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

namespace SPMS.Application.Services;

public class FaqService : IFaqService
{
    private readonly IFaqRepository _faqRepository;
    private readonly IServiceRepository _serviceRepository;

    public FaqService(IFaqRepository faqRepository, IServiceRepository serviceRepository)
    {
        _faqRepository = faqRepository;
        _serviceRepository = serviceRepository;
    }

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

        var items = await _faqRepository.GetActiveListAsync(service.Id, request.Category);

        return new FaqListResponseDto
        {
            Items = items.Select(f => new FaqItemDto
            {
                FaqId = f.Id,
                Category = f.Category,
                Question = f.Question,
                Answer = f.Answer,
                SortOrder = f.SortOrder
            }).ToList(),
            TotalCount = items.Count
        };
    }
}