package net.minecraft.world.level.block.state.predicate;

import com.google.common.collect.Maps;
import java.util.Map;
import java.util.Map.Entry;
import java.util.function.Predicate;
import net.minecraft.world.level.block.Block;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.level.block.state.StateDefinition;
import net.minecraft.world.level.block.state.properties.Property;
import org.jetbrains.annotations.Nullable;

public class BlockStatePredicate implements Predicate<BlockState> {
	public static final Predicate<BlockState> ANY = blockState -> true;
	private final StateDefinition<Block, BlockState> definition;
	private final Map<Property<?>, Predicate<Object>> properties = Maps.<Property<?>, Predicate<Object>>newHashMap();

	private BlockStatePredicate(StateDefinition<Block, BlockState> definition) {
		this.definition = definition;
	}

	public static BlockStatePredicate forBlock(Block block) {
		return new BlockStatePredicate(block.getStateDefinition());
	}

	public boolean test(@Nullable BlockState state) {
		if (state != null && state.getBlock().equals(this.definition.getOwner())) {
			if (this.properties.isEmpty()) {
				return true;
			} else {
				for (Entry<Property<?>, Predicate<Object>> entry : this.properties.entrySet()) {
					if (!this.applies(state, (Property)entry.getKey(), (Predicate<Object>)entry.getValue())) {
						return false;
					}
				}

				return true;
			}
		} else {
			return false;
		}
	}

	protected <T extends Comparable<T>> boolean applies(BlockState state, Property<T> property, Predicate<Object> valuePredicate) {
		T comparable = state.getValue(property);
		return valuePredicate.test(comparable);
	}

	public <V extends Comparable<V>> BlockStatePredicate where(Property<V> property, Predicate<Object> valuePredicate) {
		if (!this.definition.getProperties().contains(property)) {
			throw new IllegalArgumentException(this.definition + " cannot support property " + property);
		} else {
			this.properties.put(property, valuePredicate);
			return this;
		}
	}
}