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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.KeyManagementService;
using Amazon.KeyManagementService.Model;

namespace Amazon.PowerShell.Cmdlets.KMS
{
    /// <summary>
    /// Creates a friendly name for a KMS key. 
    /// 
    ///  <note><para>
    /// Adding, deleting, or updating an alias can allow or deny permission to the KMS key.
    /// For details, see <a href="https://docs.aws.amazon.com/kms/latest/developerguide/abac.html">ABAC
    /// for KMS</a> in the <i>Key Management Service Developer Guide</i>.
    /// </para></note><para>
    /// You can use an alias to identify a KMS key in the KMS console, in the <a>DescribeKey</a>
    /// operation and in <a href="https://docs.aws.amazon.com/kms/latest/developerguide/concepts.html#cryptographic-operations">cryptographic
    /// operations</a>, such as <a>Encrypt</a> and <a>GenerateDataKey</a>. You can also change
    /// the KMS key that's associated with the alias (<a>UpdateAlias</a>) or delete the alias
    /// (<a>DeleteAlias</a>) at any time. These operations don't affect the underlying KMS
    /// key. 
    /// </para><para>
    /// You can associate the alias with any customer managed key in the same Amazon Web Services
    /// Region. Each alias is associated with only one KMS key at a time, but a KMS key can
    /// have multiple aliases. A valid KMS key is required. You can't create an alias without
    /// a KMS key.
    /// </para><para>
    /// The alias must be unique in the account and Region, but you can have aliases with
    /// the same name in different Regions. For detailed information about aliases, see <a href="https://docs.aws.amazon.com/kms/latest/developerguide/kms-alias.html">Using
    /// aliases</a> in the <i>Key Management Service Developer Guide</i>.
    /// </para><para>
    /// This operation does not return a response. To get the alias that you created, use
    /// the <a>ListAliases</a> operation.
    /// </para><para>
    /// The KMS key that you use for this operation must be in a compatible key state. For
    /// details, see <a href="https://docs.aws.amazon.com/kms/latest/developerguide/key-state.html">Key
    /// states of KMS keys</a> in the <i>Key Management Service Developer Guide</i>.
    /// </para><para><b>Cross-account use</b>: No. You cannot perform this operation on an alias in a
    /// different Amazon Web Services account.
    /// </para><para><b>Required permissions</b></para><ul><li><para><a href="https://docs.aws.amazon.com/kms/latest/developerguide/kms-api-permissions-reference.html">kms:CreateAlias</a>
    /// on the alias (IAM policy).
    /// </para></li><li><para><a href="https://docs.aws.amazon.com/kms/latest/developerguide/kms-api-permissions-reference.html">kms:CreateAlias</a>
    /// on the KMS key (key policy).
    /// </para></li></ul><para>
    /// For details, see <a href="https://docs.aws.amazon.com/kms/latest/developerguide/kms-alias.html#alias-access">Controlling
    /// access to aliases</a> in the <i>Key Management Service Developer Guide</i>.
    /// </para><para><b>Related operations:</b></para><ul><li><para><a>DeleteAlias</a></para></li><li><para><a>ListAliases</a></para></li><li><para><a>UpdateAlias</a></para></li></ul>
    /// </summary>
    [Cmdlet("New", "KMSAlias", SupportsShouldProcess = true, ConfirmImpact = ConfirmImpact.Medium)]
    [OutputType("None")]
    [AWSCmdlet("Calls the AWS Key Management Service CreateAlias API operation.", Operation = new[] {"CreateAlias"}, SelectReturnType = typeof(Amazon.KeyManagementService.Model.CreateAliasResponse))]
    [AWSCmdletOutput("None or Amazon.KeyManagementService.Model.CreateAliasResponse",
        "This cmdlet does not generate any output." +
        "The service response (type Amazon.KeyManagementService.Model.CreateAliasResponse) can be referenced from properties attached to the cmdlet entry in the $AWSHistory stack."
    )]
    public partial class NewKMSAliasCmdlet : AmazonKeyManagementServiceClientCmdlet, IExecutor
    {
        
