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import sys
from typing import Iterable, Optional, Dict, Any
import csv

import ftfy

from chocula.util import clean_str, parse_country
from chocula.common import DirectoryLoader
from chocula.database import DirectoryInfo


class SherpaRomeoLoader(DirectoryLoader):
    """
    CSV Columns:

        #RoMEO Record ID,Publisher,Policy Heading,Country,RoMEO colour,Published Permission,Published Restrictions,Published Max embargo,Accepted Prmission,Accepted Restrictions,Accepted Max embargo,Submitted Permission,Submitted Restrictions,Submitted Max embargo,Open Access Publishing,Record Status,Updated

        #Journal Title,ISSN,ESSN,URL,RoMEO Record ID,Updated

    """

    source_slug = "sherpa_romeo"
    sherpa_policies: Dict[str, Any] = dict()

    def open_file(self) -> Iterable:

        # first load policies
        print("##### Loading SHERPA/ROMEO policies...", file=sys.stderr)
        fixed_policy_file = ftfy.fix_file(open(self.config.sherpa_romeo_policies_simple.filepath, 'rb'))
        policy_reader = csv.DictReader(fixed_policy_file)
        for row in policy_reader:
            self.sherpa_policies[row['RoMEO Record ID']] = row

        # then open regular file
        raw_file = open(self.config.sherpa_romeo_journals_simple.filepath, 'rb').read().decode(errors='replace')
        fixed_file = ftfy.fix_text(raw_file)
        return csv.DictReader(fixed_file.split('\n'))

    def parse_record(self, row) -> Optional[DirectoryInfo]:
        # super mangled :(

        row.update(self.sherpa_policies[row['RoMEO Record ID']])

        info = DirectoryInfo(
            directory_slug=self.source_slug,
            issnp=row['ISSN'],
            issne=row['ESSN'],
            name=clean_str(row['Journal Title']),
            publisher=clean_str(row['Publisher']),
            country=parse_country(row['Country']),
            custom_id=row['RoMEO Record ID'],
        )

        if row['RoMEO colour']:
            info.extra['sherpa_romeo'] = dict(color=row['RoMEO colour'])

        return info