using Google.Protobuf;
using Google.Protobuf.WellKnownTypes;


using ServerCore;
using ServerBase;
using ServerCommon;
using ServerCommon.BusinessLogDomain;
using MetaAssets;


using META_ID = System.UInt32;


namespace GameServer.PacketHandler;

[PacketHandler(typeof(ClientToGameReq), typeof(ClientToGameReq.Types.ShopPurchaseItemReq), typeof(ShopPurchaseItemPacketHandler), typeof(GameLoginListener))]
public class ShopPurchaseItemPacketHandler : PacketRecvHandler
{
    private static void send_S2C_ACK_SHOP_PURCHASE_ITEM(Player owner, int shop_id, Result result, List<Item>? purchasedItems, List<Item>? spendItems)
    {            
        var ack_packet = new ClientToGame
        {
            Response = new ClientToGameRes
            {
                ErrorCode = result.ErrorCode,
                ShopPurchaseItemRes = new ClientToGameRes.Types.ShopPurchaseItemRes()
            }
        };

        var purchase_action = owner.getEntityAction<ShopAction>().getMyShopProduct(shop_id)
            .getEntityAction<PurchaseShopProductAction>();
        if (null == purchase_action)
        {
            ack_packet.Response.ErrorCode = ServerErrorCode.EntityActionNotFound;
            var err_msg = $"Fail to get entity action: {nameof(PurchaseShopProductAction)}";
            Log.getLogger().error(err_msg);
            result.setFail(ack_packet.Response.ErrorCode, err_msg);
        }

        if (result.isSuccess())
        {
            if (null != purchasedItems)
            {
                foreach (var item in purchasedItems.Select(info => info.toItemData4Client()))
                {
                    ack_packet.Response.ShopPurchaseItemRes.Items.Add(item);
                }
            }

            if (null != spendItems)
            {
                foreach (var del in spendItems.Select(info => info.toItemData4Client()))
                {
                    ack_packet.Response.ShopPurchaseItemRes.DelItems.Add(del);
                }
            }
            
            var account_attribute = owner.getOriginEntityAttribute<AccountAttribute>();
            var level_attribute = owner.getOriginEntityAttribute<LevelAttribute>();
            var money_attribute = owner.getOriginEntityAttribute<MoneyAttribute>();
            var nickname_attribute = owner.getOriginEntityAttribute<NicknameAttribute>();

            var char_info = new CharInfo
            {
                Level = (int)level_attribute!.Level,
                Exp = (int)level_attribute.Exp,
                
                Gold = money_attribute!.Gold,
                Sapphire = money_attribute.Sapphire,
                Calium = money_attribute.Calium,
                Ruby = money_attribute.Ruby,
                
                Usergroup = account_attribute!.AuthAdminLevelType.ToString(), 
                Operator = (int)account_attribute.AuthAdminLevelType,
                
                DisplayName = nickname_attribute!.Nickname,
                LanguageInfo = (int)account_attribute.LanguageType,
                
                IsIntroComplete = 1
            };
            ack_packet.Response.ShopPurchaseItemRes.CurrencyInfo = char_info;
        }

        GameServerApp.getServerLogic().onSendPacket(owner, ack_packet);
    }

    public override async Task<Result> onProcessPacket(ISession entityWithSession, IMessage recvMessage)
    {
        var result = new Result();
        string err_msg;
        var entity_player = entityWithSession as Player;
        NullReferenceCheckHelper.throwIfNull(entity_player, () => $"entity_player is null !!!");

        // 1. 기본 정보 체크
        var request = (recvMessage as ClientToGame)?.Request.ShopPurchaseItemReq;
        if (null == request)
        {
            err_msg = $"Failed to get Request !!! : {nameof(ClientToGame.Request.ShopPurchaseItemReq)}";
            result.setFail(ServerErrorCode.InvalidArgument, err_msg);
            Log.getLogger().error(result.toBasicString());

            send_S2C_ACK_SHOP_PURCHASE_ITEM(entity_player, 0, result, null, null);
            return result;
        }

        var check = ShopHelper.checkShopIdFromTableData(request.ShopID);
        if (check.result.isFail())
        {
            err_msg = $"Failed to check Shop Id from Table Data !!! : {request.ShopID}";
            result.setFail(ServerErrorCode.NotFoundShopId, err_msg);
            Log.getLogger().error(result.toBasicString());
            
            send_S2C_ACK_SHOP_PURCHASE_ITEM(entity_player, request.ShopID, result, null, null);
            return result;
        }
        
        // 2. 구매 로직 시행
        result = await entity_player.runTransactionRunnerSafely(TransactionIdType.PrivateContents, "ShopPurchase", purchaseShopItemDelegate);
        if (result.isFail())
        {
            err_msg = $"Failed to runTransactionRunnerSafely()!!! : {result.toBasicString()} - {entity_player.toBasicString()}";
            Log.getLogger().error(err_msg);
            send_S2C_ACK_SHOP_PURCHASE_ITEM(entity_player, request.ShopID, result, null, null);
            return result;
        }
        
        if (true == MetaData.Instance._ShopProductMetaTable.TryGetValue(request.ProductID, out var shop_product_meta_data))
        {
            if (shop_product_meta_data.ProductData.Item is not null)
            {
                await QuestManager.It.QuestCheck(entity_player, new QuestItem(EQuestEventTargetType.ITEM, EQuestEventNameType.BOUGHT, shop_product_meta_data.ProductData.Item.Id));
            }
            
