/*******************************************************************************
 *  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.
 * *****************************************************************************
 *
 *  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.CloudWatchLogs;
using Amazon.CloudWatchLogs.Model;

namespace Amazon.PowerShell.Cmdlets.CWL
{
    /// <summary>
    /// Creates a log group with the specified name. You can create up to 20,000 log groups
    /// per account.
    /// 
    ///  
    /// <para>
    /// You must use the following guidelines when naming a log group:
    /// </para><ul><li><para>
    /// Log group names must be unique within a Region for an Amazon Web Services account.
    /// </para></li><li><para>
    /// Log group names can be between 1 and 512 characters long.
    /// </para></li><li><para>
    /// Log group names consist of the following characters: a-z, A-Z, 0-9, '_' (underscore),
    /// '-' (hyphen), '/' (forward slash), '.' (period), and '#' (number sign)
    /// </para></li></ul><para>
    /// When you create a log group, by default the log events in the log group do not expire.
    /// To set a retention policy so that events expire and are deleted after a specified
    /// time, use <a href="https://docs.aws.amazon.com/AmazonCloudWatchLogs/latest/APIReference/API_PutRetentionPolicy.html">PutRetentionPolicy</a>.
    /// </para><para>
    /// If you associate an KMS key with the log group, ingested data is encrypted using the
    /// KMS key. This association is stored as long as the data encrypted with the KMS key
    /// is still within CloudWatch Logs. This enables CloudWatch Logs to decrypt this data
    /// whenever it is requested.
    /// </para><para>
    /// If you attempt to associate a KMS key with the log group but the KMS key does not
    /// exist or the KMS key is disabled, you receive an <code>InvalidParameterException</code>
    /// error. 
    /// </para><important><para>
    /// CloudWatch Logs supports only symmetric KMS keys. Do not associate an asymmetric KMS
    /// key with your log group. For more information, see <a href="https://docs.aws.amazon.com/kms/latest/developerguide/symmetric-asymmetric.html">Using
    /// Symmetric and Asymmetric Keys</a>.
    /// </para></important>
    /// </summary>
    [Cmdlet("New", "CWLLogGroup", SupportsShouldProcess = true, ConfirmImpact = ConfirmImpact.Medium)]
    [OutputType("None")]
    [AWSCmdlet("Calls the Amazon CloudWatch Logs CreateLogGroup API operation.", Operation = new[] {"CreateLogGroup"}, SelectReturnType = typeof(Amazon.CloudWatchLogs.Model.CreateLogGroupResponse))]
    [AWSCmdletOutput("None or Amazon.CloudWatchLogs.Model.CreateLogGroupResponse",
        "This cmdlet does not generate any output." +
        "The service response (type Amazon.CloudWatchLogs.Model.CreateLogGroupResponse) can be referenced from properties attached to the cmdlet entry in the $AWSHistory stack."
    )]
    public partial class NewCWLLogGroupCmdlet : AmazonCloudWatchLogsClientCmdlet, IExecutor
    {
        
        #region Parameter KmsKeyId
        /// <summary>
        /// <para>
        /// <para>The Amazon Resource Name (ARN) of the KMS key to use when encrypting log data. For
        /// more information, see <a href="https://docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html#arn-syntax-kms">Amazon
        /// Resource Names</a>.</para>
        /// </para>
        /// </summary>
        [System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true)]
        public System.String KmsKeyId { get; set; }
        #endregion
        
        #region Parameter LogGroupName
        /// <summary>
        /// <para>
        /// <para>The name of the log group.</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 LogGroupName { get; set; }
        #endregion
        
        #region Parameter Tag
        /// <summary>
        /// <para>
        /// <para>The key-value pairs to use for the tags.</para><para>You can grant users access to certain log groups while preventing them from accessing
        /// other log groups. To do so, tag your groups and use IAM policies that refer to those
        /// tags. To assign tags when you create a log group, you must have either the <code>logs:TagResource</code>
        /// or <code>logs:TagLogGroup</code> permission. For more information about tagging, see
        /// <a href="https://docs.aws.amazon.com/general/latest/gr/aws_tagging.html">Tagging Amazon
        /// Web Services resources</a>. For more information about using tags to control access,
        /// see <a href="https://docs.aws.amazon.com/IAM/latest/UserGuide/access_tags.html">Controlling
        /// access to Amazon Web Services resources using tags</a>.</para>
        /// </para>
        /// </summary>
        [System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true)]
        [Alias("Tags")]
        public System.Collections.Hashtable Tag { 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.CloudWatchLogs.Model.CreateLogGroupResponse).
        /// 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 LogGroupName parameter.
        /// The -PassThru parameter is deprecated, use -Select '^LogGroupName' instead. This parameter will be removed in a future version.
        /// </summary>
        [System.Obsolete("The -PassThru parameter is deprecated, use -Select '^LogGroupName' 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.LogGroupName), MyInvocation.BoundParameters);
            if (!ConfirmShouldProceed(this.Force.IsPresent, resourceIdentifiersText, "New-CWLLogGroup (CreateLogGroup)"))
            {
                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.CloudWatchLogs.Model.CreateLogGroupResponse, NewCWLLogGroupCmdlet>(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.LogGroupName;
            }
            #pragma warning restore CS0618, CS0612 //A class member was marked with the Obsolete attribute
            context.KmsKeyId = this.KmsKeyId;
            context.LogGroupName = this.LogGroupName;
            #if MODULAR
            if (this.LogGroupName == null && ParameterWasBound(nameof(this.LogGroupName)))
            {
                WriteWarning("You are passing $null as a value for parameter LogGroupName 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
            if (this.Tag != null)
            {
                context.Tag = new Dictionary<System.String, System.String>(StringComparer.Ordinal);
                foreach (var hashKey in this.Tag.Keys)
                {
                    context.Tag.Add((String)hashKey, (String)(this.Tag[hashKey]));
                }
            }
            
            // 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.CloudWatchLogs.Model.CreateLogGroupRequest();
            
            if (cmdletContext.KmsKeyId != null)
            {
                request.KmsKeyId = cmdletContext.KmsKeyId;
            }
            if (cmdletContext.LogGroupName != null)
            {
                request.LogGroupName = cmdletContext.LogGroupName;
            }
            if (cmdletContext.Tag != null)
            {
                request.Tags = cmdletContext.Tag;
            }
            
            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.CloudWatchLogs.Model.CreateLogGroupResponse CallAWSServiceOperation(IAmazonCloudWatchLogs client, Amazon.CloudWatchLogs.Model.CreateLogGroupRequest request)
        {
            Utils.Common.WriteVerboseEndpointMessage(this, client.Config, "Amazon CloudWatch Logs", "CreateLogGroup");
            try
            {
                #if DESKTOP
                return client.CreateLogGroup(request);
                #elif CORECLR
                return client.CreateLogGroupAsync(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 KmsKeyId { get; set; }
            public System.String LogGroupName { get; set; }
            public Dictionary<System.String, System.String> Tag { get; set; }
            public System.Func<Amazon.CloudWatchLogs.Model.CreateLogGroupResponse, NewCWLLogGroupCmdlet, object> Select { get; set; } =
                (response, cmdlet) => null;
        }
        
    }
}