using System;
using System.Data.SqlClient;
using Dapper;

namespace DataModel.Process
{
    /// <summary>
    /// MIS data tracking functions for LotFinderDB interface
    /// </summary>
    public partial class LotFinderDB
    {
        /// <summary>
        /// Post-processing script to set obsoletion dates
        /// </summary>
        private const string SQL_POSTPROCESS_MISDATA = @"
            SET ANSI_WARNINGS OFF;

            WITH cte AS (
                          SELECT md.MisNumber, md.RevID, md.Status, MIN(md.ReleaseDate) Released
                          FROM dbo.MisData AS md
                          GROUP BY md.MisNumber, md.RevID, md.Status
                         )
            UPDATE  dbo.MisData
            SET     ObsoleteDate = bl.Released
            FROM    cte bl
            WHERE   MisData.MisNumber = bl.MisNumber AND
                    MisData.RevID = bl.RevID AND
                    MisData.Status = 'Current' AND
                    bl.Status = 'BackLevel';

            WITH cte AS (
                          SELECT md.MisNumber, md.RevID, md.Status, MIN(md.ReleaseDate) Released
                          FROM dbo.MisData AS md
                          GROUP BY md.MisNumber, md.RevID, md.Status
                         )
            UPDATE  dbo.MisData
            SET     ObsoleteDate = (SELECT TOP 1 nl.Released
                                    FROM    cte nl
                                    WHERE   MisData.MisNumber = nl.MisNumber AND
                                            MisData.RevID < nl.RevID AND
                                            MisData.Status = nl.Status
                                    ORDER BY nl.RevID) 
            WHERE ObsoleteDate IS NULL;
        
            ALTER INDEX [PK_MisData] ON [dbo].[MisData] REBUILD;";

        /// <summary>
        /// Performs post processing on imported Mis data
        /// </summary>
        public static void PostProcessMisData()
        {
            try
            {
                using (SqlConnection connection = GetConnection())
                {
                    connection.Execute(SQL_POSTPROCESS_MISDATA);
                }
            }
            catch (Exception error)
            {
                //Log and forward exception
                logger.Error("PostProcessMisData: failed to post process MIS data: {0}.", error.Message);
                throw new Exception($"Failed to post process MIS data from LotFinderDB.", error);
            }
        }
    }
}