using System;

namespace UnityEngine.PostProcessing
{
	[Serializable]
	public class AntialiasingModel : PostProcessingModel
	{
		public enum Method
		{
			Fxaa = 0,
			Taa = 1
		}

		public enum FxaaPreset
		{
			ExtremePerformance = 0,
			Performance = 1,
			Default = 2,
			Quality = 3,
			ExtremeQuality = 4
		}

		[Serializable]
		public struct FxaaQualitySettings
		{
			[Range(0f, 1f)]
			[Tooltip("The amount of desired sub-pixel aliasing removal. Effects the sharpeness of the output.")]
			public float subpixelAliasingRemovalAmount;

			[Tooltip("The minimum amount of local contrast required to qualify a region as containing an edge.")]
			[Range(0.063f, 0.333f)]
			public float edgeDetectionThreshold;

			[Tooltip("Local contrast adaptation value to disallow the algorithm from executing on the darker regions.")]
			[Range(0f, 0.0833f)]
			public float minimumRequiredLuminance;

			public static FxaaQualitySettings[] presets = new FxaaQualitySettings[5]
			{
				new FxaaQualitySettings
				{
					subpixelAliasingRemovalAmount = 0f,
					edgeDetectionThreshold = 0.333f,
					minimumRequiredLuminance = 0.0833f
				},
				new FxaaQualitySettings
				{
					subpixelAliasingRemovalAmount = 0.25f,
					edgeDetectionThreshold = 0.25f,
					minimumRequiredLuminance = 0.0833f
				},
				new FxaaQualitySettings
				{
					subpixelAliasingRemovalAmount = 0.75f,
					edgeDetectionThreshold = 0.166f,
					minimumRequiredLuminance = 0.0833f
				},
				new FxaaQualitySettings
				{
					subpixelAliasingRemovalAmount = 1f,
					edgeDetectionThreshold = 0.125f,
					minimumRequiredLuminance = 0.0625f
				},
				new FxaaQualitySettings
				{
					subpixelAliasingRemovalAmount = 1f,
					edgeDetectionThreshold = 0.063f,
					minimumRequiredLuminance = 0.0312f
				}
			};
		}

		[Serializable]
		public struct FxaaConsoleSettings
		{
			[Tooltip("The amount of spread applied to the sampling coordinates while sampling for subpixel information.")]
			[Range(0.33f, 0.5f)]
			public float subpixelSpreadAmount;

			[Range(2f, 8f)]
			[Tooltip("This value dictates how sharp the edges in the image are kept; a higher value implies sharper edges.")]
			public float edgeSharpnessAmount;

			[Range(0.125f, 0.25f)]
			[Tooltip("The minimum amount of local contrast required to qualify a region as containing an edge.")]
			public float edgeDetectionThreshold;

			[Range(0.04f, 0.06f)]
			[Tooltip("Local contrast adaptation value to disallow the algorithm from executing on the darker regions.")]
			public float minimumRequiredLuminance;

			public static FxaaConsoleSettings[] presets = new FxaaConsoleSettings[5]
			{
				new FxaaConsoleSettings
				{
					subpixelSpreadAmount = 0.33f,
					edgeSharpnessAmount = 8f,
					edgeDetectionThreshold = 0.25f,
					minimumRequiredLuminance = 0.06f
				},
				new FxaaConsoleSettings
				{
					subpixelSpreadAmount = 0.33f,
					edgeSharpnessAmount = 8f,
					edgeDetectionThreshold = 0.125f,
					minimumRequiredLuminance = 0.06f
				},
				new FxaaConsoleSettings
				{
					subpixelSpreadAmount = 0.5f,
					edgeSharpnessAmount = 8f,
					edgeDetectionThreshold = 0.125f,
					minimumRequiredLuminance = 0.05f
				},
				new FxaaConsoleSettings
				{
					subpixelSpreadAmount = 0.5f,
					edgeSharpnessAmount = 4f,
					edgeDetectionThreshold = 0.125f,
					minimumRequiredLuminance = 0.04f
				},
				new FxaaConsoleSettings
				{
					subpixelSpreadAmount = 0.5f,
					edgeSharpnessAmount = 2f,
					edgeDetectionThreshold = 0.125f,
					minimumRequiredLuminance = 0.04f
				}
			};
		}

		[Serializable]
		public struct FxaaSettings
		{
			public FxaaPreset preset;

			public static FxaaSettings defaultSettings
			{
				get
				{
					return new FxaaSettings
					{
						preset = FxaaPreset.Default
					};
				}
			}
		}

		[Serializable]
		public struct TaaSettings
		{
			[Range(0.1f, 1f)]
			[Tooltip("The diameter (in texels) inside which jitter samples are spread. Smaller values result in crisper but more aliased output, while larger values result in more stable but blurrier output.")]
			public float jitterSpread;

			[Tooltip("Controls the amount of sharpening applied to the color buffer.")]
			[Range(0f, 3f)]
			public float sharpen;

			[Tooltip("The blend coefficient for a stationary fragment. Controls the percentage of history sample blended into the final color.")]
			[Range(0f, 0.99f)]
			public float stationaryBlending;

			[Range(0f, 0.99f)]
			[Tooltip("The blend coefficient for a fragment with significant motion. Controls the percentage of history sample blended into the final color.")]
			public float motionBlending;

			public static TaaSettings defaultSettings
			{
				get
				{
					return new TaaSettings
					{
						jitterSpread = 0.75f,
						sharpen = 0.3f,
						stationaryBlending = 0.95f,
						motionBlending = 0.85f
					};
				}
			}
		}

		[Serializable]
		public struct Settings
		{
			public Method method;

			public FxaaSettings fxaaSettings;

			public TaaSettings taaSettings;

			public static Settings defaultSettings
			{
				get
				{
					return new Settings
					{
						method = Method.Fxaa,
						fxaaSettings = FxaaSettings.defaultSettings,
						taaSettings = TaaSettings.defaultSettings
					};
				}
			}
		}

		[SerializeField]
		private Settings m_Settings = Settings.defaultSettings;

		public Settings settings
		{
			get
			{
				return m_Settings;
			}
			set
			{
				m_Settings = value;
			}
		}

		public override void Reset()
		{
			m_Settings = Settings.defaultSettings;
		}
	}
}