package net.minecraft.world.entity.animal.camel;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.mojang.datafixers.util.Pair;
import java.util.function.Predicate;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.tags.ItemTags;
import net.minecraft.util.RandomSource;
import net.minecraft.util.valueproviders.UniformInt;
import net.minecraft.world.entity.EntityType;
import net.minecraft.world.entity.ai.Brain;
import net.minecraft.world.entity.ai.behavior.AnimalMakeLove;
import net.minecraft.world.entity.ai.behavior.AnimalPanic;
import net.minecraft.world.entity.ai.behavior.BabyFollowAdult;
import net.minecraft.world.entity.ai.behavior.Behavior;
import net.minecraft.world.entity.ai.behavior.CountDownCooldownTicks;
import net.minecraft.world.entity.ai.behavior.DoNothing;
import net.minecraft.world.entity.ai.behavior.FollowTemptation;
import net.minecraft.world.entity.ai.behavior.LookAtTargetSink;
import net.minecraft.world.entity.ai.behavior.MoveToTargetSink;
import net.minecraft.world.entity.ai.behavior.RandomLookAround;
import net.minecraft.world.entity.ai.behavior.RandomStroll;
import net.minecraft.world.entity.ai.behavior.RunOne;
import net.minecraft.world.entity.ai.behavior.SetEntityLookTargetSometimes;
import net.minecraft.world.entity.ai.behavior.SetWalkTargetFromLookTarget;
import net.minecraft.world.entity.ai.behavior.Swim;
import net.minecraft.world.entity.ai.behavior.declarative.BehaviorBuilder;
import net.minecraft.world.entity.ai.memory.MemoryModuleType;
import net.minecraft.world.entity.ai.memory.MemoryStatus;
import net.minecraft.world.entity.ai.sensing.Sensor;
import net.minecraft.world.entity.ai.sensing.SensorType;
import net.minecraft.world.entity.schedule.Activity;
import net.minecraft.world.item.ItemStack;

public class CamelAi {
	private static final float SPEED_MULTIPLIER_WHEN_PANICKING = 4.0F;
	private static final float SPEED_MULTIPLIER_WHEN_IDLING = 2.0F;
	private static final float SPEED_MULTIPLIER_WHEN_TEMPTED = 2.5F;
	private static final float SPEED_MULTIPLIER_WHEN_FOLLOWING_ADULT = 2.5F;
	private static final float SPEED_MULTIPLIER_WHEN_MAKING_LOVE = 1.0F;
	private static final UniformInt ADULT_FOLLOW_RANGE = UniformInt.of(5, 16);
	private static final ImmutableList<SensorType<? extends Sensor<? super Camel>>> SENSOR_TYPES = ImmutableList.of(
		SensorType.NEAREST_LIVING_ENTITIES, SensorType.HURT_BY, SensorType.CAMEL_TEMPTATIONS, SensorType.NEAREST_ADULT
	);
	private static final ImmutableList<MemoryModuleType<?>> MEMORY_TYPES = ImmutableList.of(
		MemoryModuleType.IS_PANICKING,
		MemoryModuleType.HURT_BY,
		MemoryModuleType.HURT_BY_ENTITY,
		MemoryModuleType.WALK_TARGET,
		MemoryModuleType.LOOK_TARGET,
		MemoryModuleType.CANT_REACH_WALK_TARGET_SINCE,
		MemoryModuleType.PATH,
		MemoryModuleType.NEAREST_VISIBLE_LIVING_ENTITIES,
		MemoryModuleType.TEMPTING_PLAYER,
		MemoryModuleType.TEMPTATION_COOLDOWN_TICKS,
		MemoryModuleType.GAZE_COOLDOWN_TICKS,
		MemoryModuleType.IS_TEMPTED,
		MemoryModuleType.BREED_TARGET,
		MemoryModuleType.NEAREST_VISIBLE_ADULT
	);

	protected static void initMemories(Camel camel, RandomSource random) {
	}

	public static Brain.Provider<Camel> brainProvider() {
		return Brain.provider(MEMORY_TYPES, SENSOR_TYPES);
	}

