using System;
using System.Collections.Generic;
using System.Data;
using System.Data.OleDb;
using System.Linq;
using System.Data.SqlClient;
using System.Xml;
using DTS.Common.Enums.DBExport;
using DTS.Common.Storage;
using DTS.Common.Utilities.Logging;

namespace DTS.Common.ISO
{
    /// <summary>
    /// a test object is a top level object in the ISO database
    /// given a test object, it is possible to find all possible channels as defined in ISO
    /// note there is a ? test object ...
    /// I'll use these to build templates
    /// </summary>
    public class MMETestObjects : AbstractOLEDbWrapper
    {
        public string S_GUID { get; }

        public string Test_Object { 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 static void WriteXML(ref XmlWriter writer, MMETestObjects[] testObjects)
        {
            writer.WriteStartElement(TopLevelFields.CustomTestObjects.ToString());

            foreach (var to in testObjects)
            {
                writer.Flush();
                to.WriteXML(ref writer);
                writer.Flush();
            }

            writer.WriteEndElement();
        }
        /// <summary>
        /// imports a singular transducer main location
        /// </summary>
        /// <param name="node"></param>
        /// <param name="setStatus"></param>
        /// <param name="page"></param>
        public static MMETestObjects ReadXML(XmlElement node)
        {
            var fields = Enum.GetValues(typeof(TestObjectFields)).Cast<TestObjectFields>().ToArray();

            string sGuid = "", sTestObject = "", textL1 = "", textL2 = "", remarks = "", sortkey = "", lastChangeText = "", history = "";
            long version = 0;
            var expired = false;
            DateTime date = DateTime.Now, lastChange = DateTime.Now;

            foreach (var field in fields)
            {
                switch (field)
                {
                    case TestObjectFields.DATE:
                        date = DateTime.Parse(node.GetAttribute(field.ToString()), System.Globalization.CultureInfo.InvariantCulture);
                        break;
                    case TestObjectFields.EXPIRED:
                        expired = Convert.ToBoolean(node.GetAttribute(field.ToString()));
                        break;
                    case TestObjectFields.HISTORY:
                        history = node.GetAttribute(field.ToString());
                        break;
                    case TestObjectFields.LAST_CHANGE:
                        lastChange = DateTime.Parse(node.GetAttribute(field.ToString()), System.Globalization.CultureInfo.InvariantCulture);
                        break;
                    case TestObjectFields.LAST_CHANGE_TEXT:
                        lastChangeText = node.GetAttribute(field.ToString());
                        break;
                    case TestObjectFields.REMARKS:
                        remarks = node.GetAttribute(field.ToString());
                        break;
                    case TestObjectFields.s_GUID:
                        sGuid = node.GetAttribute(field.ToString());
                        break;
                    case TestObjectFields.SORTKEY:
                        sortkey = node.GetAttribute(field.ToString());
                        break;
                    case TestObjectFields.TEST_OBJECT:
                        sTestObject = node.GetAttribute(field.ToString());
                        break;
                    case TestObjectFields.TEXT_L1:
                        textL1 = node.GetAttribute(field.ToString());
                        break;
                    case TestObjectFields.TEXT_L2:
                        textL2 = node.GetAttribute(field.ToString());
                        break;
                    case TestObjectFields.VERSION:
                        version = long.Parse(node.GetAttribute(field.ToString()), System.Globalization.CultureInfo.InvariantCulture);
                        break;
                    default:
                        throw new NotSupportedException("ImportTestSetup::ImportTestObject unsupported field: " + field.ToString());
                }
            }
            return new MMETestObjects(sGuid, sTestObject, textL1, textL2, version, date, remarks, expired, sortkey, lastChange, lastChangeText, history, MMEPossibleChannels.MMEChannelTypes.SQL);
        }
        /// <summary>
        /// writes an ISODll.MMETransducerMainLocation to xml
        /// </summary>
        /// <param name="m"></param>
        /// <param name="writer"></param>
        public void WriteXML(ref XmlWriter writer)
        {
            writer.WriteStartElement("TestObject");

            var fields = Enum.GetValues(typeof(TestObjectFields)).Cast<TestObjectFields>().ToArray();

            foreach (var field in fields)
            {
                var sVal = "";

