using Sandbox.Internal;

namespace ShaderGraphPlus.Internal.JsonConvert
{
	internal class Matrix4x4Converter : JsonConverter<Float4x4>
	{
		public override Float4x4 Read( ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options )
		{
			if ( reader.TokenType == JsonTokenType.String )
			{
				return Float4x4.Parse( reader.GetString() );
			}

			if ( reader.TokenType == JsonTokenType.StartArray )
			{
				reader.Read();
				Float4x4 result = default( Float4x4 );

				// Row 1
				if ( reader.TokenType == JsonTokenType.Number )
				{
					result.M11 = reader.GetSingle();
					reader.Read();
				}
				if ( reader.TokenType == JsonTokenType.Number )
				{
					result.M12 = reader.GetSingle();
					reader.Read();
				}
				if ( reader.TokenType == JsonTokenType.Number )
				{
					result.M13 = reader.GetSingle();
					reader.Read();
				}
				if ( reader.TokenType == JsonTokenType.Number )
				{
					result.M14 = 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();
				}
				if ( reader.TokenType == JsonTokenType.Number )
				{
					result.M23 = reader.GetSingle();
					reader.Read();
				}
				if ( reader.TokenType == JsonTokenType.Number )
				{
					result.M24 = reader.GetSingle();
					reader.Read();
				}

				// Row 3
				if ( reader.TokenType == JsonTokenType.Number )
				{
					result.M31 = reader.GetSingle();
					reader.Read();
				}
				if ( reader.TokenType == JsonTokenType.Number )
				{
					result.M32 = reader.GetSingle();
					reader.Read();
				}
				if ( reader.TokenType == JsonTokenType.Number )
				{
					result.M33 = reader.GetSingle();
					reader.Read();
				}
				if ( reader.TokenType == JsonTokenType.Number )
				{
					result.M34 = reader.GetSingle();
					reader.Read();
				}

				// Row 4
				if ( reader.TokenType == JsonTokenType.Number )
				{
					result.M41 = reader.GetSingle();
					reader.Read();
				}
				if ( reader.TokenType == JsonTokenType.Number )
				{
					result.M42 = reader.GetSingle();
					reader.Read();
				}
				if ( reader.TokenType == JsonTokenType.Number )
				{
					result.M43 = reader.GetSingle();
					reader.Read();
				}
				if ( reader.TokenType == JsonTokenType.Number )
				{
					result.M44 = reader.GetSingle();
					reader.Read();
				}

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

				return result;

			}

			Log.Warning( $"Float4x4FromJson - unable to read from {reader.TokenType}" );
			return default;
		}

		public override void Write( Utf8JsonWriter writer, Float4x4 val, JsonSerializerOptions options )
		{
			writer.WriteStringValue(
				$"{val.M11:0.#################################}," +
				$"{val.M12:0.#################################}," +
				$"{val.M13:0.#################################}," +
				$"{val.M14:0.#################################}," +

				$"{val.M21:0.#################################}," +
				$"{val.M22:0.#################################}," +
				$"{val.M23:0.#################################}," +
				$"{val.M24:0.#################################}," +

				$"{val.M31:0.#################################}," +
				$"{val.M32:0.#################################}," +
				$"{val.M33:0.#################################}," +
				$"{val.M34:0.#################################}," +

				$"{val.M41:0.#################################}," +
				$"{val.M42:0.#################################}," +
				$"{val.M43:0.#################################}," +
				$"{val.M44:0.#################################}"
			);
		}
	}
}