using Sandbox;
using System;


using Sandbox;
using Sandbox.Rendering;

[Title( "Anamorphic Flares" )]
[Category( "Post Processing" )]
[Icon( "align_horizontal_center" )]
public sealed class CCSAnamorphicFlares : BasePostProcess<CCSAnamorphicFlares>
{
	[Property, Title("Threshold"), Range(0.0f, 1.0f)]
	public float Threshold { get; set; } = 0.6f;

	[Property, Title("Intensity"), Range(0.0f, 10.0f)]
	public float Intensity { get; set; } = 3.0f;

	[Property, Title("Streak Length"), Range(10.0f, 256.0f)]
	public float StreakLength { get; set; } = 100.0f;

	/// <summary>
	/// Exponential falloff factor. Higher = thinner streaks.
	/// Works as fractional value: Falloff / 100.0
	/// </summary>
	[Property, Title("Falloff"), Range(0.1f, 20.0f)]
	public float Falloff { get; set; } = 5.0f;

	[Property, Title("Streak Color")]
	public Color Tint { get; set; } = new Color(0.5f, 0.7f, 1.0f, 1.0f);

	[Property, Title("Horizontal Streaks")]
	public bool Horizontal { get; set; } = true;

	[Property, Title("Vertical Streaks")]
	public bool Vertical { get; set; } = false;

	public override void Render()
	{
		Attributes.Set("Threshold", Threshold);
		Attributes.Set("Intensity", Intensity);
		Attributes.Set("StreakLength", StreakLength);
		Attributes.Set("Falloff", Falloff);
		Attributes.Set("Tint", new Vector3(Tint.r, Tint.g, Tint.b));
		Attributes.Set("Horizontal", Horizontal ? 1 : 0);
		Attributes.Set("Vertical", Vertical ? 1 : 0);

		var material = Material.FromShader("postprocess/ccs_anamorphicflare.shader");
		if (material == null)
		{
			Log.Error("CCSAnamorphicFlares: Shader not found!");
			return;
		}

		var blit = BlitMode.WithBackbuffer(material, Stage.AfterPostProcess, 4000, false);
		Blit(blit, "CCSAnamorphicFlares");
	}
}