/*******************************************************************************
 * Copyright (c) 2013 GigaSpaces Technologies Ltd. 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 org.cloudifysource.rest.validators;

import java.util.logging.Logger;

import org.cloudifysource.domain.Service;
import org.cloudifysource.domain.cloud.Cloud;
import org.cloudifysource.dsl.internal.CloudifyMessageKeys;
import org.cloudifysource.rest.controllers.RestErrorException;
import org.cloudifysource.rest.util.IsolationUtils;
import org.springframework.stereotype.Component;

/**
 * 
 * @author yael
 * @since 2.7.0 
 */
@Component
public class ValidateInstanceMemory implements InstallServiceValidator {

	private static final Logger logger = Logger.getLogger(ValidateInstanceMemory.class.getName());

    @Override
    public void validate(final InstallServiceValidationContext validationContext) throws RestErrorException {
    	logger.info("Validating isntance memory");
    	final Service service = validationContext.getService();
        final Cloud cloud = validationContext.getCloud();
        if (service == null) {
            return;
        }
        if (IsolationUtils.isDedicated(service)) {
            return;
        }
        String serviceTemplate = null;
        if (service.getCompute() != null) {
            serviceTemplate = service.getCompute().getTemplate();
        }
        if (serviceTemplate == null) {
            serviceTemplate = cloud.getCloudCompute().getTemplates().entrySet().iterator().next().getKey();
        }
        final int machineTemplateMemory =
                cloud.getCloudCompute().getTemplates().get(serviceTemplate).getMachineMemoryMB();
        final int reservedMachineMemory = cloud.getProvider().getReservedMemoryCapacityPerMachineInMB();
        final long instanceMemoryMB = IsolationUtils.getInstanceMemoryMB(service);
        if (instanceMemoryMB > machineTemplateMemory - reservedMachineMemory) {
            throw new RestErrorException(CloudifyMessageKeys.INSUFFICIENT_MEMORY.getName(),
                    service.getName(), instanceMemoryMB, machineTemplateMemory, reservedMachineMemory);
        }
    }

}