                switch (field)
                {
                    case TestObjectFields.DATE: sVal = Date.ToString(System.Globalization.CultureInfo.InvariantCulture); break;
                    case TestObjectFields.EXPIRED: sVal = Expired.ToString(); break;
                    case TestObjectFields.HISTORY: sVal = History; break;
                    case TestObjectFields.LAST_CHANGE: sVal = Last_Change.ToString(System.Globalization.CultureInfo.InvariantCulture); break;
                    case TestObjectFields.LAST_CHANGE_TEXT: sVal = Last_Change_Text; break;
                    case TestObjectFields.REMARKS: sVal = Remarks; break;
                    case TestObjectFields.s_GUID: sVal = S_GUID; break;
                    case TestObjectFields.SORTKEY: sVal = SortKey; break;
                    case TestObjectFields.TEST_OBJECT: sVal = Test_Object; break;
                    case TestObjectFields.TEXT_L1: sVal = Text_L1; break;
                    case TestObjectFields.TEXT_L2: sVal = Text_L2; break;
                    case TestObjectFields.VERSION: sVal = Version.ToString(System.Globalization.CultureInfo.InvariantCulture); break;
                    default: throw new NotSupportedException("ExportTestSetup::WriteTestObject unsupported field: " + field);
                }

                writer.WriteAttributeString(field.ToString(), sVal);
            }

            writer.WriteEndElement();
        }

        public MMETestObjects(string textL1)
        {
            Text_L1 = textL1;
        }

        public MMETestObjects(string sGuid, string testObject, 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;
            Test_Object = testObject;
            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 void Commit()
        {
            using (var cmd = DbOperations.GetSQLCommand(true))
            {
                try
                {
                    cmd.CommandType = CommandType.StoredProcedure;
                    cmd.CommandText = DbOperationsEnum.StoredProcedure.sp_MMETestObjectsUpdateInsert.ToString();

                    #region params

                    cmd.Parameters.Add(
                        new SqlParameter("@s_GUID", SqlDbType.UniqueIdentifier) { Value = Guid.Parse(S_GUID) });
                    cmd.Parameters.Add(new SqlParameter("@TEST_OBJECT", SqlDbType.NVarChar, 50) { Value = Test_Object });
                    cmd.Parameters.Add(new SqlParameter("@TEXT_L1", SqlDbType.NVarChar, 50) { Value = Text_L1 });
                    cmd.Parameters.Add(new SqlParameter("@TEXT_L2", SqlDbType.NVarChar, 50) { Value = Text_L2 });
                    cmd.Parameters.Add(new SqlParameter("@VERSION", SqlDbType.Int) { Value = Version });
                    cmd.Parameters.Add(new SqlParameter("@DATE", SqlDbType.DateTime) { Value = Date });
                    cmd.Parameters.Add(new SqlParameter("@REMARKS", SqlDbType.NVarChar, 50) { Value = Remarks });
                    cmd.Parameters.Add(new SqlParameter("@EXPIRED", SqlDbType.Bit) { Value = Expired });
                    cmd.Parameters.Add(new SqlParameter("@SORTKEY", SqlDbType.NVarChar, 50) { Value = SortKey });
                    cmd.Parameters.Add(new SqlParameter("@LAST_CHANGE", SqlDbType.DateTime) { Value = Last_Change });
                    cmd.Parameters.Add(
                        new SqlParameter("@LAST_CHANGE_TEXT", SqlDbType.NVarChar, 50) { Value = Last_Change_Text });
                    cmd.Parameters.Add(new SqlParameter("@HISTORY", SqlDbType.NVarChar, 50) { Value = History });
                    var errorNumberParam =
                        new SqlParameter("@errorNumber", SqlDbType.Int) { Direction = ParameterDirection.Output };
                    cmd.Parameters.Add(errorNumberParam);
                    var errorMessageParam =
                        new SqlParameter("@errorMessage", SqlDbType.NVarChar, 250)
                        {
                            Direction = ParameterDirection.Output
                        };
                    cmd.Parameters.Add(errorMessageParam);

                    #endregion params

                    cmd.ExecuteNonQuery();
                    if (int.Parse(errorNumberParam.Value.ToString()) != 0)
                    {
                        //errorMessageParam.Value
                    }
                }
                finally
                {
                    cmd.Connection.Dispose();
                }
            }
        }

        public static MMETestObjects[] GetTestObjects()
        {
            var testObjects = new List<MMETestObjects>();
            using (var cmd = DbOperations.GetISOCommand())
            {
                cmd.CommandText = "SELECT * FROM MMETestObjects";
                cmd.CommandType = CommandType.Text;
                try
                {
                    using (var ISOReader = cmd.ExecuteReader())
                    {
                        while (ISOReader.Read())
                        {
                            try
                            {
                                string sGuid = ISOReader["s_GUID"].ToString();
                                string testObject = ISOReader["TEST_OBJECT"].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();
                                testObjects.Add(new MMETestObjects(sGuid, testObject, textL1, textL2, version, date,
                                    remarks, expired,
                                    sortkey, lastChange, lastChangeText, history,
                                    MMEPossibleChannels.MMEChannelTypes.ISO13499_106));
                            }
                            catch (Exception ex)
                            {
                                APILogger.Log("Failed to process test objects", ex);
                            }
                        }
                    }
                }
                finally
                {
                    cmd.Connection.Dispose();
                }
            }

            return testObjects.ToArray();
        }
    }
}