using Microsoft.Extensions.Logging;
using VeterinaryContracts.BindingModels;
using VeterinaryContracts.BusinessLogicContracts;
using VeterinaryContracts.SearchModels;
using VeterinaryContracts.StorageContracts;
using VeterinaryContracts.ViewModels;

namespace VeterinaryBusinessLogic.BusinessLogic
{
	public class VisitLogic : IVisitLogic
	{
		private readonly ILogger _logger;
		private readonly IVisitStorage _visitStorage;

		public VisitLogic(ILogger<VisitLogic> logger, IVisitStorage visitStorage)
		{
			_logger = logger;
			_visitStorage = visitStorage;
		}

		public VisitViewModel? ReadElement(VisitSearchModel model)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			_logger.LogInformation("ReadElement. VisitName:{VisitName} Id:{ Id}", model.VisitName, model.Id);
			var element = _visitStorage.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<VisitViewModel>? ReadList(VisitSearchModel? model)
		{
			_logger.LogInformation("ReadList. VisitName:{VisitName} Id:{ Id}", model?.VisitName, model?.Id);
			var list = model == null ? _visitStorage.GetFullList() : _visitStorage.GetFilteredList(model);
			if (list == null)
			{
				_logger.LogWarning("ReadList return null list");
				return null;
			}
			_logger.LogInformation("ReadList. Count:{Count}", list.Count);
			return list;
		}

		public bool Create(VisitBindingModel model)
		{
			CheckModel(model);
			if (_visitStorage.Insert(model) == null)
			{
				_logger.LogWarning("Insert operation failed");
				return false;
			}
			return true;
		}
		public bool Update(VisitBindingModel model)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			if (string.IsNullOrEmpty(model.VisitName))
			{
				throw new ArgumentNullException("Нет названия визита", nameof(model.VisitName));
			}
			var element = _visitStorage.GetElement(new VisitSearchModel
			{
				VisitName = model.VisitName
			});
			if (element != null && element.Id != model.Id)
			{
				throw new InvalidOperationException("Визит с таким названием уже есть");
			}
			if (_visitStorage.Update(model) == null)
			{
				_logger.LogWarning("Update operation failed");
				return false;
			}
			return true;
		}
		public bool Delete(VisitBindingModel model)
		{
			CheckModel(model, false);
			_logger.LogInformation("Delete. Id:{Id}", model.Id);
			if (_visitStorage.Delete(model) == null)
			{
				_logger.LogWarning("Delete operation failed");
				return false;
			}
			return true;
		}
		private void CheckModel(VisitBindingModel model, bool withParams = true)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			if (!withParams)
			{
				return;
			}
			if (string.IsNullOrEmpty(model.VisitName))
			{
				throw new ArgumentNullException("Нет названия визита", nameof(model.VisitName));
			}
			if (model.DateVisit == null)
			{
				throw new ArgumentNullException("Нет времени визита",
			   nameof(model.DateVisit));
			}
			if (model.DateVisit <= DateTime.Now)
			{
				throw new ArgumentNullException("Дата визита не должна быть в прошлом", nameof(model.DateVisit));
			}
			_logger.LogInformation("Visit. Visit:{NameVisit}. DateVisit:{ DateVisit}. Id: { Id}", model.VisitName, model.DateVisit, model.Id);
			var element = _visitStorage.GetElement(new VisitSearchModel
			{
				VisitName = model.VisitName
			});
			//if (element != null && element.Id != model.Id)
			//{
			//	throw new InvalidOperationException("Визит с таким названием уже есть");
			//}
		}
	}
}