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package lv.enes.mc.eris_alchemy;
import jakarta.annotation.Nonnull;
import jakarta.annotation.Nullable;
import lv.enes.mc.eris_alchemy.utils.ItemUtils;
import net.minecraft.core.registries.BuiltInRegistries;
import net.minecraft.core.registries.Registries;
import net.minecraft.resources.ResourceLocation;
import net.minecraft.tags.TagKey;
import net.minecraft.world.item.BlockItem;
import net.minecraft.world.item.Item;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.crafting.Ingredient;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.block.Block;
import java.text.DecimalFormat;
import java.util.*;
import java.util.stream.Stream;
public class Emc {
private static final Map<ResourceLocation, OptionalDouble> ITEM_VALUES = new HashMap<>();
private static final Map<TagKey<Item>, OptionalDouble> ITEM_TAG_VALUES = new HashMap<>();
private static final Map<TagKey<Block>, OptionalDouble> BLOCK_TAG_VALUES = new HashMap<>();
private static final List<SimplifiedRecipe> FAKE_RECIPES = new ArrayList<>();
private static final Map<Level, Emc> instances = Collections.synchronizedMap(new WeakHashMap<>());
private static final DecimalFormat formatter = new DecimalFormat("0");
static {
formatter.setMaximumFractionDigits(1);
}
public static Emc getInstance(@Nonnull Level world) {
if (instances.containsKey(world)) {
return instances.get(world);
}
var instance = new Emc(world);
instances.put(world, instance);
return instance;
}
public static String formatEmc(double value) {
return formatter.format(value);
}
public static void reloadData(
Map<ResourceLocation, OptionalDouble> itemValues,
Map<ResourceLocation, OptionalDouble> itemTagValues,
Map<ResourceLocation, OptionalDouble> blockTagValues,
List<SimplifiedRecipe> fakeRecipes
) {
ITEM_VALUES.clear();
ITEM_VALUES.putAll(itemValues);
ITEM_TAG_VALUES.clear();
itemTagValues.forEach((id, value) -> ITEM_TAG_VALUES.put(TagKey.create(Registries.ITEM, id), value));
BLOCK_TAG_VALUES.clear();
blockTagValues.forEach((id, value) -> BLOCK_TAG_VALUES.put(TagKey.create(Registries.BLOCK, id), value));
FAKE_RECIPES.clear();
FAKE_RECIPES.addAll(fakeRecipes);
instances.clear();
}
private final Map<ResourceLocation, OptionalDouble> data;
private Emc(@Nonnull Level world) {
data = Collections.synchronizedMap(new HashMap<>(ITEM_VALUES));
ITEM_TAG_VALUES.forEach(
(tag, emcValue) -> BuiltInRegistries.ITEM
.getTagOrEmpty(tag)
.forEach(holder -> data.putIfAbsent(ItemUtils.getId(holder), emcValue))
);
BLOCK_TAG_VALUES.forEach(
(tag, emcValue) -> BuiltInRegistries.BLOCK
.getTagOrEmpty(tag)
.forEach(holder -> data.putIfAbsent(ItemUtils.getId(holder), emcValue))
);
ErisAlchemy.LOGGER.info("Calculating EMC values...");
var recipes = getRecipes(world);
var configured = new HashSet<>(data.keySet());
BuiltInRegistries.ITEM.keySet().forEach(item -> {
configEmc(recipes, configured, item);
if (!data.containsKey(item)) {
ErisAlchemy.LOGGER.warn("No EMC value for '{}' known", item);
}
});
}
public OptionalDouble get(ItemStack stack) {
if (stack.isEmpty()) {
return OptionalDouble.empty();
}
var item = stack.getItem();
var itemId = ItemUtils.getId(item);
return get(itemId)
.stream()
.map(value -> {
EmcStorage storage = null;
if (item instanceof EmcStorage emcStorage) {
storage = emcStorage;
} else if (item instanceof BlockItem blockItem) {
if (blockItem.getBlock() instanceof EmcStorage emcStorage) {
storage = emcStorage;
}
}
if (storage != null) {
return value + storage.getStoredEmc(stack);
}
return value;
})
.findFirst();
}
public OptionalDouble get(ResourceLocation itemId) {
return data.getOrDefault(itemId, OptionalDouble.empty());
}
private List<SimplifiedRecipe> getRecipes(@Nullable Level world) {
Stream<SimplifiedRecipe> recipes = FAKE_RECIPES.stream();
if (world != null) {
recipes = Stream.concat(
recipes,
world.getRecipeManager()
.getRecipes()
.stream()
.map(recipe -> new SimplifiedRecipe(recipe, world.registryAccess()))
);
}
return recipes.toList();
}
private OptionalDouble configEmc(
List<SimplifiedRecipe> recipes,
Set<ResourceLocation> configured,
ResourceLocation itemId
) {
var res = get(itemId);
if (res.isPresent() || configured.contains(itemId)) {
return res;
}
configured.add(itemId);
var item = BuiltInRegistries.ITEM.get(itemId);
res = recipes.stream()
.filter(recipe -> recipe.output().is(item))
.map(recipe -> calculateEmcForRecipe(recipes, configured, recipe))
.flatMapToDouble(OptionalDouble::stream)
.average();
res.ifPresentOrElse(
emc -> data.put(itemId, OptionalDouble.of(emc)),
() -> configured.remove(itemId)
);
return res;
}
private OptionalDouble calculateEmcForRecipe(
List<SimplifiedRecipe> recipes,
Set<ResourceLocation> configured,
SimplifiedRecipe recipe
) {
try {
if (recipe.input().isEmpty()) {
return OptionalDouble.empty();
}
var inputEmc = recipe.input()
.stream()
.map(ingredient -> calculateEmcForIngredient(recipes, configured, ingredient))
.mapToDouble(OptionalDouble::orElseThrow)
.sum();
var remainderEmc = recipe.remainder()
.stream()
.map(remainder -> configEmc(recipes, configured, ItemUtils.getId(remainder)))
.mapToDouble(OptionalDouble::orElseThrow)
.sum();
if (remainderEmc > inputEmc) {
ErisAlchemy.LOGGER.warn("Recipe generating {} creates too much EMC out of thin air!", recipe.output());
return OptionalDouble.empty();
}
var outputDivisor = (double) recipe.output().getCount();
return OptionalDouble.of((inputEmc - remainderEmc) / outputDivisor);
} catch (NoSuchElementException e) {
return OptionalDouble.empty();
}
}
private OptionalDouble calculateEmcForIngredient(
List<SimplifiedRecipe> recipes,
Set<ResourceLocation> configured,
Ingredient ingredient
) {
return Arrays.stream(ingredient.getItems())
.map(stack -> configEmc(recipes, configured, ItemUtils.getId(stack.getItem())).stream()
.map(x -> x * stack.getCount())
.findFirst())
.filter(OptionalDouble::isPresent)
.mapToDouble(OptionalDouble::getAsDouble)
.filter(x -> x > 0)
.average();
}
}
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