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

namespace Continentis.Mods.Basic.Buffs
{
    /// <summary>
    /// 筑城（Fortification）Buff：
    /// 每回合首次行动开始时，获得等同于 Firm Buff Stack层数 * Fortification Buff Stack层数的格挡。
    /// 前后施加层数会合并叠加。
    /// </summary>
    public class Fortification : CharacterCombatBuffBase
    {
        public Fortification(int stack)
        {
            Initialize(BuffType.Positive, BuffDispelLevel.Strong);
            
            this.contentSubmodule = new ContentSubmodule(this)
                .AddParameterGetter("Stack", () => unitedStackSubmodule.stackAmount.ToString());
            
            this.iconSubmodule = new IconSubmodule(this);
            
            // 无限持续时间 (-1)，支持层数叠加
            this.unitedStackSubmodule = new UnitedStackSubmodule(this, true, -1, stack, false);
            
            this.eventSubmodule = new EventSubmodule(this);
            this.eventSubmodule.onActionStart.InsertByPriority("Fortification_Block", new PrioritizedAction(() =>
            {
                if (attachedCharacter.actionCountThisRound == 0) // 每个回合首次行动开始时
                {
                    if (attachedCharacter.combatBuffSubmodule.TryGetBuff<Firm>(out var firmBuff))
                    {
                        int firmStack = firmBuff.unitedStackSubmodule.stackAmount;
                        if (firmStack > 0)
                        {
                            int blockGain = firmStack * this.unitedStackSubmodule.stackAmount;
                            attachedCharacter.AddBlock(blockGain);
                        }
                    }
                }
            }));
        }
        
        public override bool OnBuffApply(out CharacterCombatBuffBase existingBuff) 
        {
            MainGameManager.Instance.basePrefabs.GenerateInfoText("Fortification", attachedCharacter.characterView);
            
            if (FindExistingSameBuff(out existingBuff))
            {
                // 新的层数直接叠加到原有的Buff上
                existingBuff.unitedStackSubmodule.AddStack(this.unitedStackSubmodule.stackAmount);
                return false;
            }
            
            return true;
        }
    }
}