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 *  Copyright 2012-2019 Amazon.com, Inc. or its affiliates. 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. A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 *  or in the "license" file accompanying this file.
 *  This file 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.
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 *
 *  AWS Tools for Windows (TM) PowerShell (TM)
 *
 */

using System;
using System.Collections.Generic;
using System.Linq;
using System.Management.Automation;
using System.Text;
using Amazon.PowerShell.Common;
using Amazon.Runtime;
using Amazon.ElasticFileSystem;
using Amazon.ElasticFileSystem.Model;

namespace Amazon.PowerShell.Cmdlets.EFS
{
    /// <summary>
    /// Creates a mount target for a file system. You can then mount the file system on EC2
    /// instances by using the mount target.
    /// 
    ///  
    /// <para>
    /// You can create one mount target in each Availability Zone in your VPC. All EC2 instances
    /// in a VPC within a given Availability Zone share a single mount target for a given
    /// file system. If you have multiple subnets in an Availability Zone, you create a mount
    /// target in one of the subnets. EC2 instances do not need to be in the same subnet as
    /// the mount target in order to access their file system.
    /// </para><para>
    /// You can create only one mount target for an EFS file system using One Zone storage
    /// classes. You must create that mount target in the same Availability Zone in which
    /// the file system is located. Use the <code>AvailabilityZoneName</code> and <code>AvailabiltyZoneId</code>
    /// properties in the <a>DescribeFileSystems</a> response object to get this information.
    /// Use the <code>subnetId</code> associated with the file system's Availability Zone
    /// when creating the mount target.
    /// </para><para>
    /// For more information, see <a href="https://docs.aws.amazon.com/efs/latest/ug/how-it-works.html">Amazon
    /// EFS: How it Works</a>. 
    /// </para><para>
    /// To create a mount target for a file system, the file system's lifecycle state must
    /// be <code>available</code>. For more information, see <a>DescribeFileSystems</a>.
    /// </para><para>
    /// In the request, provide the following:
    /// </para><ul><li><para>
    /// The file system ID for which you are creating the mount target.
    /// </para></li><li><para>
    /// A subnet ID, which determines the following:
    /// </para><ul><li><para>
    /// The VPC in which Amazon EFS creates the mount target
    /// </para></li><li><para>
    /// The Availability Zone in which Amazon EFS creates the mount target
    /// </para></li><li><para>
    /// The IP address range from which Amazon EFS selects the IP address of the mount target
    /// (if you don't specify an IP address in the request)
    /// </para></li></ul></li></ul><para>
    /// After creating the mount target, Amazon EFS returns a response that includes, a <code>MountTargetId</code>
    /// and an <code>IpAddress</code>. You use this IP address when mounting the file system
    /// in an EC2 instance. You can also use the mount target's DNS name when mounting the
    /// file system. The EC2 instance on which you mount the file system by using the mount
    /// target can resolve the mount target's DNS name to its IP address. For more information,
    /// see <a href="https://docs.aws.amazon.com/efs/latest/ug/how-it-works.html#how-it-works-implementation">How
    /// it Works: Implementation Overview</a>. 
    /// </para><para>
    /// Note that you can create mount targets for a file system in only one VPC, and there
    /// can be only one mount target per Availability Zone. That is, if the file system already
    /// has one or more mount targets created for it, the subnet specified in the request
    /// to add another mount target must meet the following requirements:
    /// </para><ul><li><para>
    /// Must belong to the same VPC as the subnets of the existing mount targets
    /// </para></li><li><para>
    /// Must not be in the same Availability Zone as any of the subnets of the existing mount
    /// targets
