/*
 * Copyright 2017-present Open Networking Foundation
 *
 * 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 org.onosproject.store.primitives.impl;

import org.onlab.util.Tools;
import org.onosproject.store.service.AsyncAtomicCounterMap;

import java.util.concurrent.CompletableFuture;
import java.util.function.Function;

/**
 * An {@code AsyncAtomicCounterMap} that transcodes keys.
 */
public class TranscodingAsyncAtomicCounterMap<K1, K2> implements AsyncAtomicCounterMap<K1> {
    private final AsyncAtomicCounterMap<K2> backingMap;
    private final Function<K1, K2> keyEncoder;
    private final Function<K2, K1> keyDecoder;

    public TranscodingAsyncAtomicCounterMap(AsyncAtomicCounterMap<K2> backingMap,
            Function<K1, K2> keyEncoder, Function<K2, K1> keyDecoder) {
        this.backingMap = backingMap;
        this.keyEncoder = k -> k == null ? null : keyEncoder.apply(k);
        this.keyDecoder = k -> k == null ? null : keyDecoder.apply(k);
    }

    @Override
    public String name() {
        return backingMap.name();
    }

    @Override
    public CompletableFuture<Long> incrementAndGet(K1 key) {
        try {
            return backingMap.incrementAndGet(keyEncoder.apply(key));
        } catch (Exception e) {
            return Tools.exceptionalFuture(e);
        }
    }

    @Override
    public CompletableFuture<Long> decrementAndGet(K1 key) {
        try {
            return backingMap.decrementAndGet(keyEncoder.apply(key));
        } catch (Exception e) {
            return Tools.exceptionalFuture(e);
        }
    }

    @Override
    public CompletableFuture<Long> getAndIncrement(K1 key) {
        try {
            return backingMap.getAndIncrement(keyEncoder.apply(key));
        } catch (Exception e) {
            return Tools.exceptionalFuture(e);
        }
    }

    @Override
    public CompletableFuture<Long> getAndDecrement(K1 key) {
        try {
            return backingMap.getAndDecrement(keyEncoder.apply(key));
        } catch (Exception e) {
            return Tools.exceptionalFuture(e);
        }
    }

    @Override
    public CompletableFuture<Long> addAndGet(K1 key, long delta) {
        try {
            return backingMap.addAndGet(keyEncoder.apply(key), delta);
        } catch (Exception e) {
            return Tools.exceptionalFuture(e);
        }
    }

    @Override
    public CompletableFuture<Long> getAndAdd(K1 key, long delta) {
        try {
            return backingMap.getAndAdd(keyEncoder.apply(key), delta);
        } catch (Exception e) {
            return Tools.exceptionalFuture(e);
        }
    }

    @Override
    public CompletableFuture<Long> get(K1 key) {
        try {
            return backingMap.get(keyEncoder.apply(key));
        } catch (Exception e) {
            return Tools.exceptionalFuture(e);
        }
    }

    @Override
    public CompletableFuture<Long> put(K1 key, long newValue) {
        try {
            return backingMap.put(keyEncoder.apply(key), newValue);
        } catch (Exception e) {
            return Tools.exceptionalFuture(e);
        }
    }

    @Override
    public CompletableFuture<Long> putIfAbsent(K1 key, long newValue) {
        try {
            return backingMap.putIfAbsent(keyEncoder.apply(key), newValue);
        } catch (Exception e) {
            return Tools.exceptionalFuture(e);
        }
    }

    @Override
    public CompletableFuture<Boolean> replace(K1 key, long expectedOldValue, long newValue) {
        try {
            return backingMap.replace(keyEncoder.apply(key), expectedOldValue, newValue);
        } catch (Exception e) {
            return Tools.exceptionalFuture(e);
        }
    }

    @Override
    public CompletableFuture<Long> remove(K1 key) {
        try {
            return backingMap.remove(keyEncoder.apply(key));
        } catch (Exception e) {
            return Tools.exceptionalFuture(e);
        }
    }

    @Override
    public CompletableFuture<Boolean> remove(K1 key, long value) {
        try {
            return backingMap.remove(keyEncoder.apply(key), value);
        } catch (Exception e) {
            return Tools.exceptionalFuture(e);
        }
    }

    @Override
    public CompletableFuture<Integer> size() {
        try {
            return backingMap.size();
        } catch (Exception e) {
            return Tools.exceptionalFuture(e);
        }
    }

    @Override
    public CompletableFuture<Boolean> isEmpty() {
        try {
            return backingMap.isEmpty();
        } catch (Exception e) {
            return Tools.exceptionalFuture(e);
        }
    }

    @Override
    public CompletableFuture<Void> clear() {
        try {
            return backingMap.clear();
        } catch (Exception e) {
            return Tools.exceptionalFuture(e);
        }
    }
}