using DinerContracts.BindingModels;
using DinerContracts.BusinessLogicsContracts;
using DinerContracts.SearchModels;
using DinerContracts.StoragesContracts;
using DinerContracts.ViewModels;
using DocumentFormat.OpenXml.Vml.Spreadsheet;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DineryBusinessLogic.BusinessLogic {
	public class ClientLogic : IClientLogic {

		private readonly ILogger _logger;
		private readonly IClientStorage _storage;

		public ClientLogic(ILogger<ClientLogic> logger, IClientStorage storage) {
			_logger = logger;
			_storage = storage;
		}


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

		public bool Delete(ClientBindingModel model) {
			CheckModel(model, false);
			_logger.LogInformation($"Delete. ID:{model.ID}");
			if (_storage.Delete(model) == null) {
				_logger.LogWarning("Delete operation failed");
				return false;
			}
			return true;
		}

		public bool Update(ClientBindingModel model) {
			CheckModel(model);
			if (_storage.Update(model) == null) {
				_logger.LogWarning("Update operation failed");
				return false;
			}
			return true;
		}

		public ClientViewModel? ReadELement(ClientSearchModel model) {
			if (model == null) {
				throw new ArgumentNullException(nameof(model));
			}
			_logger.LogInformation($"ReadElement. Login:{model.ClientFIO}.ID:{model.ID}");
			var element = _storage.GetElement(model);
			if (element == null) {
				_logger.LogWarning("ReadElement. element not found");
				return null;
			}
			_logger.LogInformation($"ReadElement. find.ID:{element.ID}");
			return element;
		}

		public List<ClientViewModel>? ReadList(ClientSearchModel? model) {
			_logger.LogInformation($"ReadList. CLiendID:{model?.ID}");
			var list = model == null ? _storage.GetFullList() : _storage.GetFilteredList(model);
			if (list == null) {
				_logger.LogWarning("ReadList. return nell list");
				return null;
			}
			_logger.LogInformation($"ReadList. Count:{list.Count}");
			return list;
		}

		
		private void CheckModel(ClientBindingModel model, bool withParams = true) {
			if (model == null ) {
				throw new ArgumentNullException(nameof(model));
			}
			if (!withParams) {
				return;
			}
			if (string.IsNullOrEmpty(model.ClientFIO)) {
				throw new ArgumentNullException("Нет ФИО пользователя", nameof(model.ClientFIO));
			}
			if (string.IsNullOrEmpty(model.Email)) {
				throw new ArgumentNullException("Нет почты пользователя", nameof(model.Email));
			}
			if (string.IsNullOrEmpty(model.Password)) {
				throw new ArgumentNullException("Нет пароля пользователя", nameof(model.Password));
			}
			if (string.IsNullOrEmpty((model.ID).ToString())) {
				throw new ArgumentNullException("Нет ID пользователя", nameof(model.ID));
			}
			_logger.LogInformation($"Client. ID:{model.ID}.FIO:{model.ClientFIO}.Email:{model.Email}.Password:{model.Password}");
			var element = _storage.GetElement(new ClientSearchModel {
				ClientFIO = model.ClientFIO,
			});
			if (element != null && element.ClientFIO != model.ClientFIO) {
				throw new InvalidOperationException("Клиент с таким логином уже есть");
			}
		}
	}
}