/**
    * Copyright 2004-2014 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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.kuali.common.aws.ec2.model;
  
  import static com.google.common.base.Optional.absent;
  import static com.google.common.base.Optional.fromNullable;
  import static com.google.common.base.Preconditions.checkArgument;
  import static org.apache.commons.lang3.StringUtils.trimToNull;
  import static org.kuali.common.util.base.Precondition.checkMax;
  import static org.kuali.common.util.base.Precondition.checkMin;
  import static org.kuali.common.util.base.Precondition.checkNotBlank;
  
  import com.amazonaws.services.ec2.model.EbsBlockDevice;
  import com.amazonaws.services.ec2.model.VolumeType;
  import com.google.common.base.Optional;
  
  public final class ImmutableEbsBlockDevice extends EbsBlockDevice {
  
  	private static final long serialVersionUID = 1L;
  	private static final String UOE_MSG = "Not supported for immutable ebs block devices";
  
  	private ImmutableEbsBlockDevice(Builder builder) {
  		super.setSnapshotId(builder.snapshotId);
  		super.setVolumeType(builder.volumeType);
  		super.setDeleteOnTermination(builder.deleteOnTermination);
  		super.setIops(builder.iops.orNull());
  		super.setVolumeSize(builder.volumeSizeInGigabytes.orNull());
  	}
  
  	public static ImmutableEbsBlockDevice copyOf(EbsBlockDevice ebs) {
  		if (ebs instanceof ImmutableEbsBlockDevice) {
  			return (ImmutableEbsBlockDevice) ebs;
  		}
  		Builder builder = builder(ebs.getSnapshotId());
  		if (trimToNull(ebs.getVolumeType()) != null) {
  			builder.withVolumeType(VolumeType.fromValue(ebs.getVolumeType()));
  		}
  		if (ebs.getDeleteOnTermination() != null) {
  			builder.withDeleteOnTermination(ebs.getDeleteOnTermination());
  		}
  		if (ebs.getIops() != null) {
  			builder.withIops(ebs.getIops());
  		}
  		if (ebs.getVolumeSize() != null) {
  			builder.withVolumeSizeInGigabytes(ebs.getVolumeSize());
  		}
  		return builder.build();
  	}
  
  	public static Builder builder(String snapshotId) {
  		return new Builder(snapshotId);
  	}
  
  	public static class Builder implements org.apache.commons.lang3.builder.Builder<ImmutableEbsBlockDevice> {
  
  		private static final int IOPS_MIN = 100;
  		private static final int IOPS_MIN_VOLUME_SIZE = 10;
  		private static final int IOPS_MAX = 4000;
  
  		private final String snapshotId;
  		private VolumeType volumeType = VolumeType.Standard;
  		private boolean deleteOnTermination = true;
  		private Optional<Integer> iops = absent();
  		private Optional<Integer> volumeSizeInGigabytes = absent();
  
  		public Builder(String snapshotId) {
  			this.snapshotId = snapshotId;
  		}
  
  		public Builder withDeleteOnTermination(boolean deleteOnTermination) {
  			this.deleteOnTermination = deleteOnTermination;
  			return this;
  		}
  
  		public Builder withVolumeType(VolumeType volumeType) {
  			this.volumeType = volumeType;
  			return this;
  		}
  
  		public Builder withIops(Optional<Integer> iops) {
  			this.iops = iops;
  			return this;
  		}
  
  		public Builder withIops(int iops) {
  			return withIops(Optional.of(iops));
 		}
 
 		public Builder withVolumeSizeInGigabytes(Optional<Integer> volumeSizeInGigabytes) {
 			this.volumeSizeInGigabytes = volumeSizeInGigabytes;
 			return this;
 		}
 
 		public Builder withVolumeSizeInGigabytes(int volumeSizeInGigabytes) {
 			return withVolumeSizeInGigabytes(volumeSizeInGigabytes);
 		}
 
 		@Override
 		public ImmutableEbsBlockDevice build() {
 			return validate(new ImmutableEbsBlockDevice(this));
 		}
 
 		private static ImmutableEbsBlockDevice validate(ImmutableEbsBlockDevice instance) {
 			checkNotBlank(instance.getSnapshotId(), "snapshotId");
 			checkNotBlank(instance.getVolumeType(), "volumeType");
 			VolumeType vt = VolumeType.fromValue(instance.getVolumeType());
 			if (vt.equals(VolumeType.Io1)) {
 				Optional<Integer> iops = fromNullable(instance.getIops());
 				Optional<Integer> volumeSize = fromNullable(instance.getVolumeSize());
 				checkArgument(iops.isPresent(), "iops is required for volume type %s", vt.toString());
 				checkArgument(volumeSize.isPresent(), "volume size is required for volume type %s", vt.toString());
 				checkMin(iops, IOPS_MIN, "iops");
 				checkMax(iops.get(), IOPS_MAX, "iops");
 				checkMin(volumeSize, IOPS_MIN_VOLUME_SIZE, "volumeSize");
 			}
 			return instance;
 		}
 
 	}
 
 	@Override
 	public void setSnapshotId(String snapshotId) {
 		throw new UnsupportedOperationException(UOE_MSG);
 	}
 
 	@Override
 	public EbsBlockDevice withSnapshotId(String snapshotId) {
 		throw new UnsupportedOperationException(UOE_MSG);
 	}
 
 	@Override
 	public void setVolumeSize(Integer volumeSize) {
 		throw new UnsupportedOperationException(UOE_MSG);
 	}
 
 	@Override
 	public EbsBlockDevice withVolumeSize(Integer volumeSize) {
 		throw new UnsupportedOperationException(UOE_MSG);
 	}
 
 	@Override
 	public void setDeleteOnTermination(Boolean deleteOnTermination) {
 		throw new UnsupportedOperationException(UOE_MSG);
 	}
 
 	@Override
 	public void setEncrypted(Boolean encrypted) {
 		throw new UnsupportedOperationException(UOE_MSG);
 	}
 
 	@Override
 	public EbsBlockDevice withEncrypted(Boolean encrypted) {
 		throw new UnsupportedOperationException(UOE_MSG);
 	}
 
 	@Override
 	public EbsBlockDevice withDeleteOnTermination(Boolean deleteOnTermination) {
 		throw new UnsupportedOperationException(UOE_MSG);
 	}
 
 	@Override
 	public void setVolumeType(String volumeType) {
 		throw new UnsupportedOperationException(UOE_MSG);
 	}
 
 	@Override
 	public EbsBlockDevice withVolumeType(String volumeType) {
 		throw new UnsupportedOperationException(UOE_MSG);
 	}
 
 	@Override
 	public void setVolumeType(VolumeType volumeType) {
 		throw new UnsupportedOperationException(UOE_MSG);
 	}
 
 	@Override
 	public EbsBlockDevice withVolumeType(VolumeType volumeType) {
 		throw new UnsupportedOperationException(UOE_MSG);
 	}
 
 	@Override
 	public void setIops(Integer iops) {
 		throw new UnsupportedOperationException(UOE_MSG);
 	}
 
 	@Override
 	public EbsBlockDevice withIops(Integer iops) {
 		throw new UnsupportedOperationException(UOE_MSG);
 	}
 }