using AutobusApi.Application.Common.Exceptions;
using AutobusApi.Application.Common.Interfaces;
using MediatR;
using Microsoft.EntityFrameworkCore;

namespace AutobusApi.Application.Countries.Commands.DeleteCountry;

public class DeleteCountryCommandHandler : IRequestHandler<DeleteCountryCommand>
{
    private readonly IApplicationDbContext _dbContext;

    public DeleteCountryCommandHandler(IApplicationDbContext dbContext)
    {
        _dbContext = dbContext;
    }

    public async Task Handle(
        DeleteCountryCommand request,
        CancellationToken cancellationToken)
    {
        var country = await _dbContext.Countries
            .SingleOrDefaultAsync(c => c.Id == request.Id, cancellationToken);

        if (country == null)
        {
            throw new NotFoundException();
        }

        _dbContext.Countries.Remove(country);

        await _dbContext.SaveChangesAsync(cancellationToken);
    }
}