    /// </para></li></ul><para>
    /// If the request satisfies the requirements, Amazon EFS does the following:
    /// </para><ul><li><para>
    /// Creates a new mount target in the specified subnet.
    /// </para></li><li><para>
    /// Also creates a new network interface in the subnet as follows:
    /// </para><ul><li><para>
    /// If the request provides an <code>IpAddress</code>, Amazon EFS assigns that IP address
    /// to the network interface. Otherwise, Amazon EFS assigns a free address in the subnet
    /// (in the same way that the Amazon EC2 <code>CreateNetworkInterface</code> call does
    /// when a request does not specify a primary private IP address).
    /// </para></li><li><para>
    /// If the request provides <code>SecurityGroups</code>, this network interface is associated
    /// with those security groups. Otherwise, it belongs to the default security group for
    /// the subnet's VPC.
    /// </para></li><li><para>
    /// Assigns the description <code>Mount target <i>fsmt-id</i> for file system <i>fs-id</i></code> where <code><i>fsmt-id</i></code> is the mount target ID, and <code><i>fs-id</i></code> is the <code>FileSystemId</code>.
    /// </para></li><li><para>
    /// Sets the <code>requesterManaged</code> property of the network interface to <code>true</code>,
    /// and the <code>requesterId</code> value to <code>EFS</code>.
    /// </para></li></ul><para>
    /// Each Amazon EFS mount target has one corresponding requester-managed EC2 network interface.
    /// After the network interface is created, Amazon EFS sets the <code>NetworkInterfaceId</code>
    /// field in the mount target's description to the network interface ID, and the <code>IpAddress</code>
    /// field to its address. If network interface creation fails, the entire <code>CreateMountTarget</code>
    /// operation fails.
    /// </para></li></ul><note><para>
    /// The <code>CreateMountTarget</code> call returns only after creating the network interface,
    /// but while the mount target state is still <code>creating</code>, you can check the
    /// mount target creation status by calling the <a>DescribeMountTargets</a> operation,
    /// which among other things returns the mount target state.
    /// </para></note><para>
    /// We recommend that you create a mount target in each of the Availability Zones. There
    /// are cost considerations for using a file system in an Availability Zone through a
    /// mount target created in another Availability Zone. For more information, see <a href="http://aws.amazon.com/efs/">Amazon
    /// EFS</a>. In addition, by always using a mount target local to the instance's Availability
    /// Zone, you eliminate a partial failure scenario. If the Availability Zone in which
    /// your mount target is created goes down, then you can't access your file system through
    /// that mount target. 
    /// </para><para>
    /// This operation requires permissions for the following action on the file system:
    /// </para><ul><li><para><code>elasticfilesystem:CreateMountTarget</code></para></li></ul><para>
    /// This operation also requires permissions for the following Amazon EC2 actions:
    /// </para><ul><li><para><code>ec2:DescribeSubnets</code></para></li><li><para><code>ec2:DescribeNetworkInterfaces</code></para></li><li><para><code>ec2:CreateNetworkInterface</code></para></li></ul>
    /// </summary>
    [Cmdlet("New", "EFSMountTarget", SupportsShouldProcess = true, ConfirmImpact = ConfirmImpact.Medium)]
    [OutputType("Amazon.ElasticFileSystem.Model.CreateMountTargetResponse")]
    [AWSCmdlet("Calls the Amazon Elastic File System CreateMountTarget API operation.", Operation = new[] {"CreateMountTarget"}, SelectReturnType = typeof(Amazon.ElasticFileSystem.Model.CreateMountTargetResponse))]
    [AWSCmdletOutput("Amazon.ElasticFileSystem.Model.CreateMountTargetResponse",
        "This cmdlet returns an Amazon.ElasticFileSystem.Model.CreateMountTargetResponse object containing multiple properties. The object can also be referenced from properties attached to the cmdlet entry in the $AWSHistory stack."
    )]
    public partial class NewEFSMountTargetCmdlet : AmazonElasticFileSystemClientCmdlet, IExecutor
    {
        
