using System;
using System.Data;
using System.Configuration;
using System.Web;

using DS.ImageCache;

// TODO: Change the line below to match the namespace of the imported XMLWrapper proxy stub.
// This version is using the generated proxy stub in Reference.cs
using DS.WebServices.Calm.XMLWrapper;

namespace DS.Examples.XMLWrapper
{
    public class BrokerImageCache : DS.ImageCache.ImageCache
    {
        private string database;

        private ContentService webService;
        private static ImageCacheSettingsManager settingsManager = new ImageCacheSettingsManager();

        public BrokerImageCache(string configurationFolder, string path, ImageCacheSettings settings, string subCategory, string database, ContentService webService)
            : base(configurationFolder, path, settings, subCategory)
        {
            this.database = database;
            this.webService = webService;
        }

        public static ImageCacheSettingsManager SettingsManager
        {
            get
            {
                return settingsManager;
            }
        }

        public override ImageCacheItem GetImage(string id, object oldCookie, bool newImage, int page)
        {
            UInt32 oldCrc = 0;
            if (oldCookie != null)
            {
                oldCrc = (UInt32)oldCookie;
            }
            CachedImage img = webService.GetCachedImage(database, id, oldCrc, newImage);

            if (img.Error != null && img.Error.Length > 0 )
            {
                // Function has returned an error. Throw an exception.
                throw new Exception(img.Error);
            }

            if (newImage || img.Crc == 0 || img.Crc != oldCrc)
            {
                // New item has been loaded. Return it.
                ImageCacheItem item = new ImageCacheItem(id, img.Crc, img.Data, img.MimeType);
                return item;
            }
            return null;
        }

        public override string ToString()
        {
            return database + " - " + base.ToString();
        }

    }
}