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>
    /// 帖子评论记录Service业务层处理
    /// </summary>
    [AppService(ServiceType = typeof(IT_CommentsService), ServiceLifetime = LifeTime.Transient)]
    public class T_CommentsService : BaseService<T_Comments>, IT_CommentsService
    {
        /// <summary>
        /// 查询帖子评论记录列表
        /// </summary>
        /// <param name="parm"></param>
        /// <returns></returns>
        public PagedInfo<T_CommentsDto> GetList(T_CommentsQueryDto parm)
        {
            var predicate = QueryExp(parm);

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

            return response;
        }


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

            return response;
        }

        /// <summary>
        /// 添加帖子评论记录
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public T_Comments AddT_Comments(T_Comments model)
        {
            return Insertable(model).ExecuteReturnEntity();
        }

        /// <summary>
        /// 修改帖子评论记录
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public int UpdateT_Comments(T_Comments model)
        {
            return Update(model, true);
        }

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

            predicate = predicate.AndIF(parm.PostId != null, it => it.PostId == parm.PostId);
            predicate = predicate.AndIF(parm.UserId != null, it => it.UserId == parm.UserId);
            return predicate;
        }
    }
}