/*

 * Copyright (c) 2012, 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.

 */

package org.graalvm.compiler.debug;

import static org.graalvm.compiler.debug.DebugCloseable.VOID_CLOSEABLE;

class MemUseTrackerKeyImpl extends AccumulatedKey implements MemUseTrackerKey {

    MemUseTrackerKeyImpl(String format, Object arg1, Object arg2) {

        super(new FlatMemUseTracker(format, arg1, arg2), format, arg1, arg2);

    }

    @Override

    public DebugCloseable start(DebugContext debug) {

        if (debug.isMemUseTrackerEnabled(this)) {

            CloseableCounter result = new MemUseCloseableCounterImpl(this, debug);

            debug.currentMemUseTracker = result;

            return result;

        }

        return VOID_CLOSEABLE;

    }

    public static String valueToString(long value) {

        return String.format("%d bytes", value);

    }

    @Override

    public String toHumanReadableFormat(long value) {

        return valueToString(value);

    }

    static final class FlatMemUseTracker extends AbstractKey implements MetricKey {

        FlatMemUseTracker(String nameFormat, Object nameArg1, Object nameArg2) {

            super(nameFormat, nameArg1, nameArg2);

        }

        @Override

        protected String createName(String format, Object arg1, Object arg2) {

            return super.createName(format, arg1, arg2) + FLAT_KEY_SUFFIX;

        }

        @Override

        public MetricKey doc(String doc) {

            throw new IllegalArgumentException("Cannot set documentation for derived key " + getName());

        }

        @Override

        public String getDocName() {

            return null;

        }

        @Override

        public String toHumanReadableFormat(long value) {

            return valueToString(value);

        }

        @Override

        public Pair<String, String> toCSVFormat(long value) {

            return Pair.create(String.valueOf(value), "bytes");

        }

    }

    static final class MemUseCloseableCounterImpl extends CloseableCounter implements DebugCloseable {

        private final DebugContext debug;

        MemUseCloseableCounterImpl(AccumulatedKey counter, DebugContext debug) {

            super(debug, debug.currentMemUseTracker, counter);

            this.debug = debug;

        }

        @Override

        long getCounterValue() {

            return MemUseTrackerKey.getCurrentThreadAllocatedBytes();

        }

        @Override

        public void close() {

            super.close();

            debug.currentMemUseTracker = parent;

        }

    }

    @Override

    public Pair<String, String> toCSVFormat(long value) {

        return Pair.create(String.valueOf(value), "bytes");

    }

    @Override

    public MemUseTrackerKey doc(String doc) {

        setDoc(doc);

        return this;

    }

}