/* Copyright (c) Cloud Software Group, Inc. 
 * 
 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
 * that the following conditions are met: 
 * 
 * *   Redistributions of source code must retain the above 
 *     copyright notice, this list of conditions and the 
 *     following disclaimer. 
 * *   Redistributions in binary form must reproduce the above 
 *     copyright notice, this list of conditions and the 
 *     following disclaimer in the documentation and/or other 
 *     materials provided with the distribution. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
 * SUCH DAMAGE.
 */

using System.Collections.Generic;
using XenAPI;
using XenAdmin.Network;


namespace XenAdmin.Commands
{
    internal class DisconnectHostCommand : Command
    {
        /// <summary>
        /// Initializes a new instance of this Command. The parameter-less constructor is required if 
        /// this Command is to be attached to a ToolStrip menu item or button. It should not be used in any other scenario.
        /// </summary>
        public DisconnectHostCommand()
        {
        }

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

        public DisconnectHostCommand(IMainWindow mainWindow, SelectedItem selection)
            : base(mainWindow, selection)
        {
        }

        protected override bool CanRunCore(SelectedItemCollection selection)
        {
            foreach (SelectedItem item in selection)
            {
                if (CanRun(item))
                {
                    return true;
                }
            }

            return false;
        }

        private static bool CanRun(SelectedItem selection)
        {
            IXenConnection connection = selection.Connection;
            Host host = selection.XenObject as Host;
            bool is_host = (host != null 
                );
            bool is_coordinator = is_host && host.IsCoordinator();
            bool connected = connection != null && connection.IsConnected;

            return (connected && is_coordinator) || (connection != null && connection.InProgress && !connection.IsConnected);
        }

        protected override void RunCore(SelectedItemCollection selection)
        {
            foreach (SelectedItem item in selection)
            {
                if (CanRun(item))
                {
                    new DisconnectCommand(MainWindowCommandInterface, item.Connection, true).Run();
                }
            }
        }

        public override string MenuText
        {
            get
            {
                return Messages.MAINWINDOW_DISCONNECT;
            }
        }

        public override string ContextMenuText
        {
            get
            {
                return Messages.MAINWINDOW_DISCONNECT_CONTEXT_MENU;
            }
        }
    }
}