using Microsoft.Extensions.Logging;
using UniversityContracts.BindingModels;
using UniversityContracts.BusinessLogicsContracts;
using UniversityContracts.SearchModels;
using UniversityContracts.StoragesContracts;
using UniversityContracts.ViewModels;

namespace UniversityBusinessLogic.BusinessLogics
{
    public class DirectionLogic : IDirectionLogic
    {
        private readonly IDirectionStorage _directionStorage;
        public DirectionLogic(IDirectionStorage directionStorage)
        {
            _directionStorage = directionStorage;
        }

        public void CreateOrUpdate(DirectionBindingModel model)
        {
            var element = _directionStorage.GetElement(
               new DirectionBindingModel
               {
                   Name = model.Name
               });
            if (element != null && element.Id != model.Id)
            {
                throw new Exception("Такое направление уже существует");
            }
            if (model.Id.HasValue)
            {
                _directionStorage.Update(model);
            }
            else
            {
                _directionStorage.Insert(model);
            }
        }

        public void Delete(DirectionBindingModel model)
        {
            var element = _directionStorage.GetElement(new DirectionBindingModel { Id = model.Id });
            if (element == null)
            {
                throw new Exception("Направление не найдено");
            }
            _directionStorage.Delete(model);
        }

        public List<DirectionViewModel> Read(DirectionBindingModel model)
        {
            if (model == null)
            {
                return _directionStorage.GetFullList();
            }
            if (!string.IsNullOrEmpty(model.Name))
            {
                return new List<DirectionViewModel> { _directionStorage.GetElement(model) };
            }
            return _directionStorage.GetFilteredList(model);
        }
    }
}