using SPMS.Application.DTOs.Banner;
using SPMS.Application.Interfaces;
using SPMS.Domain.Common;
using SPMS.Domain.Exceptions;
using SPMS.Domain.Interfaces;

namespace SPMS.Application.Services;

public class BannerService : IBannerService
{
    private readonly IBannerRepository _bannerRepository;
    private readonly IServiceRepository _serviceRepository;

    public BannerService(IBannerRepository bannerRepository, IServiceRepository serviceRepository)
    {
        _bannerRepository = bannerRepository;
        _serviceRepository = serviceRepository;
    }

    public async Task<BannerListResponseDto> GetListAsync(string serviceCode, BannerListRequestDto request)
    {
        var service = await _serviceRepository.GetByServiceCodeAsync(serviceCode);
        if (service == null)
            throw new SpmsException(ErrorCodes.NotFound, "존재하지 않는 서비스입니다.", 404);

        var items = await _bannerRepository.GetActiveListAsync(service.Id, request.Position);

        return new BannerListResponseDto
        {
            Items = items.Select(b => new BannerItemDto
            {
                BannerId = b.Id,
                Title = b.Title,
                ImageUrl = b.ImageUrl,
                LinkUrl = b.LinkUrl,
                LinkType = b.LinkType,
                Position = b.Position,
                SortOrder = b.SortOrder
            }).ToList(),
            TotalCount = items.Count
        };
    }
}