from opendc.models.gpu import GPU
from opendc.util import exceptions
from opendc.util.rest import Response


def GET(request):
    """Get the specs of a GPU."""

    # Make sure required parameters are there

    try:
        request.check_required_parameters(path={'id': 'int'})

    except exceptions.ParameterError as e:
        return Response(400, str(e))

    # Instantiate a GPU and make sure it exists

    gpu = GPU.from_primary_key((request.params_path['id'], ))

    if not gpu.exists():
        return Response(404, '{} not found.'.format(gpu))

    # Return this GPU

    return Response(200, 'Successfully retrieved {}.'.format(gpu), gpu.to_JSON())