using GAS.Runtime;
using Sog;

namespace CoreGame.Render
{
    public class CueRendererFadeOut : GameplayCueDurational
    {
        public override GameplayCueDurationalSpec CreateSpec(in GameplayCueParameters param)
        {
            var spec = SptPool<CueRendererFadeOutSpec>.Malloc();
            spec.Awake(param);
            return spec;
        }

        public override void FreeSpec(ref GameplayCueDurationalSpec spec)
        {
            var cueRendererFadeOutSpec = spec as CueRendererFadeOutSpec;
            SptPool<CueRendererFadeOutSpec>.Free(ref cueRendererFadeOutSpec);
            spec = null;
        }
    }

    public class CueRendererFadeOutSpec : GameplayCueDurationalSpec<CueRendererFadeOut>
    {
        private readonly float m_TimeSpan = 0.1f;
        private Fixed64 m_TimeAcc;
        private ChangeBodyAllSpriteInverseAlpha _changeBodyAllSpriteInverseAlpha;
        private Fixed64 m_FadeOutStep;

        public override void OnAdd()
        {
            if (ownerEnt.IsValid() == false)
                return;
            var bp = ownerEnt.bindPointProxy;
            var mainTrans = bp?.GetBindPoint(BindPointType.Main);
            _changeBodyAllSpriteInverseAlpha = mainTrans?.GetComponent<ChangeBodyAllSpriteInverseAlpha>();
            m_FadeOutStep = m_TimeSpan / duration;
        }

        public override void OnRemove()
        {
        }

        public override void OnGameplayEffectActivate()
        {
        }

        public override void OnGameplayEffectDeactivate()
        {
        }

        public override void OnTick(Fixed64 dt)
        {
            m_TimeAcc += dt;
            if (m_TimeAcc < m_TimeSpan)
            {
                return;
            }

            m_TimeAcc -= m_TimeSpan;
            if (_changeBodyAllSpriteInverseAlpha != null)
            {
                _changeBodyAllSpriteInverseAlpha.alpha += m_FadeOutStep;
                _changeBodyAllSpriteInverseAlpha.OnDidApplyAnimationProperties();
            }
        }

        public override void Awake(in GameplayCueParameters param)
        {
            base.Awake(in param);
            m_TimeAcc = 0f;
            _changeBodyAllSpriteInverseAlpha = null;
            m_FadeOutStep = 0f;
        }
    }
}