using System;
using System.Text.Json;
using System.Text.Json.Serialization;

namespace gehGassi.Web.Helper
{
    public class DateTimeOffsetJsonConverter : JsonConverter<DateTimeOffset>
    {
        public override DateTimeOffset Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
        {
            return DateTimeOffset.Parse(reader.GetString());
        }

        public override void Write(Utf8JsonWriter writer, DateTimeOffset value, JsonSerializerOptions options)
        {
            writer.WriteStringValue(value.UtcDateTime.ToString("o"));
        }
    }

    public class NullableDateTimeOffsetJsonConverter : JsonConverter<DateTimeOffset?>
    {
        public override DateTimeOffset? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
        {
            var valueToParse = reader.GetString();
            if(!string.IsNullOrWhiteSpace(valueToParse))
                return DateTimeOffset.Parse(valueToParse);
            return null;
        }

        public override void Write(Utf8JsonWriter writer, DateTimeOffset? value, JsonSerializerOptions options)
        {
            if(value.HasValue)
                writer.WriteStringValue(value.Value.UtcDateTime.ToString("o"));
            writer.WriteStringValue(string.Empty);
        }
    }

    public class DateOnlyJsonConverter : JsonConverter<DateOnly>
    {
        public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
        {
            return DateOnly.Parse(reader.GetString());
        }

        public override void Write(Utf8JsonWriter writer, DateOnly value, JsonSerializerOptions options)
        {
            writer.WriteStringValue(value.ToString("o"));
        }
    }

    public class NullableDateOnlyJsonConverter : JsonConverter<DateOnly?>
    {
        public override DateOnly? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
        {
            var valueToParse = reader.GetString();
            if (!string.IsNullOrWhiteSpace(valueToParse))
                return DateOnly.Parse(valueToParse);
            return null;
        }

        public override void Write(Utf8JsonWriter writer, DateOnly? value, JsonSerializerOptions options)
        {
            if (value.HasValue)
                writer.WriteStringValue(value.Value.ToString("o"));
            writer.WriteStringValue(string.Empty);
        }
    }
}