using UnityEngine;

public class IVMateChasePlayer : State<IVMate>
{
    IVCharacter player;

    float pow2MinDistToPlayer;

    public void Setup(IVCharacter player)
    {
        this.player = player;
        pow2MinDistToPlayer = GameProperty.Instance.DistRangeMateToPlayer.x * GameProperty.Instance.DistRangeMateToPlayer.x;
    }

    public override void Enter()
    {
        Debug.Assert(Owner.Excutor.SkeletonAnimation != null && Owner.Excutor.SkeletonAnimation.TryGetAnimation("move", out Spine.Animation _), "SkeletonAnimation is null or move animation not exist");
        Owner.Excutor.SkeletonAnimation.AnimationState.SetAnimation(0, "move", true);
    }

    public override void Excute()
    {
        if(IsPlayerTooNear())
        {
            Owner.ChangeState<IVMateIdle>();
        }
        else
        {
            Vector2 dir = player.transform.position - Owner.Excutor.transform.position;
            dir.Normalize();

            Vector3 newPosition = (Vector2)Owner.Excutor.transform.position + (dir * Owner.Excutor.Data.DefaultMoveSpeed * Time.unscaledDeltaTime);
            newPosition.z = Owner.Excutor.transform.position.z;

            Owner.Excutor.transform.position = newPosition;
            Owner.Excutor.ChangeLookDirection(player.transform);
        }
    }

    bool IsPlayerTooNear()
    {
        float sqrtDist = Vector2.SqrMagnitude(Owner.Excutor.transform.position - player.transform.position);
        return sqrtDist <= pow2MinDistToPlayer;
    }
}