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using System;
using System.Collections.Generic;
using System.Text;
using XenAdmin.Network;
using XenAPI;
using XenAdmin.Actions;
using System.Collections.ObjectModel;


namespace XenAdmin.Commands
{
    /// <summary>
    /// Removes the selected hosts.
    /// </summary>
    internal class RemoveHostCommand : Command
    {
        private static readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

        /// <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 RemoveHostCommand()
        {
        }

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

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

        protected override void ExecuteCore(SelectedItemCollection selection)
        {
            MainWindowCommandInterface.SelectObjectInTree(null);

            foreach (Host host in selection.AsXenObjects<Host>())
            {
                string msg = string.Format(Messages.MAINWINDOW_LOG_REMOVECONNECTION, host.Connection.Hostname);
                log.Info(msg);
                new ActionBase(msg, msg, false, true);
                MainWindowCommandInterface.CloseActiveWizards(host.Connection);
                host.Connection.EndConnect();
                MainWindowCommandInterface.RemoveConnection(host.Connection);
            }

            MainWindowCommandInterface.SaveServerList();
            MainWindowCommandInterface.RequestRefreshTreeView();
        }

        private static bool CanExecute(Host host)
        {
            bool disconnected = host.Connection != null && !host.Connection.IsConnected;
            return disconnected || host.IsMaster();
        }

        protected override bool CanExecuteCore(SelectedItemCollection selection)
        {
            return selection.AllItemsAre<Host>(CanExecute);
        }

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