using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Data.OleDb;

namespace DatabaseExport
{
    public class MMEPositions : AbstractOLEDbWrapper
    {
        public string S_GUID { get; }

        public string Position { get; }

        public string Text_L1 { get; }

        public string Text_L2 { get; }

        public long Version { get; }

        public DateTime Date { get; }

        public string Remarks { get; }

        public bool Expired { get; }

        public string SortKey { get; }

        public DateTime Last_Change { get; }

        public string Last_Change_Text { get; }

        public string History { get; }

        public MMEPossibleChannels.MMEChannelTypes RecordType { get; } = MMEPossibleChannels.MMEChannelTypes.ISO13499_106;

        public MMEPositions(string sGuid, string position, string textL1, string textL2, long version,
            DateTime date, string remarks, bool expired, string sortKey, DateTime lastChange, string lastChangeText,
            string history, MMEPossibleChannels.MMEChannelTypes type)
        {
            RecordType = type;
            S_GUID = sGuid;
            Position = position;
            Text_L1 = textL1;
            Text_L2 = textL2;
            Version = version;
            Date = date;
            Remarks = remarks;
            Expired = expired;
            SortKey = sortKey;
            Last_Change = lastChange;
            Last_Change_Text = lastChangeText;
            History = history;
        }
        public static MMEPositions[] GetPositions()
        {
            var positions = new List<MMEPositions>();
            try
            {
                using (var cmd = DbOperations.GetISOCommand())
                {
                    cmd.CommandText = "SELECT * FROM MMEPositions";
                    cmd.CommandType = CommandType.Text;
                    try
                    {
                        using (var ISOReader = cmd.ExecuteReader())
                        {
                            while (ISOReader.Read())
                            {
                                try
                                {
                                    string sGuid = ISOReader["s_GUID"].ToString();
                                    string position = ISOReader["POSITION"].ToString();
                                    string textL1 = ISOReader["TEXT_L1"].ToString();
                                    string textL2 = ISOReader["TEXT_L2"].ToString();
                                    long version = GetLong(ISOReader, "VERSION");
                                    DateTime date = (DateTime)ISOReader["DATE"];
                                    string remarks = ISOReader["REMARKS"].ToString();
                                    bool expired = (bool)ISOReader["EXPIRED"];
                                    string sortkey = ISOReader["SORTKEY"].ToString();
                                    DateTime lastChange = GetDate(ISOReader, "LAST_CHANGE");
                                    string lastChangeText = ISOReader["LAST_CHANGE_TEXT"].ToString();
                                    string history = ISOReader["HISTORY"].ToString();
                                    positions.Add(new MMEPositions(sGuid, position, textL1, textL2, version, date, remarks, expired, sortkey, lastChange, lastChangeText, history, MMEPossibleChannels.MMEChannelTypes.ISO13499_106));
                                }
                                catch (Exception)
                                {
                                    //ignore
                                }
                            }
                        }
                    }
                    finally
                    {
                        cmd.Connection.Dispose();
                    }
                }
                try
                {
                    using (var cmd = DbOperations.GetCommand())
                    {
                        try
                        {
                            cmd.CommandText = string.Format("SELECT * FROM {0}", DbOperations.MMETables.MMEPositionsTable);
                            using (var ds = DbOperations.Connection.QueryDataSet(cmd))
                            {
                                if (ds.Tables.Count > 0 && ds.Tables[0].Rows.Count > 0)
                                {
                                    var fields = Enum.GetValues(typeof(DbOperations.MMETables.MMEPositionsFields))
                                        .Cast<DbOperations.MMETables.MMEPositionsFields>().ToArray();
                                    foreach (System.Data.DataRow dr in ds.Tables[0].Rows)
                                    {
                                        var version = 0;
                                        var text2 = "";
                                        var text1 = "";
                                        var sortKey = "";
                                        var sGuid = "";
                                        var remarks = "";
                                        var position = "?";
                                        var lastChangeText = "";
                                        var lastChange = DateTime.Now;
                                        var history = "";
                                        var expired = false;
                                        var date = DateTime.Now;

                                        foreach (var field in fields)
                                        {
                                            try
                                            {
                                                if (DBNull.Value.Equals(dr[field.ToString()])) { continue; }

                                                var o = dr[field.ToString()];

                                                switch (field)
                                                {
                                                    case DbOperations.MMETables.MMEPositionsFields.DATE:
                                                        date = Convert.ToDateTime(o);
                                                        break;
                                                    case DbOperations.MMETables.MMEPositionsFields.EXPIRED:
                                                        expired = Convert.ToBoolean(o);
                                                        break;
                                                    case DbOperations.MMETables.MMEPositionsFields.HISTORY:
                                                        history = Convert.ToString(o);
                                                        break;
                                                    case DbOperations.MMETables.MMEPositionsFields.LAST_CHANGE:
                                                        lastChange = Convert.ToDateTime(o);
                                                        break;
                                                    case DbOperations.MMETables.MMEPositionsFields.LAST_CHANGE_TEXT:
                                                        lastChangeText = Convert.ToString(o);
                                                        break;
                                                    case DbOperations.MMETables.MMEPositionsFields.POSITION:
                                                        position = Convert.ToString(o);
                                                        break;
                                                    case DbOperations.MMETables.MMEPositionsFields.REMARKS:
                                                        remarks = Convert.ToString(o);
                                                        break;
                                                    case DbOperations.MMETables.MMEPositionsFields.s_GUID:
                                                        sGuid = Convert.ToString(o);
                                                        break;
                                                    case DbOperations.MMETables.MMEPositionsFields.SORTKEY:
                                                        sortKey = Convert.ToString(o);
                                                        break;
                                                    case DbOperations.MMETables.MMEPositionsFields.TEXT_L1:
                                                        text1 = Convert.ToString(o);
                                                        break;
                                                    case DbOperations.MMETables.MMEPositionsFields.TEXT_L2:
                                                        text2 = Convert.ToString(o);
                                                        break;
                                                    case DbOperations.MMETables.MMEPositionsFields.VERSION:
                                                        version = Convert.ToInt32(o);
                                                        break;
                                                }
                                            }
                                            catch (Exception) 
                                            {
                                                //ignore
                                            }
                                        }
                                        positions.Add(new MMEPositions(sGuid.ToString(), position, text1, text2, Convert.ToInt64(version), date, remarks, expired,
                                            sortKey, lastChange, lastChangeText, history, MMEPossibleChannels.MMEChannelTypes.SQL));
                                    }
                                }
                            }
                        }
                        finally
                        {
                            cmd.Connection.Dispose();
                        }
                    }
                }
                catch (Exception) 
                {
                    //ignore
                }
            }
            catch (Exception)
            {
                //ignore
            }
            return positions.ToArray();
        }
    }
}