using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Xml.Linq;
using ClientDependency.Core;
using umbraco.cms.presentation.Trees;
using umbraco.controls.Images;
using umbraco.controls.Tree;
using umbraco.IO;

[assembly: WebResource("umbraco.editorControls.MultiNodeTreePicker.MultiNodePickerStyles.css", "text/css")]
[assembly: WebResource("umbraco.editorControls.MultiNodeTreePicker.MultiNodePickerScripts.js", "application/x-javascript")]

namespace umbraco.editorControls.MultiNodeTreePicker
{
    /// <summary>
    /// The user interface to display to the content editor
    /// </summary>
    [ClientDependency(ClientDependencyType.Javascript, "ui/jqueryui.js", "UmbracoClient")]
    [ClientDependency(ClientDependencyType.Javascript, "ui/jquery.tooltip.min.js", "UmbracoClient")]
    [ClientDependency(ClientDependencyType.Javascript, "controls/Images/ImageViewer.js", "UmbracoRoot")]
    public class MNTP_DataEditor : Control, INamingContainer
    {
        #region Static Constructor

        /// <summary>
        /// This adds our filtered tree definition to the TreeDefinitionCollection at runtime
        /// instead of having to declare it in the database 
        /// </summary>
        static MNTP_DataEditor()
        {
            if (TreeDefinitionCollection.Instance
                        .Where(x => x.TreeType == typeof(FilteredContentTree))
                        .Count() == 0)
            {
                lock (m_Locker)
                {
                    //double check lock....

                    if (TreeDefinitionCollection.Instance
                            .Where(x => x.TreeType == typeof(FilteredContentTree))
                            .Count() == 0)
                    {
                        //need to add our tree definitions to the collection.

                        //find the content tree to duplicate
                        var contentTree = TreeDefinitionCollection.Instance.Where(x => x.Tree.Alias.ToUpper() == "CONTENT").Single();
                        var filteredContentTree = new TreeDefinition(typeof(FilteredContentTree),
                            new umbraco.BusinessLogic.ApplicationTree(true, false, 0,
                                contentTree.Tree.ApplicationAlias,
                                "FilteredContentTree",
                                contentTree.Tree.Title,
                                contentTree.Tree.IconClosed,
                                contentTree.Tree.IconOpened,
                                "umbraco.editorControls",
                                "MultiNodeTreePicker.FilteredContentTree",
                                contentTree.Tree.Action),
                            contentTree.App);

                        //find the media tree to duplicate
                        var mediaTree = TreeDefinitionCollection.Instance.Where(x => x.Tree.Alias.ToUpper() == "MEDIA").Single();
                        var filteredMediaTree = new TreeDefinition(typeof(FilteredMediaTree),
                            new umbraco.BusinessLogic.ApplicationTree(true, false, 0,
                                mediaTree.Tree.ApplicationAlias,
                                "FilteredMediaTree",
                                contentTree.Tree.Title,
                                contentTree.Tree.IconClosed,
                                contentTree.Tree.IconOpened,
                                "umbraco.editorControls",
                                "MultiNodeTreePicker.FilteredMediaTree",
                                contentTree.Tree.Action),
                            contentTree.App);

                        //add it to the collection at runtime
                        TreeDefinitionCollection.Instance.Add(filteredContentTree);
                        TreeDefinitionCollection.Instance.Add(filteredMediaTree);
                    }
                }
            }
        }

        #endregion

        /// <summary>
        /// Initializes a new instance of the <see cref="MNTP_DataEditor"/> class.
        /// </summary>
        public MNTP_DataEditor()
        {
            this.MediaTypesWithThumbnails = new string[] { "image" };
            ShowThumbnailsForMedia = true;
            TreeToRender = "content";
            MaxNodeCount = -1;
            MinNodeCount = 0;
            StartNodeId = uQuery.RootNodeId;
            ShowToolTips = true;
            ControlHeight = 200;
        }

        #region Static members
        /// <summary>
        /// Used for locking code blocks
        /// </summary>
        private static readonly object m_Locker = new object();
        #endregion

