package net.minecraft.world.item.enchantment.providers;

import com.mojang.serialization.MapCodec;
import com.mojang.serialization.codecs.RecordCodecBuilder;
import com.mojang.serialization.codecs.RecordCodecBuilder.Instance;
import net.minecraft.core.HolderSet;
import net.minecraft.core.RegistryCodecs;
import net.minecraft.core.registries.Registries;
import net.minecraft.util.ExtraCodecs;
import net.minecraft.util.Mth;
import net.minecraft.util.RandomSource;
import net.minecraft.world.DifficultyInstance;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.enchantment.Enchantment;
import net.minecraft.world.item.enchantment.EnchantmentHelper;
import net.minecraft.world.item.enchantment.EnchantmentInstance;
import net.minecraft.world.item.enchantment.ItemEnchantments;

public record EnchantmentsByCostWithDifficulty(HolderSet<Enchantment> enchantments, int minCost, int maxCostSpan) implements EnchantmentProvider {
    public static final int MAX_ALLOWED_VALUE_PART = 10000;
    public static final MapCodec<EnchantmentsByCostWithDifficulty> CODEC = RecordCodecBuilder.mapCodec(
        p_342284_ -> p_342284_.group(
                RegistryCodecs.homogeneousList(Registries.ENCHANTMENT).fieldOf("enchantments").forGetter(EnchantmentsByCostWithDifficulty::enchantments),
                ExtraCodecs.intRange(1, 10000).fieldOf("min_cost").forGetter(EnchantmentsByCostWithDifficulty::minCost),
                ExtraCodecs.intRange(0, 10000).fieldOf("max_cost_span").forGetter(EnchantmentsByCostWithDifficulty::maxCostSpan)
            )
            .apply(p_342284_, EnchantmentsByCostWithDifficulty::new)
    );

    @Override
    public void enchant(ItemStack p_344973_, ItemEnchantments.Mutable p_344834_, RandomSource p_343505_, DifficultyInstance p_342467_) {
        float f = p_342467_.getSpecialMultiplier();
        int i = Mth.randomBetweenInclusive(p_343505_, this.minCost, this.minCost + (int)(f * this.maxCostSpan));

        for (EnchantmentInstance enchantmentinstance : EnchantmentHelper.selectEnchantment(p_343505_, p_344973_, i, this.enchantments.stream())) {
            p_344834_.upgrade(enchantmentinstance.enchantment(), enchantmentinstance.level());
        }
    }

    @Override
    public MapCodec<EnchantmentsByCostWithDifficulty> codec() {
        return CODEC;
    }
}