using System;
using System.ComponentModel;
using System.Globalization;

namespace Timeline.Models.Converters
{
    public class MyDateTimeConverter : TypeConverter
    {
        public override bool CanConvertFrom(ITypeDescriptorContext? context, Type sourceType)
        {
            return sourceType == typeof(string) || base.CanConvertFrom(context, sourceType);
        }

        public override bool CanConvertTo(ITypeDescriptorContext? context, Type? destinationType)
        {
            return base.CanConvertTo(context, destinationType);
        }

        public override object? ConvertFrom(ITypeDescriptorContext? context, CultureInfo? culture, object value)
        {
            if (value is string text)
            {
                text = text.Trim();
                if (text.Length == 0)
                {
                    return DateTime.SpecifyKind(DateTime.MinValue, DateTimeKind.Utc);
                }

                return DateTime.Parse(text, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal);
            }

            return base.ConvertFrom(context, culture, value);
        }

        public override object? ConvertTo(ITypeDescriptorContext? context, CultureInfo? culture, object? value, Type destinationType)
        {
            if (destinationType == typeof(string) && value is DateTime)
            {
                DateTime dt = (DateTime)value;
                if (dt == DateTime.MinValue)
                {
                    return string.Empty;
                }

                return dt.ToString("s", CultureInfo.InvariantCulture) + "Z";
            }

            return base.ConvertTo(context, culture, value, destinationType);
        }
    }
}