using Sandbox.Internal;

namespace ShaderGraphPlus.Internal.JsonConvert
{
	internal class Matrix2x2Converter : JsonConverter<Float2x2>
	{
		public override Float2x2 Read( ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options )
		{
			if ( reader.TokenType == JsonTokenType.String )
			{
				return Float2x2.Parse( reader.GetString() );
			}

			if ( reader.TokenType == JsonTokenType.StartArray )
			{
				reader.Read();
				Float2x2 result = default( Float2x2 );


				// Row 1
				if ( reader.TokenType == JsonTokenType.Number )
				{
					result.M11 = reader.GetSingle();
					reader.Read();
				}
				if ( reader.TokenType == JsonTokenType.Number )
				{
					result.M12 = reader.GetSingle();
					reader.Read();
				}

				// Row 2
				if ( reader.TokenType == JsonTokenType.Number )
				{
					result.M21 = reader.GetSingle();
					reader.Read();
				}
				if ( reader.TokenType == JsonTokenType.Number )
				{
					result.M22 = reader.GetSingle();
					reader.Read();
				}

				while ( reader.TokenType != JsonTokenType.EndArray )
				{
					reader.Read();
				}

				return result;

			}

			Log.Warning( $"Float2x2FromJson - unable to read from {reader.TokenType}" );
			return default;
		}

		public override void Write( Utf8JsonWriter writer, Float2x2 val, JsonSerializerOptions options )
		{
			writer.WriteStringValue(
				$"{val.M11:0.#################################}," +
				$"{val.M12:0.#################################}," +

				$"{val.M21:0.#################################}," +
				$"{val.M22:0.#################################}"
			);
		}
	}
}