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import sys
import json
import itertools
import fatcat_client
from .common import FatcatImporter

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(FatcatImporter):

    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)

    def parse_orcid_dict(self, obj):
        """
        obj is a python dict (parsed from json).
        returns a CreatorEntity
        """
        name = obj['person']['name']
        if name is None:
            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
            else:
                # 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=given,
            surname=sur,
            display_name=display,
            extra=extra)
        return ce

    def create_row(self, row, editgroup_id=None):
        obj = json.loads(row)
        ce = self.parse_orcid_dict(obj)
        if ce is not None:
            self.api.create_creator(ce, editgroup_id=editgroup_id)
            self.counts['insert'] += 1

    def create_batch(self, batch):
        """Reads and processes in batches (not API-call-per-line)"""
        objects = [self.parse_orcid_dict(json.loads(l))
                   for l in batch if l != None]
        objects = [o for o in objects if o != None]
        self.api.create_creator_batch(objects, autoaccept="true")
        self.counts['insert'] += len(objects)