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(ClientToGameReq.Types.UseMegaPhoneItemReq), typeof(UseMegaPhoneItemPacketHandler), typeof(GameLoginListener))]
public class UseMegaPhoneItemPacketHandler : PacketRecvHandler
{
    public static bool send_S2C_ACK_USE_MEGAPHONE_ITEM(Player player, Result result, ITEM_GUID used_item_guid, Int32 left_count)
    {
        var ack_packet = new ClientToGame();
        ack_packet.Response = new ClientToGameRes();

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

        ack_packet.Response.UseMegaPhoneItemRes.ItemGuid = used_item_guid;
        ack_packet.Response.UseMegaPhoneItemRes.Count = left_count;

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

        return true;
    }

    public override async Task<Result> onProcessPacket(ISession entityWithSession, IMessage recvMessage)
    {
        var player = entityWithSession as Player;
        ArgumentNullReferenceCheckHelper.throwIfNull(player, () => $"player is null !!!");
        var req_msg = recvMessage as ClientToGame;
        ArgumentNullReferenceCheckHelper.throwIfNull(req_msg, () => $"req_msg is null !!! - {player.toBasicString()}");
        var request = req_msg.Request.UseMegaPhoneItemReq;
        ArgumentNullReferenceCheckHelper.throwIfNull(request, () => $"request is null !!! - {player.toBasicString()}");

        var result = new Result();
        var err_msg = string.Empty;

        var server_logic = GameServerApp.getServerLogic();

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

        var item = inventory_action.tryGetItemByItemGuid(request.ItemGuid);
        if(item == null)
        {
            err_msg = $"Failed to find item : {request.ItemGuid}";
            result.setFail(ServerErrorCode.ItemNotFound, err_msg);
            Log.getLogger().error(result.toBasicString());
            return result;
        }

        var item_data = item.getItemMeta();
        if (item_data == null)
        {
            err_msg = $"Failed to find item meta : {request.ItemGuid}";
            result.setFail(ServerErrorCode.ItemMetaDataNotFound, err_msg);
            Log.getLogger().error(result.toBasicString());
            return result;
        }

        if (item_data.TypeLarge != MetaAssets.EItemLargeType.EXPENDABLE || item_data.TypeSmall != MetaAssets.EItemSmallType.MEGAPHONE)
        {
            err_msg = $"Invalid ItemType. TypeLarge : {item_data.TypeLarge}, TypeSmall : {item_data.TypeSmall} {request.ItemGuid}";
            result.setFail(ServerErrorCode.ItemInvalidItemType, err_msg);
            Log.getLogger().error(result.toBasicString());
            return result;
        }

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

            (result, Item? removed_item) = await inventory_action.tryDeleteItemByGuid(request.ItemGuid, 1);
            if (result.isFail())
            {
                err_msg = $"Failed to tryDeleteItemByGuid() !!! : {result.toBasicString()} - {player.toBasicString()}";
                Log.getLogger().error(err_msg);

                send_S2C_ACK_USE_MEGAPHONE_ITEM(player, result, "", 0);
                return result;
            }
            NullReferenceCheckHelper.throwIfNull(removed_item, () => $"removed_item is null !!! - {player.toBasicString()}");

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

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

            var removed_item_attribute = removed_item.getEntityAttribute<ItemAttributeBase>();
            NullReferenceCheckHelper.throwIfNull(removed_item_attribute, () => $"removed_item_attribute is null !!! - {player.toBasicString()}");

            send_S2C_ACK_USE_MEGAPHONE_ITEM(player, result, removed_item_attribute.ItemGuid, removed_item_attribute.ItemStackCount);

            var receivers = server_logic.getPlayerManager().getUsers();
            foreach (var receiver in receivers)
            {
                ChatNotifyHelper.send_S2C_NTF_CHAT(receiver.Value, ChatType.Channel, player.getUserNickname(), receiver.Value.getUserNickname(), PlayerStateType.None, request.Message);
            }

            return result;
        };

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

            return result;
        }

        return result;
    }
}