using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


using ServerCore;
using ServerBase;
using ServerCommon;


using SESSION_ID = System.Int32;
using WORLD_META_ID = System.UInt32;
using META_ID = System.UInt32;
using ENTITY_GUID = System.String;
using ACCOUNT_ID = System.String;
using OWNER_GUID = System.String;
using USER_GUID = System.String;
using CHARACTER_GUID = System.String;
using ITEM_GUID = System.String;


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


namespace GameServer.PacketHandler;


[PacketHandler(typeof(ClientToGameReq), typeof(DeregisterTattooReq), typeof(ItemTattooUnregisterPacketHandler), typeof(GameLoginListener))]
public class ItemTattooUnregisterPacketHandler : PacketRecvHandler
{
    public static bool send_S2C_ACK_ITEM_TATTOO_UNREGISTER(Player owner, Result result, Int16 toUnequipSlotIndex = -1)
    {
        var ack_packet = new ClientToGame();
        ack_packet.Response = new ClientToGameRes();

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

        if (result.isSuccess())
        {
            ack_packet.Response.DeregisterTattooRes.SlotIndex = toUnequipSlotIndex;
        }

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

        var err_msg = $"send_S2C_ACK_ITEM_TATTOO_UNREGISTER() !!! : {result.toBasicString()} - {owner.toBasicString()}";
        Log.getLogger().info(err_msg);

        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.DeregisterTattooReq;
        ArgumentNullReferenceCheckHelper.throwIfNull(request, () => $"request is null !!! - {player.toBasicString()}");

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

        var selected_character = player_action.getSelectedCharacter();
        if (null == selected_character)
        {
            err_msg = $"Not selected Character !!! - {player.toBasicString()}";
            result.setFail(ServerErrorCode.CharacterNotSelected, err_msg);
            Log.getLogger().error(result.toBasicString());

            send_S2C_ACK_ITEM_TATTOO_UNREGISTER(player, result);
            return result;
        }

        var server_logic = GameServerApp.getServerLogic();
        
        var fn_item_tattoo_unregister = async delegate ()
        {
            var result = new Result();

            var started_transaction_runner = player.findTransactionRunner(TransactionIdType.PrivateContents);
            NullReferenceCheckHelper.throwIfNull(started_transaction_runner, () => $"started_transaction_runner is null !!! - {player.toBasicString()}");

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

            (result, Item? unequip_item) = await item_tattoo_action.tryUnequipTattooByTattooSlotType((TattooSlotType)request.SlotIndex);
            if (result.isFail())
            {
                err_msg = $"Failed to tryUnequipTattooByTattooSlotType() !!! : {result.toBasicString()} - {started_transaction_runner.toBasicString()}, {player.toBasicString()}";
                Log.getLogger().error(err_msg);

                send_S2C_ACK_ITEM_TATTOO_UNREGISTER(player, result);
                return result;
            }

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

            result = await QueryHelper.sendQueryAndBusinessLog(batch);
            if (result.isFail())
            {
                send_S2C_ACK_ITEM_TATTOO_UNREGISTER(player, result);
                return result;
            }

            send_S2C_ACK_ITEM_TATTOO_UNREGISTER(player, result, (Int16)request.SlotIndex);

            item_tattoo_action.send_S2C_NTF_ITEM_TATTOOS();

            return result;
        };

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

        return result;
    }
}