#region Copyright
/*
* Copyright © 2014-2016 NetApp, Inc. All Rights Reserved.
*
* CONFIDENTIALITY NOTICE: THIS SOFTWARE CONTAINS CONFIDENTIAL INFORMATION OF
* NETAPP, INC. USE, DISCLOSURE OR REPRODUCTION IS PROHIBITED WITHOUT THE PRIOR
* EXPRESS WRITTEN PERMISSION OF NETAPP, INC.
*/
#endregion

#region Using Directives

using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Management.Automation;
using SolidFire.Core.Validation;
using System.Management.Automation.Runspaces;
using SolidFire.Core;
using SolidFire.Element.Api;

#endregion

namespace SolidFire.Volume.New
{
    /// <summary>
    /// NewSFGroupSnapshot is used to create a point-in-time copy of a group of volumes. The snapshot created can then be used later as a
    /// backup or rollback to ensure the data on the group of volumes is consistent for the point in time in which the snapshot was
    /// created.
    /// </summary>
    
    [Cmdlet(VerbsCommon.New, "SFGroupSnapshot", ConfirmImpact = ConfirmImpact.Medium, DefaultParameterSetName = "VolumeId")]
    public class NewSFGroupSnapshot : SFCmdlet
    {
        #region Private Data

        private bool? _enableRemoteReplication;
        private string _retention;

        /// <summary>
        /// Member to hold the volume ids from the calls to ProcessRecord and 
        /// used to submit to the API call.
        /// </summary>
        private List<Int64> _volumeIdsToGroupSnapshot = new List<Int64>();

        private Pipeline pipeline;

        #endregion

        #region Parameters
        /// <summary>
        /// Unique IDs of the volumes to include in the group snapshot.
        /// </summary>
        [Parameter(Position = 0, ParameterSetName = "VolumeId", Mandatory = true, ValueFromPipeline = true, ValueFromPipelineByPropertyName = true, HelpMessage = "Unique ID of the volume image from which to copy")]
        [ValidatePattern(SolidFireValidations.Numeric)]
        public Int64[] VolumeID { get; set; }

        /// <summary>
        /// Name entered for the group snapshot. If no name is entered, the date and time the group snapshot was taken is used.
        /// </summary>
        [Parameter(Position = 1, Mandatory = false, ValueFromPipeline = false, ValueFromPipelineByPropertyName = false, HelpMessage = "Name for the snapshot group")]
        [ValidatePattern(SolidFireValidations.UpperAndLowerCaseAndNumeric)]
        public string Name { get; set; }

        [Parameter(Position = 2, Mandatory = false, ValueFromPipeline = false, ValueFromPipelineByPropertyName = false, HelpMessage = "Should the snapsnot be replicated to remote storage?")]
        public SwitchParameter EnableRemoteReplication
        {
            get { return _enableRemoteReplication.HasValue ? _enableRemoteReplication.Value : false; }
            set { _enableRemoteReplication = value.IsPresent; }
        }

        [Parameter(Position = 3, Mandatory = false, ValueFromPipeline = false, ValueFromPipelineByPropertyName = false, HelpMessage = "The amount of time the snapshot should be retained. Enter in HHHHHHHH:mm:ss. Maximum retention time is 10000000:00:00")]
        [SFValidatePattern(SolidFireValidations.HoursMinutesSeconds, "The argument is not in the format of HHHHHHHH:mm:ss.")]
        public string Retention
        {
            get
            {
                return _retention;
            }
            set
            {
                SolidFireValidations.ValidateHoursMinutesSecondsForRetention(value);
                _retention = value;
            }
        }

        /// <summary>
        /// Attributes to save with the group snapshot.
        /// </summary>
        [Parameter(Position = 4, Mandatory = false, ValueFromPipeline = false, ValueFromPipelineByPropertyName = false, HelpMessage = "Attributes to set")]
        public Hashtable Attributes { get; set; }
        #endregion

        #region Cmdlet Overrides

        /// <summary>
        /// Implementation for validation the status of the connection before
        /// allowing the cmdlet to continue processing.
        /// </summary>
        protected override void BeginProcessing()
        {
            base.BeginProcessing();
            CheckConnection(minVersionNumber: 7.0f);
            pipeline = Runspace.DefaultRunspace.CreateNestedPipeline();
        }

        /// <summary>
        /// Implementation for collecting the volume IDs.
        /// Note: This method is called multiple times per execution of the 
        /// CmdLet for pipelined objects.
        /// </summary>
        protected override void ProcessRecord()
        {
            base.ProcessRecord();
            foreach (var id in this.VolumeID)
            {
                // Queue up the volume ID for a group snapshot to be taken in the EndProcessing method.
                WriteVerbose(string.Format("VolumeID {0} queued up for new group snapshot", id));
                _volumeIdsToGroupSnapshot.Add(id);
            }
        }

        /// <summary>
        /// Implementation for executing the input against the API.
        /// </summary>
        protected override void EndProcessing()
        {
            base.EndProcessing();
            // Assemble the required parameters for the API call.
            // volumes is the only required attribute.
            var request = new CreateGroupSnapshotRequest();
            request.Volumes = _volumeIdsToGroupSnapshot.ToArray();
            request.Name = Name;
            request.EnableRemoteReplication = _enableRemoteReplication.HasValue ? _enableRemoteReplication : null;
            request.Retention = _retention;
            request.Attributes = Attributes == null ? null : Attributes;

            // Call the CreateGroupSnapshot API method with parameters.
            var objsFromAPI = SendRequest<CreateGroupSnapshotResult>("CreateGroupSnapshot", request);

            foreach (var obj in objsFromAPI)
            {
                var command = new Command("Get-SFGroupSnapshot");
                command.Parameters.Add("GroupSnapshotID", obj.Result.GroupSnapshotID);
                if (SFConnection != null)
                {
                    command.Parameters.Add("SFConnection", SFConnection);
                }
                else if (Target != null)
                {
                    command.Parameters.Add("Target", Target);
                }
                pipeline.Commands.Add(command);
            }
            WriteObject(pipeline.Invoke(), true);
            pipeline = null;

        }

        #endregion
    }
}