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/*
 * Copyright (c) 2008-2016, 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.client.cache.impl;

import com.hazelcast.cache.impl.CacheProxyUtil;
import com.hazelcast.client.impl.HazelcastClientInstanceImpl;
import com.hazelcast.client.impl.protocol.ClientMessage;
import com.hazelcast.client.impl.protocol.codec.CacheCreateConfigCodec;
import com.hazelcast.client.impl.protocol.codec.CacheGetConfigCodec;
import com.hazelcast.client.impl.protocol.codec.CacheManagementConfigCodec;
import com.hazelcast.client.spi.impl.ClientInvocation;
import com.hazelcast.config.CacheConfig;
import com.hazelcast.core.Member;
import com.hazelcast.nio.Address;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.spi.serialization.SerializationService;
import com.hazelcast.util.FutureUtil;

import java.util.ArrayList;
import java.util.Collection;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;

import static com.hazelcast.util.ExceptionUtil.rethrow;
import static com.hazelcast.util.ExceptionUtil.sneakyThrow;

/**
 * Helper class for some client cache related stuff.
 */
final class ClientCacheHelper {

    private ClientCacheHelper() {
    }

    /**
     * Gets the cache configuration from the server.
     *
     * @param client          the client instance which will send the operation to server
     * @param cacheName       full cache name with prefixes
     * @param simpleCacheName pure cache name without any prefix
     * @param              type of the key of the cache
     * @param              type of the value of the cache
     * @return the cache configuration if it can be found
     */
    static  CacheConfig getCacheConfig(HazelcastClientInstanceImpl client,
                                                   String cacheName, String simpleCacheName) {
        ClientMessage request = CacheGetConfigCodec.encodeRequest(cacheName, simpleCacheName);
        try {
            int partitionId = client.getClientPartitionService().getPartitionId(cacheName);
            ClientInvocation clientInvocation = new ClientInvocation(client, request, partitionId);
            Future future = clientInvocation.invoke();
            ClientMessage responseMessage = future.get();
            SerializationService serializationService = client.getSerializationService();
            return serializationService.toObject(CacheGetConfigCodec.decodeResponse(responseMessage).response);
        } catch (Exception e) {
            throw rethrow(e);
        }
    }

    /**
     * Sends the cache configuration to server.
     *
     * @param client             the client instance which will send the operation to server
     * @param configs            {@link ConcurrentMap} based store that holds cache configurations
     * @param cacheName          full cache name with prefixes
     * @param newCacheConfig     the cache configuration to be sent to server
     * @param createAlsoOnOthers flag which represents whether cache config
     *                           will be sent to other nodes by the target node
     * @param syncCreate         flag which represents response will be waited from the server
     * @param                 type of the key of the cache
     * @param                 type of the value of the cache
     * @return the created cache configuration
     */
    static  CacheConfig createCacheConfig(HazelcastClientInstanceImpl client,
                                                      ConcurrentMap configs,
                                                      String cacheName,
                                                      CacheConfig newCacheConfig,
                                                      boolean createAlsoOnOthers,
                                                      boolean syncCreate) {
        try {
            CacheConfig currentCacheConfig = configs.get(cacheName);
            int partitionId = client.getClientPartitionService().getPartitionId(newCacheConfig.getNameWithPrefix());
            Data newCacheConfigData = client.getSerializationService().toData(newCacheConfig);
            ClientMessage request = CacheCreateConfigCodec.encodeRequest(newCacheConfigData, createAlsoOnOthers);
            ClientInvocation clientInvocation = new ClientInvocation(client, request, partitionId);
            Future future = clientInvocation.invoke();
            if (syncCreate) {
                final ClientMessage response = future.get();
                final Data data = CacheCreateConfigCodec.decodeResponse(response).response;
                return (CacheConfig) client.getSerializationService().toObject(data);
            } else {
                return currentCacheConfig;
            }
        } catch (Exception e) {
            throw rethrow(e);
        }
    }

    /**
     * Enables/disables statistics or management support of cache on the all servers in the cluster.
     *
     * @param client    the client instance which will send the operation to server
     * @param cacheName full cache name with prefixes
     * @param statOrMan flag that represents which one of the statistics or management will be enabled
     * @param enabled   flag which represents whether it is enable or disable
     */
    static void enableStatisticManagementOnNodes(HazelcastClientInstanceImpl client,
                                                 String cacheName,
                                                 boolean statOrMan, boolean enabled) {
        Collection members = client.getClientClusterService().getMemberList();
        Collection futures = new ArrayList();
        for (Member member : members) {
            try {
                Address address = member.getAddress();
                ClientMessage request = CacheManagementConfigCodec.encodeRequest(cacheName, statOrMan, enabled, address);
                ClientInvocation clientInvocation = new ClientInvocation(client, request, address);
                Future future = clientInvocation.invoke();
                futures.add(future);
            } catch (Exception e) {
                sneakyThrow(e);
            }
        }
        // make sure all configs are created
        FutureUtil.waitWithDeadline(futures, CacheProxyUtil.AWAIT_COMPLETION_TIMEOUT_SECONDS, TimeUnit.SECONDS);
    }
}