# Source code for searx.engines.bing_news

    # SPDX-License-Identifier: AGPL-3.0-or-later
    """Bing-News: description see :py:obj:`searx.engines.bing`.

    .. hint::

       Bing News is *different* in some ways!

    """

    # pylint: disable=invalid-name

    from typing import TYPE_CHECKING
    from urllib.parse import urlencode

    from lxml import html

    from searx.utils import eval_xpath, extract_text, eval_xpath_list, eval_xpath_getindex
    from searx.enginelib.traits import EngineTraits
    from searx.engines.bing import set_bing_cookies

    if TYPE_CHECKING:
        import logging

        logger: logging.Logger

    traits: EngineTraits

    # about
    about = {
        "website": 'https://www.bing.com/news',
        "wikidata_id": 'Q2878637',
        "official_api_documentation": 'https://www.microsoft.com/en-us/bing/apis/bing-news-search-api',
        "use_official_api": False,
        "require_api_key": False,
        "results": 'RSS',
    }

    # engine dependent config
    categories = ['news']
    paging = True
    """If go through the pages and there are actually no new results for another
    page, then bing returns the results from the last page again."""

    time_range_support = True
    time_map = {
        'day': 'interval="4"',
        'week': 'interval="7"',
        'month': 'interval="9"',
    }
    """A string '4' means *last hour*.  We use *last hour* for ``day`` here since the
    difference of *last day* and *last week* in the result list is just marginally.
    Bing does not have news range ``year`` / we use ``month`` instead."""

    base_url = 'https://www.bing.com/news/infinitescrollajax'
    """Bing (News) search URL"""

    def request(query, params):
        """Assemble a Bing-News request."""

        engine_region = traits.get_region(params['searxng_locale'], traits.all_locale)  # type: ignore
        engine_language = traits.get_language(params['searxng_locale'], 'en')  # type: ignore
        set_bing_cookies(params, engine_language, engine_region)

        # build URL query
        #
        # example: https://www.bing.com/news/infinitescrollajax?q=london&first=1

        page = int(params.get('pageno', 1)) - 1
        query_params = {
            'q': query,
            'InfiniteScroll': 1,
            # to simplify the page count lets use the default of 10 images per page
            'first': page * 10 + 1,
            'SFX': page,
            'form': 'PTFTNR',
            'setlang': engine_region.split('-')[0],
            'cc': engine_region.split('-')[-1],
        }

        if params['time_range']:
            query_params['qft'] = time_map.get(params['time_range'], 'interval="9"')

        params['url'] = base_url + '?' + urlencode(query_params)

        return params

    def response(resp):
        """Get response from Bing-Video"""
        results = []

        if not resp.ok or not resp.text:
            return results

        dom = html.fromstring(resp.text)

        for newsitem in eval_xpath_list(dom, '//div[contains(@class, "newsitem")]'):

            link = eval_xpath_getindex(newsitem, './/a[@class="title"]', 0, None)
            if link is None:
                continue
            url = link.attrib.get('href')
            title = extract_text(link)
            content = extract_text(eval_xpath(newsitem, './/div[@class="snippet"]'))

            metadata = []
            source = eval_xpath_getindex(newsitem, './/div[contains(@class, "source")]', 0, None)
            if source is not None:
                for item in (
                    eval_xpath_getindex(source, './/span[@aria-label]/@aria-label', 0, None),
                    # eval_xpath_getindex(source, './/a', 0, None),
                    # eval_xpath_getindex(source, './div/span', 3, None),
                    link.attrib.get('data-author'),
                ):
                    if item is not None:
                        t = extract_text(item)
                        if t and t.strip():
                            metadata.append(t.strip())
            metadata = ' | '.join(metadata)

            thumbnail = None
            imagelink = eval_xpath_getindex(newsitem, './/a[@class="imagelink"]//img', 0, None)
            if imagelink is not None:
                thumbnail = imagelink.attrib.get('src')
                if not thumbnail.startswith("https://www.bing.com"):
                    thumbnail = 'https://www.bing.com/' + thumbnail

            results.append(
                {
                    'url': url,
                    'title': title,
                    'content': content,
                    'thumbnail': thumbnail,
                    'metadata': metadata,
                }
            )

        return results

    def fetch_traits(engine_traits: EngineTraits):
        """Fetch languages and regions from Bing-News."""
        # pylint: disable=import-outside-toplevel

        from searx.engines.bing import fetch_traits as _f

        _f(engine_traits)

        # fix market codes not known by bing news:

        # In bing the market code 'zh-cn' exists, but there is no 'news' category in
        # bing for this market.  Alternatively we use the the market code from Honk
        # Kong.  Even if this is not correct, it is better than having no hits at
        # all, or sending false queries to bing that could raise the suspicion of a
        # bot.

        # HINT: 'en-hk' is the region code it does not indicate the language en!!
        engine_traits.regions['zh-CN'] = 'en-hk'