package net.minecraft.world.entity.npc;

import com.mojang.serialization.Codec;
import com.mojang.serialization.codecs.RecordCodecBuilder;
import net.minecraft.core.Holder;
import net.minecraft.core.HolderGetter;
import net.minecraft.core.registries.BuiltInRegistries;
import net.minecraft.core.registries.Registries;
import net.minecraft.network.RegistryFriendlyByteBuf;
import net.minecraft.network.codec.ByteBufCodecs;
import net.minecraft.network.codec.StreamCodec;
import net.minecraft.resources.ResourceKey;

public record VillagerData(Holder<VillagerType> type, Holder<VillagerProfession> profession, int level) {
	public static final int MIN_VILLAGER_LEVEL = 1;
	public static final int MAX_VILLAGER_LEVEL = 5;
	private static final int[] NEXT_LEVEL_XP_THRESHOLDS = new int[]{0, 10, 70, 150, 250};
	public static final Codec<VillagerData> CODEC = RecordCodecBuilder.create(
		instance -> instance.group(
				BuiltInRegistries.VILLAGER_TYPE
					.holderByNameCodec()
					.fieldOf("type")
					.orElseGet(() -> BuiltInRegistries.VILLAGER_TYPE.getOrThrow(VillagerType.PLAINS))
					.forGetter(villagerData -> villagerData.type),
				BuiltInRegistries.VILLAGER_PROFESSION
					.holderByNameCodec()
					.fieldOf("profession")
					.orElseGet(() -> BuiltInRegistries.VILLAGER_PROFESSION.getOrThrow(VillagerProfession.NONE))
					.forGetter(villagerData -> villagerData.profession),
				Codec.INT.fieldOf("level").orElse(1).forGetter(villagerData -> villagerData.level)
			)
			.apply(instance, VillagerData::new)
	);
	public static final StreamCodec<RegistryFriendlyByteBuf, VillagerData> STREAM_CODEC = StreamCodec.composite(
		ByteBufCodecs.holderRegistry(Registries.VILLAGER_TYPE),
		VillagerData::type,
		ByteBufCodecs.holderRegistry(Registries.VILLAGER_PROFESSION),
		VillagerData::profession,
		ByteBufCodecs.VAR_INT,
		VillagerData::level,
		VillagerData::new
	);

	public VillagerData(Holder<VillagerType> type, Holder<VillagerProfession> profession, int level) {
		level = Math.max(1, level);
		this.type = type;
		this.profession = profession;
		this.level = level;
	}

	public VillagerData withType(Holder<VillagerType> type) {
		return new VillagerData(type, this.profession, this.level);
	}

	public VillagerData withType(HolderGetter.Provider registries, ResourceKey<VillagerType> type) {
		return this.withType(registries.getOrThrow(type));
	}

	public VillagerData withProfession(Holder<VillagerProfession> profession) {
		return new VillagerData(this.type, profession, this.level);
	}

	public VillagerData withProfession(HolderGetter.Provider registries, ResourceKey<VillagerProfession> profession) {
		return this.withProfession(registries.getOrThrow(profession));
	}

	public VillagerData withLevel(int level) {
		return new VillagerData(this.type, this.profession, level);
	}

	public static int getMinXpPerLevel(int level) {
		return canLevelUp(level) ? NEXT_LEVEL_XP_THRESHOLDS[level - 1] : 0;
	}

	public static int getMaxXpPerLevel(int level) {
		return canLevelUp(level) ? NEXT_LEVEL_XP_THRESHOLDS[level] : 0;
	}

	public static boolean canLevelUp(int level) {
		return level >= 1 && level < 5;
	}
}