using System;
using System.Numerics;

// 의상: 공통 옷장 레벨(Clothes 72단계 · StatRate = 전역 배율 · 장착 의상과 무관) + 의상 32종 해금·장착 — systems.md §5
namespace VS.Sim
{
    public static class ClosetUnlock { public const int Default = 0, Free = 1, Ticket = 2, InEvent = 4; }

    public partial class Game
    {
        public ClothesRow ClosetLevelRow(int level) { int i = T.ClothesRowIndex(level); return i >= 0 ? T.Clothes.Levels[i] : null; }
        public bool ClosetMaxed => S.closetLevel >= ClosetMaxLevel;
        public ClothesRow ClosetNext => ClosetMaxed ? null : ClosetLevelRow(S.closetLevel + 1);

        /// GetUpgradeQuote RVA 0x23EAE14 — 할인가 · 첫 구매는 10% (FirstPurchasePricePercent)
        public BigInteger ClosetNextPrice()
        {
            var n = ClosetNext;
            if (n == null) return BigInteger.Zero;
            var p = DiscountedPrice(T.ClothesPrice[T.ClothesRowIndex(n.Level)]);
            if (!S.isBuyCloset && S.closetLevel < 1) p = p * T.X.closetFirstPurchasePercent / 100;
            return p;
        }

        /// IsRankLocked RVA 0x23EAD74
        public bool ClosetRankOk() { var n = ClosetNext; return n != null && n.RankDependency <= S.rankIndex; }

        /// TryUpgrade RVA 0x23EB404 (1단계)
        public BuyResult UpgradeCloset()
        {
            var n = ClosetNext;
            if (n == null) return BuyResult.Max;
            if (ClosetUpgrading) return BuyResult.Busy;
            if (!ClosetRankOk()) return BuyResult.Locked;
            var price = ClosetNextPrice();
            if (price > Coin) return BuyResult.NoMoney;
            SpendCoin(price);
            int before = S.closetLevel;
            S.closetLevel = n.Level;
            if (n.UpgradeTime > 0f) S.closetUpgradeEnd = Now().AddSeconds(n.UpgradeTime).Ticks;
            S.isBuyCloset = true;
            MarkNewFreeOutfits(before, S.closetLevel);
            OnClosetUpgraded();
            return BuyResult.Ok;
        }

        public void SkipClosetUpgrade() { S.closetUpgradeEnd = 0; }

        // ---- 의상(outfit) — IsUnlocked RVA 0x23ECD0C
        public OutfitRow Outfit(int type) => T.Cfg.closet.outfits.Find(o => o.Type == type);

        public bool OutfitUnlocked(int type)
        {
            if (type == 1000) return true;
            var o = Outfit(type);
            if (o == null) return false;
            switch (o.UnlockType)
            {
                case ClosetUnlock.Default: return true;
                case ClosetUnlock.Free: return S.closetLevel >= o.UnlockLevel;
                default: return S.closetUnlocked.Contains(type);
            }
        }

        /// GetOutfitTicketPrice RVA 0x23ED174 (광고 차감 = 클론에 없음)
        public int OutfitTicketPrice(OutfitRow o) => Math.Max(o.TicketPrice, 1);
        /// IsTicketOutfitRankLocked RVA 0x23ED230
        public bool OutfitRankOk(OutfitRow o) => o.VisibilityRank <= 0 || S.rankIndex >= o.VisibilityRank;

        void MarkNewFreeOutfits(int before, int after)
        {
            foreach (var o in T.Cfg.closet.outfits)
                if (o.UnlockType == ClosetUnlock.Free && o.UnlockLevel > before && o.UnlockLevel <= after && !S.closetNew.Contains(o.Type)) S.closetNew.Add(o.Type);
        }

        /// TryStageTicketPurchase RVA 0x23ED45C
        public BuyResult UnlockTicketOutfit(int type)
        {
            var o = Outfit(type);
            if (o == null || o.UnlockType != ClosetUnlock.Ticket) return BuyResult.Locked;
            if (OutfitUnlocked(type)) return BuyResult.Max;
            if (!OutfitRankOk(o)) return BuyResult.Locked;
            int price = OutfitTicketPrice(o);
            if (S.ticket < price) return BuyResult.NoMoney;
            S.ticket -= price;
            S.closetUnlocked.Add(type);
            if (!S.closetNew.Contains(type)) S.closetNew.Add(type);
            return BuyResult.Ok;
        }

        /// 일일 보상 의상 (TryGrantEventOutfit)
        public void GrantEventOutfit(int type) { if (!S.closetUnlocked.Contains(type)) { S.closetUnlocked.Add(type); S.closetNew.Add(type); } }

        public bool EquipOutfit(int type)
        {
            if (!OutfitUnlocked(type)) return false;
            S.closetCurrent = type;
            S.closetNew.Remove(type);
            return true;
        }
    }
}