/*
 * Copyright (c) 2006-2016, openmetaverse.co
 * 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.
 * - Neither the name of the openmetaverse.co nor the names 
 *   of its contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * 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 OWNER 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.Drawing;
using System.Windows.Forms;

namespace OpenMetaverse.GUI
{

    /// <summary>
    /// TreeView GUI component for browsing a client's inventory
    /// </summary>
    public class InventoryTree : TreeView
    {
        private GridClient _Client;
        private ContextMenu _ContextMenu;
        private UUID _SelectedItemID;

        /// <summary>
        /// Gets or sets the context menu associated with this control
        /// </summary>
        public ContextMenu Menu
        {
            get { return _ContextMenu; }
            set { _ContextMenu = value; }
        }

        /// <summary>
        /// Gets or sets the GridClient associated with this control
        /// </summary>
        public GridClient Client
        {
            get { return _Client; }
            set { if (value != null) InitializeClient(value); }
        }

        /// <summary>
        /// TreeView control for an unspecified client's inventory
        /// </summary>
        public InventoryTree()
        {
            EventHandler clickHandler = new EventHandler(defaultMenuItem_Click);
            _ContextMenu = new ContextMenu();
            _ContextMenu.MenuItems.Add("Wear", clickHandler);
            _ContextMenu.MenuItems.Add("Detach", clickHandler);

            this.NodeMouseClick += new TreeNodeMouseClickEventHandler(InventoryTree_NodeMouseClick);
            this.BeforeExpand += new TreeViewCancelEventHandler(InventoryTree_BeforeExpand);
        }

        /// <summary>
        /// TreeView control for the specified client's inventory
        /// </summary>
        /// <param name="client"></param>
        public InventoryTree(GridClient client) : this ()
        {
            InitializeClient(client);
        }

        /// <summary>
        /// Thread-safe method for clearing the TreeView control
        /// </summary>
        public void ClearNodes()
        {
            if (this.InvokeRequired) this.BeginInvoke((MethodInvoker)delegate { ClearNodes(); });
            else this.Nodes.Clear();
        }

        /// <summary>
        /// Thread-safe method for collapsing a TreeNode in the control
        /// </summary>
        /// <param name="node"></param>
        public void CollapseNode(TreeNode node)
        {
            if (this.InvokeRequired) this.BeginInvoke((MethodInvoker)delegate { CollapseNode(node); });
            else if (!node.IsExpanded) node.Collapse();
        }

        /// <summary>
        /// Thread-safe method for expanding a TreeNode in the control
        /// </summary>
        /// <param name="node"></param>
        public void ExpandNode(TreeNode node)
        {
            if (this.InvokeRequired) this.BeginInvoke((MethodInvoker)delegate { ExpandNode(node); });
            else if (!node.IsExpanded) node.Expand();
        }

        /// <summary>
        /// Thread-safe method for updating the contents of the specified folder UUID
        /// </summary>
        /// <param name="folderID"></param>
        public void UpdateFolder(UUID folderID)
        {
            if (this.InvokeRequired) this.BeginInvoke((MethodInvoker)delegate { UpdateFolder(folderID); });
            else
            {
                TreeNode node = null;
                TreeNodeCollection children;

                if (folderID != Client.Inventory.Store.RootFolder.UUID)
                {
                    TreeNode[] found = Nodes.Find(folderID.ToString(), true);
                    if (found.Length > 0)
                    {
                        node = found[0];
                        children = node.Nodes;
                    }
                    else
                    {
                        Logger.Log("Received update for unknown TreeView node " + folderID, Helpers.LogLevel.Warning);
                        return;
                    }
                }
                else children = this.Nodes;

                children.Clear();

                List<InventoryBase> contents = Client.Inventory.Store.GetContents(folderID);
                if (contents.Count == 0)
                {
                    TreeNode add = children.Add(null, "(empty)");
                    add.ForeColor = Color.FromKnownColor(KnownColor.GrayText);
                }
                else
                {
                    foreach (InventoryBase inv in contents)
                    {
                        string key = inv.UUID.ToString();

                        children.Add(key, inv.Name);
                        if (inv is InventoryFolder)
                        {
                            children[key].Nodes.Add(null, "(loading...)").ForeColor = Color.FromKnownColor(KnownColor.GrayText);
                        }
                    }
                }
            }
        }

        private void InitializeClient(GridClient client)
        {
            _Client = client;
            _Client.Inventory.FolderUpdated += Inventory_OnFolderUpdated;
            _Client.Network.LoginProgress += Network_OnLogin;
        }

        private void defaultMenuItem_Click(object sender, EventArgs e)
        {
            MenuItem menuItem = (MenuItem)sender;

            InventoryItem item = (InventoryItem)Client.Inventory.Store[_SelectedItemID];

            switch(menuItem.Text)
            {
                case "Wear":
                    {
                        Client.Appearance.Attach(item, AttachmentPoint.Default);
                        break;
                    }
                case "Detach":
                    {
                        Client.Appearance.Detach(item);
                        break;
                    }
            }
        }

        void Network_OnLogin(object sender, LoginProgressEventArgs e)
        {
            if (e.Status == LoginStatus.Success)
            {
                if (Client.Inventory.Store != null)
                    UpdateFolder(Client.Inventory.Store.RootFolder.UUID);
            }
        }

        private void Inventory_OnFolderUpdated(object sender, FolderUpdatedEventArgs e)
        {
            UpdateFolder(e.FolderID);
        }

        void InventoryTree_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
        {
            if (e.Button == MouseButtons.Right)
            {
                _SelectedItemID = new UUID(e.Node.Name);
                _ContextMenu.Show(this, e.Location);
            }
        }

        private void InventoryTree_BeforeExpand(object sender, TreeViewCancelEventArgs e)
        {
            InventoryFolder folder = (InventoryFolder)Client.Inventory.Store[new UUID(e.Node.Name)];
            Client.Inventory.RequestFolderContents(folder.UUID, _Client.Self.AgentID, true, true, InventorySortOrder.ByDate | InventorySortOrder.FoldersByName);
        }

    }

}