        #region Parameter FileSystemId
        /// <summary>
        /// <para>
        /// <para>The ID of the file system for which to create the mount target.</para>
        /// </para>
        /// </summary>
        #if !MODULAR
        [System.Management.Automation.Parameter(Position = 0, ValueFromPipelineByPropertyName = true, ValueFromPipeline = true)]
        #else
        [System.Management.Automation.Parameter(Position = 0, ValueFromPipelineByPropertyName = true, ValueFromPipeline = true, Mandatory = true)]
        [System.Management.Automation.AllowEmptyString]
        [System.Management.Automation.AllowNull]
        #endif
        [Amazon.PowerShell.Common.AWSRequiredParameter]
        public System.String FileSystemId { get; set; }
        #endregion
        
        #region Parameter IpAddress
        /// <summary>
        /// <para>
        /// <para>Valid IPv4 address within the address range of the specified subnet.</para>
        /// </para>
        /// </summary>
        [System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true)]
        public System.String IpAddress { get; set; }
        #endregion
        
        #region Parameter SecurityGroup
        /// <summary>
        /// <para>
        /// <para>Up to five VPC security group IDs, of the form <code>sg-xxxxxxxx</code>. These must
        /// be for the same VPC as subnet specified.</para>
        /// </para>
        /// </summary>
        [System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true)]
        [Alias("SecurityGroups")]
        public System.String[] SecurityGroup { get; set; }
        #endregion
        
        #region Parameter SubnetId
        /// <summary>
        /// <para>
        /// <para>The ID of the subnet to add the mount target in. For file systems that use One Zone
        /// storage classes, use the subnet that is associated with the file system's Availability
        /// Zone.</para>
        /// </para>
        /// </summary>
        #if !MODULAR
        [System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true)]
        #else
        [System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true, Mandatory = true)]
        [System.Management.Automation.AllowEmptyString]
        [System.Management.Automation.AllowNull]
        #endif
        [Amazon.PowerShell.Common.AWSRequiredParameter]
        public System.String SubnetId { get; set; }
        #endregion
        
        #region Parameter Select
        /// <summary>
        /// Use the -Select parameter to control the cmdlet output. The default value is '*'.
        /// Specifying -Select '*' will result in the cmdlet returning the whole service response (Amazon.ElasticFileSystem.Model.CreateMountTargetResponse).
        /// Specifying the name of a property of type Amazon.ElasticFileSystem.Model.CreateMountTargetResponse will result in that property being returned.
        /// Specifying -Select '^ParameterName' will result in the cmdlet returning the selected cmdlet parameter value.
        /// </summary>
        [System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true)]
        public string Select { get; set; } = "*";
        #endregion
        
        #region Parameter PassThru
        /// <summary>
        /// Changes the cmdlet behavior to return the value passed to the FileSystemId parameter.
        /// The -PassThru parameter is deprecated, use -Select '^FileSystemId' instead. This parameter will be removed in a future version.
        /// </summary>
        [System.Obsolete("The -PassThru parameter is deprecated, use -Select '^FileSystemId' instead. This parameter will be removed in a future version.")]
        [System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true)]
        public SwitchParameter PassThru { get; set; }
        #endregion
        
        #region Parameter Force
        /// <summary>
        /// This parameter overrides confirmation prompts to force 
        /// the cmdlet to continue its operation. This parameter should always
        /// be used with caution.
        /// </summary>
        [System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true)]
        public SwitchParameter Force { get; set; }
        #endregion
        
        protected override void ProcessRecord()
        {
            this._AWSSignerType = "v4";
            base.ProcessRecord();
            
            var resourceIdentifiersText = FormatParameterValuesForConfirmationMsg(nameof(this.FileSystemId), MyInvocation.BoundParameters);
            if (!ConfirmShouldProceed(this.Force.IsPresent, resourceIdentifiersText, "New-EFSMountTarget (CreateMountTarget)"))
            {
                return;
            }
            
            var context = new CmdletContext();
            
            // allow for manipulation of parameters prior to loading into context
            PreExecutionContextLoad(context);
            
