using CanteenContracts.BindingModels;
using CanteenContracts.BusinessLogicsContracts;
using CanteenContracts.SearchModel;
using CanteenContracts.StorageContracts;
using CanteenContracts.ViewModels;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CanteenBusinessLogic.BusinessLogics
{
    public class CookLogic : ICookLogic
    {
		private readonly ILogger _logger;
		private readonly ICookStorage _cookStorage;
		public CookLogic(ILogger<CookLogic> logger, ICookStorage cookStorage)
		{
			_logger = logger;
			_cookStorage = cookStorage;
		}

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

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

		public CookViewModel? ReadElement(CookSearchModel model)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			_logger.LogInformation("ReadElement. FIO:{FIO}.Id:{ Id}",
				model.CookFIO, model.Id);
			var element = _cookStorage.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<CookViewModel>? ReadList(CookSearchModel? model)
		{
			_logger.LogInformation("ReadList. FIO:{FIO}.Id:{ Id} ", model?.CookFIO, model?.Id);
			var list = (model == null) ? _cookStorage.GetFullList() :
			_cookStorage.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(CookBindingModel model)
		{
			CheckModel(model);
			if (_cookStorage.Update(model) == null)
			{
				_logger.LogWarning("Update operation failed");
				return false;
			}
			return true;
		}

		private void CheckModel(CookBindingModel model, bool withParams = true)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			if (!withParams)
			{
				return;
			}
			if (string.IsNullOrEmpty(model.Password))
			{
				throw new ArgumentNullException("Нет пароля сотрудника", nameof(model.CookFIO));
			}
			if (string.IsNullOrEmpty(model.CookFIO))
			{
				throw new ArgumentNullException("Нет фио сотрудника", nameof(model.CookFIO));
			}
			_logger.LogInformation("Employee. Id: {Id}, FIO: {FIO}", model.Id, model.CookFIO);
			var element = _cookStorage.GetElement(new CookSearchModel
			{
				CookFIO = model.CookFIO,
			});
			if (element != null && element.Id != model.Id)
			{
				throw new InvalidOperationException("Сотрудник с таким фио уже есть");
			}
		}
	}
}