        #region Protected members

        /// <summary>
        /// 
        /// </summary>
        protected CustomValidator MinItemsValidator;

        /// <summary>
        /// 
        /// </summary>
        protected CustomTreeControl TreePickerControl;

        /// <summary>
        /// 
        /// </summary>
        protected Repeater SelectedValues;

        /// <summary>
        /// 
        /// </summary>
        protected HiddenField PickedValue;

        /// <summary>
        /// 
        /// </summary>
        protected HtmlGenericControl RightColumn;
        #endregion

        #region public Properties

        /// <summary>
        /// gets/sets the value based on an array of IDs selected
        /// </summary>
        public string[] SelectedIds
        {
            get
            {
                List<string> val = new List<string>();
                var splitVals = PickedValue.Value.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
                //this will make sure only the node count specified is saved
                //into umbraco, even if people try to hack the front end for whatever reason.
                if (MaxNodeCount >= 0)
                {
                    for (var i = 0; i < splitVals.Length; i++)
                    {
                        if (i < MaxNodeCount)
                        {
                            val.Add(splitVals[i]);
                        }
                        else break;
                    }
                }
                else
                {
                    val = splitVals.ToList();
                }
                return val.ToArray();
            }
            set
            {
                XmlValue = ConvertToXDocument(value);
            }
        }

        /// <summary>
        /// get/set the value for the selected nodes in xml format
        /// </summary>
        public XDocument XmlValue
        {
            get
            {
                return ConvertToXDocument(SelectedIds);
            }
            set
            {
                if (value == null)
                {
                    SelectedValues.DataSource = null;
                    PickedValue.Value = "";
                }
                else
                {
                    //set the data source for the repeater and hidden field
                    var nodes = value.Descendants("nodeId");
                    SelectedValues.DataSource = nodes;
                    PickedValue.Value = string.Join(",", nodes.Select(x => x.Value).ToArray());
                }
            }
        }

        /// <summary>
        /// The property name being edited with the current data editor. This is used for the min items validation statement.
        /// </summary>
        public string PropertyName { get; set; }

        /// <summary>
        /// The tree type alias to render
        /// </summary>
        public string TreeToRender { get; set; }

        /// <summary>
        ///  An xpath filter to match nodes that will be disabled from being clicked
        /// </summary>
        public string XPathFilter { get; set; }

        /// <summary>
        /// The minimum amount of nodes that can be selected
        /// </summary>
        public int MinNodeCount { get; set; }

        /// <summary>
        /// The maximum amount of nodes that can be selected
        /// </summary>
        public int MaxNodeCount { get; set; }

        /// <summary>
        /// The start node id
        /// </summary>
        public int StartNodeId { get; set; }

        /// <summary>
        /// The start node selection type
        /// </summary>
        public NodeSelectionType StartNodeSelectionType { get; set; }

        /// <summary>
        /// The xpath expression type to select the start node when the StartNodeSelectionType is XPath
        /// </summary>
        public XPathExpressionType StartNodeXPathExpressionType { get; set; }

        /// <summary>
        /// The XPath expression to use to determine the start node when the StartNodeSelectionType is XPath
        /// </summary>
        public string StartNodeXPathExpression { get; set; }

        /// <summary>
        /// Gets or sets a value indicating whether [show tool tips].
        /// </summary>
        /// <value><c>true</c> if [show tool tips]; otherwise, <c>false</c>.</value>
        /// <remarks>Shows/Hides the tooltip info bubble.</remarks>
        public bool ShowToolTips { get; set; }

        /// <summary>
        /// The XPathFilterType to match
        /// </summary>
        public XPathFilterType XPathFilterMatchType { get; set; }

        /// <summary>
        /// Gets or sets a value indicating whether [show thumbnails for media].
        /// </summary>
        /// <value>
        /// 	<c>true</c> if [show thumbnails for media]; otherwise, <c>false</c>.
        /// </value>
        /// <remarks>Whether or not to show thumbnails for media</remarks>
        public bool ShowThumbnailsForMedia { get; set; }

