using FreeSql;

using LiveForum.Code.Base;
using LiveForum.IService.Others;
using LiveForum.Model;
using LiveForum.Model.Dto.Others;

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace LiveForum.Service.Others
{
    public class BannersService : IBannersService
    {
        private readonly IBaseRepository<T_Banners> _bannersRepository;

        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="bannersRepository">轮播图仓储</param>
        public BannersService(IBaseRepository<T_Banners> bannersRepository)
        {
            _bannersRepository = bannersRepository;
        }

        /// <summary>
        /// 获取轮播图列表
        /// </summary>
        /// <returns></returns>
        public async Task<BaseResponseList<BannerDto>> GetBanners()
        {
            var now = DateTime.Now;

            // 查询启用的轮播图
            var banners = await _bannersRepository.Select
                .Where(x => x.IsActive &&
                           (x.StartTime == null || x.StartTime <= now) &&
                           (x.EndTime == null || x.EndTime >= now))
                .OrderBy(x => x.SortOrder)
                //.ThenByDescending(x => x.CreatedAt)
                .ToListAsync();

            var items = banners.Select(banner => new BannerDto
            {
                BannerId = banner.Id,
                Title = banner.Title ?? "",
                ImageUrl = banner.ImageUrl ?? "",
                LinkUrl = banner.LinkUrl ?? "",
                LinkType = banner.LinkType ?? 0,
                TargetId = banner.LinkUrl??"",
                SortOrder = banner.SortOrder
            }).ToList();

            return new BaseResponseList<BannerDto>
            {
                Code = ResponseCode.Success,
                Data = items
            };
        }

        /// <summary>
        /// 点击轮播图
        /// </summary>
        /// <param name="request">请求参数</param>
        /// <returns></returns>
        public async Task<BaseResponse<BannerClickRespDto>> ClickBanner(BannerClickReq request)
        {
            // 获取轮播图
            var banner = await _bannersRepository.Select
                .Where(x => x.Id == request.BannerId)
                .FirstAsync();

            if (banner == null)
            {
                return new BaseResponse<BannerClickRespDto>(ResponseCode.Error, "轮播图不存在");
            }

            // 增加点击次数
            banner.ClickCount++;
            await _bannersRepository.UpdateAsync(banner);

            return new BaseResponse<BannerClickRespDto>(new BannerClickRespDto
            {
                ClickCount = banner.ClickCount
            });
        }
    }
}