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>
    /// 首页轮播图Service业务层处理
    /// </summary>
    [AppService(ServiceType = typeof(IT_BannersService), ServiceLifetime = LifeTime.Transient)]
    public class T_BannersService : BaseService<T_Banners>, IT_BannersService
    {
        /// <summary>
        /// 查询首页轮播图列表
        /// </summary>
        /// <param name="parm"></param>
        /// <returns></returns>
        public PagedInfo<T_BannersDto> GetList(T_BannersQueryDto parm)
        {
            var predicate = QueryExp(parm);

            var response = Queryable()
                //.OrderBy("SortOrder desc")
                .Where(predicate.ToExpression())
                .ToPage<T_Banners, T_BannersDto>(parm);

            return response;
        }


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

            return response;
        }

        /// <summary>
        /// 添加首页轮播图
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public T_Banners AddT_Banners(T_Banners model)
        {
            return Insertable(model).ExecuteReturnEntity();
        }

        /// <summary>
        /// 修改首页轮播图
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public int UpdateT_Banners(T_Banners model)
        {
            return Update(model, true);
        }

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

            predicate = predicate.AndIF(!string.IsNullOrEmpty(parm.Title), it => it.Title == parm.Title);
            return predicate;
        }
    }
}