using UnityEngine;

public class EnemyController : MonoBehaviour
{
    [SerializeField] private float searchRadius = 30f;
    [SerializeField] private float moveSpeed = 3f;
    [SerializeField] private float stopDistance = 1.2f;
    [SerializeField] private float rotateSpeed = 10f;

    private AttackTarget target;

    private void Update()
    {
        if (target == null)
        {
            target = FindNearestTarget();
        }

        if (target == null)
        {
            return;
        }

        var toTarget = target.transform.position - transform.position;
        toTarget.y = 0f;

        if (toTarget.magnitude <= stopDistance)
        {
            return;
        }

        var direction = toTarget.normalized;
        transform.position += direction * moveSpeed * Time.deltaTime;

        var targetRotation = Quaternion.LookRotation(direction);
        transform.rotation = Quaternion.Slerp(transform.rotation, targetRotation, rotateSpeed * Time.deltaTime);
    }

    private AttackTarget FindNearestTarget()
    {
        var targets = FindObjectsByType<AttackTarget>();
        AttackTarget nearest = null;
        var nearestDistance = searchRadius;

        foreach (var attackTarget in targets)
        {
            var distance = Vector3.Distance(transform.position, attackTarget.transform.position);
            if (distance >= nearestDistance)
            {
                continue;
            }

            nearest = attackTarget;
            nearestDistance = distance;
        }

        return nearest;
    }
}