package net.minecraft.world.entity.ai.behavior;

import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.tags.FluidTags;
import net.minecraft.world.entity.PathfinderMob;
import net.minecraft.world.entity.ai.behavior.declarative.BehaviorBuilder;
import net.minecraft.world.entity.ai.memory.MemoryModuleType;
import net.minecraft.world.entity.ai.memory.WalkTarget;
import net.minecraft.world.level.block.Blocks;
import net.minecraft.world.phys.shapes.CollisionContext;
import org.apache.commons.lang3.mutable.MutableLong;

public class TryFindLandNearWater {
	public static BehaviorControl<PathfinderMob> create(int range, float speedModifier) {
		MutableLong mutableLong = new MutableLong(0L);
		return BehaviorBuilder.create(
			instance -> instance.group(
					instance.absent(MemoryModuleType.ATTACK_TARGET), instance.absent(MemoryModuleType.WALK_TARGET), instance.registered(MemoryModuleType.LOOK_TARGET)
				)
				.apply(
					instance,
					(memoryAccessor, memoryAccessor2, memoryAccessor3) -> (serverLevel, pathfinderMob, l) -> {
						if (serverLevel.getFluidState(pathfinderMob.blockPosition()).is(FluidTags.WATER)) {
							return false;
						} else if (l < mutableLong.getValue()) {
							mutableLong.setValue(l + 40L);
							return true;
						} else {
							CollisionContext collisionContext = CollisionContext.of(pathfinderMob);
							BlockPos blockPos = pathfinderMob.blockPosition();
							BlockPos.MutableBlockPos mutableBlockPos = new BlockPos.MutableBlockPos();

							label45:
							for (BlockPos blockPos2 : BlockPos.withinManhattan(blockPos, range, range, range)) {
								if ((blockPos2.getX() != blockPos.getX() || blockPos2.getZ() != blockPos.getZ())
									&& serverLevel.getBlockState(blockPos2).getCollisionShape(serverLevel, blockPos2, collisionContext).isEmpty()
									&& !serverLevel.getBlockState(mutableBlockPos.setWithOffset(blockPos2, Direction.DOWN))
										.getCollisionShape(serverLevel, blockPos2, collisionContext)
										.isEmpty()) {
									for (Direction direction : Direction.Plane.HORIZONTAL) {
										mutableBlockPos.setWithOffset(blockPos2, direction);
										if (serverLevel.getBlockState(mutableBlockPos).isAir() && serverLevel.getBlockState(mutableBlockPos.move(Direction.DOWN)).is(Blocks.WATER)) {
											memoryAccessor3.set(new BlockPosTracker(blockPos2));
											memoryAccessor2.set(new WalkTarget(new BlockPosTracker(blockPos2), speedModifier, 0));
											break label45;
										}
									}
								}
							}

							mutableLong.setValue(l + 40L);
							return true;
						}
					}
				)
		);
	}
}