namespace Diligent.WebAPI.Business.Services
{
    public class InsurersService : IInsurersService
    {
        private readonly DatabaseContext _context;
        private readonly IMapper _mapper;

        public InsurersService(DatabaseContext context, IMapper mapper)
        {
            _context = context;
            _mapper = mapper;
        }

        public async Task<List<InsurerViewDto>> GetInsurers()
        {
            var insurers = await _context.Insurers.Include(x => x.InsuranceCompany).ToListAsync();
            return _mapper.Map<List<InsurerViewDto>>(insurers);
        }

        public async Task<InsurerViewDto?> GetInsurer(long id)
        {
            var insurer = await _context.Insurers
                .Include(x => x.InsuranceCompany)
                .FirstOrDefaultAsync(x => x.Id == id);

            if (insurer == null)
                throw new EntityNotFoundException("Insurer not found");

            return _mapper.Map<InsurerViewDto>(insurer);
        }

        public async Task CreateInsurer(InsurerCreateDto insurerCreateDto)
        {
            var insurer = _mapper.Map<Insurer>(insurerCreateDto);
            await _context.Insurers.AddAsync(insurer);

            await _context.SaveChangesAsync();
        }

        public async Task UpdateInsurer(long insurerId, InsurerUpdateDto insurerUpdateDto)
        {
            var insurer = _context.InsurancePolicies.Find(insurerId);
            if (insurer == null)
                throw new EntityNotFoundException("Insurer not found");

            _mapper.Map(insurerUpdateDto, insurer);
            insurer.UpdatedAtUtc = DateTime.UtcNow;

            _context.Entry(insurer).State = EntityState.Modified;
            await _context.SaveChangesAsync();
        }

        public async Task DeleteInsurerAsync(long insurerId)
        {
            var insurer = _context.InsurancePolicies.Find(insurerId);
            if (insurer == null)
                throw new EntityNotFoundException("Insurer not found");

            _context.Remove(insurer);
            await _context.SaveChangesAsync();
        }
    }
}