using Microsoft.Extensions.Logging;
using ServiceStationContracts.BindingModels;
using ServiceStationContracts.BusinessLogicContracts;
using ServiceStationContracts.SearchModels;
using ServiceStationContracts.ViewModels;
using ServiceStationsContracts.StorageContracts;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ServiceSourceBusinessLogic.BusinessLogic {
	public class ExecutorLogic : IExecutorLogic {

		private readonly ILogger _logger;
		private readonly IExecutorStorage _storage;

		public ExecutorLogic(ILogger<IExecutorLogic> logger, IExecutorStorage storage) {
			_logger = logger;
			_storage = storage;
		}

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

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

		public ExecutorViewModel? ReadElement(ExecutorSearchModel model) {
			if (model == null) {
				throw new ArgumentNullException(nameof(model));
			}
			_logger.LogInformation($"ReadElement.Id:{model.Id}.Email:{model.Email}");
			var element = _storage.GetElement(model);
			if (element == null) {
				_logger.LogWarning("ReadElement.Element not fount");
				return null;
			}
			_logger.LogInformation($"ReadElement.Find.Id:{element.Id}");
			return element;
		}

		public List<ExecutorViewModel>? ReadList() {
			var list = _storage.GetFullList();
			if (list == null) {
				_logger.LogWarning("ReadList return null list");
				return null;
			}
			_logger.LogInformation($"ReadList.Count:{list.Count}");
			return list;
		}

		private void CheckModel(ExecutorBindingModel model, bool withParams = true) {
			if (string.IsNullOrEmpty(model.Id.ToString())) {
				throw new ArgumentNullException("Нет номера исполнителя", nameof(model.Id));
			}
			if (!withParams) {
				return;
			}
			if (string.IsNullOrEmpty((model.Id).ToString())) {
				throw new ArgumentNullException("Нет Id исполнителя", nameof(model.Id));
			}
			if (string.IsNullOrEmpty(model.Email)) {
				throw new ArgumentNullException("Нет почты исполнителя", nameof(model.Email));
			}
			if (string.IsNullOrEmpty(model.Password)) {
				throw new ArgumentNullException("Нет пароля исполнителя", nameof(model.Password));
			}
			if (string.IsNullOrEmpty(model.FIO)) {
				throw new ArgumentNullException("Нет ФИО исполнителя", nameof(model.FIO));
			}
			_logger.LogInformation($"Executor.Id:{model.Id}.Email:{model.Email}.Password:{model.Password}.FIO:{model.FIO}");

			var element = _storage.GetElement(new ExecutorSearchModel { Email = model.Email });
			if (element != null && element.Id != model.Id) {
				throw new InvalidOperationException("Такая почта уже занята");
			}
		}
	}
}