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

import com.google.common.collect.ImmutableMap;
import java.util.Optional;
import net.minecraft.core.BlockPos;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.tags.BlockTags;
import net.minecraft.world.entity.Mob;
import net.minecraft.world.entity.ai.memory.MemoryModuleType;
import net.minecraft.world.entity.ai.memory.MemoryStatus;
import net.minecraft.world.entity.ai.memory.WalkTarget;
import org.jetbrains.annotations.Nullable;

public class JumpOnBed extends Behavior<Mob> {
	private static final int MAX_TIME_TO_REACH_BED = 100;
	private static final int MIN_JUMPS = 3;
	private static final int MAX_JUMPS = 6;
	private static final int COOLDOWN_BETWEEN_JUMPS = 5;
	private final float speedModifier;
	@Nullable
	private BlockPos targetBed;
	private int remainingTimeToReachBed;
	private int remainingJumps;
	private int remainingCooldownUntilNextJump;

	public JumpOnBed(float speedModifier) {
		super(ImmutableMap.of(MemoryModuleType.NEAREST_BED, MemoryStatus.VALUE_PRESENT, MemoryModuleType.WALK_TARGET, MemoryStatus.VALUE_ABSENT));
		this.speedModifier = speedModifier;
	}

	protected boolean checkExtraStartConditions(ServerLevel level, Mob owner) {
		return owner.isBaby() && this.nearBed(level, owner);
	}

	protected void start(ServerLevel level, Mob entity, long gameTime) {
		super.start(level, entity, gameTime);
		this.getNearestBed(entity).ifPresent(blockPos -> {
			this.targetBed = blockPos;
			this.remainingTimeToReachBed = 100;
			this.remainingJumps = 3 + level.random.nextInt(4);
			this.remainingCooldownUntilNextJump = 0;
			this.startWalkingTowardsBed(entity, blockPos);
		});
	}

	protected void stop(ServerLevel level, Mob entity, long gameTime) {
		super.stop(level, entity, gameTime);
		this.targetBed = null;
		this.remainingTimeToReachBed = 0;
		this.remainingJumps = 0;
		this.remainingCooldownUntilNextJump = 0;
	}

	protected boolean canStillUse(ServerLevel level, Mob entity, long gameTime) {
		return entity.isBaby()
			&& this.targetBed != null
			&& this.isBed(level, this.targetBed)
			&& !this.tiredOfWalking(level, entity)
			&& !this.tiredOfJumping(level, entity);
	}

	@Override
	protected boolean timedOut(long gameTime) {
		return false;
	}

	protected void tick(ServerLevel level, Mob owner, long gameTime) {
		if (!this.onOrOverBed(level, owner)) {
			this.remainingTimeToReachBed--;
		} else if (this.remainingCooldownUntilNextJump > 0) {
			this.remainingCooldownUntilNextJump--;
		} else {
			if (this.onBedSurface(level, owner)) {
				owner.getJumpControl().jump();
				this.remainingJumps--;
				this.remainingCooldownUntilNextJump = 5;
			}
		}
	}

	private void startWalkingTowardsBed(Mob mob, BlockPos pos) {
		mob.getBrain().setMemory(MemoryModuleType.WALK_TARGET, new WalkTarget(pos, this.speedModifier, 0));
	}

	private boolean nearBed(ServerLevel level, Mob mob) {
		return this.onOrOverBed(level, mob) || this.getNearestBed(mob).isPresent();
	}

	private boolean onOrOverBed(ServerLevel level, Mob mob) {
		BlockPos blockPos = mob.blockPosition();
		BlockPos blockPos2 = blockPos.below();
		return this.isBed(level, blockPos) || this.isBed(level, blockPos2);
	}

	private boolean onBedSurface(ServerLevel level, Mob mob) {
		return this.isBed(level, mob.blockPosition());
	}

	private boolean isBed(ServerLevel level, BlockPos pos) {
		return level.getBlockState(pos).is(BlockTags.BEDS);
	}

	private Optional<BlockPos> getNearestBed(Mob mob) {
		return mob.getBrain().getMemory(MemoryModuleType.NEAREST_BED);
	}

	private boolean tiredOfWalking(ServerLevel level, Mob mob) {
		return !this.onOrOverBed(level, mob) && this.remainingTimeToReachBed <= 0;
	}

	private boolean tiredOfJumping(ServerLevel level, Mob mob) {
		return this.onOrOverBed(level, mob) && this.remainingJumps <= 0;
	}
}