using UnityEngine;

// 敵のコントローラー 攻撃対象を追跡し、攻撃する
public class EnemyController : MonoBehaviour
{
    [SerializeField] private CharacterAttack characterAttack;
    [SerializeField] private float searchRadius = 30f;
    [SerializeField] private float moveSpeed = 3f;
    [SerializeField] private float attackDistance = 1.5f;
    [SerializeField] private float attackInterval = 1.0f;
    [SerializeField] private float rotateSpeed = 10f;

    private AttackTarget _target;
    private float _lastAttackTime = -999f;
    private void Update()
    {
        if (_target == null)
            _target = FindNearestTarget();

        if (_target == null)
            return;

        if (characterAttack.IsAttacking)
            return;

        var toTarget =
            _target.transform.position - transform.position;

        toTarget.y = 0f;

        if (toTarget.magnitude <= attackDistance)
        {
            TryAttack();
            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 void TryAttack()
    {
        if (Time.time < _lastAttackTime + attackInterval)
            return;

        characterAttack.Attack();
        _lastAttackTime = Time.time;
    }
    private AttackTarget FindNearestTarget()
    {
        var targets = FindObjectsByType<AttackTarget>(FindObjectsSortMode.None);
        AttackTarget nearest = null;
        var nearestDistance = searchRadius;

        foreach (var target in targets)
        {
            var distance = Vector3.Distance(
                transform.position,
                target.transform.position);

            if (distance >= nearestDistance)
                continue;

            nearest = target;
            nearestDistance = distance;
        }

        return nearest;
    }
}