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;


using ITEM_GUID = System.String;



namespace GameServer.PacketHandler;

[PacketHandler(typeof(ClientToGameReq), typeof(RemoveItemReq), typeof(ItemDeletePacketHandler), typeof(GameLoginListener))]

public class ItemDeletePacketHandler : PacketRecvHandler
{
    public override async Task onProcessPacketException( ISession entityWithSession, IMessage recvMessage
                                                       , Result errorResult)
    {
        await Task.CompletedTask;

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

        send_S2C_ACK_ITEM_DELETE(player, errorResult);
    }

    public static bool send_S2C_ACK_ITEM_DELETE(Player owner, Result result, Item? removedItem = null)
    {
        var ack_packet = new ClientToGame();
        ack_packet.Response = new ClientToGameRes();

        ack_packet.Response.ErrorCode = result.ErrorCode;
        ack_packet.Response.RemoveItemRes = new RemoveItemRes();

        if(result.isSuccess())
        {
            ArgumentNullReferenceCheckHelper.throwIfNull(removedItem, () => $"removedItem is null !!! - {owner.toBasicString()}");
            var item_attribute = removedItem.getOriginEntityAttribute<ItemAttributeBase>();
            NullReferenceCheckHelper.throwIfNull(item_attribute, () => $"item_attribute is null !!! - {owner.toBasicString()}");

            ack_packet.Response.RemoveItemRes.ItemGuid = item_attribute.ItemGuid;
            ack_packet.Response.RemoveItemRes.Count = item_attribute.ItemStackCount;
        }

        if (false == GameServerApp.getServerLogic().onSendPacket(owner, ack_packet))
        {
            return false;
        }

        return true;
    }

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

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

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

        (result, Item? removed_item) = await tryDeleteItemWithTransactionRunner( player, request.ItemGuid, (ushort)request.Count
                                                                               , LogActionType.ItemDestroyByUser );
        if(result.isFail())
        {
            send_S2C_ACK_ITEM_DELETE(player, result);
            return result;
        }
        NullReferenceCheckHelper.throwIfNull(removed_item, () => $"removed_item is null !!! - {player.toBasicString()}");

        send_S2C_ACK_ITEM_DELETE(player, result, removed_item);

        return result;
    }

    public static async Task<(Result, Item?)> tryDeleteItemWithTransactionRunner( Player player
                                                                                , ITEM_GUID toDeleteItemGuid, ushort toDeletedCount
                                                                                , LogActionType logActionType )
    {
        var result = new Result();
        var err_msg = string.Empty;

        var server_logic = GameServerApp.getServerLogic();

        Item? removed_item = null;
        var fn_item_delete = async delegate ()
        {
            var result = new Result();

            var inventory_action = player.getEntityAction<InventoryActionBase>();
            NullReferenceCheckHelper.throwIfNull(inventory_action, () => $"inventory action is null !!! - {player.toBasicString()}");

            (result, removed_item) = await inventory_action.tryDeleteItemByGuid(toDeleteItemGuid, toDeletedCount);
            if (result.isFail())
            {
                err_msg = $"Failed to tryDeleteItemByGuid() !!! : {result.toBasicString()} - {player.toBasicString()}";
                Log.getLogger().error(err_msg);
                return result;
            }

            var batch = new QueryBatchEx<QueryRunnerWithDocument>( player, logActionType
                                                               , server_logic.getDynamoDbClient()
                                                               , true );
            {
                batch.addQuery(new DBQWriteToAttributeAllWithTransactionRunner());
            }

            result = await QueryHelper.sendQueryAndBusinessLog(batch);
            if (result.isFail())
            {
                return result;
            }

            return result;
        };

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

            return (result, null);
        }

        if (removed_item != null)
        {
            var item_meta = removed_item.getItemMeta();
            if(null == item_meta)
            {
                err_msg = $"Not found ItemMeta !!!, in tryDeleteItemWithTransactionRunner() !!! : ItemGuid:{toDeleteItemGuid}, count:{toDeletedCount} - {player.toBasicString()}";
                Log.getLogger().error(err_msg);
            }
            else
            {
                await QuestManager.It.QuestCheck(player, new QuestItem(EQuestEventTargetType.ITEM, EQuestEventNameType.DELETED, item_meta.ItemId));
            }
        }

        return (result, removed_item);
    }
}