        /// <summary>
        /// A list of media type names that can have thumbnails (i.e. 'image')
        /// </summary>
        public string[] MediaTypesWithThumbnails { get; set; }

        /// <summary>
        /// This is set by the data type and allows us to save a cookie value
        /// for persistence for the data type.
        /// </summary>
        public int DataTypeDefinitionId { get; set; }

        /// <summary>
        /// The height of the tree control box in pixels
        /// </summary>
        public int ControlHeight { get; set; }

        #endregion

        /// <summary>
        /// Initialize the control, make sure children are created
        /// </summary>
        /// <param name="e">An <see cref="T:System.EventArgs"/> object that contains the event data.</param>
        protected override void OnInit(EventArgs e)
        {
            base.OnInit(e);

            EnsureChildControls();
        }

        /// <summary>
        /// Add the resources (sytles/scripts)
        /// </summary>
        /// <param name="e"></param>
        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);

            //add the js/css required
            this.RegisterEmbeddedClientResource("umbraco.editorControls.MultiNodeTreePicker.MultiNodePickerStyles.css", umbraco.cms.businesslogic.datatype.ClientDependencyType.Css);
            this.RegisterEmbeddedClientResource("umbraco.editorControls.MultiNodeTreePicker.MultiNodePickerScripts.js", umbraco.cms.businesslogic.datatype.ClientDependencyType.Javascript);

            //update the tree type (we need to do this each time because i don't think view state works with these controls)
            switch (TreeToRender)
            {
                case "media":
                    TreePickerControl.TreeType = "FilteredMediaTree";
                    TreePickerControl.App = "media";
                    break;
                case "content":
                default:
                    TreePickerControl.TreeType = "FilteredContentTree";
                    TreePickerControl.App = "content";
                    break;
            }

            if (Page.IsPostBack)
            {
                //since it is a post back, bind the data source to the view state values
                XmlValue = ConvertToXDocument(SelectedIds);
            }

            //bind the repeater if theres a data source, or if there's no datasource but this is a postback (i.e. nodes deleted)
            if (SelectedValues.DataSource != null || Page.IsPostBack)
            {
                SelectedValues.DataBind();
            }

        }

        /// <summary>
        /// Creates the child controls for this control
        /// </summary>
        protected override void CreateChildControls()
        {
            base.CreateChildControls();

            EnsureChildControls();

            //create the tree control
            TreePickerControl = new CustomTreeControl
                {
                    ID = "TreePicker",
                    IsDialog = true,
                    ShowContextMenu = false,
                    DialogMode = TreeDialogModes.id,
                    Height = Unit.Pixel(ControlHeight),
                    StartNodeID = StartNodeId
                };

            //create the hidden field
            PickedValue = new HiddenField { ID = "PickedValue" };

            //create the right column
            RightColumn = new HtmlGenericControl("div") { ID = "RightColumn" };
            RightColumn.Attributes.Add("class", "right propertypane");

            //create the repeater
            SelectedValues = new Repeater
                {
                    //EnableViewState = false,
                    ID = "SelectedValues",
                    ItemTemplate = new SelectedItemsTemplate()
                };

            SelectedValues.ItemDataBound += SelectedValues_ItemDataBound;

            //add the repeater to the right column
            RightColumn.Controls.Add(SelectedValues);

            MinItemsValidator = new CustomValidator()
                                    {
                                        ID = "MinItemsValidator",
                                        ErrorMessage =
                                            string.Format(MNTPResources.Val_MinItemsInvalid, MinNodeCount)
                                    };
            MinItemsValidator.ServerValidate += new ServerValidateEventHandler(MinItemsValidator_ServerValidate);

            //add the controls
            this.Controls.Add(MinItemsValidator);
            this.Controls.Add(TreePickerControl);
            this.Controls.Add(PickedValue);
            this.Controls.Add(RightColumn);
        }



