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using System.Collections.Generic;
using XenAdmin.Actions;
using XenAdmin.Dialogs;
using XenAPI;
using XenAdmin.Actions.VMActions;
using System.Windows.Forms;


namespace XenAdmin.Commands
{
    /// <summary>
    /// Converts the selected VM to a template. Shows a confirmation dialog.
    /// </summary>
    internal class ConvertVMToTemplateCommand : 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 ConvertVMToTemplateCommand()
        {
        }

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

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

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

            using (var dlg = new WarningDialog(string.Format(Messages.CONVERT_TEMPLATE_DIALOG_TEXT, vm.Name().Ellipsise(25)),
                        new ThreeButtonDialog.TBDButton(Messages.CONVERT, DialogResult.OK, selected: true),
                        ThreeButtonDialog.ButtonCancel){WindowTitle = Messages.CONVERT_TO_TEMPLATE})
            {
                if (dlg.ShowDialog() == DialogResult.OK)
                {
                    List<AsyncAction> actions = new List<AsyncAction>();
                    actions.Add(new SetVMOtherConfigAction(vm.Connection, vm, "instant", "true"));
                    actions.Add(new VMToTemplateAction(vm));

                    XenDialogBase.CloseAll(vm);

                    RunMultipleActions(actions, string.Format(Messages.ACTION_VM_TEMPLATIZING_TITLE, vm.Name()),
                                       Messages.ACTION_VM_TEMPLATIZING, Messages.ACTION_VM_TEMPLATIZED, true);
                }
            }
        }

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

        private static bool CanRun(VM vm)
        {
            return vm != null && !vm.is_a_template && !vm.Locked && vm.allowed_operations != null && vm.allowed_operations.Contains(vm_operations.make_into_template);
        }

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

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