namespace DSInternals.PowerShell.Commands
{
    using System;
    using System.Management.Automation;
    using DSInternals.DataStore;
    using DSInternals.PowerShell.Properties;

    [Cmdlet(VerbsCommon.Set, "ADDBBootKey")]
    [OutputType("None")]
    public class SetADDBBootKeyCommand : ADDBCommandBase
    {
        [Parameter(Mandatory = true)]
        [ValidateNotNull]
        [ValidateCount(BootKeyRetriever.BootKeyLength, BootKeyRetriever.BootKeyLength)]
        [AcceptHexString]
        [Alias("OldKey", "Old", "OldSysKey")]
        public byte[] OldBootKey
        {
            get;
            set;
        }

        [Parameter(Mandatory = false)]
        [ValidateNotNull]
        [ValidateCount(BootKeyRetriever.BootKeyLength, BootKeyRetriever.BootKeyLength)]
        [AcceptHexString]
        [Alias("NewKey", "New", "NewSysKey")]
        public byte[] NewBootKey
        {
            get;
            set;
        }

        [Parameter]
        public SwitchParameter Force
        {
            get;
            set;
        }

        protected override void BeginProcessing()
        {
            if (!Force.IsPresent)
            {
                // Do not continue with operation until the user enforces it.
                var exception = new ArgumentException(Resources.WarningMessage);
                var error = new ErrorRecord(exception, "SetADDBBootKey_ForceRequired", ErrorCategory.InvalidArgument, null);
                this.ThrowTerminatingError(error);
            }

            base.BeginProcessing();
            using(var directoryAgent = new DirectoryAgent(this.DirectoryContext))
            {
                directoryAgent.ChangeBootKey(this.OldBootKey, this.NewBootKey);
            }
            // TODO: Verbosity
            // TODO: Exception handling
        }

        protected override bool ReadOnly
        {
            get
            {
                // We need to modify the PEK List attribute.
                return false;
            }
        }
    }
}