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

namespace ServiceSourceBusinessLogic.BusinessLogic {
	public class WorkLogic : IWorkLogic {

		private readonly ILogger _logger;
		private readonly IWorkStorage _storage;

		private WorkLogic(ILogger logger, IWorkStorage storage) {
			_logger = logger;
			_storage = storage;
		}

		public bool Create(WorkBindingModel model) {
			CheckModel(model);
			model.Status = WorkStatus.Принят;
			if (_storage.Insert(model) == null) {
				_logger.LogInformation("Insert operation failed");
				return false;
			}
			return true;
		}

		public bool FinishWork(WorkBindingModel model) {
			return StatusUpdate(model, WorkStatus.Готов);
		}

		public bool IssuedWork(WorkBindingModel model) {
			return StatusUpdate(model, WorkStatus.Выдан);
		}

		public bool TakeWorkInWork(WorkBindingModel model) {
			return StatusUpdate(model, WorkStatus.Выполняется);
		}

		public List<WorkViewModel>? ReadList(WorkSearchModel? model = null) {
			throw new NotImplementedException();
		}

		private void CheckModel(WorkBindingModel 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 работы", nameof(model.Id));
			}
			if (string.IsNullOrEmpty((model.ExecutorId).ToString())) {
				throw new ArgumentNullException("Нет Id исполнителя", nameof(model.ExecutorId));
			}
			if (string.IsNullOrEmpty((model.ReportId).ToString())) {
				throw new ArgumentNullException("Нет Id работы", nameof(model.ReportId));
			}
			if (string.IsNullOrEmpty((model.CategoryWorkId).ToString())) {
				throw new ArgumentNullException("Нет Id категории работы", nameof(model.CategoryWorkId));
			}
			if (model.Price <= 0) {
				throw new ArgumentNullException("Цена за работу должна быть больше 0", nameof(model.Price));
			}
			_logger.LogInformation($"Work. Id:{model.Id}.Price.{model.Price}.Status:{model.Status}.ExecutorId:{model.ExecutorId}" +
									$"ReportId:{model.ReportId}.CategoryWordId:{model.CategoryWorkId}");
		}
		private bool StatusUpdate(WorkBindingModel model, WorkStatus newOrderStatus) {
			CheckModel(model, false);
			var viewModel = _storage.GetElement(new WorkSearchModel { Id = model.Id });
			if (viewModel == null) {
				throw new ArgumentNullException(nameof(model));
			}
			if (viewModel.Status + 1 != newOrderStatus) {
				_logger.LogWarning("Status update to " + newOrderStatus.ToString() + " operation failed.");
				return false;
			}
			model.Status = newOrderStatus;
			if (_storage.Update(model) == null) {
				_logger.LogWarning("Update operarion failed");
				return false;
			}
			return true;
		}
	}
}