ProektstuZhenechka/TheCatHasPawsProject/CatHasPawsDatabase/Implementations/BuyerStorageContract.cs

using AutoMapper;
using CatHasPawsContratcs.DataModels;
using CatHasPawsContratcs.Exceptions;
using CatHasPawsContratcs.StoragesContracts;
using CatHasPawsDatabase.Models;
using Microsoft.EntityFrameworkCore;
using Npgsql;

namespace CatHasPawsDatabase.Implementations;

internal class BuyerStorageContract : IBuyerStorageContract
{
	private readonly CatHasPawsDbContext _dbContext;
	private readonly Mapper _mapper;

	public BuyerStorageContract(CatHasPawsDbContext catHasPawsDbContext)
	{
		_dbContext = catHasPawsDbContext;
		var config = new MapperConfiguration(cfg =>
		{
			cfg.CreateMap<Buyer, BuyerDataModel>();
			cfg.CreateMap<BuyerDataModel, Buyer>();
		});
		_mapper = new Mapper(config);
	}

	public List<BuyerDataModel> GetList()
	{
		try
		{
			return [.. _dbContext.Buyers.Select(x => _mapper.Map<BuyerDataModel>(x))];
		}
		catch (Exception ex)
		{
			_dbContext.ChangeTracker.Clear();
			throw new StorageException(ex);
		}
	}

	public BuyerDataModel? GetElementById(string id)
	{
		try
		{
			return _mapper.Map<BuyerDataModel>(GetBuyerById(id));
		}
		catch (Exception ex)
		{
			_dbContext.ChangeTracker.Clear();
			throw new StorageException(ex);
		}
	}

	public BuyerDataModel? GetElementByFIO(string fio)
	{
		try
		{
			return _mapper.Map<BuyerDataModel>(_dbContext.Buyers.FirstOrDefault(x => x.FIO == fio));
		}
		catch (Exception ex)
		{
			_dbContext.ChangeTracker.Clear();
			throw new StorageException(ex);
		}
	}

	public BuyerDataModel? GetElementByPhoneNumber(string phoneNumber)
	{
		try
		{
			return _mapper.Map<BuyerDataModel>(_dbContext.Buyers.FirstOrDefault(x => x.PhoneNumber == phoneNumber));
		}
		catch (Exception ex)
		{
			_dbContext.ChangeTracker.Clear();
			throw new StorageException(ex);
		}
	}

	public void AddElement(BuyerDataModel buyerDataModel)
	{
		try
		{
			_dbContext.Buyers.Add(_mapper.Map<Buyer>(buyerDataModel));
			_dbContext.SaveChanges();
		}
		catch (InvalidOperationException ex) when (ex.TargetSite?.Name == "ThrowIdentityConflict")
		{
			_dbContext.ChangeTracker.Clear();
			throw new ElementExistsException("Id", buyerDataModel.Id);
		}
		catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Buyers_PhoneNumber" })
		{
			_dbContext.ChangeTracker.Clear();
			throw new ElementExistsException("PhoneNumber", buyerDataModel.PhoneNumber);
		}
		catch (Exception ex)
		{
			_dbContext.ChangeTracker.Clear();
			throw new StorageException(ex);
		}
	}

	public void UpdElement(BuyerDataModel buyerDataModel)
	{
		try
		{
			var element = GetBuyerById(buyerDataModel.Id) ?? throw new ElementNotFoundException(buyerDataModel.Id);
			_dbContext.Buyers.Update(_mapper.Map(buyerDataModel, element));
			_dbContext.SaveChanges();
		}
		catch (ElementNotFoundException)
		{
			_dbContext.ChangeTracker.Clear();
			throw;
		}
		catch (DbUpdateException ex) when (ex.InnerException is PostgresException { ConstraintName: "IX_Buyers_PhoneNumber" })
		{
			_dbContext.ChangeTracker.Clear();
			throw new ElementExistsException("PhoneNumber", buyerDataModel.PhoneNumber);
		}
		catch (Exception ex)
		{
			_dbContext.ChangeTracker.Clear();
			throw new StorageException(ex);
		}
	}

	public void DelElement(string id)
	{
		try
		{
			var element = GetBuyerById(id) ?? throw new ElementNotFoundException(id);
			_dbContext.Buyers.Remove(element);
			_dbContext.SaveChanges();
		}
		catch (ElementNotFoundException)
		{
			_dbContext.ChangeTracker.Clear();
			throw;
		}
		catch (Exception ex)
		{
			_dbContext.ChangeTracker.Clear();
			throw new StorageException(ex);
		}
	}

	private Buyer? GetBuyerById(string id) => _dbContext.Buyers.FirstOrDefault(x => x.Id == id);
}