package net.minecraft.util.datafix.fixes;

import com.mojang.datafixers.DataFix;
import com.mojang.datafixers.OpticFinder;
import com.mojang.datafixers.TypeRewriteRule;
import com.mojang.datafixers.Typed;
import com.mojang.datafixers.schemas.Schema;
import com.mojang.datafixers.types.Type;
import com.mojang.datafixers.util.Pair;
import com.mojang.serialization.Dynamic;
import com.mojang.serialization.DynamicOps;
import java.util.List;

public class SpawnerDataFix extends DataFix {
    public SpawnerDataFix(Schema p_185133_) {
        super(p_185133_, true);
    }

    @Override
    protected TypeRewriteRule makeRule() {
        Type<?> type = this.getInputSchema().getType(References.UNTAGGED_SPAWNER);
        Type<?> type1 = this.getOutputSchema().getType(References.UNTAGGED_SPAWNER);
        OpticFinder<?> opticfinder = type.findField("SpawnData");
        Type<?> type2 = type1.findField("SpawnData").type();
        OpticFinder<?> opticfinder1 = type.findField("SpawnPotentials");
        Type<?> type3 = type1.findField("SpawnPotentials").type();
        return this.fixTypeEverywhereTyped(
            "Fix mob spawner data structure",
            type,
            type1,
            p_185139_ -> p_185139_.updateTyped(opticfinder, type2, p_185154_ -> this.wrapEntityToSpawnData(type2, p_185154_))
                .updateTyped(opticfinder1, type3, p_185151_ -> this.wrapSpawnPotentialsToWeightedEntries(type3, p_185151_))
        );
    }

    private <T> Typed<T> wrapEntityToSpawnData(Type<T> p_185141_, Typed<?> p_185142_) {
        DynamicOps<?> dynamicops = p_185142_.getOps();
        return new Typed<>(p_185141_, dynamicops, (T)Pair.<Object, Dynamic<?>>of(p_185142_.getValue(), new Dynamic<>(dynamicops)));
    }

    private <T> Typed<T> wrapSpawnPotentialsToWeightedEntries(Type<T> p_185147_, Typed<?> p_185148_) {
        DynamicOps<?> dynamicops = p_185148_.getOps();
        List<?> list = (List<?>)p_185148_.getValue();
        List<?> list1 = list.stream().map(p_185145_ -> {
            Pair<Object, Dynamic<?>> pair = (Pair<Object, Dynamic<?>>)p_185145_;
            int i = pair.getSecond().get("Weight").asNumber().result().orElse(1).intValue();
            Dynamic<?> dynamic = new Dynamic<>(dynamicops);
            dynamic = dynamic.set("weight", dynamic.createInt(i));
            Dynamic<?> dynamic1 = pair.getSecond().remove("Weight").remove("Entity");
            return Pair.of(Pair.of(pair.getFirst(), dynamic1), dynamic);
        }).toList();
        return new Typed<>(p_185147_, dynamicops, (T)list1);
    }
}