        /// <summary>
        /// Ensure the repeater is data bound
        /// </summary>
        public override void DataBind()
        {
            base.DataBind();
            SelectedValues.DataBind();
        }

        void MinItemsValidator_ServerValidate(object source, ServerValidateEventArgs args)
        {
            args.IsValid = true;
            if (MinNodeCount > 0 && SelectedIds.Length < MinNodeCount)
            {
                args.IsValid = false;
            }
        }

        /// <summary>
        /// Event handler for the selected node repeater. 
        /// This will fill in all of the text values, icons, etc.. for nodes based on their ID.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        void SelectedValues_ItemDataBound(object sender, RepeaterItemEventArgs e)
        {
            var liSelectNode = (HtmlGenericControl)e.Item.FindControl("SelectedNodeListItem");
            var lnkSelectNode = (HtmlAnchor)e.Item.FindControl("SelectedNodeLink");
            var litSelectNodeName = (Literal)e.Item.FindControl("SelectedNodeText");
            var infoButton = (HtmlAnchor)e.Item.FindControl("InfoButton");

            //hide the info button if tooltips are hidden
            if (!ShowToolTips)
            {
                infoButton.Style.Add(HtmlTextWriterStyle.Display, "none");
            }

            var thisNode = (XElement)e.Item.DataItem;
            int thisNodeId;
            if (int.TryParse(thisNode.Value, out thisNodeId))
            {
                umbraco.cms.businesslogic.Content loadedNode;

                try
                {
                    loadedNode = new umbraco.cms.businesslogic.Content(thisNodeId);

                    //add the node id
                    liSelectNode.Attributes["rel"] = thisNodeId.ToString();
                    //add the path to be referenced
                    liSelectNode.Attributes["umb:nodedata"] = loadedNode.Path;
                    lnkSelectNode.HRef = "javascript:void(0);";
                    litSelectNodeName.Text = loadedNode.Text;

                    if (loadedNode.IsTrashed)
                    {
                        //need to flag this to be removed which will be done after all items are data bound
                        liSelectNode.Attributes["rel"] = "trashed";
                    }
                    else
                    {
                        //we need to set the icon
                        if (loadedNode.ContentTypeIcon.StartsWith(".spr"))
                            lnkSelectNode.Attributes["class"] += " " + loadedNode.ContentTypeIcon.TrimStart('.');
                        else
                        {
                            //it's a real icon, so make it a background image
                            lnkSelectNode.Style.Add(HtmlTextWriterStyle.BackgroundImage,
                                string.Format("url('{0}')", IconPath + loadedNode.ContentTypeIcon));
                            //set the nospr class since it's not a sprite
                            lnkSelectNode.Attributes["class"] += " noSpr";
                        }

                        //show the media preview if media and allowed                    
                        if (TreeToRender == "media" && ShowThumbnailsForMedia)
                        {
                            var imgPreview = (ImageViewer)e.Item.FindControl("ImgPreview");
                            //show the thubmnail controls
                            imgPreview.Visible = true;

                            //add the item class
                            var item = (HtmlGenericControl)e.Item.FindControl("Item");
                            item.Attributes["class"] += " thumb-item";

                            //item.Style.Add(HtmlTextWriterStyle.Height, "50px");
                            ////make the content sit beside the item
                            //var inner = (HtmlGenericControl)e.Item.FindControl("InnerItem");
                            //inner.Style.Add(HtmlTextWriterStyle.Width, "224px");

                            //check if it's a thumbnail type element, we need to check both schemas                        
                            if (MediaTypesWithThumbnails.Select(x => x.ToUpper())
                                .Contains(loadedNode.ContentType.Alias.ToUpper()))
                            {
                                imgPreview.MediaId = thisNodeId;
                                imgPreview.DataBind();
                            }
                        }
                    }

                }
                catch (ArgumentException)
                {
                    //the node no longer exists, so we display a msg
                    litSelectNodeName.Text = "<i>NODE NO LONGER EXISTS</i>";
                }
            }
        }

