using Infrastructure.Attribute;
using Infrastructure.Extensions;
using ZR.LiveForum.Model.Liveforum.Dto;
using ZR.LiveForum.Model.Liveforum;
using ZR.Repository;
using ZR.Service.Liveforum.ILiveforumService;

namespace ZR.Service.Liveforum
{
    /// <summary>
    /// 消息记录Service业务层处理
    /// </summary>
    [AppService(ServiceType = typeof(IT_MessagesService), ServiceLifetime = LifeTime.Transient)]
    public class T_MessagesService : BaseService<T_Messages>, IT_MessagesService
    {
        /// <summary>
        /// 查询消息记录列表
        /// </summary>
        /// <param name="parm"></param>
        /// <returns></returns>
        public PagedInfo<T_MessagesDto> GetList(T_MessagesQueryDto parm)
        {
            var predicate = QueryExp(parm);

            var response = Queryable()
                //.OrderBy("Id desc")
                .Where(predicate.ToExpression())
                .ToPage<T_Messages, T_MessagesDto>(parm);

            return response;
        }


        /// <summary>
        /// 获取详情
        /// </summary>
        /// <param name="Id"></param>
        /// <returns></returns>
        public T_Messages GetInfo(long Id)
        {
            var response = Queryable()
                .Where(x => x.Id == Id)
                .First();

            return response;
        }

        /// <summary>
        /// 添加消息记录
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public T_Messages AddT_Messages(T_Messages model)
        {
            return Insertable(model).ExecuteReturnEntity();
        }

        /// <summary>
        /// 修改消息记录
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public int UpdateT_Messages(T_Messages model)
        {
            return Update(model, true);
        }

        /// <summary>
        /// 查询导出表达式
        /// </summary>
        /// <param name="parm"></param>
        /// <returns></returns>
        private static Expressionable<T_Messages> QueryExp(T_MessagesQueryDto parm)
        {
            var predicate = Expressionable.Create<T_Messages>();

            predicate = predicate.AndIF(parm.ReceiverId != null, it => it.ReceiverId == parm.ReceiverId);
            predicate = predicate.AndIF(parm.MessageType != null, it => it.MessageType == parm.MessageType);
            return predicate;
        }

        /// <summary>
        /// 发送系统通知消息
        /// </summary>
        /// <param name="receiverId">接收者用户ID</param>
        /// <param name="messageContent">消息内容</param>
        /// <param name="contentId">关联的内容ID（可选）</param>
        /// <returns></returns>
        public T_Messages SendSystemNotification(long receiverId, string messageContent, long? contentId = null)
        {
            var message = new T_Messages
            {
                ReceiverId = receiverId,
                SenderId = null, // 系统消息
                MessageType = 4, // 系统通知
                ContentType = 3, // 用户
                ContentId = contentId,
                MessageContent = messageContent,
                IsRead = false,
                CreatedAt = DateTime.Now
            };
            return AddT_Messages(message);
        }
    }
}