using Continentis.MainGame;
using Continentis.MainGame.Character;
using SLSUtilities.General;

namespace Continentis.Mods.Basic.Buffs
{
    /// <summary>
    /// 圣盾（骑士）：免疫下一次受到的伤害（不论伤害量）。
    /// 每次免疫消耗 1 层；响应式攻击和生命移除不触发免疫。
    /// </summary>
    public class HolyShield : CharacterCombatBuffBase
    {
        public HolyShield(int stack)
        {
            Initialize(BuffType.Positive, BuffDispelLevel.Strong);

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

            this.iconSubmodule = new IconSubmodule(this).SetTextFunctions("Stack");

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

            this.eventSubmodule = new EventSubmodule(this);
            this.eventSubmodule.onBeforeReceiveDamage.Add("HolyShield",
                new PrioritizedAction<IncomingDamageModifier>(OnBeforeReceiveDamage));
        }

        private void OnBeforeReceiveDamage(IncomingDamageModifier modifier)
        {
            if (modifier.context.HasAnyTag(AttackTags.Reactive, AttackTags.HpRemoval)) return;
            if (unitedStackSubmodule.stackAmount <= 0) return;

            modifier.isCancelled = true;
            MainGameManager.Instance.basePrefabs.GenerateInfoText(
                contentSubmodule.displayName, attachedCharacter.characterView);

            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;
            }

            existingBuff = null;
            return true;
        }
    }
}