using System;

using Colosseum.Combat;

using Unity.Behavior;
using UnityEngine;

using Action = Unity.Behavior.Action;
using Unity.Properties;

[Serializable, GeneratePropertyBag]
[NodeDescription(name: "RotateToTarget", story: "[대상을] 바라보도록 회전", category: "Action", id: "30341f7e1af0565c0aca0253341b3e28")]
public partial class RotateToTargetAction : Action
{
    [SerializeReference]
    public BlackboardVariable<GameObject> Target;

    [SerializeReference]
    public BlackboardVariable<float> RotationSpeed = new BlackboardVariable<float>(10f);

    [SerializeReference]
    public BlackboardVariable<float> AngleThreshold = new BlackboardVariable<float>(5f);

    protected override Status OnUpdate()
    {
        if (Target.Value == null)
        {
            return Status.Failure;
        }

        Vector3 direction = TargetSurfaceUtility.GetHorizontalDirectionToSurface(GameObject.transform.position, Target.Value);

        if (direction == Vector3.zero)
        {
            return Status.Success;
        }

        Quaternion targetRotation = Quaternion.LookRotation(direction);
        float angleDifference = Quaternion.Angle(GameObject.transform.rotation, targetRotation);

        // 임계값 이내면 성공
        if (angleDifference <= AngleThreshold.Value)
        {
            return Status.Success;
        }

        // 부드럽게 회전
        GameObject.transform.rotation = Quaternion.Slerp(
            GameObject.transform.rotation,
            targetRotation,
            RotationSpeed.Value * Time.deltaTime
        );

        return Status.Running;
    }
}