using HotelContracts.BindingModels;
using HotelContracts.BusinessLogicsContracts;
using HotelContracts.SearchModels;
using HotelContracts.StoragesContracts;
using HotelContracts.ViewModels;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace HotelBusinessLogic.BusinessLogic
{
	public class AdministratorLogic : IAdministratorLogic
	{
		private readonly int _loginMaxLength = 25;
		private readonly int _passwordMaxLength = 50;
		private readonly ILogger _logger;
		private readonly IAdministratorStorage _administratorStorage;

		public AdministratorLogic(ILogger<AdministratorLogic> logger, IAdministratorStorage administratorStorage)
		{
			_logger = logger;
			_administratorStorage = administratorStorage;
		}

		public List<AdministratorViewModel>? ReadList(AdministratorSearchModel? model)
		{
			_logger.LogInformation("ReadList. AdministratorFIO: {AdministratorFIO}.  AdministratorLogin: {AdministratorLogin}. Id: {Id}", model?.AdministratorFIO, model?.AdministratorLogin, model?.Id);
			var list = model == null ? _administratorStorage.GetFullList() : _administratorStorage.GetFilteredList(model);
			if (list == null)
			{
				_logger.LogWarning("ReadList return null list");
				return null;
			}
			_logger.LogInformation("ReadList. Count: {Count}", list.Count);
			return list;
		}
		public AdministratorViewModel? ReadElement(AdministratorSearchModel model)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}

			_logger.LogInformation("ReadElement. AdministratorFIO: {AdministratorFIO}. AdministratorLogin: {AdministratorLogin}. Id: {Id}.", model.AdministratorFIO, model.AdministratorLogin, model.Id);

			var element = _administratorStorage.GetElement(model);

			if (element == null)
			{
				_logger.LogWarning("ReadElement element not found");
				return null;
			}

			_logger.LogInformation("ReadElement find. Id: {Id}", element.Id);

			return element;
		}
		public bool Create(AdministratorBindingModel model)
		{
			CheckModel(model);
			if (_administratorStorage.Insert(model) == null)
			{
				_logger.LogWarning("Insert operation failed");

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

				return false;
			}

			return true;
		}
		private void CheckModel(AdministratorBindingModel model, bool withParams = true)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}

			if (!withParams)
			{
				return;
			}
			if (string.IsNullOrEmpty(model.AdministratorFIO))
			{
				throw new ArgumentNullException("Нет ФИО администратора", nameof(model.AdministratorFIO));
			}
			if (string.IsNullOrEmpty(model.AdministratorLogin))
			{
				throw new ArgumentNullException("Нет логина администратора", nameof(model.AdministratorLogin));
			}
			if (model.AdministratorLogin.Length > _loginMaxLength)
			{
				throw new ArgumentNullException("Логин превышает допустимое количество символов", nameof(model.AdministratorLogin));
			}
			if (string.IsNullOrEmpty(model.AdministratorPhone))
			{
				throw new ArgumentNullException("Нет номера телефона администратора", nameof(model.AdministratorPhone));
			}
			if (string.IsNullOrEmpty(model.AdministratorEmail))
			{
				throw new ArgumentNullException("Нет эл. почты администратора", nameof(model.AdministratorEmail));
			}
			if (string.IsNullOrEmpty(model.AdministratorPassword))
			{
				throw new ArgumentNullException("Нет пароля администратора", nameof(model.AdministratorPassword));
			}
			if (model.AdministratorPassword.Length > _passwordMaxLength)
			{
				throw new ArgumentNullException("Пароль превышает допустимое количество символов", nameof(model.AdministratorPassword));
			}
			_logger.LogInformation("Administrator. AdministratorFIO: {AdministratorFIO}. AdministratorLogin: {AdministratorLogin}. AdministratorPhone: {AdministratorPhone}.AdministratorEmail: {AdministratorEmail}.AdministratorPassword: {AdministratorPassword}.Id: {Id}", 
				model.AdministratorFIO, model.AdministratorLogin, model.AdministratorPhone, model.AdministratorEmail, model.AdministratorPassword, model.Id);
			
			var elementEmail = _administratorStorage.GetElement(new AdministratorSearchModel
			{
				AdministratorEmail = model.AdministratorEmail
			});
			if (elementEmail != null && elementEmail.Id != model.Id)
			{
				throw new InvalidOperationException("Администратор с такой почтой уже есть");
			}

			var elementLogin = _administratorStorage.GetElement(new AdministratorSearchModel
			{
				AdministratorLogin = model.AdministratorLogin
			});
			if (elementLogin != null && elementLogin.Id != model.Id)
			{
				throw new InvalidOperationException("Администратор с таким логином уже есть");
			}
		}
	}
}