using System.Collections.Generic;
using Continentis.MainGame;
using Continentis.MainGame.Character;
using Continentis.MainGame.Combat;
using SLSUtilities.General;
using UnityEngine;

namespace Continentis.Mods.Basic.Buffs
{
    /// <summary>
    /// 感电（Storm 元素）：承载者每次被攻击时，
    /// 对随机 1 个其他敌方目标造成等同于层数的雷电伤害，然后层数 -1。
    /// 对单敌战斗退化（无其他目标时无效）。
    /// 过滤 Reactive/HpRemoval/Reflected 防递归。
    /// </summary>
    public sealed class Shocked : CharacterCombatBuffBase
    {
        public Shocked(int stack)
        {
            Initialize(BuffType.Negative, BuffDispelLevel.Basic);

            this.contentSubmodule = new ContentSubmodule(this)
                .AddParameterGetter("Stack", () => unitedStackSubmodule.stackAmount.ToString());

            this.iconSubmodule = new IconSubmodule(this);

            this.unitedStackSubmodule = new UnitedStackSubmodule(this, stack);

            this.eventSubmodule = new EventSubmodule(this);
            this.eventSubmodule.onGetAttacked.Add("Shocked", new PrioritizedAction<AttackResult>(OnGetAttacked));
        }

        private void OnGetAttacked(AttackResult result)
        {
            // 响应式 / 生命移除 / 反弹伤害不触发感电
            if (result.context.HasAnyTag(AttackTags.Reactive, AttackTags.HpRemoval, AttackTags.Reflected))
                return;

            // 收集除自身以外的其他同阵营敌方角色
            List<CharacterBase> others = CombatMainManager.Instance.characterController
                .GetAllEnemies(attachedCharacter);
            others.Remove(attachedCharacter);

            if (others.Count == 0) return;

            CharacterBase spreadTarget = others[Random.Range(0, others.Count)];
            int damage = unitedStackSubmodule.stackAmount;

            var ctx = new AttackContext()
                .WithTag(AttackTags.Reactive)
                .WithTag(AttackTags.GuaranteedHit)
                .WithDamageKeywords("Storm");

            sourceCharacter.Attack(spreadTarget, damage, ctx);

            unitedStackSubmodule.ReduceStack(1);
            iconSubmodule.Update();
        }

        public override bool OnBuffApply(out CharacterCombatBuffBase existingBuff)
        {
            MainGameManager.Instance.basePrefabs.GenerateInfoText(
                contentSubmodule.displayName, attachedCharacter.characterView);

            if (FindExistingSameBuff(out existingBuff))
            {
                existingBuff.unitedStackSubmodule.AddStack(this.unitedStackSubmodule.stackAmount);
                return false;
            }

            return true;
        }
    }
}