using Fantasy;
using Fantasy.Async;
using Fantasy.Network.Interface;

namespace NB.Chat;

/// <summary>
/// 请求进入频道
/// </summary>
public class
    C2Chat_JoinChannelRequestHandler : RouteRPC<ChatUnit, C2Chat_JoinChannelRequest, Caht2C_JoinChannelResponse>
{
    protected override async FTask Run(ChatUnit entity, C2Chat_JoinChannelRequest request,
        Caht2C_JoinChannelResponse response, Action reply)
    {
        var channelCenter = entity.Scene.GetComponent<ChatChannelCenterComponent>();
        if (channelCenter == null)
        {
            response.ErrorCode = ErrorCode.ErrServer;
            return;
        }

        var oldChannelId = entity.CurrentChannel;
        if (oldChannelId > 0)
        {
            //退出旧的频道
            if (channelCenter.TryGet(oldChannelId, out var oldChannel) && oldChannel != null)
            {
                oldChannel.Exit(entity);
            }
        }

        //加入新频道
        if (channelCenter.TryGet(request.Target, out var channel) && channel != null)
        {
            channel.Enter(entity);
        }
        else
        {
            response.ErrorCode = ErrorCode.ChatNotChannel;
        }

        await FTask.CompletedTask;
    }
}