using System;
using System.Collections.Generic;
using System.Windows;

namespace DatabaseImport
{
    /// <summary>
    /// a custom channel is a wrapper for MMEPossibleChannels that are defined by the user rather than ISO13499
    /// they have mirror tables to the actual db and let us define new channels without disrupting the existing 1so13499 db
    /// </summary>
    public class CustomChannel : /*BasePropertyChanged,*/ IComparable<CustomChannel>
    {

        //        #region Properties
        public MMEPossibleChannels Channel { get; private set; }
        private MMETestObjects _testObject;
        private MMEPositions _position;
        private MMETransducerMainLocation _mainLocation;
        private MMEFineLocations1 _finLoc1;
        private MMEFineLocations2 _finLoc2;
        private MMEFineLocations3 _finLoc3;
        private MMEPhysicalDimensions _physicalDimension;
        private MMEDirections _direction;
        private MMEFilterClasses _filterClass;
        public string Text1
        {
            get => Channel.Text_L1;
            set => Channel.SetText1(value);
        }
        private readonly List<ISO13499FileDb.ExpiredISOFieldException> _expiredErrors = new List<ISO13499FileDb.ExpiredISOFieldException>();
        public CustomChannel(MMEPossibleChannels channel, bool newChannel = true)
        {
            Channel = newChannel ? new MMEPossibleChannels(channel) : channel;

            _direction = ((App)Application.Current).IsoDb.GetDirectionByIso(channel.Direction);
            _filterClass = ((App)Application.Current).IsoDb.GetFilterClassByIso(channel.Default_Filter_Class);
            _finLoc1 = ((App)Application.Current).IsoDb.GetFineLocation1ByIso(channel.Fine_Loc_1);
            _finLoc2 = ((App)Application.Current).IsoDb.GetFineLocation2ByIso(channel.Fine_Loc_2);
            _finLoc3 = ((App)Application.Current).IsoDb.GetFineLocation3ByIso(channel.Fine_Loc_3);

            try { _mainLocation = ((App)Application.Current).IsoDb.GetMainLocationByIso(channel.Trans_Main_Loc); }
            catch (ISO13499FileDb.ExpiredISOFieldException ex) { _expiredErrors.Add(ex); }

            _physicalDimension = ((App)Application.Current).IsoDb.GetPhysicalDimensionByIso(channel.Physical_Dimension);
            _position = ((App)Application.Current).IsoDb.GetPositionByISO(channel.Position);
            _testObject = ((App)Application.Current).IsoDb.GetTestObjectByIso(channel.Test_Object);
        }
        public int CompareTo(CustomChannel other)
        {
            return Equals(this, other) ? 0 : string.Compare(Text1, other.Text1, StringComparison.Ordinal);
        }
    }
    public class CustomChannelList //: BasePropertyChanged
    {
        private static readonly object LockObject = new object();
        private static CustomChannelList _list;
        public static CustomChannelList List
        {
            get
            {
                lock (LockObject)
                {
                    if (null == _list)
                    {
                        _list = new CustomChannelList();
                    }
                }
                return _list;
            }
        }

        public void ReloadAll()
        {
            lock (LockObject)
            {
                List._listChannels = null;
                var app = Application.Current as App;
                if (app == null) { return; }
                app.IsoDb.RefreshAllData();
                List.PopulateChannelsIfNecessary();
            }
        }
        private Dictionary<string, CustomChannel> _dictChannels;
        private List<CustomChannel> _listChannels;
        private void PopulateChannelsIfNecessary()
        {
            lock (LockObject)
            {
                if (null != _listChannels) return;
                _listChannels = new List<CustomChannel>();
                _dictChannels = new Dictionary<string, CustomChannel>();
                foreach (var channel in ((App)Application.Current).IsoDb.GetSQLPossibleChannels())
                {
                    var ch = new CustomChannel(channel);
                    var iso = ISO.IsoCode.GetString(ch.Channel, false);
                    if (_dictChannels.ContainsKey(iso)) continue;
                    _listChannels.Add(ch);
                    _dictChannels[iso] = ch;
                }
                _listChannels.Sort();
            }
        }
        private static ISO13499FileDb _isoDb;
        public ISO13499FileDb IsoDb
        {
            get
            {
                if (null != _isoDb) return _isoDb;
                _isoDb = new ISO13499FileDb();
                _isoDb.RefreshAllData();
                return _isoDb;
            }
        }
        /// <summary>
        /// deletes all customchannels
        /// originally created so TDM imports could clear all tables except DAS tables
        /// </summary>
        public void DeleteAll()
        {
            lock (LockObject)
            {
                _listChannels = null;
                _dictChannels = null;
                //((App)Application.Current).IsoDb.DeleteSQL();
                IsoDb.DeleteSQL();
                //OnPropertyChanged("AllChannels");
            }
        }
    }
}