using System;
using System.Data;
using CSLA.Data;
using GZTW.Data;
using CSLA;
using System.Threading;
using CSLA.Security;
using System.ComponentModel;



namespace GZTW.AyaNova.BLL
{
    //case 73
    /// <summary>
    ///Retrieves stats about files stored
    ///in the AyaNova database for diagnosis and administrative purposes
    /// </summary>
    [Serializable]
    public class AyaFileStats : ReadOnlyBase
    {

        #region Attributes
        private decimal mFileCount;
        private decimal mTotalStoredFileData;
        private decimal mTotalFileSize;

        /// <summary>
        /// Number of files stored in database
        /// </summary>
        public decimal FileCount
        { get { return mFileCount; } }

        /// <summary>
        /// Total bytes actually stored in database for files
        /// </summary>
        public decimal TotalStoredFileData
        { get { return mTotalStoredFileData; } }

        /// <summary>
        /// Total size of all files stored in the database if they were uncompressed
        /// </summary>
        public decimal TotalFileSize
        { get { return mTotalFileSize; } }

        /// <summary>
        /// Stats formatted in one UI friendly string for direct display
        /// </summary>
        public string Stats
        {
            //All stats formatted into one neat string
            get
            {
                return "AyaFile stats - Files: " + mFileCount.ToString() + " Total stored file data: " + AyaBizUtils.FileSizeDisplay(mTotalStoredFileData); 
            }

        }

        #endregion

        #region Constructor

        /// <summary>
        /// Private constructor to prevent direct instantiation
        /// </summary>
        private AyaFileStats()
        {

        }
        #endregion


        #region Static methods



        /// <summary>
        /// Fetch
        /// </summary>
        /// <returns></returns>
        public static AyaFileStats GetStats()
        {

            return (AyaFileStats)DataPortal.Fetch(new Criteria());

        }


        #endregion

        #region DAL DATA ACCESS
        /// 
        /// <param Bool="Criteria"></param>
        protected override void DataPortal_Fetch(object Criteria)
        {
            //case 963 improved null handling
          
          //case 1980 - arithmetic overflow bug

            if (DBUtil.DB.DBType == DataBaseType.FireBird)
            {
                mTotalStoredFileData = DBUtil.ScalarToDecimal(DBUtil.GetScalarFromSQLString("SELECT SUM(AFOBJECTSIZE) FROM AFILE"));
                mTotalFileSize = DBUtil.ScalarToDecimal(DBUtil.GetScalarFromSQLString("SELECT SUM(AFILESIZE) FROM AFILE"));
                mFileCount = DBUtil.ScalarToDecimal(DBUtil.GetScalarFromSQLString("SELECT COUNT(*) FROM AFILE"));      
            }
            else
            {
                mTotalStoredFileData = DBUtil.ScalarToDecimal(DBUtil.GetScalarFromSQLString("SELECT SUM(CAST(AFOBJECTSIZE AS BIGINT)) FROM AFILE"));
                mTotalFileSize = DBUtil.ScalarToDecimal(DBUtil.GetScalarFromSQLString("SELECT SUM(CAST(AFILESIZE AS BIGINT)) FROM AFILE"));
                mFileCount = DBUtil.ScalarToDecimal(DBUtil.GetScalarFromSQLString("SELECT COUNT(*) FROM AFILE"));      
            }                  

        }



        #endregion

        #region criteria
        /// <summary>
        /// Criteria for identifying existing object
        /// </summary>
        [Serializable]
        private class Criteria
        {

           // public Guid ID;
           // public string Name;
            public Criteria(/*Guid _ID, string _Name*/)
            {
                //ID = _ID;
               // Name = _Name;

            }

        }
        #endregion

    }//end class

}//end namespace GZTW.AyaNova.BLL