using DG.Tweening;
using UnityEngine;
using AibisDream.Utility;

namespace AibisDream
{
    /// <summary>
    /// Drives the unified EyeUnifiedSprite path for Peipei eye targets.
    /// </summary>
    public class EyeTargetVisual : MonoBehaviour
    {
        private static readonly int ColorRevealId = Shader.PropertyToID("_ColorReveal");
        private static readonly int GrayAmountId = Shader.PropertyToID("_GrayAmount");
        private static readonly int BlurAmountId = Shader.PropertyToID("_BlurAmount");
        private static readonly int BlurSizeId = Shader.PropertyToID("_BlurSize");
        private static readonly int DistortAmountId = Shader.PropertyToID("_DistortAmount");
        private static readonly int WrongColorAmountId = Shader.PropertyToID("_WrongColorAmount");
        private static readonly int SpriteFadeId = Shader.PropertyToID("_SpriteFade");
        private static readonly int AsciiAmountId = Shader.PropertyToID("_AsciiAmount");
        private static readonly int DreamAmountId = Shader.PropertyToID("_DreamAmount");
        private static readonly int MemoryAmountId = Shader.PropertyToID("_MemoryAmount");
        private static readonly int ScanlineAmountId = Shader.PropertyToID("_ScanlineAmount");
        private static readonly int GlitchAmountId = Shader.PropertyToID("_GlitchAmount");
        private static readonly int HsvShiftId = Shader.PropertyToID("_HsvShift");
        private static readonly int HsvSaturationId = Shader.PropertyToID("_HsvSaturation");
        private static readonly int RoundWaveStrengthId = Shader.PropertyToID("_RoundWaveStrength");

        private static readonly int RevealWidthId = Shader.PropertyToID("_RevealWidth");
        private static readonly int RevealRotationId = Shader.PropertyToID("_RevealRotation");
        private static readonly int RevealNoiseId = Shader.PropertyToID("_RevealNoise");
        private static readonly int WrongColorId = Shader.PropertyToID("_WrongColor");

        [SerializeField] private SpriteRenderer spriteRenderer;
        [SerializeField] private SpriteRenderer imageSpriteRenderer;
        [SerializeField] private bool driveImageLayer = true;

        private Material material;
        private float activeBlurSize = 0.008f;

        public bool IsReady => material != null && material.HasProperty(ColorRevealId);
        public bool CanDriveImageLayer => driveImageLayer && imageSpriteRenderer != null;
        public Material Material => material;

        private void Awake()
        {
            EnsureMaterial();
        }

        public bool EnsureMaterial()
        {
            if (spriteRenderer == null)
            {
                spriteRenderer = GetComponent<SpriteRenderer>();
            }

            if (spriteRenderer == null)
            {
                return false;
            }

            material = spriteRenderer.material;
            return IsReady;
        }

        public void Configure(SpriteRenderer mainRenderer, SpriteRenderer imageRenderer)
        {
            spriteRenderer = mainRenderer;
            imageSpriteRenderer = imageRenderer;
            EnsureMaterial();
        }

        public void ApplyTuning(EyeVisualSettings settings)
        {
            if (settings == null)
            {
                return;
            }

            activeBlurSize = settings.blurSize;

            if (!EnsureMaterial())
            {
                return;
            }

            material.SetFloat(RevealWidthId, settings.revealWidth);
            material.SetFloat(RevealRotationId, settings.revealRotation);
            material.SetFloat(RevealNoiseId, settings.revealNoise);
            material.SetColor(WrongColorId, settings.wrongColor);
            SetFloatRaw(HsvSaturationId, settings.hsvSaturation);
            SyncBlurSizeToMaterial();
        }

        public void SyncBlurSizeToMaterial()
        {
            if (!EnsureMaterial() || !material.HasProperty(BlurSizeId))
            {
                return;
            }

            float blur = material.GetFloat(BlurAmountId);
            material.SetFloat(BlurSizeId, blur > 0.01f ? activeBlurSize : 0f);
        }

        public void KillActiveTweens()
        {
            if (material != null)
            {
                material.DOKill();
            }

            if (driveImageLayer && imageSpriteRenderer != null)
            {
                imageSpriteRenderer.DOKill();
            }
        }

        public void ResetVisual(float reveal)
        {
            if (!EnsureMaterial())
            {
                return;
            }

            SetFloat(ColorRevealId, reveal);
            SetFloat(GrayAmountId, 1f - reveal);
            SetFloat(BlurAmountId, 1f);
            if (material.HasProperty(BlurSizeId))
            {
                material.SetFloat(BlurSizeId, activeBlurSize);
            }
            SetFloat(DistortAmountId, 0f);
            SetFloat(WrongColorAmountId, 0f);
            SetFloat(SpriteFadeId, 1f);
            SetFloat(AsciiAmountId, 0f);
            SetFloat(DreamAmountId, 0f);
            SetFloat(MemoryAmountId, 0f);
            SetFloat(ScanlineAmountId, 0f);
            SetFloat(GlitchAmountId, 0f);
            SetFloat(HsvShiftId, 0f);
            SetFloat(HsvSaturationId, 1f);
            SetFloat(RoundWaveStrengthId, 0f);
            SetImageAlpha(0f);
        }

