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 *     following disclaimer. 
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 *     following disclaimer in the documentation and/or other 
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 * 
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using System;
using System.Collections.Generic;
using System.Text;
using XenAdmin.Network;
using XenAPI;
using XenAdmin.Dialogs;
using System.Collections.ObjectModel;


namespace XenAdmin.Commands
{
    /// <summary>
    /// Launches the change host password dialog for the specified host.
    /// </summary>
    internal class ChangeHostPasswordCommand : Command
    {
        /// <summary>
        /// Initializes a new instance of this Command. The parameter-less constructor is required in the derived
        /// class if it is to be attached to a ToolStrip menu item or button. It should not be used in any other scenario.
        /// </summary>
        public ChangeHostPasswordCommand()
        {
        }

        public ChangeHostPasswordCommand(IMainWindow mainWindow, IEnumerable<SelectedItem> selection)
            : base(mainWindow, selection)
        {
        }

        public ChangeHostPasswordCommand(IMainWindow mainWindow, Host host)
            : base(mainWindow, host)
        {
        }

        public ChangeHostPasswordCommand(IMainWindow mainWindow, Pool pool)
            : base(mainWindow, pool)
        {
        }

        protected override void ExecuteCore(SelectedItemCollection selection)
        {
            Host host = selection[0].XenObject as Host;
            Pool pool = selection[0].XenObject as Pool;

            if (host != null)
                MainWindowCommandInterface.ShowPerConnectionWizard(selection[0].Connection, new ChangeServerPasswordDialog(host));
            if (pool != null)
                MainWindowCommandInterface.ShowPerConnectionWizard(selection[0].Connection, new ChangeServerPasswordDialog(pool));
        }

        protected override bool CanExecuteCore(SelectedItemCollection selection)
        {
            if (selection.Count == 1)
            {
                IXenConnection connection = selection[0].Connection;
                Host host = selection[0].XenObject as Host;
                Pool pool = selection[0].XenObject as Pool;
                Session session = connection != null ? connection.Session : null;

                if (host != null)
                    return host.IsLive() && session != null && session.IsLocalSuperuser;
                if (pool != null)
                    return  session != null && session.IsLocalSuperuser;                
            }
            return false;
        }

        public override string ToolTipText
        {
            get
            {
                ReadOnlyCollection<SelectedItem> selection = GetSelection();

                if (selection.Count == 1)
                {
                    IXenConnection connection = selection[0].Connection;

                    // Only allow password change if the user is logged in as local root
                    // (i.e. disallow password change if the user is logged in via AD)

                    Host host = selection[0].XenObject as Host;
                    Pool pool = selection[0].XenObject as Pool;

                    if (host != null && host.IsLive() && connection.Session != null && !connection.Session.IsLocalSuperuser)
                    {
                        return Messages.AD_CANNOT_CHANGE_PASSWORD;
                    }
                    
                    if (pool != null && connection.Session != null && !connection.Session.IsLocalSuperuser)
                    {
                        return Messages.AD_CANNOT_CHANGE_PASSWORD;
                    }                   
                }
                return string.Empty;
            }
        }
    }
}
