using System;

namespace CharacterEditor;

/// <summary>Authored whole-pinna targets on the shared human rig.</summary>
public static class AnimalEarShape
{
	public const string MorphPrefix = "ce_animal_human";
	// Older unblended bodies do not contain the authored ear targets. Only this
	// new endpoint opts into the shared rig; legacy Human/Goblin/Elf stay exact.
	public static void Prepare(CharacterAppearanceData appearance)
	{
		if (appearance?.BaseShape is null && appearance?.EarBlend is { Valid: true }
			&& EarShapes.Weights(appearance).z > 0)
			UnifiedHuman.Enable(appearance);
	}

	public static void Apply(SkinnedModelRenderer body, CharacterAppearanceData appearance)
	{
		if (appearance.BaseShape is null) return;
		float amount = EarShapes.Weights(PhotoFace.ApplyOffsets(appearance)).z;
		var weights = FaceRegions.Weights(appearance.BaseShape, "ears");
		for (int i = 0; i < 7; i++)
			body.Morphs.Set($"{MorphPrefix}{i + 1:00}", weights[i] * amount, 0);
	}
}