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using System;
using System.Collections.Generic;
using System.Text;
using XenAPI;
using XenAdmin.Dialogs;
using System.Collections.ObjectModel;


namespace XenAdmin.Commands
{
    /// <summary>
    /// Launches the Copy-VM dialog for the selected VM.
    /// </summary>
    internal class CopyVMCommand : 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 CopyVMCommand()
        {
        }

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

        public CopyVMCommand(IMainWindow mainWindow, VM vm)
            : base(mainWindow, vm)
        {
        }

        protected override void ExecuteCore(SelectedItemCollection selection)
        {
            VM vm = (VM)selection[0].XenObject;

            MainWindowCommandInterface.ShowPerXenModelObjectWizard(vm, new CopyVMDialog(vm));
        }

        protected override bool CanExecuteCore(SelectedItemCollection selection)
        {
            return selection.ContainsOneItemOfType<VM>() && selection.AtLeastOneXenObjectCan<VM>(CanExecute);
        }

        private static bool CanExecute(VM vm)
        {
            if (vm != null && !vm.is_a_template && !vm.Locked)
            {
                if (vm.allowed_operations != null && vm.allowed_operations.Contains(vm_operations.export) && vm.power_state != vm_power_state.Suspended)
                {
                    return true;
                }
            }

            return false;
        }

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