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import sys
import json
import itertools
import fatcat_client
from .common import EntityImporter, clean

def value_or_none(e):
    if type(e) == dict:
        e = e.get('value')
    if type(e) == str and len(e) == 0:
        e = None
    # TODO: this is probably bogus; patched in desperation; remove?
    if e:
        try:
            e.encode()
        except UnicodeEncodeError:
            # Invalid JSON?
            print("BAD UNICODE")
            return None
    return e

class OrcidImporter(EntityImporter):

    def __init__(self, api, **kwargs):

        eg_desc = kwargs.get('editgroup_description',
            "Automated import of ORCID metadata, from official bulk releases.")
        eg_extra = kwargs.get('editgroup_extra', dict())
        eg_extra['agent'] = eg_extra.get('agent', 'fatcat_tools.OrcidImporter')
        super().__init__(api,
            editgroup_description=eg_desc,
            editgroup_extra=eg_extra,
            **kwargs)

    def want(self, raw_record):
        return True

    def parse_record(self, obj):
        """
        obj is a python dict (parsed from json).
        returns a CreatorEntity
        """
        name = obj['person']['name']
        if not name:
            return None
        extra = None
        given = value_or_none(name.get('given-names'))
        sur = value_or_none(name.get('family-name'))
        display = value_or_none(name.get('credit-name'))
        if display is None:
            # TODO: sorry human beings
            if given and sur:
                display = "{} {}".format(given, sur)
            elif sur:
                display = sur
            elif given:
                display = given
        if not display:
            # must have *some* name
            return None
        orcid = obj['orcid-identifier']['path']
        if not self.is_orcid(orcid):
            sys.stderr.write("Bad ORCID: {}\n".format(orcid))
            return None
        ce = fatcat_client.CreatorEntity(
            orcid=orcid,
            given_name=clean(given),
            surname=clean(sur),
            display_name=clean(display),
            extra=extra)
        return ce

    def try_update(self, raw_record):
        existing = None
        try:
            existing = self.api.lookup_creator(orcid=raw_record.orcid)
        except fatcat_client.rest.ApiException as err:
            if err.status != 404:
                raise err

        # eventually we'll want to support "updates", but for now just skip if
        # entity already exists
        if existing:
            self.counts['exists'] += 1
            return False
        
        return True

    def insert_batch(self, batch):
        self.api.create_creator_batch(batch,
            autoaccept=True,
            description=self.editgroup_description,
            extra=json.dumps(self.editgroup_extra))