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

namespace UniversityBuisnessLogic
{
    public class ExaminationResultLogic : IExaminationResultLogic
    {
        private readonly ILogger _logger;
        private readonly IExaminationResultStorage _examinationResultStorage;

        public ExaminationResultLogic(ILogger<ExaminationResultLogic> logger, IExaminationResultStorage examinationResultStorage)
        {
            _logger = logger;
            _examinationResultStorage = examinationResultStorage;
        }

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

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

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

        public List<ExaminationResultViewModel>? ReadList(ExaminationResultSearchModel? model)
        {
            _logger.LogInformation("ReadList. Id:{Id}", model?.Id);
            var list = model == null ? _examinationResultStorage.GetFullList() : _examinationResultStorage.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(ExaminationResultBindingModel model)
        {
            CheckModel(model);
            if (_examinationResultStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }

        private void CheckModel(ExaminationResultBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.ExaminationForm))
            {
                throw new ArgumentNullException("Нет формы испытания", nameof(model.ExaminationForm));
            }

            _logger.LogInformation("ExaminationResult. ExaminationForm: {ExaminationForm}. Id: {Id}", model.ExaminationForm, model.Id);
        }
    }
}