using CommonAI.Data;
using CommonAI.Zone;
using CommonAI.Zone.Formula;
using CommonAI.Zone.Instance;
using System;
using XmdsCommon.Plugin;
using XmdsCommonServer.Plugin;
using XmdsCommonServer.Plugin.XmdsSkillTemplate.DamageCalculator;
using XmdsCommonServer.Plugin.XmdsSkillTemplate.Skills;

namespace XmdsCommonSkill.Plugin.Buffs
{

    /// <summary>
    ///BUFF：锁血
    /// </summary>
    public class XmdsBuff_LockHP : XmdsBuffBase
    { 
        /// <summary>
         ///填正值为扣血.
         /// </summary>
        public int lockHP = 0;
        private int UUID = 0;

        public override int GetAbilityID()
        {
            return (int)XmdsCommon.Plugin.XmdsBuffProperties.XmdsBuffAbility.Lock_HP;
        }

		public override void CopyTo(UnitBuff other)
		{
			var ret = other as XmdsBuff_LockHP;
			ret.lockHP = this.lockHP;

			base.CopyTo(other);
		}

		protected override void OnBindTemplate(ref BuffTemplate buffTemplate)
        {
            //DOT类技能首帧无效.
            buffTemplate.FirstTimeEnable = false;
            base.OnBindTemplate(ref buffTemplate);
        }

        public override void BuffBegin(XmdsVirtual hitter, XmdsVirtual attacker, InstanceUnit.BuffState state)
        {
            UUID = hitter.RegistOnHitDamage(OnUnitHitEvent, null, true);
        }

        public override void BuffEnd(XmdsVirtual hitter, InstanceUnit.BuffState state, bool replace)
        {
            hitter.UnRegistOnHitDamage(UUID);
        }

        //被打监听.
        protected virtual float OnUnitHitEvent(float damage, XmdsVirtual hitted, XmdsVirtual attacker, AttackSource source,
            ref XmdsVirtual.AtkResult result, DamageType damageType, GameSkill skill, ref bool isEndDispatch)
        {
            //伤害减免
            if(hitted.mUnit.CurrentHP - damage < lockHP)
            {
				if (BuffInvaildCheck())
				{
					hitted.mUnit.removeBuff(BindBuffID);
				}

				source.OutClientState = (byte)XmdsCommonServer.Plugin.XmdsVirtual.UnitHitEventState.Absorb;
				damage = Math.Max(0, hitted.mUnit.CurrentHP - lockHP);
            }

            return damage;
        }
    }
}