using Echovoid.Runtime.Behavior.Rendering;
using UnityEngine;
using UnityEngine.Rendering;
using UnityEngine.Rendering.Universal;

namespace SLSFramework.Rendering.PostProcessing
{
    [System.Serializable, VolumeComponentMenu("SLS/Postprocessing/Strobe Flash")]
    public class StrobeFlash : ScriptablePostProcessorVolume
    {
        public override CustomPostProcessInjectionPoint InjectionPoint => CustomPostProcessInjectionPoint.BeforePostProcess;
        public override int OrderInInjectionPoint => 5;

        [Header("Master Switch")]
        public BoolParameter enableEffect = new(false);

        [Header("Binary Colors")]
        public ColorParameter colorHigh = new(Color.white);
        public ColorParameter colorLow = new(Color.black);

        [Header("Threshold & Flash")]
        public ClampedFloatParameter grading = new(0.5f, 0f, 1f);
        public BoolParameter autoFlash = new(false);
        public FloatParameter frequency = new(15f);
        public BoolParameter manualInvert = new(false);

        [Header("Optimizations (Art Style)")]
        [Tooltip("预模糊：消除地面的细碎噪点。")]
        public ClampedFloatParameter noiseReduction = new(1.5f, 0f, 5f);

        [Tooltip("柔化边缘：让黑白交界处不那么生硬。")]
        public ClampedFloatParameter softness = new(0.05f, 0f, 0.5f);

        [Header("Outline Settings")]
        [Tooltip("描边粗细：建议值 1.0 - 2.0。如果太小可能看不见。")]
        public ClampedFloatParameter outlineThickness = new(1f, 0f, 5f);

        [Tooltip("描边敏感度阈值 (米)：深度差超过此值才画线。\n解决地面全黑的关键参数！\n建议值：0.5 - 2.0。")]
        public MinFloatParameter outlineThreshold = new(1.0f, 0f); // 默认设为 1米

        [Tooltip("感光权重")]
        public Vector3Parameter luminanceWeights = new(new Vector3(0.2126f, 0.7152f, 0.0722f));

        public override string GetShaderName() => "SLS/Postprocessing/StrobeFlash";

        public override void Render(CommandBuffer cmd, ref RenderingData renderingData, RTHandle source, RTHandle destination)
        {
            if (material == null) return;

            material.SetColor(InternalShaderHelpers.ID._StrobeColorHigh, colorHigh.value);
            material.SetColor(InternalShaderHelpers.ID._StrobeColorLow, colorLow.value);
            material.SetVector(InternalShaderHelpers.ID._LuminanceWeights, new Vector4(luminanceWeights.value.x, luminanceWeights.value.y, luminanceWeights.value.z, 0));

            Vector4 paramsVec = new Vector4(
                frequency.value, 
                grading.value, 
                autoFlash.value ? 1f : 0f, 
                manualInvert.value ? 1f : 0f
            );
            material.SetVector(InternalShaderHelpers.ID._StrobeParams, paramsVec);

            // 更新：传入 outlineThreshold (w分量)
            Vector4 advParamsVec = new Vector4(
                noiseReduction.value,
                softness.value,
                outlineThickness.value,
                outlineThreshold.value 
            );
            material.SetVector(InternalShaderHelpers.ID._StrobeAdvParams, advParamsVec);

            Blitter.BlitCameraTexture(cmd, source, destination, material, 0);
        }

        public override bool IsActive() => enableEffect.value;
    }
}