package net.minecraft.client.renderer.entity.layers;

import com.mojang.blaze3d.vertex.PoseStack;
import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
import it.unimi.dsi.fastutil.objects.Object2ObjectMap;
import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
import java.io.IOException;
import java.util.Optional;
import java.util.function.UnaryOperator;
import net.fabricmc.api.EnvType;
import net.fabricmc.api.Environment;
import net.minecraft.Util;
import net.minecraft.client.model.EntityModel;
import net.minecraft.client.model.VillagerLikeModel;
import net.minecraft.client.renderer.MultiBufferSource;
import net.minecraft.client.renderer.entity.RenderLayerParent;
import net.minecraft.client.renderer.entity.state.LivingEntityRenderState;
import net.minecraft.client.renderer.entity.state.VillagerDataHolderRenderState;
import net.minecraft.client.renderer.texture.MissingTextureAtlasSprite;
import net.minecraft.client.resources.metadata.animation.VillagerMetadataSection;
import net.minecraft.core.Holder;
import net.minecraft.resources.ResourceKey;
import net.minecraft.resources.ResourceLocation;
import net.minecraft.server.packs.resources.ResourceManager;
import net.minecraft.util.Mth;
import net.minecraft.world.entity.npc.VillagerData;
import net.minecraft.world.entity.npc.VillagerProfession;
import net.minecraft.world.entity.npc.VillagerType;

@Environment(EnvType.CLIENT)
public class VillagerProfessionLayer<S extends LivingEntityRenderState & VillagerDataHolderRenderState, M extends EntityModel<S> & VillagerLikeModel>
	extends RenderLayer<S, M> {
	private static final Int2ObjectMap<ResourceLocation> LEVEL_LOCATIONS = Util.make(new Int2ObjectOpenHashMap<>(), int2ObjectOpenHashMap -> {
		int2ObjectOpenHashMap.put(1, ResourceLocation.withDefaultNamespace("stone"));
		int2ObjectOpenHashMap.put(2, ResourceLocation.withDefaultNamespace("iron"));
		int2ObjectOpenHashMap.put(3, ResourceLocation.withDefaultNamespace("gold"));
		int2ObjectOpenHashMap.put(4, ResourceLocation.withDefaultNamespace("emerald"));
		int2ObjectOpenHashMap.put(5, ResourceLocation.withDefaultNamespace("diamond"));
	});
	private final Object2ObjectMap<ResourceKey<VillagerType>, VillagerMetadataSection.Hat> typeHatCache = new Object2ObjectOpenHashMap<>();
	private final Object2ObjectMap<ResourceKey<VillagerProfession>, VillagerMetadataSection.Hat> professionHatCache = new Object2ObjectOpenHashMap<>();
	private final ResourceManager resourceManager;
	private final String path;

	public VillagerProfessionLayer(RenderLayerParent<S, M> renderer, ResourceManager resourceManager, String path) {
		super(renderer);
		this.resourceManager = resourceManager;
		this.path = path;
	}

	public void render(PoseStack poseStack, MultiBufferSource multiBufferSource, int i, S livingEntityRenderState, float f, float g) {
		if (!livingEntityRenderState.isInvisible) {
			VillagerData villagerData = livingEntityRenderState.getVillagerData();
			if (villagerData != null) {
				Holder<VillagerType> holder = villagerData.type();
				Holder<VillagerProfession> holder2 = villagerData.profession();
				VillagerMetadataSection.Hat hat = this.getHatData(this.typeHatCache, "type", holder);
				VillagerMetadataSection.Hat hat2 = this.getHatData(this.professionHatCache, "profession", holder2);
				M entityModel = this.getParentModel();
				entityModel.hatVisible(hat2 == VillagerMetadataSection.Hat.NONE || hat2 == VillagerMetadataSection.Hat.PARTIAL && hat != VillagerMetadataSection.Hat.FULL);
				ResourceLocation resourceLocation = this.getResourceLocation("type", holder);
				renderColoredCutoutModel(entityModel, resourceLocation, poseStack, multiBufferSource, i, livingEntityRenderState, -1);
				entityModel.hatVisible(true);
				if (!holder2.is(VillagerProfession.NONE) && !livingEntityRenderState.isBaby) {
					ResourceLocation resourceLocation2 = this.getResourceLocation("profession", holder2);
					renderColoredCutoutModel(entityModel, resourceLocation2, poseStack, multiBufferSource, i, livingEntityRenderState, -1);
					if (!holder2.is(VillagerProfession.NITWIT)) {
						ResourceLocation resourceLocation3 = this.getResourceLocation(
							"profession_level", LEVEL_LOCATIONS.get(Mth.clamp(villagerData.level(), 1, LEVEL_LOCATIONS.size()))
						);
						renderColoredCutoutModel(entityModel, resourceLocation3, poseStack, multiBufferSource, i, livingEntityRenderState, -1);
					}
				}
			}
		}
	}

	private ResourceLocation getResourceLocation(String folder, ResourceLocation location) {
		return location.withPath((UnaryOperator<String>)(string2 -> "textures/entity/" + this.path + "/" + folder + "/" + string2 + ".png"));
	}

	private ResourceLocation getResourceLocation(String folder, Holder<?> holder) {
		return (ResourceLocation)holder.unwrapKey()
			.map(resourceKey -> this.getResourceLocation(folder, resourceKey.location()))
			.orElse(MissingTextureAtlasSprite.getLocation());
	}

	public <K> VillagerMetadataSection.Hat getHatData(Object2ObjectMap<ResourceKey<K>, VillagerMetadataSection.Hat> cache, String folder, Holder<K> key) {
		ResourceKey<K> resourceKey = (ResourceKey<K>)key.unwrapKey().orElse(null);
		return resourceKey == null
			? VillagerMetadataSection.Hat.NONE
			: cache.computeIfAbsent(
				resourceKey,
				object -> (VillagerMetadataSection.Hat)this.resourceManager.getResource(this.getResourceLocation(folder, resourceKey.location())).flatMap(resource -> {
					try {
						return resource.metadata().getSection(VillagerMetadataSection.TYPE).map(VillagerMetadataSection::hat);
					} catch (IOException var2) {
						return Optional.empty();
					}
				}).orElse(VillagerMetadataSection.Hat.NONE)
			);
	}
}