import uuid
from typing import Optional, Union

# Values for `..#ee-component-type` facts
CAPACITOR = "http://purl.org/ee/part-type#capacitor"
RESISTOR = "http://purl.org/ee/part-type#resistor"
DIODE = "http://purl.org/ee/part-type#diode"
INDUCTOR = "http://purl.org/ee/part-type#inductor"
CRYSTAL = "http://purl.org/ee/part-type#inductor"
TRANSISTOR = "http://purl.org/ee/part-type#transistor"

NET_TIE = "http://purl.org/ee/part-type#net-tie"
TEST_POINT = "http://purl.org/ee/part-type#test-point"
MOUNTING_HOLE = "http://purl.org/ee/part-type#mounting-hole"

_DIGIKEY_FACT_KEY_PREFIX = "http://purl.org/ee/digikey-fact-key#"


def make_link_rel(cls):
    return "http://purl.org/ee/link-rel#{}".format(cls)


def make_digikey_fact_key(key: int) -> str:
    return _DIGIKEY_FACT_KEY_PREFIX + str(key)


def is_digikey_fact_key(uri: str) -> bool:
    return uri.startswith(_DIGIKEY_FACT_KEY_PREFIX)


def parse_digikey_fact_key(uri: str) -> Optional[int]:
    if uri.startswith(_DIGIKEY_FACT_KEY_PREFIX):
        try:
            return int(uri[len(_DIGIKEY_FACT_KEY_PREFIX):])
        except ValueError:
            pass


_FACT_KEY_PREFIX = "http://purl.org/trygvis/ee/fact-key#"


def make_fact_key(name: str) -> str:
    return "{}{}".format(_FACT_KEY_PREFIX, name)


def make_schematic_part_uri(project: Union[str, uuid.UUID], schematic_reference: str) -> str:
    return "http://purl.org/trygvis/ee/project/{}#{}".format(project, schematic_reference)