        /// <summary>
        /// set the nodekey to the id of this datatype
        /// </summary>
        /// <remarks>
        /// this is how get the xpath out of the cookie to know how the tree knows how to filter things.
        /// generally the nodekey is used for a string id, but we'll use it for something different.
        /// </remarks>
        /// <param name="e"></param>
        protected override void OnPreRender(EventArgs e)
        {
            base.OnPreRender(e);

            TreePickerControl.NodeKey = this.DataTypeDefinitionId.ToString();

            SavePersistentValuesForTree(XPathFilter);
        }

        /// <summary>
        /// Override render to control the exact output of what is rendered this includes instantiating the jquery plugin
        /// </summary>
        /// <param name="writer">The <see cref="T:System.Web.UI.HtmlTextWriter"/> object that receives the server control content.</param>
        /// <remarks>
        /// Generally i don't like to do this but there's a few div's, etc... to render so this makes more sense.
        /// </remarks>
        protected override void Render(HtmlTextWriter writer)
        {
            //<div class="multiTreePicker">
            //    <div class="header propertypane">
            //        <div>Select items</div>
            //    </div>
            //    <div class="left propertypane">        
            //        <umb:tree runat="server" ID="TreePickerControl" 
            //            CssClass="myTreePicker" Mode="Standard" 
            //            DialogMode="id" ShowContextMenu="false" 
            //            IsDialog="true" TreeType="content" />
            //    </div>
            //    <div class="right propertypane">
            //    </div>
            //</div>

            RenderTooltip(writer);

            writer.AddAttribute("class", (!MinItemsValidator.IsValid ? "error " : "") + "multiNodePicker clearfix");
            writer.AddAttribute("id", this.ClientID);
            writer.RenderBeginTag(HtmlTextWriterTag.Div);

            writer.AddAttribute("class", "header propertypane");
            writer.RenderBeginTag(HtmlTextWriterTag.Div);
            writer.RenderBeginTag(HtmlTextWriterTag.Div);
            writer.Write("Select Items");
            writer.RenderEndTag();
            writer.RenderEndTag();

            writer.AddAttribute("class", "left propertypane");
            writer.AddStyleAttribute(HtmlTextWriterStyle.Height, ((ControlHeight + 10).ToString() + "px"));
            writer.RenderBeginTag(HtmlTextWriterTag.Div);
            //add the tree control here
            TreePickerControl.RenderControl(writer);
            writer.RenderEndTag();

            RightColumn.RenderControl(writer);

            //render the hidden field
            PickedValue.RenderControl(writer);

            writer.RenderEndTag(); //end multiNodePicker div

            var tooltipAjaxUrl = IOHelper.ResolveUrl(SystemDirectories.Umbraco) + @"/controls/Tree/CustomTreeService.asmx/GetNodeInfo";

            //add jquery window load event to create the js tree picker
            var jsMethod = string.Format("jQuery('#{0}').MultiNodeTreePicker('{1}', {2}, '{3}', {4}, {5}, '{6}', '{7}');",
                TreePickerControl.ClientID,
                this.ClientID,
                MaxNodeCount,
                tooltipAjaxUrl,
                ShowToolTips.ToString().ToLower(),
                (TreeToRender == "media" && ShowThumbnailsForMedia).ToString().ToLower(),
                IOHelper.ResolveUrl(SystemDirectories.Umbraco),
                TreeToRender);
            var js = "jQuery(window).load(function() { " + jsMethod + " });";

            writer.WriteLine("<script type='text/javascript'>" + js + "</script>");

        }

        /// <summary>
        /// converts a list of Ids to the XDocument structure
        /// </summary>
        /// <param name="val">The value.</param>
        /// <returns></returns>
        private XDocument ConvertToXDocument(IEnumerable<string> val)
        {
            if (val.Count() > 0)
            {
                return new XDocument(new XElement("MultiNodePicker",
                    new XAttribute("type", TreeToRender),
                    val.Select(x => new XElement("nodeId", x.ToString()))));
            }
            else
            {
                //return null to support recursive values
                return null;

                //return an empty node set
                //return new XDocument(new XElement("MultiNodePicker"));
            }
        }

