using System;
using System.Collections.Generic;
using Microsoft.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Transactions;

namespace bnhtrade.Core.Test
{
    public class SQLLoop
    {
        public void Go(string sqlConnectionString)
        {
            using (TransactionScope scope = new TransactionScope())
            {
                using (SqlConnection conn = new SqlConnection(sqlConnectionString))
                {
                    UI.Console.WriteLine("Starting.....");
                    conn.Open();

                    int count = 0;
                    int total;

                    using (SqlCommand cmd = new SqlCommand(@"
                        SELECT COUNT(StockJournalID)
                        FROM tblStockJournal
                        ", conn))
                    {
                        total = (int)cmd.ExecuteScalar();
                    }

                    var progress = new UI.ConsoleProgressBar(total, "Processing " + total + " records...");

                    using (SqlCommand cmd = new SqlCommand(@"
                            SELECT * FROM tblStockJournal
                            ", conn))
                    {
                        using (SqlDataReader reader = cmd.ExecuteReader())
                        {
                            while (reader.Read())
                            {
                                count = count + 1;
                                //progress.Report(2677);
                                progress.Report(count);

                                int journalId = reader.GetInt32(0);
                                DateTime entryDate = DateTime.SpecifyKind(reader.GetDateTime(3), DateTimeKind.Utc);
                                DateTime modifiedDate = DateTime.SpecifyKind(reader.GetDateTime(5), DateTimeKind.Utc);
                                DateTime postDate = entryDate;
                                DateTime minPostDate = DateTime.SpecifyKind(new DateTime(2015, 06, 24), DateTimeKind.Utc);

                                if (modifiedDate < entryDate)
                                { postDate = entryDate; }
                                if (postDate < minPostDate)
                                { postDate = minPostDate; }

                                using (
                                    SqlCommand updateCmd = new SqlCommand(@"
                                    UPDATE tblStockJournal
                                    SET PostDate = @postDate
                                    WHERE StockJournalID = @journalId;
                                    ", conn))
                                {
                                    updateCmd.Parameters.AddWithValue("@journalId", journalId);
                                    updateCmd.Parameters.AddWithValue("@postDate", postDate.ToUniversalTime());

                                    updateCmd.ExecuteNonQuery();

                                }
                            }
                        }
                    }
                    progress.Dispose();
                    scope.Complete();
                }
            }
        }
    }
}