using UnityEngine;

[CreateAssetMenu(menuName = "Abilities/Freeze Shard")]
public class FreezeShardAbility : Ability
{
    public GameObject projectilePrefab;
    public float speed = 20f;
    public float damage = 0f; // optional direct damage
    public float freezeDuration = 3f;
    public float lifeTime = 4f;
    public float spawnOffset = 0.5f;

    public override void Activate(AbilityUser user)
    {
        if (!user || !projectilePrefab) return;

        var pos = user.CastPos() + user.Forward() * spawnOffset;
        var rot = Quaternion.LookRotation(user.Forward());
        var go = Instantiate(projectilePrefab, pos, rot);

        var rb = go.GetComponent<Rigidbody>();
        if (rb) rb.velocity = user.Forward() * speed;

        var shard = go.GetComponent<FreezeShardProjectile>();
        if (!shard) shard = go.AddComponent<FreezeShardProjectile>();
        shard.damage = damage;
        shard.freezeDuration = freezeDuration;
        shard.ownerRoot = user.transform;

        var projCol = go.GetComponent<Collider>();
        if (projCol)
        {
            foreach (var oc in user.GetComponentsInChildren<Collider>())
                Physics.IgnoreCollision(projCol, oc, true);
        }

        Destroy(go, lifeTime);
    }
}