firstEntry = true;
        super.init(writer);
    }
}