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;

        // Get player camera (from FPS controller or fallback to Camera.main)
        Camera cam = null;
        if (Polyart.FirstPersonController.instance)
            cam = Polyart.FirstPersonController.instance.GetComponentInChildren<Camera>();
        if (!cam) cam = Camera.main;

        // Start slightly in front of the cast position
        Vector3 castPos = user.CastPos() + user.Forward() * spawnOffset;

        // Default direction if no camera found
        Vector3 dir = user.Forward();

        if (cam)
        {
            // Ray from camera forward
            Ray ray = new Ray(cam.transform.position, cam.transform.forward);

            Vector3 targetPoint;
            if (Physics.Raycast(ray, out RaycastHit hit, 1000f, ~0, QueryTriggerInteraction.Ignore))
                targetPoint = hit.point;
            else
                targetPoint = ray.origin + ray.direction * 1000f;

            dir = (targetPoint - castPos).normalized;
        }

        // Spawn projectile oriented to camera direction
        var go = Instantiate(projectilePrefab, castPos, Quaternion.LookRotation(dir));

        // Push it forward
        var rb = go.GetComponent<Rigidbody>();
        if (rb) rb.velocity = dir * speed;

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

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

        Destroy(go, lifeTime);
    }

}