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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.
 * *****************************************************************************
 *
 *  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.CloudTrail;
using Amazon.CloudTrail.Model;

namespace Amazon.PowerShell.Cmdlets.CT
{
    /// <summary>
    /// Looks up <a href="https://docs.aws.amazon.com/awscloudtrail/latest/userguide/cloudtrail-concepts.html#cloudtrail-concepts-management-events">management
    /// events</a> or <a href="https://docs.aws.amazon.com/awscloudtrail/latest/userguide/cloudtrail-concepts.html#cloudtrail-concepts-insights-events">CloudTrail
    /// Insights events</a> that are captured by CloudTrail. You can look up events that occurred
    /// in a Region within the last 90 days. Lookup supports the following attributes for
    /// management events:
    /// 
    ///  <ul><li><para>
    /// Amazon Web Services access key
    /// </para></li><li><para>
    /// Event ID
    /// </para></li><li><para>
    /// Event name
    /// </para></li><li><para>
    /// Event source
    /// </para></li><li><para>
    /// Read only
    /// </para></li><li><para>
    /// Resource name
    /// </para></li><li><para>
    /// Resource type
    /// </para></li><li><para>
    /// User name
    /// </para></li></ul><para>
    /// Lookup supports the following attributes for Insights events:
    /// </para><ul><li><para>
    /// Event ID
    /// </para></li><li><para>
    /// Event name
    /// </para></li><li><para>
    /// Event source
    /// </para></li></ul><para>
    /// All attributes are optional. The default number of results returned is 50, with a
    /// maximum of 50 possible. The response includes a token that you can use to get the
    /// next page of results.
    /// </para><important><para>
    /// The rate of lookup requests is limited to two per second, per account, per Region.
    /// If this limit is exceeded, a throttling error occurs.
    /// </para></important><br/><br/>This cmdlet automatically pages all available results to the pipeline - parameters related to iteration are only needed if you want to manually control the paginated output. To disable autopagination, use -NoAutoIteration.
    /// </summary>
    [Cmdlet("Find", "CTEvent")]
    [OutputType("Amazon.CloudTrail.Model.Event")]
    [AWSCmdlet("Calls the AWS CloudTrail LookupEvents API operation.", Operation = new[] {"LookupEvents"}, SelectReturnType = typeof(Amazon.CloudTrail.Model.LookupEventsResponse), LegacyAlias="Find-CTEvents")]
    [AWSCmdletOutput("Amazon.CloudTrail.Model.Event or Amazon.CloudTrail.Model.LookupEventsResponse",
        "This cmdlet returns a collection of Amazon.CloudTrail.Model.Event objects.",
        "The service call response (type Amazon.CloudTrail.Model.LookupEventsResponse) can also be referenced from properties attached to the cmdlet entry in the $AWSHistory stack."
    )]
    public partial class FindCTEventCmdlet : AmazonCloudTrailClientCmdlet, IExecutor
    {
        
        #region Parameter EndTime
        /// <summary>
        /// <para>
        /// <para>Specifies that only events that occur before or at the specified time are returned.
        /// If the specified end time is before the specified start time, an error is returned.</para>
        /// </para>
        /// </summary>
        [System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true)]
        public System.DateTime? EndTime { get; set; }
        #endregion
        
        #region Parameter EventCategory
        /// <summary>
        /// <para>
        /// <para>Specifies the event category. If you do not specify an event category, events of the
        /// category are not returned in the response. For example, if you do not specify <code>insight</code>
        /// as the value of <code>EventCategory</code>, no Insights events are returned.</para>
        /// </para>
        /// </summary>
        [System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true)]
        [AWSConstantClassSource("Amazon.CloudTrail.EventCategory")]
        public Amazon.CloudTrail.EventCategory EventCategory { get; set; }
        #endregion
        
        #region Parameter LookupAttribute
        /// <summary>
        /// <para>
        /// <para>Contains a list of lookup attributes. Currently the list can contain only one item.</para>
        /// </para>
        /// </summary>
        [System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true)]
        [Alias("LookupAttributes")]
        public Amazon.CloudTrail.Model.LookupAttribute[] LookupAttribute { get; set; }
        #endregion
        
        #region Parameter StartTime
        /// <summary>
        /// <para>
        /// <para>Specifies that only events that occur after or at the specified time are returned.
        /// If the specified start time is after the specified end time, an error is returned.</para>
        /// </para>
        /// </summary>
        [System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true)]
        public System.DateTime? StartTime { get; set; }
        #endregion
        
        #region Parameter MaxResult
        /// <summary>
        /// <para>
        /// <para>The number of events to return. Possible values are 1 through 50. The default is 50.</para>
        /// </para>
        /// </summary>
        [System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true)]
        [Alias("MaxResults")]
        public System.Int32? MaxResult { get; set; }
        #endregion
        
        #region Parameter NextToken
        /// <summary>
        /// <para>
        /// <para>The token to use to get the next page of results after a previous API call. This token
        /// must be passed in with the same parameters that were specified in the original call.
        /// For example, if the original call specified an AttributeKey of 'Username' with a value
        /// of 'root', the call with NextToken should include those same parameters.</para>
        /// </para>
        /// <para>
        /// <br/><b>Note:</b> This parameter is only used if you are manually controlling output pagination of the service API call.
        /// <br/>In order to manually control output pagination, use '-NextToken $null' for the first call and '-NextToken $AWSHistory.LastServiceResponse.NextToken' for subsequent calls.
        /// </para>
        /// </summary>
        [System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true)]
        public System.String NextToken { get; set; }
        #endregion
        
