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

namespace DCGO.CardEffects.BT21
{
    public class BT21_026 : CEntity_Effect
    {
        public override List<ICardEffect> CardEffects(EffectTiming timing, CardSource card)
        {
            List<ICardEffect> cardEffects = new List<ICardEffect>();

            #region Play Cost Reduction

            if (timing == EffectTiming.None)
            {
                int count()
                {
                    return 2 * card.Owner.Enemy.GetBattleAreaPermanents().Count((permanent) => permanent.IsDigimon);
                }

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

                bool CanUseCondition(Hashtable hashtable)
                {
                    return true;
                }

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

                    return Cost;
                }

                bool PermanentsCondition(List<Permanent> targetPermanents)
                {
                    return targetPermanents == null ||
                        targetPermanents.Count((targetPermanent) => targetPermanent != null) == 0;
                }

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

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

                bool isUpDown()
                {
                    return true;
                }
            }

            #endregion

            #region Rush/Raid/Blocker

            if (timing == EffectTiming.None)
            {
                cardEffects.Add(CardEffectFactory.RushSelfStaticEffect(isInheritedEffect: false, card: card, condition: null));

                cardEffects.Add(CardEffectFactory.BlockerSelfStaticEffect(isInheritedEffect: false, card: card, condition: null));
            }

            if (timing == EffectTiming.OnAllyAttack)
            {
                cardEffects.Add(CardEffectFactory.RaidSelfEffect(isInheritedEffect: false, card: card, condition: null));
            }

            #endregion

            #region All Turns

            if (timing == EffectTiming.OnDestroyedAnyone)
            {
                ActivateClass activateClass = new ActivateClass();
                activateClass.SetUpICardEffect("Unsuspend", CanUseCondition, card);
                activateClass.SetUpActivateClass(CanActivateCondition, ActivateCoroutine, 1, true, EffectDiscription());
                activateClass.SetHashString("Unsuspend_BT21-026");
                cardEffects.Add(activateClass);

                string EffectDiscription()
                {
                    return "[All Turns] [Once Per Turn] When any of your opponent's Digimon are deleted, this Digimon may unsuspend.";
                }

                bool IsOpponentsDigimon(Permanent permanent)
                {
                    return CardEffectCommons.IsPermanentExistsOnOpponentBattleAreaDigimon(permanent, card);
                }

                bool CanUseCondition(Hashtable hashtable)
                {
                    return CardEffectCommons.IsExistOnBattleAreaDigimon(card) &&
                           CardEffectCommons.CanTriggerOnPermanentDeleted(hashtable, IsOpponentsDigimon, activateClass);
                }

                bool CanActivateCondition(Hashtable hashtable)
                {
                    return CardEffectCommons.IsExistOnBattleAreaDigimon(card);
                }

                IEnumerator ActivateCoroutine(Hashtable hashtable)
                {
                    yield return ContinuousController.instance.StartCoroutine(new IUnsuspendPermanents(new List<Permanent>() { card.PermanentOfThisCard() }, activateClass).Unsuspend());
                }
            }

            #endregion

            return cardEffects;
        }
    }
}