        /// <summary>
        /// this will render the tooltip object on the page so long as another 
        /// one hasn't already been registered. There should only be one tooltip.
        /// </summary>
        private void RenderTooltip(HtmlTextWriter writer)
        {
            if (this.Page.Items.Contains("MNTPTooltip"))
            {
                return;
            }

            //render the tooltip holder
            //<div class="tooltip">
            //  <div class="throbber"></div>
            //  <div class="tooltipInfo"></div>
            //</div>
            //this.Page.Controls.AddAt(0, new LiteralControl("<div id='MNTPTooltip'><div class='throbber'></div><div class='tooltipInfo'></div></div>"));
            writer.AddAttribute("id", "MNTPTooltip");
            writer.RenderBeginTag(HtmlTextWriterTag.Div);
            writer.AddAttribute("class", "throbber");
            writer.RenderBeginTag(HtmlTextWriterTag.Div);
            writer.RenderEndTag(); //end throbber
            writer.AddAttribute("class", "tooltipInfo");
            writer.RenderBeginTag(HtmlTextWriterTag.Div);
            writer.RenderEndTag(); //end tooltipInfo
            writer.RenderEndTag(); //end tooltipo

            //ensure we add this to our page items so it's not duplicated
            this.Page.Items.Add("MNTPTooltip", true);
        }

        /// <summary>
        /// This will update the multi-node tree picker data which is used to store
        /// the xpath data and xpath match type for this control id.
        /// </summary>
        /// <param name="xpath">The xpath.</param>
        /// <remarks>
        /// This will save the data into a cookie and also into the request cookie. It must save
        /// it to both locations in case the request cookie has been changed and the request cookie
        /// is different than the response cookie.
        /// </remarks>
        private void SavePersistentValuesForTree(string xpath)
        {

            //create the output cookie with all of the values of the request cookie

            var newCookie = HttpContext.Current.Response.Cookies[MNTP_DataType.PersistenceCookieName] ?? new HttpCookie(MNTP_DataType.PersistenceCookieName);

            //store the xpath for this data type definition
            newCookie.MntpAddXPathFilter(this.DataTypeDefinitionId, xpath);
            //store the match type
            newCookie.MntpAddXPathFilterType(this.DataTypeDefinitionId, XPathFilterMatchType);
            //store the start node id
            newCookie.MntpAddStartNodeId(this.DataTypeDefinitionId, StartNodeId);
            //store the start node selection type
            newCookie.MntpAddStartNodeSelectionType(this.DataTypeDefinitionId, StartNodeSelectionType);
            //store the start node xpath expression type
            newCookie.MntpAddStartNodeXPathExpressionType(this.DataTypeDefinitionId, StartNodeXPathExpressionType);
            //store the start node xpath expression
            newCookie.MntpAddStartNodeXPathExpression(this.DataTypeDefinitionId, StartNodeXPathExpression);
            //store the current editing node if found
            if (!string.IsNullOrEmpty(HttpContext.Current.Request["id"]))
            {
                var id = 0;
                if (int.TryParse(HttpContext.Current.Request["id"], out id))
                {
                    newCookie.MntpAddCurrentEditingNode(this.DataTypeDefinitionId, id);
                }
            }

            HttpContext.Current.Response.Cookies.Add(newCookie);

            //add it to the request cookies too, thus overriding any old data
            if (HttpContext.Current.Request.Cookies[MNTP_DataType.PersistenceCookieName] != null && HttpContext.Current.Request.Cookies[MNTP_DataType.PersistenceCookieName].Values.Count > 0)
            {
                //remove the incoming one and replace with new one
                HttpContext.Current.Request.Cookies.Remove(MNTP_DataType.PersistenceCookieName);
            }
            HttpContext.Current.Request.Cookies.Add(newCookie);

        }

        /// <summary>
        /// A reference path to where the icons are actually stored as compared to where the tree themes folder is
        /// </summary>
        private static readonly string IconPath = IOHelper.ResolveUrl(SystemDirectories.Umbraco) + "/images/umbraco/";
    }
}