using Avalonia;
using Avalonia.Data.Converters;
using Shaker.Models;
using ShakerApp.Tools;
using ShakerApp.ViewModels;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;

namespace ShakerApp.Convert
{
    public class EnumToBooleanConverter : IValueConverter
    {
        public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
        {
            if(value is Enum e1 && parameter is Enum e2 && e1.GetType() == e2.GetType())
            {
                return e1.ToString() == e2.ToString();
            }
            return false;
        }

        public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
    public class EnumToDescription : IValueConverter
    {
        public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
        {
            if (value == null || value == AvaloniaProperty.UnsetValue || !value.GetType().IsEnum) return "";
            if( value is Enum e) return e.Description();
            return "";
        }

        public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

    public class EnumToCollectionConverter : IValueConverter
    {
        public static string Value { get; } = nameof(ValueDescription.Value);
        public static string Key { get; } = nameof(ValueDescription.Key);

        public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
        {
            if (value == null || value == AvaloniaProperty.UnsetValue || !value.GetType().IsEnum) return null;
            try
            {
                string parstr = (parameter ==null ?"":parameter.ToString())!;
                List<Enum> showValues = new List<Enum>();
                if (!string.IsNullOrEmpty(parstr)) showValues = parstr.Split(",".ToCharArray()).Select(x => (Enum)Enum.ToObject(value.GetType(), int.Parse(x))).ToList();
                List<ValueDescription> valueDescriptions = new List<ValueDescription>();
                Enum.GetValues(value.GetType())
                           .Cast<Enum>()
                           .ToList().ForEach(e =>
                           {
                               if (parameter != null && showValues.Count > 0)
                               {
                                   if (showValues.FindIndex(x => x.ToString() == e.ToString()) >= 0) valueDescriptions.Add(new ValueDescription() { Value = e, Key = e.Description() });
                               }
                               else valueDescriptions.Add(new ValueDescription() { Value = e, Key = e.Description() });
                           });
                return valueDescriptions;
            }
            catch { }
            return null;
        }

        public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
        {
            return null;
        }
    }

    internal class ValueDescription : DisplayViewModelBase<IModel>
    {
        private Enum? value;
        private string key = string.Empty;
        private bool visibility = true;
        private bool isEnabled = true;

        public ValueDescription()
        {
        }

        public Enum? Value { get => value; set => SetProperty(ref this.value, value); }
        public string Key { get => key; set => SetProperty(ref key, value); }

        public bool Visibility { get => visibility; set => SetProperty(ref visibility, value); }
        public bool IsEnabled { get => isEnabled; set => SetProperty(ref isEnabled, value); }

        public override string ToString()
        {
            return Key;
        }
    }
}