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 CatergoryWorkLogic : ICategoryWorkLogic {

		private readonly ILogger _logger;
		private readonly ICategoryWorkStorage _storage;

		public CatergoryWorkLogic(ILogger logger, ICategoryWorkStorage storage) {
			_logger = logger;
			_storage = storage;
		}

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

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

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

		private void CheckModel(CategoryWorkBindingModel model, bool withParams = true) {
			if (model == null) {
				throw new ArgumentNullException(nameof(model));
			}
			if (!withParams) {
				return;
			}
			if (string.IsNullOrEmpty((model.Id).ToString())) {
				throw new ArgumentNullException("Нет Id категории", nameof(model.Id));
			}
			if (string.IsNullOrEmpty((model.ExecutorId).ToString())) {
				throw new ArgumentNullException("Нет Id исполнителя", nameof(model.ExecutorId));
			}
			if (string.IsNullOrEmpty(model.Name)) {
				throw new ArgumentNullException("Нет названия категории работы", nameof(model.Name));
			}
			_logger.LogInformation($"CategoryWork. Id:{model.Id}.Name:{model.Name}");

			var element = _storage.GetElement(new CategoryWorkSearchModel {
				Name = model.Name
			});
			if (element != null && element.Id != model.Id) {
				throw new InvalidOperationException("Категория с таким названием уже есть");
			}
		}
	}
}