	protected static Brain<?> makeBrain(Brain<Camel> brain) {
		initCoreActivity(brain);
		initIdleActivity(brain);
		brain.setCoreActivities(ImmutableSet.of(Activity.CORE));
		brain.setDefaultActivity(Activity.IDLE);
		brain.useDefaultActivity();
		return brain;
	}

	private static void initCoreActivity(Brain<Camel> brain) {
		brain.addActivity(
			Activity.CORE,
			0,
			ImmutableList.of(
				new Swim(0.8F),
				new CamelAi.CamelPanic(4.0F),
				new LookAtTargetSink(45, 90),
				new MoveToTargetSink(),
				new CountDownCooldownTicks(MemoryModuleType.TEMPTATION_COOLDOWN_TICKS),
				new CountDownCooldownTicks(MemoryModuleType.GAZE_COOLDOWN_TICKS)
			)
		);
	}

	private static void initIdleActivity(Brain<Camel> brain) {
		brain.addActivity(
			Activity.IDLE,
			ImmutableList.of(
				Pair.of(0, SetEntityLookTargetSometimes.create(EntityType.PLAYER, 6.0F, UniformInt.of(30, 60))),
				Pair.of(1, new AnimalMakeLove(EntityType.CAMEL)),
				Pair.of(
					2,
					new RunOne<>(
						ImmutableList.of(
							Pair.of(new FollowTemptation(livingEntity -> 2.5F, livingEntity -> livingEntity.isBaby() ? 2.5 : 3.5), 1),
							Pair.of(BehaviorBuilder.triggerIf(Predicate.not(Camel::refuseToMove), BabyFollowAdult.create(ADULT_FOLLOW_RANGE, 2.5F)), 1)
						)
					)
				),
				Pair.of(3, new RandomLookAround(UniformInt.of(150, 250), 30.0F, 0.0F, 0.0F)),
				Pair.of(
					4,
					new RunOne<>(
						ImmutableMap.of(MemoryModuleType.WALK_TARGET, MemoryStatus.VALUE_ABSENT),
						ImmutableList.of(
							Pair.of(BehaviorBuilder.triggerIf(Predicate.not(Camel::refuseToMove), RandomStroll.stroll(2.0F)), 1),
							Pair.of(BehaviorBuilder.triggerIf(Predicate.not(Camel::refuseToMove), SetWalkTargetFromLookTarget.create(2.0F, 3)), 1),
							Pair.of(new CamelAi.RandomSitting(20), 1),
							Pair.of(new DoNothing(30, 60), 1)
						)
					)
				)
			)
		);
	}

	public static void updateActivity(Camel camel) {
		camel.getBrain().setActiveActivityToFirstValid(ImmutableList.of(Activity.IDLE));
	}

	public static Predicate<ItemStack> getTemptations() {
		return itemStack -> itemStack.is(ItemTags.CAMEL_FOOD);
	}

	public static class CamelPanic extends AnimalPanic<Camel> {
		public CamelPanic(float f) {
			super(f);
		}

		protected void start(ServerLevel serverLevel, Camel camel, long l) {
			camel.standUpInstantly();
			super.start(serverLevel, camel, l);
		}
	}

	public static class RandomSitting extends Behavior<Camel> {
		private final int minimalPoseTicks;

		public RandomSitting(int minimalPoseSeconds) {
			super(ImmutableMap.of());
			this.minimalPoseTicks = minimalPoseSeconds * 20;
		}

		protected boolean checkExtraStartConditions(ServerLevel level, Camel owner) {
			return !owner.isInWater()
				&& owner.getPoseTime() >= this.minimalPoseTicks
				&& !owner.isLeashed()
				&& owner.onGround()
				&& !owner.hasControllingPassenger()
				&& owner.canCamelChangePose();
		}

		protected void start(ServerLevel level, Camel entity, long gameTime) {
			if (entity.isCamelSitting()) {
				entity.standUp();
			} else if (!entity.isPanicking()) {
				entity.sitDown();
			}
		}
	}
}