        public void SetColorReveal(float value)
        {
            SetFloat(ColorRevealId, value);
            SetFloat(GrayAmountId, 1f - value);
        }

        public Tween TweenColorReveal(float value, float duration)
        {
            if (!EnsureMaterial())
            {
                return null;
            }

            value = Mathf.Clamp01(value);
            Sequence sequence = DOTween.Sequence();
            sequence.Join(material.DOFloat(value, ColorRevealId, duration));
            sequence.Join(material.DOFloat(1f - value, GrayAmountId, duration));
            return sequence;
        }

        public void SetBlur(float value)
        {
            SetFloat(BlurAmountId, value);
            if (EnsureMaterial() && material.HasProperty(BlurSizeId))
            {
                material.SetFloat(BlurSizeId, value > 0.01f ? activeBlurSize : 0f);
            }
        }

        public Tween TweenBlur(float value, float duration)
        {
            return TweenFloat(BlurAmountId, value, duration);
        }

        public void SetWrongColor(float value)
        {
            SetFloat(WrongColorAmountId, value);
        }

        public Tween TweenWrongColor(float value, float duration)
        {
            return TweenFloat(WrongColorAmountId, value, duration);
        }

        public Tween PulseDistortion(float amount, float duration)
        {
            if (!EnsureMaterial())
            {
                return null;
            }

            return material.DOFloat(amount, DistortAmountId, Mathf.Max(0.01f, duration * 0.5f))
                .SetEase(Ease.InOutSine)
                .SetLoops(2, LoopType.Yoyo);
        }

        public void SetImageAlpha(float alpha)
        {
            if (!driveImageLayer || imageSpriteRenderer == null)
            {
                return;
            }

            imageSpriteRenderer.SetAlpha(alpha);
        }

        public Tween TweenImageAlpha(float alpha, float duration)
        {
            if (!driveImageLayer || imageSpriteRenderer == null)
            {
                return null;
            }

            return imageSpriteRenderer.DOFade(alpha, duration);
        }

        public void SetUfWeights(float ascii, float dream, float memory)
        {
            SetFloat(AsciiAmountId, ascii);
            SetFloat(DreamAmountId, dream);
            SetFloat(MemoryAmountId, memory);
            SetFloat(ScanlineAmountId, Mathf.Max(ascii, memory));
        }

        public Tween TweenUfWeights(float ascii, float dream, float memory, float duration)
        {
            if (!EnsureMaterial())
            {
                return null;
            }

            Sequence sequence = DOTween.Sequence();
            sequence.Join(material.DOFloat(Mathf.Clamp01(ascii), AsciiAmountId, duration));
            sequence.Join(material.DOFloat(Mathf.Clamp01(dream), DreamAmountId, duration));
            sequence.Join(material.DOFloat(Mathf.Clamp01(memory), MemoryAmountId, duration));
            sequence.Join(material.DOFloat(Mathf.Clamp01(Mathf.Max(ascii, memory)), ScanlineAmountId, duration));
            return sequence;
        }

        public void SetSaturation(float saturation)
        {
            SetFloatRaw(HsvSaturationId, Mathf.Clamp(saturation, 0f, 2f));
        }

        public Tween TweenSaturation(float saturation, float duration)
        {
            return TweenFloat(HsvSaturationId, Mathf.Clamp(saturation, 0f, 2f), duration);
        }

        public Sequence StartGlitch(float duration = 1f)
        {
            if (!EnsureMaterial())
            {
                return null;
            }

            duration = Mathf.Max(0.01f, duration);
            Sequence sequence = DOTween.Sequence();
            sequence.Join(material.DOFloat(1f, GlitchAmountId, duration));
            sequence.Join(material.DOFloat(0.02f, DistortAmountId, duration));
            sequence.Join(material.DOFloat(360f, HsvShiftId, duration).SetLoops(-1, LoopType.Yoyo));
            return sequence;
        }

        public void StopGlitch(float duration)
        {
            TweenFloat(GlitchAmountId, 0f, duration);
            TweenFloat(DistortAmountId, 0f, duration);
            TweenFloat(HsvShiftId, 0f, duration);
        }

        public Tween TweenRoundWave(float value, float duration)
        {
            return TweenFloat(RoundWaveStrengthId, value, duration);
        }

        private Tween TweenFloat(int propertyId, float value, float duration)
        {
            if (!EnsureMaterial() || !material.HasProperty(propertyId))
            {
                return null;
            }

            return material.DOFloat(value, propertyId, duration);
        }

        private void SetFloat(int propertyId, float value)
        {
            if (!EnsureMaterial() || !material.HasProperty(propertyId))
            {
                return;
            }

            material.SetFloat(propertyId, Mathf.Clamp01(value));
        }

        private void SetFloatRaw(int propertyId, float value)
        {
            if (!EnsureMaterial() || !material.HasProperty(propertyId))
            {
                return;
            }

            material.SetFloat(propertyId, value);
        }
    }
}