package net.minecraft.data.recipes;

import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import net.minecraft.advancements.AdvancementRewards;
import net.minecraft.advancements.Criterion;
import net.minecraft.advancements.Advancement.Builder;
import net.minecraft.advancements.AdvancementRequirements.Strategy;
import net.minecraft.advancements.critereon.RecipeUnlockedTrigger;
import net.minecraft.core.HolderGetter;
import net.minecraft.resources.ResourceKey;
import net.minecraft.tags.TagKey;
import net.minecraft.world.item.Item;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.crafting.Ingredient;
import net.minecraft.world.item.crafting.Recipe;
import net.minecraft.world.item.crafting.ShapelessRecipe;
import net.minecraft.world.level.ItemLike;
import org.jetbrains.annotations.Nullable;

public class ShapelessRecipeBuilder implements RecipeBuilder {
	private final HolderGetter<Item> items;
	private final RecipeCategory category;
	private final ItemStack result;
	private final List<Ingredient> ingredients = new ArrayList();
	private final Map<String, Criterion<?>> criteria = new LinkedHashMap();
	@Nullable
	private String group;

	private ShapelessRecipeBuilder(HolderGetter<Item> items, RecipeCategory category, ItemStack result) {
		this.items = items;
		this.category = category;
		this.result = result;
	}

	public static ShapelessRecipeBuilder shapeless(HolderGetter<Item> items, RecipeCategory category, ItemStack result) {
		return new ShapelessRecipeBuilder(items, category, result);
	}

	public static ShapelessRecipeBuilder shapeless(HolderGetter<Item> items, RecipeCategory category, ItemLike result) {
		return shapeless(items, category, result, 1);
	}

	public static ShapelessRecipeBuilder shapeless(HolderGetter<Item> items, RecipeCategory category, ItemLike result, int count) {
		return new ShapelessRecipeBuilder(items, category, result.asItem().getDefaultInstance().copyWithCount(count));
	}

	/**
	 * Adds an ingredient that can be any item in the given tag.
	 */
	public ShapelessRecipeBuilder requires(TagKey<Item> tag) {
		return this.requires(Ingredient.of(this.items.getOrThrow(tag)));
	}

	/**
	 * Adds an ingredient of the given item.
	 */
	public ShapelessRecipeBuilder requires(ItemLike item) {
		return this.requires(item, 1);
	}

	/**
	 * Adds the given ingredient multiple times.
	 */
	public ShapelessRecipeBuilder requires(ItemLike item, int quantity) {
		for (int i = 0; i < quantity; i++) {
			this.requires(Ingredient.of(item));
		}

		return this;
	}

	/**
	 * Adds an ingredient.
	 */
	public ShapelessRecipeBuilder requires(Ingredient ingredient) {
		return this.requires(ingredient, 1);
	}

	/**
	 * Adds an ingredient multiple times.
	 */
	public ShapelessRecipeBuilder requires(Ingredient ingredient, int quantity) {
		for (int i = 0; i < quantity; i++) {
			this.ingredients.add(ingredient);
		}

		return this;
	}

	public ShapelessRecipeBuilder unlockedBy(String name, Criterion<?> criterion) {
		this.criteria.put(name, criterion);
		return this;
	}

	public ShapelessRecipeBuilder group(@Nullable String groupName) {
		this.group = groupName;
		return this;
	}

	@Override
	public Item getResult() {
		return this.result.getItem();
	}

	@Override
	public void save(RecipeOutput output, ResourceKey<Recipe<?>> resourceKey) {
		this.ensureValid(resourceKey);
		Builder builder = output.advancement()
			.addCriterion("has_the_recipe", RecipeUnlockedTrigger.unlocked(resourceKey))
			.rewards(AdvancementRewards.Builder.recipe(resourceKey))
			.requirements(Strategy.OR);
		this.criteria.forEach(builder::addCriterion);
		ShapelessRecipe shapelessRecipe = new ShapelessRecipe(
			(String)Objects.requireNonNullElse(this.group, ""), RecipeBuilder.determineBookCategory(this.category), this.result, this.ingredients
		);
		output.accept(resourceKey, shapelessRecipe, builder.build(resourceKey.location().withPrefix("recipes/" + this.category.getFolderName() + "/")));
	}

	private void ensureValid(ResourceKey<Recipe<?>> recipe) {
		if (this.criteria.isEmpty()) {
			throw new IllegalStateException("No way of obtaining recipe " + recipe.location());
		}
	}
}