package net.minecraft.client.model;

import java.util.function.Function;
import net.minecraft.client.model.geom.ModelPart;
import net.minecraft.client.model.geom.PartPose;
import net.minecraft.client.model.geom.builders.CubeDeformation;
import net.minecraft.client.model.geom.builders.CubeListBuilder;
import net.minecraft.client.model.geom.builders.MeshDefinition;
import net.minecraft.client.model.geom.builders.PartDefinition;
import net.minecraft.client.renderer.entity.state.LivingEntityRenderState;
import net.minecraft.client.renderer.rendertype.RenderType;
import net.minecraft.client.renderer.rendertype.RenderTypes;
import net.minecraft.resources.Identifier;
import net.minecraft.util.Mth;

public class QuadrupedModel<T extends LivingEntityRenderState> extends EntityModel<T> {
	protected final ModelPart head;
	protected final ModelPart body;
	protected final ModelPart rightHindLeg;
	protected final ModelPart leftHindLeg;
	protected final ModelPart rightFrontLeg;
	protected final ModelPart leftFrontLeg;

	protected QuadrupedModel(final ModelPart root) {
		this(root, RenderTypes::entityCutout);
	}

	protected QuadrupedModel(final ModelPart root, final Function<Identifier, RenderType> renderType) {
		super(root, renderType);
		this.head = root.getChild("head");
		this.body = root.getChild("body");
		this.rightHindLeg = root.getChild("right_hind_leg");
		this.leftHindLeg = root.getChild("left_hind_leg");
		this.rightFrontLeg = root.getChild("right_front_leg");
		this.leftFrontLeg = root.getChild("left_front_leg");
	}

	public static MeshDefinition createBodyMesh(final int legSize, final boolean mirrorLeftLeg, final boolean mirrorRightLeg, final CubeDeformation g) {
		MeshDefinition mesh = new MeshDefinition();
		PartDefinition root = mesh.getRoot();
		root.addOrReplaceChild(
			"head", CubeListBuilder.create().texOffs(0, 0).addBox(-4.0F, -4.0F, -8.0F, 8.0F, 8.0F, 8.0F, g), PartPose.offset(0.0F, 18 - legSize, -6.0F)
		);
		root.addOrReplaceChild(
			"body",
			CubeListBuilder.create().texOffs(28, 8).addBox(-5.0F, -10.0F, -7.0F, 10.0F, 16.0F, 8.0F, g),
			PartPose.offsetAndRotation(0.0F, 17 - legSize, 2.0F, (float) (Math.PI / 2), 0.0F, 0.0F)
		);
		createLegs(root, mirrorLeftLeg, mirrorRightLeg, legSize, g);
		return mesh;
	}

	public static void createLegs(final PartDefinition root, final boolean mirrorLeftLeg, final boolean mirrorRightLeg, final int legSize, final CubeDeformation g) {
		CubeListBuilder rightLeg = CubeListBuilder.create().mirror(mirrorRightLeg).texOffs(0, 16).addBox(-2.0F, 0.0F, -2.0F, 4.0F, (float)legSize, 4.0F, g);
		CubeListBuilder leftLeg = CubeListBuilder.create().mirror(mirrorLeftLeg).texOffs(0, 16).addBox(-2.0F, 0.0F, -2.0F, 4.0F, (float)legSize, 4.0F, g);
		root.addOrReplaceChild("right_hind_leg", rightLeg, PartPose.offset(-3.0F, 24 - legSize, 7.0F));
		root.addOrReplaceChild("left_hind_leg", leftLeg, PartPose.offset(3.0F, 24 - legSize, 7.0F));
		root.addOrReplaceChild("right_front_leg", rightLeg, PartPose.offset(-3.0F, 24 - legSize, -5.0F));
		root.addOrReplaceChild("left_front_leg", leftLeg, PartPose.offset(3.0F, 24 - legSize, -5.0F));
	}

	public void setupAnim(final T state) {
		super.setupAnim(state);
		this.head.xRot = state.xRot * (float) (Math.PI / 180.0);
		this.head.yRot = state.yRot * (float) (Math.PI / 180.0);
		float animationPos = state.walkAnimationPos;
		float animationSpeed = state.walkAnimationSpeed;
		this.rightHindLeg.xRot = Mth.cos(animationPos * 0.6662F) * 1.4F * animationSpeed;
		this.leftHindLeg.xRot = Mth.cos(animationPos * 0.6662F + (float) Math.PI) * 1.4F * animationSpeed;
		this.rightFrontLeg.xRot = Mth.cos(animationPos * 0.6662F + (float) Math.PI) * 1.4F * animationSpeed;
		this.leftFrontLeg.xRot = Mth.cos(animationPos * 0.6662F) * 1.4F * animationSpeed;
	}
}