import rdflib
from trygvis.eda import EdaException

KICAD = rdflib.Namespace("https://trygvis/purl/kicad#")
KICAD_RANDOM = rdflib.Namespace("https://trygvis/purl/kicad-random/")
KICAD_FOOTPRINT = rdflib.Namespace("https://trygvis/purl/kicad-footprints#")

# Namespace for all unknown kicad boards
KICAD_BOARD = rdflib.Namespace("https://trygvis/purl/kicad-board#")


def gen_random(key: object):
    s = str(key)

    if len(s) == 0:
        raise EdaException("Can't generate a random URI for empty strings.")

    s = str(abs(hash(s)))
    return KICAD_RANDOM.term(s)