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using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Drawing;
using XenAPI;


namespace XenAdmin.Commands
{
    /// <summary>
    /// Shuts down the selected VMs or Hosts.
    /// </summary>
    internal class ShutDownCommand : 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 ShutDownCommand()
        {
        }

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

        protected override void RunCore(SelectedItemCollection selection)
        {
            Command cmd = new ShutDownHostCommand(MainWindowCommandInterface, selection);

            if (cmd.CanRun())
            {
                cmd.Run();
            }
            else
            {
                cmd = new ShutDownVMCommand(MainWindowCommandInterface, selection);

                if (cmd.CanRun())
                {
                    cmd.Run();
                }
            }
        }

        protected override bool CanRunCore(SelectedItemCollection selection)
        {
            return new ShutDownVMCommand(MainWindowCommandInterface, selection).CanRun() || new ShutDownHostCommand(MainWindowCommandInterface, selection).CanRun();
        }

        public override Image ToolBarImage => Images.StaticImages._001_ShutDown_h32bit_24;

        public override string EnabledToolTipText
        {
            get
            {
                ReadOnlyCollection<SelectedItem> selection = GetSelection();
                if (selection.Count == 1 && selection[0].XenObject is Host)
                {
                    return Messages.MAINWINDOW_TOOLBAR_SHUTDOWNSERVER;
                }
                return Messages.MAINWINDOW_TOOLBAR_SHUTDOWNVM;
            }
        }

        public override string ToolBarText => Messages.MAINWINDOW_TOOLBAR_SHUTDOWN;
    }
}