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


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(UseToolItemReq), typeof(ItemToolUsePacketHandler), typeof(GameLoginListener))]
public class ItemToolUsePacketHandler : PacketRecvHandler
{
    public static bool send_S2C_ACK_ITEM_TOOL_USE(Player owner, Result result)
    {
        var ack_packet = new ClientToGame();
        ack_packet.Response = new ClientToGameRes();

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

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

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

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

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

            send_S2C_ACK_ITEM_TOOL_USE(entity_player, result);
            return result;
        }

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

            var item_tool_action = entity_player.getEntityAction<ItemToolAction>();
            NullReferenceCheckHelper.throwIfNull(item_tool_action, () => $"item_tool_action is null !!! - {entity_player.toBasicString()}");

            result = await item_tool_action.tryUseItemTool( request.EquipedToolItemStep, request.EquipedToolItemRandomState
                                                          , (Int64)request.ActionStartTime );
            if (result.isFail())
            {
                err_msg = $"Failed to tryUseItemTool() !!! : {result.toBasicString()} - {entity_player.toBasicString()}";
                Log.getLogger().error(err_msg);

                send_S2C_ACK_ITEM_TOOL_USE(entity_player, result);
                return result;
            }

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

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

            send_S2C_ACK_ITEM_TOOL_USE(entity_player, result);

            item_tool_action.send_S2C_NTF_ITEM_TOOL_USE();

            return result;
        };

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

        return result;
    }
}