        #region Parameter Select
        /// <summary>
        /// Use the -Select parameter to control the cmdlet output. The default value is 'Events'.
        /// Specifying -Select '*' will result in the cmdlet returning the whole service response (Amazon.CloudTrail.Model.LookupEventsResponse).
        /// Specifying the name of a property of type Amazon.CloudTrail.Model.LookupEventsResponse 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; } = "Events";
        #endregion
        
        #region Parameter NoAutoIteration
        /// <summary>
        /// By default the cmdlet will auto-iterate and retrieve all results to the pipeline by performing multiple
        /// service calls. If set, the cmdlet will retrieve only the next 'page' of results using the value of NextToken
        /// as the start point.
        /// </summary>
        [System.Management.Automation.Parameter(ValueFromPipelineByPropertyName = true)]
        public SwitchParameter NoAutoIteration { get; set; }
        #endregion
        
        protected override void ProcessRecord()
        {
            this._AWSSignerType = "v4";
            base.ProcessRecord();
            
            var context = new CmdletContext();
            
            // allow for manipulation of parameters prior to loading into context
            PreExecutionContextLoad(context);
            
            if (ParameterWasBound(nameof(this.Select)))
            {
                context.Select = CreateSelectDelegate<Amazon.CloudTrail.Model.LookupEventsResponse, FindCTEventCmdlet>(Select) ??
                    throw new System.ArgumentException("Invalid value for -Select parameter.", nameof(this.Select));
            }
            context.EndTime = this.EndTime;
            context.EventCategory = this.EventCategory;
            if (this.LookupAttribute != null)
            {
                context.LookupAttribute = new List<Amazon.CloudTrail.Model.LookupAttribute>(this.LookupAttribute);
            }
            context.MaxResult = this.MaxResult;
            context.NextToken = this.NextToken;
            context.StartTime = this.StartTime;
            
            // 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;
            var useParameterSelect = this.Select.StartsWith("^");
            
            // create request and set iteration invariants
            var request = new Amazon.CloudTrail.Model.LookupEventsRequest();
            
            if (cmdletContext.EndTime != null)
            {
                request.EndTime = cmdletContext.EndTime.Value;
            }
            if (cmdletContext.EventCategory != null)
            {
                request.EventCategory = cmdletContext.EventCategory;
            }
            if (cmdletContext.LookupAttribute != null)
            {
                request.LookupAttributes = cmdletContext.LookupAttribute;
            }
            if (cmdletContext.MaxResult != null)
            {
                request.MaxResults = cmdletContext.MaxResult.Value;
            }
            if (cmdletContext.StartTime != null)
            {
                request.StartTime = cmdletContext.StartTime.Value;
            }
            
            // Initialize loop variant and commence piping
            var _nextToken = cmdletContext.NextToken;
            var _userControllingPaging = this.NoAutoIteration.IsPresent || ParameterWasBound(nameof(this.NextToken));
            
            var client = Client ?? CreateClient(_CurrentCredentials, _RegionEndpoint);
            do
            {
                request.NextToken = _nextToken;
                
                CmdletOutput output;
                
                try
                {
                    
                    var response = CallAWSServiceOperation(client, request);
                    
                    object pipelineOutput = null;
                    if (!useParameterSelect)
                    {
                        pipelineOutput = cmdletContext.Select(response, this);
                    }
                    output = new CmdletOutput
                    {
                        PipelineOutput = pipelineOutput,
                        ServiceResponse = response
                    };
                    
                    _nextToken = response.NextToken;
                }
                catch (Exception e)
                {
                    output = new CmdletOutput { ErrorResponse = e };
                }
                
                ProcessOutput(output);
                
            } while (!_userControllingPaging && AutoIterationHelpers.HasValue(_nextToken));
            
            if (useParameterSelect)
            {
                WriteObject(cmdletContext.Select(null, this));
            }
            
            
            return null;
        }
        
        public ExecutorContext CreateContext()
        {
            return new CmdletContext();
        }
        
        #endregion
        
        #region AWS Service Operation Call
        
        private Amazon.CloudTrail.Model.LookupEventsResponse CallAWSServiceOperation(IAmazonCloudTrail client, Amazon.CloudTrail.Model.LookupEventsRequest request)
        {
            Utils.Common.WriteVerboseEndpointMessage(this, client.Config, "AWS CloudTrail", "LookupEvents");
            try
            {
                #if DESKTOP
                return client.LookupEvents(request);
                #elif CORECLR
                return client.LookupEventsAsync(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.DateTime? EndTime { get; set; }
            public Amazon.CloudTrail.EventCategory EventCategory { get; set; }
            public List<Amazon.CloudTrail.Model.LookupAttribute> LookupAttribute { get; set; }
            public System.Int32? MaxResult { get; set; }
            public System.String NextToken { get; set; }
            public System.DateTime? StartTime { get; set; }
            public System.Func<Amazon.CloudTrail.Model.LookupEventsResponse, FindCTEventCmdlet, object> Select { get; set; } =
                (response, cmdlet) => response.Events;
        }
        
    }
}