/* Copyright (c) Citrix Systems Inc. 
 * All rights reserved. 
 * 
 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
 * that the following conditions are met: 
 * 
 * *   Redistributions of source code must retain the above 
 *     copyright notice, this list of conditions and the 
 *     following disclaimer. 
 * *   Redistributions in binary form must reproduce the above 
 *     copyright notice, this list of conditions and the 
 *     following disclaimer in the documentation and/or other 
 *     materials provided with the distribution. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
 * SUCH DAMAGE.
 */

using System;
using System.Collections.Generic;
using System.Text;
using XenAdmin.Network;
using XenAdmin.Model;
using System.Windows.Forms;
using XenAdmin.Properties;
using System.Drawing;
using XenAdmin.Dialogs;
using System.Collections.ObjectModel;
using System.Threading;
using XenAdmin.Actions;
using XenAPI;


namespace XenAdmin.Commands
{
    /// <summary>
    /// Launches the dialog for creating a new folder.
    /// </summary>
    internal class NewFolderCommand : 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 NewFolderCommand()
        {
        }

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

        public NewFolderCommand(IMainWindow mainWindow, Folder folder)
            : base(mainWindow, folder)
        {
        }

        public NewFolderCommand(IMainWindow mainWindow, Folder folder, Control parent)
            : base(mainWindow, folder)
        {
            SetParent(parent);
        }

        private void Execute(Folder folder, IWin32Window ownerWindow)
        {
            IXenConnection connection;
            String name;

            // Different dialogs depending whether we're at the top level or adding a subfolder.
            // Also offer them a choice of connections if the connection they're on is Read Only
            // (although we will also sudo a Read Only command when the FolderAction is run).
            if (folder == null || folder.IsRootFolder || folder.Connection == null || CrossConnectionCommand.IsReadOnly(folder.Connection))
            {
                NameAndConnectionPrompt dialog = new NameAndConnectionPrompt();
                dialog.Text = Messages.NEW_FOLDER_DIALOG_TITLE;
                dialog.OKText = Messages.CREATE_MNEMONIC_R;
                dialog.HelpID = "NewFolderDialog";
                if (dialog.ShowDialog(ownerWindow) != DialogResult.OK)
                    return;
                name = dialog.PromptedName;
                connection = dialog.Connection;
            }
            else
            {
                name = InputPromptDialog.Prompt(ownerWindow, Messages.NEW_FOLDER_NAME, Messages.NEW_FOLDER_DIALOG_TITLE, "NewFolderDialog");
                connection = folder.Connection;
            }

            if (name == null)
                return;  // Happens if InputPromptDialog was cancelled

            List<string> newPaths = new List<string>();
            foreach (string s in name.Split(';'))
            {
                string n = s;
                Folders.FixupRelativePath(ref n);
                if (n == null || n == String.Empty)
                    continue;

                newPaths.Add(Folders.AppendPath(folder == null ? Folders.PATH_SEPARATOR : folder.opaque_ref, n));
            }

            if (newPaths.Count > 0)
            {
                FolderAction action = new FolderAction(connection, FolderAction.Kind.New, newPaths.ToArray());

                EventHandler<EventArgs> completed = null;
                completed = delegate
                {
                    action.Completed -= completed;
                    if (action.Succeeded)
                    {
                        Program.MainWindow.TrySelectNewNode(delegate(object o)
                        {
                            Folder ff = o as Folder;
                            return ff != null && newPaths[0] == ff.opaque_ref;
                        }, true, true, true);
                    }
                };

                action.Completed += completed;
                action.RunAsync();
            }
        }

        protected override void ExecuteCore(SelectedItemCollection selection)
        {
            Execute((Folder)selection[0].XenObject, Parent);
        }

        protected override bool CanExecuteCore(SelectedItemCollection selection)
        {
            return selection.ContainsOneItemOfType<Folder>() && ConnectionAvailable();
        }

        private bool ConnectionAvailable()
        {
            foreach (IXenConnection connection in MainWindowCommandInterface.GetXenConnectionsCopy())
            {
                if (connection.IsConnected)
                    return true;
            }
            return false;
        }

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

        public override Image MenuImage
        {
            get
            {
                return Resources._000_Folder_open_h32bit_16;
            }
        }

        protected override string GetCantExecuteReasonCore(SelectedItem item)
        {
            return ConnectionAvailable() ? base.GetCantExecuteReasonCore(item) : Messages.FOLDER_NO_CONNECTION;
        }
    }
}