# SPDX-License-Identifier: AGPL-3.0-or-later
"""Springer Nature (science)

"""

# pylint: disable=missing-function-docstring

from datetime import datetime
from json import loads
from urllib.parse import urlencode

from searx import logger
from searx.exceptions import SearxEngineAPIException

logger = logger.getChild('Springer Nature engine')

about = {
    "website": 'https://www.springernature.com/',
    "wikidata_id": 'Q21096327',
    "official_api_documentation": 'https://dev.springernature.com/',
    "use_official_api": True,
    "require_api_key": True,
    "results": 'JSON',
}

categories = ['science']
paging = True
nb_per_page = 10
api_key = 'unset'

base_url = 'https://api.springernature.com/metadata/json?'

def request(query, params):
    if api_key == 'unset':
        raise SearxEngineAPIException('missing Springer-Nature API key')
    args = urlencode({
        'q' : query,
        's' : nb_per_page * (params['pageno'] - 1),
        'p' : nb_per_page,
        'api_key' : api_key
        })
    params['url'] = base_url + args
    logger.debug("query_url --> %s", params['url'])
    return params


def response(resp):
    results = []
    json_data = loads(resp.text)

    for record in json_data['records']:
        content = record['abstract'][0:500]
        if len(record['abstract']) > len(content):
            content += "..."
        published = datetime.strptime(record['publicationDate'], '%Y-%m-%d')

        metadata = [record[x] for x in [
            'publicationName',
            'identifier',
            'contentType',
        ] if record.get(x) is not None]

        metadata = ' / '.join(metadata)
        if record.get('startingPage') and record.get('endingPage') is not None:
            metadata += " (%(startingPage)s-%(endingPage)s)" % record

        results.append({
            'title': record['title'],
            'url': record['url'][0]['value'].replace('http://', 'https://', 1),
            'content' : content,
            'publishedDate' : published,
            'metadata' : metadata
        })
    return results