using Microsoft.SharePoint.Utilities;
using Microsoft.SharePoint.WebControls;
using SPSolutions.Web;
using System;
using System.Globalization;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace SPSolutions.SharePoint.WebControls
{
    public abstract class SelectorEntityEditorAdapter<T> : ContextSelector<T>, IPostBackEventHandler
    {
        private static readonly string SelectedCommand = "selected";
        private HiddenField HiddenSelectedId;
        public event EventHandler Selected;
        //{
        //    [MethodImpl(MethodImplOptions.Synchronized)]
        //    add
        //    {
        //        this.Selected += value;// (EventHandler)Delegate.Combine(this.Selected, value);

        //        //this.Selected += SelectorEntityEditorAdapter_Selected;

        //    }
        //    [MethodImpl(MethodImplOptions.Synchronized)]
        //    remove
        //    {
        //        this.Selected -= value;
        //        //this.Selected += (EventHandler)Delegate.Remove(this.Selected, value);
        //    }
        //}

        void SelectorEntityEditorAdapter_Selected(object sender, EventArgs e)
        {
            throw new NotImplementedException();
        }
        public abstract Type PickerDialogType
        {
            get;
        }
        public string SelectedId
        {
            get
            {
                return this.HiddenSelectedId.Value;
            }
        }
        public bool UseCookieInitialization
        {
            get
            {
                return this.ViewState["Microsoft.SharePoint.SPAlertTemplate"] == null || (bool)this.ViewState["Microsoft.SharePoint.SPAlertTemplate"];
            }
            set
            {
                this.ViewState["Microsoft.SharePoint.SPAlertTemplate"] = value;
            }
        }
        internal static string CookieCurrentId
        {
            get
            {
                PropertyInfo property = typeof(ContextSelector<T>).GetProperty("CookieCurrentId", BindingFlags.Static | BindingFlags.NonPublic);
                return (string)property.GetValue(null, null);
            }
            set
            {
                PropertyInfo property = typeof(ContextSelector<T>).GetProperty("CookieCurrentId", BindingFlags.Static | BindingFlags.NonPublic);
                property.SetValue(null, value, null);
            }
        }
        protected override string NavigateUrl
        {
            get
            {
                return string.Format("/_layouts/15/picker.aspx?PickerDialogType={0}", HttpUtility.UrlEncode(this.PickerDialogType.AssemblyQualifiedName));
            }
        }
        protected override void CreateChildControls()
        {
            this.HiddenSelectedId = new HiddenField();
            this.HiddenSelectedId.ID = "HiddenSelectedId";
            this.Controls.Add(this.HiddenSelectedId);
            base.CreateChildControls();
        }
        protected override void RenderContents(HtmlTextWriter output)
        {
            this.HiddenSelectedId.RenderControl(output);
            base.RenderContents(output);
        }
        protected override void OnPreRender(EventArgs e)
        {
            base.OnPreRender(e);
            if (base.AllowChange)
            {
                var text1 = "SelectContext_" + this.ID;
                string text = "CallbackWrapper_" + this.ID;
                string postBackEventReference = this.Page.ClientScript.GetPostBackEventReference(this, SelectorEntityEditorAdapter<T>.SelectedCommand);
                string text2;
                if (base.CurrentItem == null)
                {
                    text2 = this.NavigateUrl;
                }
                else
                {
                    text2 = HttpUtil.AppendUrlQueryString(this.NavigateUrl, string.Format("{0}={1}", this.Key, base.CurrentId));
                }
                string script = string.Concat(new string[]
				{
					"<script language='javascript'>\r\nfunction ",
					text,
					"(xml)\r\n{\r\nvar xmlDoc;\r\nif(xml==null)\r\nreturn;\r\nif(document.implementation && document.implementation.createDocument)\r\n{\r\nxmlDoc=(new DOMParser()).parseFromString(xml, \"text/xml\");\r\n}\r\nelse\r\n{\r\nxmlDoc=new ActiveXObject(\"Microsoft.XMLDOM\");\r\nxmlDoc.async=false;\r\nxmlDoc.loadXML(xml);\r\n}\r\nvar entities=xmlDoc.documentElement;\r\nif(entities.childNodes.length == 0)\r\nreturn;\r\nvar entity = entities.childNodes[0];\r\nvar hiddenSelectedId = document.getElementById('",
					this.HiddenSelectedId.ClientID,
					"');\r\nhiddenSelectedId.value = entity.getAttribute(\"Key\");\r\n",
					postBackEventReference,
					";\r\n}\r\n</script>"
				});
                this.Page.ClientScript.RegisterClientScriptBlock(typeof(ContextSelectorEntityEditorAdapter<T>), text, script);
                string text3 = string.Format(CultureInfo.InvariantCulture, "commonShowModalDialog('{0}','resizable: yes; status: no; scroll: no; help: no; center: yes; dialogWidth : {1}pt; dialogHeight : {2}pt;',{3});", new object[]
				{
					SPHttpUtility.EcmaScriptStringLiteralEncode(text2),
					base.DialogWidth,
					base.DialogHeight,
					SPHttpUtility.EcmaScriptStringLiteralEncode(text)
				});
                this.ChangeItem.ClientOnClickScript = (SPHttpUtility.NoEncode(text3));
                PickerDialog.RegisterPickerReturnValueHiddenFields(this.Page);
            }
        }
        protected override void OnLoad(EventArgs e)
        {
            if (!this.Page.IsPostBack)
            {
                if (base.CurrentItem != null)
                {
                    T currentItem = base.CurrentItem;
                    if (!currentItem.Equals(default(T)))
                    {
                        return;
                    }
                }
                string idFromQueryString = this.IdFromQueryString;
                if (idFromQueryString == null)
                {
                    if (string.IsNullOrEmpty(base.ClearSelectionText))
                    {
                        if (this.UseCookieInitialization)
                        {
                            base.CurrentId = (SelectorEntityEditorAdapter<T>.CookieCurrentId);
                            return;
                        }
                        if (base.CurrentItem != null)
                        {
                            T currentItem2 = base.CurrentItem;
                            if (!currentItem2.Equals(default(T)))
                            {
                                return;
                            }
                        }
                        base.CurrentId = (this.DefaultSelectionId());
                        return;
                    }
                }
                else
                {
                    base.CurrentId = idFromQueryString;
                }
            }
        }
        public void RaisePostBackEvent(string eventArgument)
        {
            if (eventArgument == null)
            {
                throw new ArgumentNullException("eventArgument");
            }
            string a = eventArgument.ToLower(CultureInfo.InvariantCulture);
            if (a == SelectorEntityEditorAdapter<T>.SelectedCommand)
            {
                this.OnSelected(new EventArgs());
            }
        }
        protected virtual void OnSelected(EventArgs e)
        {
            base.CurrentId = (this.SelectedId);
            if (this.Selected != null)
            {
                this.Selected(this, e);
            }
        }
    }
}