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

namespace TaskTrackerBusinessLogic
{
	public class TaskAssigmentLogic :ITaskAssigmentLogic
	{
		private readonly ILogger _logger;
		private readonly ITaskAssigmentStorage _taskAssigmentStorage;
		public TaskAssigmentLogic(ILogger<TaskAssigmentLogic> logger, ITaskAssigmentStorage
	   taskAssigmentStorage)
		{
			_logger = logger;
			_taskAssigmentStorage = taskAssigmentStorage;
		}
		public List<TaskAssigmentViewModel>? ReadList(TaskAssigmentSearchModel? model)
		{
			
			var list = model == null ? _taskAssigmentStorage.GetFullList() :
	_taskAssigmentStorage.GetFilteredList(model);
			if (list == null)
			{
				_logger.LogWarning("ReadList return null list");
				return null;
			}
			_logger.LogInformation("ReadList. Count:{Count}", list.Count);
			return list;
		}
		public List<TaskViewModel>? ReadFilteredEmployeeList(EmployeeSearchModel? model)
		{

			var list = _taskAssigmentStorage.GetFilteredAssigmentList(model);
			if (list == null)
			{
				_logger.LogWarning("ReadList return null list");
				return null;
			}
			_logger.LogInformation("ReadList. Count:{Count}", list.Count);
			return list;
		}
		public TaskAssigmentViewModel? ReadElement(TaskAssigmentSearchModel model)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			
			var element = _taskAssigmentStorage.GetElement(model);
			if (element == null)
			{
				_logger.LogWarning("ReadElement element not found");
				return null;
			}
		
			return element;
		}
		public bool Create(TaskAssigmentBindingModel model)
		{
			CheckModel(model);
			if (_taskAssigmentStorage.Insert(model) == null)
			{
				_logger.LogWarning("Insert operation failed");
				return false;
			}
			return true;

		}
		public bool Update(TaskAssigmentBindingModel model)
		{
			CheckModel(model);
			if (_taskAssigmentStorage.Update(model) == null)
			{
				_logger.LogWarning("Update operation failed");
				return false;
			}
			return true;
		}
		public bool Delete(TaskAssigmentBindingModel model)
		{
			CheckModel(model, false);
		
			if (_taskAssigmentStorage.Delete(model) == null)
			{
				_logger.LogWarning("Delete operation failed");
				return false;
			}
			return true;
		}
		private void CheckModel(TaskAssigmentBindingModel model, bool withParams =
	   true)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			if (!withParams)
			{
				return;
			}
			if (string.IsNullOrEmpty(model.Role))
			{
				throw new ArgumentNullException("Нет имени",
			   nameof(model.Role));
			}
			

			var element = _taskAssigmentStorage.GetElement(new TaskAssigmentSearchModel
			{
				TaskId = model.TaskId,
				EmployeeId = model.EmployeeId
				
			});
			
		}
	}
}