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

namespace SLSUtilities.Rendering.PostProcessing
{
    [System.Serializable, VolumeComponentMenu("SLS/Postprocessing/Hyper Tunnel")]
    public class HyperTunnel : ScriptablePostProcessorVolume
    {
        public override CustomPostProcessInjectionPoint InjectionPoint => CustomPostProcessInjectionPoint.AfterPostProcess;
        // Run after basic effects, probably before UI
        public override int OrderInInjectionPoint => 55;

        [Header("Global Pulse Color")]
        [Tooltip("Emission Color of the Speed Lines. Alpha controls opacity multiplier.")]
        public ColorParameter color = new(new Color(0f, 1f, 1f, 1f), true, true, true);
        
        [Header("Speed Lines Effect")]
        [Tooltip("Luminosity of the speed lines.")]
        public ClampedFloatParameter lineIntensity = new(0f, 0f, 10f);
        [Tooltip("The speed at which the lines fly out of the center.")]
        public FloatParameter baseSpeed = new(30f);
        
        [Header("Distortion & Blur")]
        [Tooltip("How strongly the environment is pulled into a radial motion blur.")]
        public ClampedFloatParameter radialBlurAmount = new(0f, 0f, 0.2f);
        [Tooltip("RGB split dispersion amount when pulsing.")]
        public ClampedFloatParameter chromaticAberration = new(0f, 0f, 5f);

        [Header("VFX Center")]
        [Tooltip("The vanishing point (0.5, 0.5 is the exact screen center)")]
        public Vector2Parameter vfxCenter = new(new Vector2(0.5f, 0.5f));

        public override string GetShaderName() => "SLS/Postprocessing/HyperTunnel";
        public override bool IsActive() => (lineIntensity.value > 0f || radialBlurAmount.value > 0f || chromaticAberration.value > 0f);
        
        public override void Render(CommandBuffer cmd, ref RenderingData renderingData, RTHandle source, RTHandle target)
        {
            if (material == null) return;
            
            material.SetColor(InternalShaderHelpers.ID._HyperTunnelColor, color.value);
            
            Vector4 p = new Vector4(baseSpeed.value, lineIntensity.value, radialBlurAmount.value, chromaticAberration.value);
            material.SetVector(InternalShaderHelpers.ID._HyperTunnelParams, p);
            material.SetVector(InternalShaderHelpers.ID._HyperTunnelCenter, vfxCenter.value);

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