        }
        
        return result;

        async Task<Result> purchaseShopItemDelegate() =>
            await purchaseShopItemAsync(entity_player, request.ShopID, request.ProductID, request.Count);
    }

    private async Task<Result> purchaseShopItemAsync(Player entity_player, int shop_id, int product_id, int purchase_count)
    {
        var result = new Result();
        string err_msg;
        
        var shop_purchase_info = new ShopPurchaseInfo();
        shop_purchase_info.m_shop_id = shop_id;
        shop_purchase_info.m_shop_product_id = product_id;
        shop_purchase_info.m_shop_product_count = purchase_count;

        // 0. action 가져오기
        var purchase_action = entity_player.getEntityAction<ShopAction>().getMyShopProduct(shop_id).getEntityAction<PurchaseShopProductAction>();
        if (null == purchase_action)
        {
            err_msg =
                $"Failed to get EntityAction !!! : EntityActionType:PurchaseShopProductAction - {entity_player.toBasicString()}";
            result.setFail(ServerErrorCode.EntityActionNotFound, err_msg);
            Log.getLogger().error(result.toBasicString());
            
            return result;
        }
        
        // 0. 구매 타입 체크 ( get discount type / discount rate )
        var discount = purchase_action.checkPurchaseDiscountType(product_id);
        
        // 1. 구매 조건 체크 : 상품 조건 
        var check_shop_product_conditions = purchase_action.checkPurchaseShopProductConditions(shop_id, product_id, purchase_count);
        if (check_shop_product_conditions.result.isFail()) return check_shop_product_conditions.result;

        NullReferenceCheckHelper.throwIfNull(check_shop_product_conditions.product_data, () => $"check_shop_product_conditions.product_data is null !!!");

        // 2. 구매 조건 체크 : 캐릭터 조건
        result = purchase_action.checkPurchaseCharacterConditions(check_shop_product_conditions.product_data);
        if (result.isFail()) return result;

        // 3. 구매 처리
        result = await purchase_action.processPurchase(check_shop_product_conditions.product_data, purchase_count, discount.discount_rate, shop_purchase_info);
        if (result.isFail()) return result;

        NullReferenceCheckHelper.throwIfNull(shop_purchase_info.m_spent, () => $"shop_purchase_info.m_spent is null !!!");
        NullReferenceCheckHelper.throwIfNull(shop_purchase_info.m_purchase, () => $"shop_purchase_info.m_purchase is null !!!");

        // 4. 재화 소모
        var spent = await purchase_action.processSpent(shop_purchase_info.m_spent);
        if (spent.result.isFail()) return spent.result;
        shop_purchase_info.m_purchase.m_spend_items = spent.del_items?.ToList();

        // 5. 상점 물품 갱신
        result = await purchase_action.updateShopProductMeter(product_id, purchase_count);
        if (result.isFail()) return result;
        
        // 6. 첫 구매 히스토리 갱신
        if (check_shop_product_conditions.product_data.ProductData.Item != null)
        {
            result = await purchase_action.updateItemFirstPurchaseHistory(discount.discount_type, check_shop_product_conditions.product_data.ProductData.Item.Id);
            if (result.isFail()) return result;
        }
            
        // 7. DB 갱신
        var batch = new QueryBatchEx<QueryRunnerWithDocument>( entity_player, LogActionType.ShopPurchase
            , GameServerApp.getServerLogic().getDynamoDbClient(), true);
        {
            batch.addQuery(new DBQWriteToAttributeAllWithTransactionRunner());
            batch.addQuery(new QueryFinal());
        }

        // 8. Business Log 기록
        writeBusinessLog(batch, shop_purchase_info);
        
        result = await QueryHelper.sendQueryAndBusinessLog(batch);
        
        send_S2C_ACK_SHOP_PURCHASE_ITEM(entity_player, shop_id, result, shop_purchase_info.m_purchase.m_purchase_items, shop_purchase_info.m_purchase.m_spend_items?.ToList());

        return result;
    }

    private void writeBusinessLog(QueryBatchBase queryBatchBase, ShopPurchaseInfo shopPurchaseInfo)
    {
        // Shop 정보 기록
        var shop_log_data = new ShopLogData
        {
            ShopMId = (META_ID)shopPurchaseInfo.m_shop_id,
            ProductMId = (META_ID)shopPurchaseInfo.m_shop_product_id,
            ProductCount = shopPurchaseInfo.m_shop_product_count
        };
        
        var shop_business_log = new ShopBusinessLog(shop_log_data);
        queryBatchBase.appendBusinessLog(shop_business_log);
    }
}