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

namespace ComputerShopBusinessLogic.BusinessLogics
{
	public class Batch : IBatchLogic
	{
		private readonly ILogger _logger;
		private readonly IBatchStorage _batchStorage;

		public Batch(ILogger<Batch> logger, IBatchStorage batchStorage)
		{
			_logger = logger;
			_batchStorage = batchStorage;
		}

		public List<BatchViewModel> ReadList(BatchSearchModel? model)
		{
			var list = (model == null) ? _batchStorage.GetFullList() : _batchStorage.GetFilteredList(model);
			if (list == null)
			{
				_logger.LogWarning("Read null list");
				return null;
			}
			return list;
		}

		public BatchViewModel? ReadElement(BatchSearchModel model)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			var batch = _batchStorage.GetElement(model);
			if (batch == null)
			{
				_logger.LogWarning("ReadElement batch not found");
				return null;
			}
			return batch;
		}

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

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

		public bool Delete(BatchBindingModel model)
		{
			CheckModel(model, false);
			_logger.LogInformation("Delete. Id:{Id}", model.Id);
			if (_batchStorage.Delete(model) == null)
			{
				_logger.LogWarning("Delete failed");
				return false;
			}
			return true;
		}

		private void CheckModel(BatchBindingModel model, bool withParams = true)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			if (!withParams)
			{
				return;
			}
		}
	}
}