using UnityEngine;
using BaseGames.Combat;
using BaseGames.Core.Events;

namespace BaseGames.Boss
{
    /// <summary>
    /// 管理 Boss 的专属弱点 HurtBox（如核心、眼睛等）。
    /// 弱点激活期间受到的伤害会乘以 DamageMultiplier。
    /// </summary>
    public class WeakPointSystem : MonoBehaviour
    {
        [System.Serializable]
        public struct WeakPoint
        {
            public HurtBox    hurtBox;
            public GameObject visualIndicator;
        }

        [SerializeField] private WeakPoint[]            _weakPoints;
        [SerializeField] private string                 _bossId;
        [SerializeField] private StringEventChannelSO   _onVulnerabilityWindowOpened;

        private float _damageMultiplier = 1f;

        /// <summary>激活或关闭弱点 HurtBox 及视觉指示器。</summary>
        /// <param name="active">是否激活。</param>
        /// <param name="multiplier">激活时的受击伤害乘数。</param>
        /// <param name="activateSpecific">true = 仅激活弱点专属 HurtBox；false = 全身视为弱点（不改变 HurtBox 状态）。</param>
        public void SetActive(bool active, float multiplier = 1f, bool activateSpecific = false)
        {
            _damageMultiplier = active ? multiplier : 1f;

            if (activateSpecific)
            {
                foreach (var wp in _weakPoints)
                {
                    wp.hurtBox.gameObject.SetActive(active);
                    if (wp.visualIndicator != null)
                        wp.visualIndicator.SetActive(active);
                }
            }

            if (active)
                _onVulnerabilityWindowOpened?.Raise(_bossId);
        }

        /// <summary>弱点 HurtBox 受击时，由 BossStats 调用此方法获取最终伤害系数。</summary>
        public float GetDamageMultiplier() => _damageMultiplier;
    }
}