using MediatR;
using ExpenseTracker.Application.Common.Exceptions;
using ExpenseTracker.Application.Accounts.Commands.Delete;
using ExpenseTracker.Application.Common.Interfaces;

namespace ExpenseTracker.Application.Accountes.Commands.Delete;

public class DeleteAccountCommandHandler : IRequestHandler<DeleteAccountCommand>
{
    private readonly IUnitOfWork _unitOfWork;

    public DeleteAccountCommandHandler(IUnitOfWork unitOfWork)
    {
        _unitOfWork = unitOfWork;
    }

    public async Task Handle(DeleteAccountCommand request, CancellationToken cancellationToken)
    {
        var isEntityPresentInDatabase = _unitOfWork.AccountRepository.Queryable.Any(e => e.Id == request.Id);

        if (!isEntityPresentInDatabase)
        {
            throw new NotFoundException();
        }

        await _unitOfWork.AccountRepository.DeleteOneAsync(request.Id, cancellationToken);
        await _unitOfWork.TransactionRepository.DeleteManyAsync(e => e.AccountId.Equals(request.Id), cancellationToken);

        await _unitOfWork.SaveAsync(cancellationToken);
    }
}