from pathlib import Path

from ee.part import PartDb, load_db, save_db, Part, fact_keys
from ee.xml import types, uris

__all__ = ["pn_part_search_list"]

ignored_part_classes = [
    "mechanical"
]


def valid_pns(part: Part):
    """Check if the part has any MPNs or SPNs"""
    return len(part.get_mpns()) > 0 or len(part.get_spns()) > 0


def get_value(part: Part):
    """Check if the part has a value and it is not a resistor, capacitor or inductor. Their value is not useful for a
    part number-based lookup"""
    value = part.find_fact(uris.make_fact_key("value"))

    if value is None:
        return

    typ = part.find_fact(uris.make_fact_key("type"))
    if typ is None:
        return

    # if type is Zener, it's value could be a voltage

    return value.valueProp if typ.valueProp not in (uris.RESISTOR, uris.CAPACITOR, uris.INDUCTOR) else None


def pn_part_search_list(in_path: Path, out_path: Path, supplier: str):
    in_parts = load_db(in_path)
    out_parts = PartDb()

    count = 0
    skipped = list()
    for xml in in_parts.iterparts():
        count += 1
        part = Part(xml)

        refs = [ref.referenceProp for ref in part.get_schematic_references()]

        part_class = part.find_fact(fact_keys.part_class)
        if part_class:
            if part_class.valueProp in ignored_part_classes:
                skipped.append(refs)
                continue

        if not valid_pns(part):
            value = get_value(part)
            if not value:
                skipped.append(refs)
                continue

            # Use the value of the component as a part number to search for
            xml.referencesProp.part_number.append(types.PartNumber(value=value))

        new_part = types.Part()
        new_part.referencesProp = xml.referencesProp

        out_parts.add_entry(new_part, True)

    if len(skipped) > 0:
        print("Skipped {} of {} parts".format(len(skipped), count))

    save_db(out_path, out_parts)