DCGO/Assets/Scripts/Script/CardEffectCommons/KeyWordEffects/Vortex.cs

using System.Collections;

public partial class CardEffectCommons
{
    #region Can activate [Vortex]

    public static bool CanActivateVortex(CardSource cardSource, ICardEffect activateClass)
    {
        return IsExistOnBattleArea(cardSource) &&
               cardSource.PermanentOfThisCard().CanAttack(activateClass, isVortex: true) &&
               (HasMatchConditionOpponentsPermanent(cardSource, permanent =>
                   permanent.IsDigimon &&
                   cardSource.PermanentOfThisCard().CanAttackTargetDigimon(permanent, activateClass, isVortex: true))
                || PermanentHasVortexCanAttackPlayers(cardSource.PermanentOfThisCard()));
    }

    #endregion

    public static bool PermanentHasVortexCanAttackPlayers(Permanent permanent)
    {
        #region the effects of permanents

        if (GManager.instance.turnStateMachine.gameContext.Players
            .Map(player => player.GetFieldPermanents())
            .Flat()
            .Map(permanent => permanent.EffectList(EffectTiming.None))
            .Flat()
            .Some(cardEffect => cardEffect is IVortexCanAttackPlayersEffect
                && cardEffect.CanUse(null)
                && ((IVortexCanAttackPlayersEffect)cardEffect).VortexCanAttackPlayersPermanent(permanent)))
        {
            return true;
        }

        #endregion

        #region the effects of players

        if (GManager.instance.turnStateMachine.gameContext.Players
                .Map(player => player.EffectList(EffectTiming.None))
                .Flat()
                .Some(cardEffect => cardEffect is IVortexCanAttackPlayersEffect
                    && cardEffect.CanUse(null)
                    && ((IVortexCanAttackPlayersEffect)cardEffect).VortexCanAttackPlayersPermanent(permanent)))
        {
            return true;
        }

        #endregion

        return false;
    }

    #region Effect process of [Vortex]

    public static IEnumerator VortexProcess(CardSource cardSource, ICardEffect activateClass)
    {
        Permanent selectedPermanent = cardSource.PermanentOfThisCard();

        bool canAttackPlayers = PermanentHasVortexCanAttackPlayers(selectedPermanent);

        if (selectedPermanent.CanAttack(activateClass, isVortex: true))
        {
            SelectAttackEffect selectAttackEffect = GManager.instance.GetComponent<SelectAttackEffect>();

            selectAttackEffect.SetUp(
                attacker: selectedPermanent,
                canAttackPlayerCondition: () => canAttackPlayers,
                defenderCondition: _ => true,
                cardEffect: activateClass);
            
            selectAttackEffect.SetIsVortex();
            yield return ContinuousController.instance.StartCoroutine(selectAttackEffect.Activate());
        }
    }

    #endregion

    #region Target 1 Digimon gains [Vortex]

    public static IEnumerator GainVortex(Permanent targetPermanent, EffectDuration effectDuration, ICardEffect activateClass)
    {
        if (targetPermanent == null) yield break;
        if (!IsPermanentExistsOnBattleArea(targetPermanent)) yield break;
        if (activateClass == null) yield break;
        if (activateClass.EffectSourceCard == null) yield break;

        CardSource card = activateClass.EffectSourceCard;

        bool CanUseCondition()
        {
            return IsPermanentExistsOnBattleArea(targetPermanent) &&
                   !targetPermanent.TopCard.CanNotBeAffected(activateClass);
        }

        ActivateClass vortex = CardEffectFactory.VortexEffect(
            targetPermanent: targetPermanent,
            isInheritedEffect: false,
            condition: CanUseCondition,
            rootCardEffect: activateClass,
            targetPermanent.TopCard);

        AddEffectToPermanent(
            targetPermanent: targetPermanent,
            effectDuration: effectDuration,
            card: card,
            cardEffect: vortex,
            timing: EffectTiming.OnEndTurn);

        if (!targetPermanent.TopCard.CanNotBeAffected(activateClass))
        {
            yield return ContinuousController.instance.StartCoroutine(GManager.instance.GetComponent<Effects>()
                .CreateBuffEffect(targetPermanent));
        }
    }

    #endregion
}