using System;
using UnityEngine;

[RequireComponent(typeof(Rigidbody), typeof(Collider), typeof(Damager))]
public abstract class AbstractProjectile : MonoBehaviour
{
    public static event Action<AbstractProjectile> OnSpawned;

    [SerializeField] protected ParticleSystem lifetimeVFX;
    [SerializeField] protected GameObject explosionSoundPrefab;
    [SerializeField] protected GameObject explosionVfxPrefab;

    protected Rigidbody rb;
    private Damager damager;
    public GameObject Owner { get; protected set; }
    protected virtual void Launch(GameObject owner, float damage)
    {
        damager = GetComponent<Damager>();
        rb = GetComponent<Rigidbody>();
        Owner = owner;
        damager.Initialize(owner, damage);
        damager.OnHit += ExplodeProjectile;

        OnSpawned?.Invoke(this);
    }

    public virtual void ExplodeProjectile()
    {
        if (explosionSoundPrefab != null)
            Instantiate(explosionSoundPrefab, transform.position, Quaternion.identity);
        if (explosionVfxPrefab != null)
            Instantiate(explosionVfxPrefab, transform.position, Quaternion.identity);

        DestroyProjectile();
    }

    public virtual void DestroyProjectile()
    {
        damager.OnHit -= DestroyProjectile;

        if (lifetimeVFX != null)
        {
            lifetimeVFX.transform.parent = null;
            lifetimeVFX.Stop();
            Destroy(lifetimeVFX.gameObject, 2);
        }

        Destroy(gameObject);
    }

    private void OnDestroy()
    {
        DestroyProjectile();
    }
}