using UnityEngine;

namespace BumpCombat.Defense
{
    [DisallowMultipleComponent]
    public sealed class DefenseSummonUnit : MonoBehaviour
    {
        private DefenseTower owner;
        private DefensePrototypeController controller;
        private Vector2 anchorLocalPosition;
        private SpriteRenderer spriteRenderer;
        private float attackCooldown;

        public void Configure(
            DefenseTower tower,
            DefensePrototypeController prototypeController,
            Vector2 localAnchor)
        {
            owner = tower;
            controller = prototypeController;
            anchorLocalPosition = localAnchor;
            spriteRenderer = gameObject.AddComponent<SpriteRenderer>();
            Sprite[] frames = Resources.LoadAll<Sprite>("Tutorial/Swordsman_Idle");
            if (frames != null && frames.Length > 0)
            {
                spriteRenderer.sprite = frames[0];
            }
            spriteRenderer.color = new Color32(255, 234, 137, 255);
            spriteRenderer.sortingOrder = 11;
            transform.localScale = new Vector3(0.9f, 0.9f, 1f);
        }

        private void Update()
        {
            if (owner == null
                || !owner.isActiveAndEnabled
                || controller == null
                || !controller.CanOperateTowers)
            {
                return;
            }

            attackCooldown = Mathf.Max(0f, attackCooldown - Time.deltaTime);
            DefenseRouteAgent target = controller.FindNearestTarget(
                transform.position,
                controller.Tuning.SummonAreaRadius,
                DefenseTowerKind.Summon);
            Vector2 anchor = owner.transform.TransformPoint(anchorLocalPosition);
            if (target == null)
            {
                transform.position = Vector2.MoveTowards(
                    transform.position,
                    anchor,
                    controller.Tuning.SummonUnitMoveSpeed * Time.deltaTime);
                return;
            }

            Vector2 targetPosition = target.transform.position;
            Vector2 fromAnchor = targetPosition - anchor;
            if (fromAnchor.magnitude > controller.Tuning.SummonAreaRadius)
            {
                targetPosition = anchor + fromAnchor.normalized * controller.Tuning.SummonAreaRadius;
            }

            transform.position = Vector2.MoveTowards(
                transform.position,
                targetPosition,
                controller.Tuning.SummonUnitMoveSpeed * Time.deltaTime);
            if (attackCooldown <= 0f
                && (target.transform.position - transform.position).sqrMagnitude <= controller.Tuning.SummonAttackRange * controller.Tuning.SummonAttackRange)
            {
                if (owner.TryAttack(target))
                {
                    attackCooldown = controller.Tuning.SummonAttackInterval;
                }
            }
        }
    }
}