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


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


using static ClientToGameReq.Types;
using static ClientToGameRes.Types;


namespace GameServer.PacketHandler;

[PacketHandler(typeof(ClientToGameReq), typeof(ClientToGameReq.Types.BuyItemReq), typeof(BuyItemPacketHandler), typeof(GameLoginListener))]
public class BuyItemPacketHandler : PacketRecvHandler
{
    private static void send_S2C_ACK_BUY_ITEM(Player player, Result result)
    {
        ArgumentNullReferenceCheckHelper.throwIfNull(player, () => $"player is null !!!");
        ArgumentNullReferenceCheckHelper.throwIfNull(result, () => $"result is null !!! - {player.toBasicString()}");

        var ack_packet = new ClientToGame
        {
            Response = new ClientToGameRes
            {
                ErrorCode = result.ErrorCode,
                BuyItemRes = new ClientToGameRes.Types.BuyItemRes()
            }
        };

        var item_buy_action = player.getEntityAction<ItemBuyAction>();
        NullReferenceCheckHelper.throwIfNull(item_buy_action, () => $"item_buy_action is null !!! - {player.toBasicString()}");

        if (result.isSuccess())
        {
            // 구매 아이템 리스트 획득
            var buy_items = item_buy_action.BuyItems;
            if (null != buy_items)
            {
                foreach (var item in buy_items.Select(info => info.toItemData4Client()))
                {
                    ack_packet.Response.BuyItemRes.Item.Add(item);
                }
            }

            // char info 획득
            var account_attribute = player.getOriginEntityAttribute<AccountAttribute>();
            NullReferenceCheckHelper.throwIfNull(account_attribute, () => $"account_attribute is null !!! - {player.toBasicString()}");
            var level_attribute = player.getOriginEntityAttribute<LevelAttribute>();
            NullReferenceCheckHelper.throwIfNull(level_attribute, () => $"level_attribute is null !!! - {player.toBasicString()}");
            var money_attribute = player.getOriginEntityAttribute<MoneyAttribute>();
            NullReferenceCheckHelper.throwIfNull(money_attribute, () => $"money_attribute is null !!! - {player.toBasicString()}");
            var nickname_attribute = player.getOriginEntityAttribute<NicknameAttribute>();
            NullReferenceCheckHelper.throwIfNull(nickname_attribute, () => $"nickname_attribute is null !!! - {player.toBasicString()}");

            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.BuyItemRes.CurrencyInfo = char_info;
        }

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

    public override async Task<Result> onProcessPacket(ISession entityWithSession, IMessage recvMessage)
    {
        var result = new Result();
        string err_msg;

        var player = entityWithSession as Player;
        
        NullReferenceCheckHelper.throwIfNull(player, () => $"player is null !!!");

        var recv_msg = recvMessage as ClientToGame;
        NullReferenceCheckHelper.throwIfNull(recv_msg, () => $"recv_msg is null !!! - {player.toBasicString()}");

        var request = recv_msg.Request.BuyItemReq;
        NullReferenceCheckHelper.throwIfNull(request, () => $"request is null !!! - {player.toBasicString()}");

        var server_logic = GameServerApp.getServerLogic();
        NullReferenceCheckHelper.throwIfNull(server_logic, () => $"server_logic is null !!! - {player.toBasicString()}");

        var fn_item_buy = async delegate ()
        {
            var result = new Result();

            var item_buy_action = player.getEntityAction<ItemBuyAction>();
            NullReferenceCheckHelper.throwIfNull(item_buy_action, () => $"item_buy_action is null !!! - {player.toBasicString()}");

            result = await item_buy_action.tryBuyItem((uint)request.ItemId, request.Count);
            if (result.isFail())
            {
                err_msg = $"Failed to tryBuyItem() !!! : {result.toBasicString()} - {player.toBasicString()}";
                Log.getLogger().error(err_msg);

                send_S2C_ACK_BUY_ITEM(player, result);

                return result;
            }

            // 3. DB 갱신
            var batch = new QueryBatchEx<QueryRunnerWithDocument>( player, LogActionType.ItemBuy
                                                               , GameServerApp.getServerLogic().getDynamoDbClient()
                                                               , true);
            {
                batch.addQuery(new DBQWriteToAttributeAllWithTransactionRunner());
            }

            result = await QueryHelper.sendQueryAndBusinessLog(batch);
            send_S2C_ACK_BUY_ITEM(player, result);

            return result;
        };

        result = await player.runTransactionRunnerSafely(TransactionIdType.PrivateContents, "ItemBuy", fn_item_buy);
        if (result.isFail())
        {
            err_msg = $"Failed to runTransactionRunnerSafely()!!! : {result.toBasicString()} - {player.toBasicString()}";
            Log.getLogger().error(err_msg);

            return result;
        }

        await QuestManager.It.QuestCheck(player, new QuestItem(EQuestEventTargetType.ITEM, EQuestEventNameType.BOUGHT, request.ItemId));

        return result;
    }
}