import schemeld
import urllib
import json

def determine_concepts_internal(json, context, outputs):
    if isinstance(json, list):
        for m in json:
            determine_concepts_internal(m, context, outputs)
        return

    assert isinstance(json, dict), type(json)
    context = urllib.parse.urlparse(json.get('@context', context))
    assert context.netloc == 'schema.org'

    if '@graph' in json:
        determine_concepts_internal(json['@graph'], context, outputs)
    else:
        outputs.append(schemeld.Concept(context, json))

def determine_concepts(json):
    concepts = []
    determine_concepts_internal(json, '', concepts)
    return concepts

def determine_concepts_in_soup(soup):
    # TODO: Check type
    ld_json_elements = soup.find_all('script', type="application/ld+json")
    concepts = []
    for e in ld_json_elements:
        json_data = json.loads(e.string)
        concepts.extend(determine_concepts(json_data))
    return concepts