        #region Parameter AliasName
        /// <summary>
        /// <para>
        /// <para>Specifies the alias name. This value must begin with <code>alias/</code> followed
        /// by a name, such as <code>alias/ExampleAlias</code>. </para><important><para>Do not include confidential or sensitive information in this field. This field may
        /// be displayed in plaintext in CloudTrail logs and other output.</para></important><para>The <code>AliasName</code> value must be string of 1-256 characters. It can contain
        /// only alphanumeric characters, forward slashes (/), underscores (_), and dashes (-).
        /// The alias name cannot begin with <code>alias/aws/</code>. The <code>alias/aws/</code>
        /// prefix is reserved for <a href="https://docs.aws.amazon.com/kms/latest/developerguide/concepts.html#aws-managed-cmk">Amazon
        /// Web Services managed keys</a>.</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 AliasName { get; set; }
        #endregion
        
        #region Parameter TargetKeyId
        /// <summary>
        /// <para>
        /// <para>Associates the alias with the specified <a href="https://docs.aws.amazon.com/kms/latest/developerguide/concepts.html#customer-cmk">customer
        /// managed key</a>. The KMS key must be in the same Amazon Web Services Region. </para><para>A valid key ID is required. If you supply a null or empty string value, this operation
        /// returns an error.</para><para>For help finding the key ID and ARN, see <a href="https://docs.aws.amazon.com/kms/latest/developerguide/viewing-keys.html#find-cmk-id-arn">Finding
        /// the Key ID and ARN</a> in the <i><i>Key Management Service Developer Guide</i></i>.</para><para>Specify the key ID or key ARN of the KMS key.</para><para>For example:</para><ul><li><para>Key ID: <code>1234abcd-12ab-34cd-56ef-1234567890ab</code></para></li><li><para>Key ARN: <code>arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab</code></para></li></ul><para>To get the key ID and key ARN for a KMS key, use <a>ListKeys</a> or <a>DescribeKey</a>.</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 TargetKeyId { get; set; }
        #endregion
        
        #region Parameter Select
        /// <summary>
        /// Use the -Select parameter to control the cmdlet output. The cmdlet doesn't have a return value by default.
        /// Specifying -Select '*' will result in the cmdlet returning the whole service response (Amazon.KeyManagementService.Model.CreateAliasResponse).
        /// 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 TargetKeyId parameter.
        /// The -PassThru parameter is deprecated, use -Select '^TargetKeyId' instead. This parameter will be removed in a future version.
        /// </summary>
        [System.Obsolete("The -PassThru parameter is deprecated, use -Select '^TargetKeyId' 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.TargetKeyId), MyInvocation.BoundParameters);
            if (!ConfirmShouldProceed(this.Force.IsPresent, resourceIdentifiersText, "New-KMSAlias (CreateAlias)"))
            {
                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.KeyManagementService.Model.CreateAliasResponse, NewKMSAliasCmdlet>(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.TargetKeyId;
            }
            #pragma warning restore CS0618, CS0612 //A class member was marked with the Obsolete attribute
            context.AliasName = this.AliasName;
            #if MODULAR
            if (this.AliasName == null && ParameterWasBound(nameof(this.AliasName)))
            {
                WriteWarning("You are passing $null as a value for parameter AliasName 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.TargetKeyId = this.TargetKeyId;
            #if MODULAR
            if (this.TargetKeyId == null && ParameterWasBound(nameof(this.TargetKeyId)))
            {
                WriteWarning("You are passing $null as a value for parameter TargetKeyId 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.KeyManagementService.Model.CreateAliasRequest();
            
            if (cmdletContext.AliasName != null)
            {
                request.AliasName = cmdletContext.AliasName;
            }
            if (cmdletContext.TargetKeyId != null)
            {
                request.TargetKeyId = cmdletContext.TargetKeyId;
            }
            
            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.KeyManagementService.Model.CreateAliasResponse CallAWSServiceOperation(IAmazonKeyManagementService client, Amazon.KeyManagementService.Model.CreateAliasRequest request)
        {
            Utils.Common.WriteVerboseEndpointMessage(this, client.Config, "AWS Key Management Service", "CreateAlias");
            try
            {
                #if DESKTOP
                return client.CreateAlias(request);
                #elif CORECLR
                return client.CreateAliasAsync(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 AliasName { get; set; }
            public System.String TargetKeyId { get; set; }
            public System.Func<Amazon.KeyManagementService.Model.CreateAliasResponse, NewKMSAliasCmdlet, object> Select { get; set; } =
                (response, cmdlet) => null;
        }
        
    }
}