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(final int range, final float speedModifier) {
		MutableLong nextOkStartTime = new MutableLong(0L);
		return BehaviorBuilder.create(
			i -> i.group(i.absent(MemoryModuleType.ATTACK_TARGET), i.absent(MemoryModuleType.WALK_TARGET), i.registered(MemoryModuleType.LOOK_TARGET))
				.apply(
					i,
					(attackTarget, walkTarget, lookTarget) -> (level, body, timestamp) -> {
						if (level.getFluidState(body.blockPosition()).is(FluidTags.WATER)) {
							return false;
						} else if (timestamp < nextOkStartTime.longValue()) {
							nextOkStartTime.setValue(timestamp + 40L);
							return true;
						} else {
							CollisionContext context = CollisionContext.of(body);
							BlockPos bodyBlockPos = body.blockPosition();
							BlockPos.MutableBlockPos testPos = new BlockPos.MutableBlockPos();

							label45:
							for (BlockPos pos : BlockPos.withinManhattan(bodyBlockPos, range, range, range)) {
								if ((pos.getX() != bodyBlockPos.getX() || pos.getZ() != bodyBlockPos.getZ())
									&& level.getBlockState(pos).getCollisionShape(level, pos, context).isEmpty()
									&& !level.getBlockState(testPos.setWithOffset(pos, Direction.DOWN)).getCollisionShape(level, pos, context).isEmpty()) {
									for (Direction direction : Direction.Plane.HORIZONTAL) {
										testPos.setWithOffset(pos, direction);
										if (level.getBlockState(testPos).isAir() && level.getBlockState(testPos.move(Direction.DOWN)).is(Blocks.WATER)) {
											lookTarget.set(new BlockPosTracker(pos));
											walkTarget.set(new WalkTarget(new BlockPosTracker(pos), speedModifier, 0));
											break label45;
										}
									}
								}
							}

							nextOkStartTime.setValue(timestamp + 40L);
							return true;
						}
					}
				)
		);
	}
}