package net.minecraft.world.level.levelgen.structure.structures;

import com.google.common.collect.Lists;
import com.mojang.serialization.MapCodec;
import java.util.List;
import java.util.Optional;
import net.minecraft.core.BlockPos;
import net.minecraft.world.level.block.Rotation;
import net.minecraft.world.level.levelgen.structure.Structure;
import net.minecraft.world.level.levelgen.structure.StructurePiece;
import net.minecraft.world.level.levelgen.structure.StructureType;
import net.minecraft.world.level.levelgen.structure.pieces.StructurePiecesBuilder;

public class EndCityStructure extends Structure {
	public static final MapCodec<EndCityStructure> CODEC = simpleCodec(EndCityStructure::new);

	public EndCityStructure(final Structure.StructureSettings settings) {
		super(settings);
	}

	@Override
	public Optional<Structure.GenerationStub> findGenerationPoint(final Structure.GenerationContext context) {
		Rotation rotation = Rotation.getRandom(context.random());
		BlockPos startPos = this.getLowestYIn5by5BoxOffset7Blocks(context, rotation);
		return startPos.getY() < 60
			? Optional.empty()
			: Optional.of(new Structure.GenerationStub(startPos, builder -> this.generatePieces(builder, startPos, rotation, context)));
	}

	private void generatePieces(final StructurePiecesBuilder builder, final BlockPos startPos, final Rotation rotation, final Structure.GenerationContext context) {
		List<StructurePiece> pieces = Lists.<StructurePiece>newArrayList();
		EndCityPieces.startHouseTower(context.structureTemplateManager(), startPos, rotation, pieces, context.random());
		pieces.forEach(builder::addPiece);
	}

	@Override
	public StructureType<?> type() {
		return StructureType.END_CITY;
	}
}