using UnityEngine;

namespace BrewMonster
{
    /// <summary>
    /// Link movement (lightning chain - minimal movement, updates GFX params).
    /// Mirrors C++ CGfxLinkMove exactly (A3DSkillGfxEvent2.cpp:324-356).
    /// 链接移动（闪电链 - 最小移动，更新GFX参数），完全镜像C++ CGfxLinkMove。
    /// </summary>
    public class CGfxLinkMove : CGfxMoveBase
    {
        public CGfxLinkMove(GfxMoveMode mode) : base(mode) { }

        /// <summary>
        /// Initialize link movement (just sets position and direction).
        /// 初始化链接移动（仅设置位置和方向）。
        /// </summary>
        public override void StartMove(Vector3 vHost, Vector3 vTarget)
        {
            m_vPos = vHost;
            Vector3 vDir = vTarget - vHost;
            m_vMoveDir = vDir.normalized;
        }

        /// <summary>
        /// Tick link movement (always returns false - hit triggered by timeout).
        /// 更新链接移动（始终返回false - 命中由超时触发）。
        /// </summary>
        public override bool TickMove(uint dwDeltaTime, Vector3 vHostPos, Vector3 vTargetPos)
        {
            // Link movement doesn't actually move - it's handled by UpdateGfxParam
            // 链接移动实际上不移动 - 由UpdateGfxParam处理
            return false;
        }

        /// <summary>
        /// Update GFX parameters for link effect (host and target positions).
        /// Note: In Unity, this would be called from the event system to update particle system parameters.
        /// 更新链接效果的GFX参数（施法者和目标位置）。
        /// 注意：在Unity中，这将从事件系统调用以更新粒子系统参数。
        /// </summary>
        public virtual void UpdateGfxParam(Vector3 vHost, Vector3 vTarget)
        {
            // In C++, this updates A3DGFXEx parameters (ID_PARAM_LTN_POS1, ID_PARAM_LTN_POS2)
            // In Unity, this would update particle system start/end positions
            // 在C++中，这更新A3DGFXEx参数（ID_PARAM_LTN_POS1, ID_PARAM_LTN_POS2）
            // 在Unity中，这将更新粒子系统的起始/结束位置
            // Implementation depends on how Unity particle systems handle link effects
            // 实现取决于Unity粒子系统如何处理链接效果
        }
    }
}