            #pragma warning disable CS0618, CS0612 //A class member was marked with the Obsolete attribute
            if (ParameterWasBound(nameof(this.Select)))
            {
                context.Select = CreateSelectDelegate<Amazon.ElasticFileSystem.Model.CreateMountTargetResponse, NewEFSMountTargetCmdlet>(Select) ??
                    throw new System.ArgumentException("Invalid value for -Select parameter.", nameof(this.Select));
                if (this.PassThru.IsPresent)
                {
                    throw new System.ArgumentException("-PassThru cannot be used when -Select is specified.", nameof(this.Select));
                }
            }
            else if (this.PassThru.IsPresent)
            {
                context.Select = (response, cmdlet) => this.FileSystemId;
            }
            #pragma warning restore CS0618, CS0612 //A class member was marked with the Obsolete attribute
            context.FileSystemId = this.FileSystemId;
            #if MODULAR
            if (this.FileSystemId == null && ParameterWasBound(nameof(this.FileSystemId)))
            {
                WriteWarning("You are passing $null as a value for parameter FileSystemId which is marked as required. In case you believe this parameter was incorrectly marked as required, report this by opening an issue at https://github.com/aws/aws-tools-for-powershell/issues.");
            }
            #endif
            context.IpAddress = this.IpAddress;
            if (this.SecurityGroup != null)
            {
                context.SecurityGroup = new List<System.String>(this.SecurityGroup);
            }
            context.SubnetId = this.SubnetId;
            #if MODULAR
            if (this.SubnetId == null && ParameterWasBound(nameof(this.SubnetId)))
            {
                WriteWarning("You are passing $null as a value for parameter SubnetId which is marked as required. In case you believe this parameter was incorrectly marked as required, report this by opening an issue at https://github.com/aws/aws-tools-for-powershell/issues.");
            }
            #endif
            
            // allow further manipulation of loaded context prior to processing
            PostExecutionContextLoad(context);
            
            var output = Execute(context) as CmdletOutput;
            ProcessOutput(output);
        }
        
        #region IExecutor Members
        
        public object Execute(ExecutorContext context)
        {
            var cmdletContext = context as CmdletContext;
            // create request
            var request = new Amazon.ElasticFileSystem.Model.CreateMountTargetRequest();
            
            if (cmdletContext.FileSystemId != null)
            {
                request.FileSystemId = cmdletContext.FileSystemId;
            }
            if (cmdletContext.IpAddress != null)
            {
                request.IpAddress = cmdletContext.IpAddress;
            }
            if (cmdletContext.SecurityGroup != null)
            {
                request.SecurityGroups = cmdletContext.SecurityGroup;
            }
            if (cmdletContext.SubnetId != null)
            {
                request.SubnetId = cmdletContext.SubnetId;
            }
            
            CmdletOutput output;
            
            // issue call
            var client = Client ?? CreateClient(_CurrentCredentials, _RegionEndpoint);
            try
            {
                var response = CallAWSServiceOperation(client, request);
                object pipelineOutput = null;
                pipelineOutput = cmdletContext.Select(response, this);
                output = new CmdletOutput
                {
                    PipelineOutput = pipelineOutput,
                    ServiceResponse = response
                };
            }
            catch (Exception e)
            {
                output = new CmdletOutput { ErrorResponse = e };
            }
            
            return output;
        }
        
        public ExecutorContext CreateContext()
        {
            return new CmdletContext();
        }
        
        #endregion
        
        #region AWS Service Operation Call
        
        private Amazon.ElasticFileSystem.Model.CreateMountTargetResponse CallAWSServiceOperation(IAmazonElasticFileSystem client, Amazon.ElasticFileSystem.Model.CreateMountTargetRequest request)
        {
            Utils.Common.WriteVerboseEndpointMessage(this, client.Config, "Amazon Elastic File System", "CreateMountTarget");
            try
            {
                #if DESKTOP
                return client.CreateMountTarget(request);
                #elif CORECLR
                return client.CreateMountTargetAsync(request).GetAwaiter().GetResult();
                #else
                        #error "Unknown build edition"
                #endif
            }
            catch (AmazonServiceException exc)
            {
                var webException = exc.InnerException as System.Net.WebException;
                if (webException != null)
                {
                    throw new Exception(Utils.Common.FormatNameResolutionFailureMessage(client.Config, webException.Message), webException);
                }
                throw;
            }
        }
        
        #endregion
        
        internal partial class CmdletContext : ExecutorContext
        {
            public System.String FileSystemId { get; set; }
            public System.String IpAddress { get; set; }
            public List<System.String> SecurityGroup { get; set; }
            public System.String SubnetId { get; set; }
            public System.Func<Amazon.ElasticFileSystem.Model.CreateMountTargetResponse, NewEFSMountTargetCmdlet, object> Select { get; set; } =
                (response, cmdlet) => response;
        }
        
    }
}