from opendc.models_old.cpu import CPU
from opendc.util import exceptions
from opendc.util.rest import Response


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

    # 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 CPU and make sure it exists

    cpu = CPU.from_primary_key((request.params_path['id'], ))

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

    # Return this CPU

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