using System;
using System.Collections.Generic;
using System.Data;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using DTS.Common.Base;
using DTS.Common.Controls;
using DTS.Common.Enums;
using DTS.Common.Enums.Channels;
using DTS.Common.Events;
using DTS.Common.Interface.Channels.ChannelCodes;
using Prism.Events;
using Prism.Ioc;

namespace DTS.Common.Classes.ChannelCodes
{
    public class ChannelCode : BasePropertyChanged, IChannelCode
    {
        //in case this object is held longer before cleanup, make sure code and name are emptied
        ~ChannelCode()
        {
            _code = null;
            _name = null;
        }
        private int _id = -1;
        public int Id
        {
            get => _id;
            set => SetProperty(ref _id, value, "Id");
        }
        private UIItemStatus _itemStatus = UIItemStatus.None;
        public UIItemStatus ItemStatus
        {
            get => _itemStatus;
            set => SetProperty(ref _itemStatus, value, "ItemStatus");
        }

        protected string _code = string.Empty;
        public string Code
        {
            get => _code;
            set => SetProperty(ref _code, value, "Code");
        }

        protected string _name = string.Empty;
        public string Name
        {
            get => _name;
            set => SetProperty(ref _name, value, "Name");
        }

        public ChannelEnumsAndConstants.ChannelCodeType CodeType { get; set; }
        public const string PASTE_ID = "ChannelCode";
        // putting a null here avoids wasteful exception that was being thrown during UI construction
        // DTM 2020-12-07
        public ICommand PasteCommand { get; set; } = null;

        public ChannelCode(IDataReader reader, IReadOnlyDictionary<short, string> channelTypeLookup)
        {
            var codeType = ChannelEnumsAndConstants.ChannelCodeType.User;
            var iCodeType = Utility.GetShort(reader, "CodeTypeInt");
            if (channelTypeLookup.ContainsKey(iCodeType))
            {
                var key = channelTypeLookup[iCodeType];
                switch (key)
                {
                    case ChannelEnumsAndConstants.UserCodeTypeString:
                        codeType = ChannelEnumsAndConstants.ChannelCodeType.User;
                        break;
                    case ChannelEnumsAndConstants.IsoCodeTypeString:
                        codeType = ChannelEnumsAndConstants.ChannelCodeType.ISO;
                        break;
                }
            }
            Id = Utility.GetInt(reader, "Id");
            Code = Utility.GetString(reader, "Code");
            Name = Utility.GetString(reader, "Name");
            CodeType = codeType;
        }
        public ChannelCode()
        {
            CodeType = ChannelEnumsAndConstants.ChannelCodeType.ISO;
        }
        public ChannelCode(IChannelCode channelCode)
        {
            Id = channelCode.Id;
            Code = channelCode.Code;
            CodeType = channelCode.CodeType;
            Name = channelCode.Name;
        }
        public override bool Equals(object obj)
        {
            if (!(obj is ChannelCode other))
            {
                return false;
            }
            return Code.Equals(other.Code)
                && Name.Equals(other.Name)
                && CodeType.Equals(other.CodeType);
        }
    }

    public class PasteCommandClass : ICommand
    {
        public string Id { get; }
        public bool CanExecute(object parameter)
        {
            return true;
        }

        public void Execute(object parameter)
        {
            var eventAggregator = ContainerLocator.Container.Resolve<IEventAggregator>();
            try
            {
                if (!(parameter is TextBox tb))
                {
                    return;
                }


                if (!(tb.DataContext is IChannelCode channelCode))
                {
                    if (tb.DataContext is ChannelCodeBuilder ccb)
                    {
                        channelCode = ccb.DataContext as IChannelCode;
                    }
                    else if (tb.DataContext is ChannelNameBuilder cnb)
                    {
                        channelCode = cnb.DataContext as IChannelCode;
                    }
                    else
                    {
                        return;
                    }
                }

                if (!Clipboard.ContainsText())
                {
                    return;
                }

                var text = Clipboard.GetText();
                var lines = text.Split(new[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries);
                if (1 == lines.Length)
                {
                    var line = lines[0];
                    if (line.IndexOfAny(new[] { ',', ';', '\t' }) < 0)
                    {
                        //this is a single field paste, don't do any further processing, let textchanged take care of it

                        eventAggregator.GetEvent<PageModifiedEvent>().Publish(new PageModifiedArg(PageModifiedArg.Status.Modified, null));
                        return;
                    }
                }

                //wipe out the built in effect of the paste
                channelCode.Code = channelCode.Code;
                channelCode.Name = channelCode.Name;

                eventAggregator.GetEvent<TextPastedEvent>().Publish(new TextPastedArgs(text, channelCode, Id, tb.Tag));
            }
            catch (Exception ex)
            {
                eventAggregator.GetEvent<PageErrorEvent>().Publish(new PageErrorArg(new[] { ex.Message }, null));
            }
        }

        public event EventHandler CanExecuteChanged;

        public PasteCommandClass(string id)
        {
            Id = id;
        }
    }
    /// <summary>
    /// this defines a function to control the behavior of setting an isocode
    /// it was done for
    /// 14033 finish/clean up from removing CFC filter from digital input on sensor db
    /// this allows channels to handle incoming isocodes from the UI and coerce them to a new value
    /// </summary>
    /// <param name="val"></param>
    /// <param name="uniqueISOCodesRequired"></param>
    /// <param name="useISOCodeFilterMapping"></param>
    /// <returns></returns>
    public delegate string CoerceISOCodeDelegate(string val, bool uniqueISOCodesRequired, bool useISOCodeFilterMapping);
}