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using System;
using System.Collections.Generic;
using System.Text;
using System.Collections.ObjectModel;
using XenAdmin.Actions;
using XenAdmin.Controls;
using XenAdmin.Model;
using XenAPI;
using System.Linq;


namespace XenAdmin.Commands
{
    internal class RemoveFromFolderCommand : Command
    {
        private readonly IList<VirtualTreeNode> _nodes;

        public RemoveFromFolderCommand(IMainWindow mainWindow, IList<VirtualTreeNode> nodes)
            : base(mainWindow)
        {
            Util.ThrowIfParameterNull(nodes, "nodes");
            _nodes = nodes;
        }

        protected override bool CanExecuteCore(SelectedItemCollection selection)
        {
            if (_nodes.Count > 0)
            {
                foreach (VirtualTreeNode node in _nodes)
                {
                    if (node.Parent == null || node.Tag is Folder || !(node.Tag is IXenObject))
                    {
                        return false;
                    }

                    Folder f = node.Parent.Tag as Folder;

                    if (f == null || f.IsRootFolder)
                    {
                        return false;
                    }
                }
                return true;
            }
            return false;
        }

        protected override void ExecuteCore(SelectedItemCollection selection)
        {
            var objectsToBeRemoved = (from VirtualTreeNode node in _nodes
                                    let xenObject = node.Tag as IXenObject
                                    where xenObject != null
                                    select xenObject).ToList();

            new FolderAction(objectsToBeRemoved, null, FolderAction.Kind.Delete).RunAsync();
        }

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