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

namespace HospitalBusinessLogic.BusinessLogics
{
    public class CourseLogic : ICourseLogic
    {
        private ILogger _logger;
        private ICourseStorage _courseStorage;

        public CourseLogic(ILogger logger, ICourseStorage courseStorage)
        {
            _logger = logger;
            _courseStorage = courseStorage;
        }

        public bool Create(CourseBindingModel model)
        {
            CheckModel(model);
            if (_courseStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

        public bool Delete(CourseBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation("Delete. Id:{Id}", model.Id);
            if (_courseStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }

        public CourseViewModel? ReadElement(CourseSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. Id:{Id}", model.Id);
            var element = _courseStorage.GetElement(model);
            if (element == null)
            {
                _logger.LogWarning("ReadElement element not found");
                return null;
            }
            _logger.LogInformation("ReadElement. Id:{Id}", element.Id);
            return element;
        }

        public List<CourseViewModel>? ReadList(CourseSearchModel? model)
        {
            _logger.LogInformation("ReadList. Id:{Id}", model?.Id);
            var list = model == null ? _courseStorage.GetFullList() : _courseStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }

        public bool Update(CourseBindingModel model)
        {
            CheckModel(model);
            if (_courseStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }
        private void CheckModel(CourseBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (model.Days < 1)
            {
                throw new ArgumentNullException("Количество дней приема должно быть не меньше 1", nameof(model.Days));
            }
            if (model.PillsInDay < 1)
            {
                throw new ArgumentNullException("Количество препарата в день должно быть не меньше 1", nameof(model.PillsInDay));
            }
            _logger.LogInformation("Course. Id: {Id}", model.Id);
        }
    }
}