DCGO/Assets/Scripts/CardEffectCommons/KeyWordEffects/Collision.cs

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

public partial class CardEffectCommons
{
    #region Target 1 Digimon gains [Collision]
    public static IEnumerator GainCollision(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 = targetPermanent.TopCard;

        bool PermanentCondition(Permanent permanent) => permanent == targetPermanent;

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

            return false;
        }

        ActivateClass collision = CardEffectFactory.CollisionSelfStaticEffect(false, card, CanUseCondition);

        AddEffectToPermanent(targetPermanent: targetPermanent, effectDuration: effectDuration, card: card, cardEffect: collision, timing: EffectTiming.OnCounterTiming);

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

    #region Can activate [Collision]
    public static bool CanActivateCollision(CardSource cardSource)
    {
        return IsExistOnBattleArea(cardSource) &&
               cardSource.Owner.Enemy.GetBattleAreaDigimons().Count >= 1 &&
               GManager.instance.attackProcess.IsAttacking &&
               GManager.instance.attackProcess.AttackingPermanent == cardSource.PermanentOfThisCard();
    }
    #endregion

    #region Effect process of [Collision]
    public static IEnumerator CollisionProcess(CardSource cardSource, ICardEffect activateClass, Func<IEnumerator> beforeOnAttackCoroutine = null)
    {
        List<Permanent> enemyDigimons = cardSource.Owner.Enemy.GetBattleAreaDigimons();

        if (CanActivateCollision(cardSource))
        {
            foreach (Permanent enemyDigimon in enemyDigimons)
            {
                if (enemyDigimon.TopCard.CanNotBeAffected(activateClass))
                    continue;

                yield return ContinuousController.instance.StartCoroutine(GainBlocker(
                        targetPermanent: enemyDigimon,
                        effectDuration: EffectDuration.UntilEndAttack,
                        activateClass: activateClass));
            }

            if (HasMatchConditionOpponentsPermanent(cardSource, permanent => permanent.HasBlocker))
                GManager.instance.attackProcess.IsBlocking = true;
        }
    }
    #endregion
}