namespace BlogEngine.Core.DataStore

{

    using System;

    using System.Configuration;

    using System.IO;

    using System.Xml;

    using System.Xml.Serialization;



    using BlogEngine.Core.Providers;



    /// <summary>

    /// Class to encapsulate saving and retreaving 

    ///     XML documents to and from data storage

    /// </summary>

    public class XmlDocumentBehavior : ISettingsBehavior

    {

        #region Constants and Fields



        /// <summary>

        ///     The _section.

        /// </summary>

        private static readonly BlogProviderSection Section =

            (BlogProviderSection)ConfigurationManager.GetSection("BlogEngine/blogProvider");



        #endregion



        #region Implemented Interfaces



        #region ISettingsBehavior



        /// <summary>

        /// Gets settings from data store

        /// </summary>

        /// <param name="extensionType">

        /// Extension Type

        /// </param>

        /// <param name="extensionId">

        /// Extension ID

        /// </param>

        /// <returns>

        /// Settings as Stream

        /// </returns>

        public object GetSettings(ExtensionType extensionType, string extensionId)

        {

            WidgetData widgetData;

            var xml = new XmlDocument();



            if (Section.DefaultProvider == "XmlBlogProvider")

            {

                var stm = (Stream)BlogService.LoadFromDataStore(extensionType, extensionId);

                if (stm != null)

                {

                    var x = new XmlSerializer(typeof(XmlDocument));

                    xml = (XmlDocument)x.Deserialize(stm);

                    stm.Close();

                }

            }

            else

            {

                var o = BlogService.LoadFromDataStore(extensionType, extensionId);

                if (!string.IsNullOrEmpty((string)o))

                {

                    var serializer = new XmlSerializer(typeof(WidgetData));

                    using (var reader = new StringReader((string)o))

                    {

                        widgetData = (WidgetData)serializer.Deserialize(reader);

                    }



                    if (widgetData.Settings.Length > 0)

                    {

                        xml.InnerXml = widgetData.Settings;

                    }

                }

            }



            return xml;

        }



        /// <summary>

        /// Saves XML document to data storage

        /// </summary>

        /// <param name="extensionType">

        /// Extension Type

        /// </param>

        /// <param name="extensionId">

        /// Extension ID

        /// </param>

        /// <param name="settings">

        /// Settings as XML document

        /// </param>

        /// <returns>

        /// True if saved

        /// </returns>

        public bool SaveSettings(ExtensionType extensionType, string extensionId, object settings)

        {

            var xml = (XmlDocument)settings;



            if (Section.DefaultProvider == "XmlBlogProvider")

            {

                BlogService.SaveToDataStore(extensionType, extensionId, xml);

            }

            else

            {

                var wd = new WidgetData { Settings = xml.InnerXml };

                BlogService.SaveToDataStore(extensionType, extensionId, wd);

            }



            return true;

        }



        #endregion



        #endregion

    }



    /// <summary>

    /// Wrap around xml document

    /// </summary>

    [Serializable]

    public class WidgetData

    {

        #region Constructors and Destructors



        /// <summary>

        ///     Initializes a new instance of the <see cref = "WidgetData" /> class.

        /// </summary>

        public WidgetData()

        {

            this.Settings = string.Empty;

        }



        #endregion



        #region Properties



        /// <summary>

        ///     Gets or sets the settings.

        /// </summary>

        /// <value>The settings.</value>

        public string Settings { get; set; }



        #endregion

    }

}