DCGO/Assets/Scripts/CardEffect/BT2/Blue/BT2_023.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.Linq;
using Photon;
using System;
using Photon.Pun;

public class BT2_023 : CEntity_Effect
{
    public override List<ICardEffect> CardEffects(EffectTiming timing, CardSource card)
    {
        List<ICardEffect> cardEffects = new List<ICardEffect>();

        if (timing == EffectTiming.None)
        {
            int count()
            {
                return card.Owner.Enemy.GetBattleAreaDigimons().Count((permanent) => permanent.HasNoDigivolutionCards);
            }

            ChangeCostClass changeCostClass = new ChangeCostClass();
            changeCostClass.SetUpICardEffect($"Play Cost -", CanUseCondition, card);
            changeCostClass.SetUpChangeCostClass(changeCostFunc: ChangeCost, cardSourceCondition: CardSourceCondition, rootCondition: RootCondition, isUpDown: isUpDown, isCheckAvailability: () => false, isChangePayingCost: () => true);

            cardEffects.Add(changeCostClass);

            bool CanUseCondition(Hashtable hashtable)
            {
                if (card.Owner.HandCards.Contains(card))
                {
                    if (count() >= 1)
                    {
                        changeCostClass.SetEffectName($"Play Cost -{count()}");

                        return true;
                    }
                }

                return false;
            }



            int ChangeCost(CardSource cardSource, int Cost, SelectCardEffect.Root root, List<Permanent> targetPermanents)
            {
                if (CardSourceCondition(cardSource))
                {
                    if (RootCondition(root))
                    {
                        if (PermanentsCondition(targetPermanents))
                        {
                            Cost -= count();
                        }
                    }
                }

                return Cost;
            }

            bool PermanentsCondition(List<Permanent> targetPermanents)
            {
                if (targetPermanents == null)
                {
                    return true;
                }

                else
                {
                    if (targetPermanents.Count((targetPermanent) => targetPermanent != null) == 0)
                    {
                        return true;
                    }
                }

                return false;
            }

            bool CardSourceCondition(CardSource cardSource)
            {
                return cardSource == card;
            }

            bool RootCondition(SelectCardEffect.Root root)
            {
                if (root == SelectCardEffect.Root.Hand)
                {
                    return true;
                }

                return false;
            }

            bool isUpDown()
            {
                return true;
            }
        }

        return cardEffects;
    }
}