using Sandbox;

namespace RedSnail.WaterTool2;

/// <summary>
/// A wave profile: two Gerstner wave sums, short detail waves and long swell, each with its own strength, speed, size,
/// direction and octaves. A water network is built on one profile; each river and lake scales it with its own
/// wave strength, so connected water always shares one continuous wave field.
/// </summary>
[AssetType(Name = "Water Definition", Extension = "wtdef2", Category = "Water Tool 2")]
public sealed class WaterDefinition : GameResource
{
	[Property, Group("Detail")] public float WavesIntensity { get; set; } = 4.0f;
	[Property, Group("Detail"), Range(0, 5)] public float WavesSpeed { get; set; } = 0.3f;
	[Property, Group("Detail")] public float WavesScale { get; set; } = 0.05f;
	[Property, Group("Detail")] public Vector2 WavesDirection { get; set; } = new Vector2(1, 0.5f);
	[Property, Group("Detail"), Range(1, 5)] public int WavesOctaves { get; set; } = 3;
	[Property, Group("Detail")] public float WavesLacunarity { get; set; } = 2.0f;
	[Property, Group("Detail"), Range(0, 1)] public float WavesPersistence { get; set; } = 0.5f;
	[Property, Group("Detail"), Range(0, 1)] public float WavesSteepness { get; set; } = 0.5f;

	[Property, Group("Swell")] public float SwellIntensity { get; set; } = 15.0f;
	[Property, Group("Swell"), Range(0, 500)] public float SwellSpeed { get; set; } = 100.0f;
	[Property, Group("Swell")] public float SwellScale { get; set; } = 0.002f;
	[Property, Group("Swell")] public Vector2 SwellDirection { get; set; } = new Vector2(0.7f, 0.3f);
	[Property, Group("Swell"), Range(1, 4)] public int SwellOctaves { get; set; } = 2;
	[Property, Group("Swell")] public float SwellLacunarity { get; set; } = 1.8f;
	[Property, Group("Swell"), Range(0, 1)] public float SwellPersistence { get; set; } = 0.6f;
	[Property, Group("Swell"), Range(0, 1)] public float SwellSteepness { get; set; } = 0.3f;



	/// <summary>
	/// Used when a network has no profile of its own: gentle lake waves.
	/// </summary>
	public static WaterDefinition Fallback { get; } = new()
	{
		WavesIntensity = 0.4f,
		WavesSpeed = 5.0f,
		WavesScale = 0.1f,
		WavesDirection = new Vector2(1.0f, 0.5f),
		WavesOctaves = 3,
		WavesLacunarity = 2.0f,
		WavesPersistence = 1.0f,
		WavesSteepness = 0.5f,
		SwellIntensity = 5.0f,
		SwellSpeed = 80.0f,
		SwellScale = 0.015f,
		SwellDirection = new Vector2(0.7f, 0.3f),
		SwellOctaves = 2,
		SwellLacunarity = 1.8f,
		SwellPersistence = 0.6f,
		SwellSteepness = 0.3f
	};



	/// <summary>
	/// Used when the sea has no profile of its own: long ocean swell under small chop.
	/// </summary>
	public static WaterDefinition SeaFallback { get; } = new()
	{
		WavesIntensity = 1.0f,
		WavesSpeed = 50.0f,
		WavesScale = 0.01f,
		WavesDirection = new Vector2(1.0f, 0.5f),
		WavesOctaves = 3,
		WavesLacunarity = 2.0f,
		WavesPersistence = 0.5f,
		WavesSteepness = 0.5f,
		SwellIntensity = 50.0f,
		SwellSpeed = 400.0f,
		SwellScale = 0.002f,
		SwellDirection = new Vector2(0.7f, 0.3f),
		SwellOctaves = 3,
		SwellLacunarity = 1.8f,
		SwellPersistence = 0.6f,
		SwellSteepness = 0.3f
	};



	/// <summary>
	/// Hands the profile to the water shader. The prefix names which wave set it fills: none for the rivers and lakes,
	/// "Sea" for the sea.
	/// </summary>
	public void ApplyTo(RenderAttributes _Attributes, string _Prefix = "")
	{
		_Attributes.Set(_Prefix + "WavesIntensity", WavesIntensity);
		_Attributes.Set(_Prefix + "WavesSpeed", WavesSpeed);
		_Attributes.Set(_Prefix + "WavesScale", WavesScale);
		_Attributes.Set(_Prefix + "WavesDirection", WavesDirection);
		_Attributes.Set(_Prefix + "WavesOctaves", WavesOctaves);
		_Attributes.Set(_Prefix + "WavesLacunarity", WavesLacunarity);
		_Attributes.Set(_Prefix + "WavesPersistence", WavesPersistence);
		_Attributes.Set(_Prefix + "WavesSteepness", WavesSteepness);

		_Attributes.Set(_Prefix + "SwellIntensity", SwellIntensity);
		_Attributes.Set(_Prefix + "SwellSpeed", SwellSpeed);
		_Attributes.Set(_Prefix + "SwellScale", SwellScale);
		_Attributes.Set(_Prefix + "SwellDirection", SwellDirection);
		_Attributes.Set(_Prefix + "SwellOctaves", SwellOctaves);
		_Attributes.Set(_Prefix + "SwellLacunarity", SwellLacunarity);
		_Attributes.Set(_Prefix + "SwellPersistence", SwellPersistence);
		_Attributes.Set(_Prefix + "SwellSteepness", SwellSteepness);
	}



	protected override Bitmap CreateAssetTypeIcon(int _Width, int _Height)
	{
		return CreateSimpleAssetTypeIcon("water", _Width, _Height, "#4287f5", "white");
	}
}