namespace XCEngine
{
    public sealed class LightingData
    {
        internal static readonly LightingData Default =
            new LightingData(
                DirectionalLightData.Default,
                false,
                0);

        internal LightingData(
            DirectionalLightData mainDirectionalLight,
            bool hasMainDirectionalShadow,
            int additionalLightCount)
        {
            this.mainDirectionalLight =
                mainDirectionalLight ?? DirectionalLightData.Default;
            this.hasMainDirectionalShadow =
                hasMainDirectionalShadow;
            this.additionalLightCount = additionalLightCount;
        }

        public DirectionalLightData mainDirectionalLight { get; }

        public bool hasMainDirectionalShadow { get; }

        public int additionalLightCount { get; }

        public bool hasMainDirectionalLight =>
            mainDirectionalLight.enabled;

        public bool hasAdditionalLights =>
            additionalLightCount > 0;
    }
}