using System;
using UnityEngine;

public class AttatchBullet : BulletBase
{
    [SerializeField] GameObject bulletRoot;
    [SerializeField] GameObject attatchingEffect;

    public Transform Target { get; private set; }
    public bool IsAttaching { get; private set; }

    public Action OnAttatching;

    protected override bool UpdateBullet(float deltaTime)
    {
        if (Target is null) return false;

        Vector2 toTarget = Target.position - transform.position;

        if(!IsAttaching)
        {
            transform.position += (Vector3)toTarget.normalized * Speed * deltaTime;
            HeadDirection = toTarget;

            if(toTarget.sqrMagnitude <= 1f)
            {
                HeadDirection = Vector2.right;
                IsAttaching = true;

                bulletRoot.gameObject.SetActive(false);
                attatchingEffect?.gameObject.SetActive(true);
            }
        }
        else
        {
            transform.position = Target.position;
            OnAttatching?.Invoke();
        }

        return true;
    }

    public override void Fire(Transform target = null, bool resetLifeTime = true)
    {
        if (target is null) return;

        base.Fire(target, resetLifeTime);

        Target = target;
        IsAttaching = false;
        bulletRoot?.gameObject.SetActive(true);
        attatchingEffect?.gameObject.SetActive(false);
    }
}