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>
    /// 点赞表，存储用户对帖子和评论的点赞记录Service业务层处理
    /// </summary>
    [AppService(ServiceType = typeof(IT_LikesService), ServiceLifetime = LifeTime.Transient)]
    public class T_LikesService : BaseService<T_Likes>, IT_LikesService
    {
        /// <summary>
        /// 查询点赞表，存储用户对帖子和评论的点赞记录列表
        /// </summary>
        /// <param name="parm"></param>
        /// <returns></returns>
        public PagedInfo<T_LikesDto> GetList(T_LikesQueryDto parm)
        {
            var predicate = QueryExp(parm);

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

            return response;
        }


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

            return response;
        }

        /// <summary>
        /// 添加点赞表，存储用户对帖子和评论的点赞记录
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public T_Likes AddT_Likes(T_Likes model)
        {
            return Insertable(model).ExecuteReturnEntity();
        }

        /// <summary>
        /// 修改点赞表，存储用户对帖子和评论的点赞记录
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public int UpdateT_Likes(T_Likes model)
        {
            return Update(model, true);
        }

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

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