## Bing (News)
#
# @website     https://www.bing.com/news
# @provide-api yes (http://datamarket.azure.com/dataset/bing/search),
#              max. 5000 query/month
#
# @using-api   no (because of query limit)
# @results     HTML (using search portal)
# @stable      no (HTML can change)
# @parse       url, title, content, publishedDate

from urllib import urlencode
from cgi import escape
from lxml import html
from datetime import datetime, timedelta
from dateutil import parser
import re
from searx.engines.xpath import extract_text

# engine dependent config
categories = ['news']
paging = True
language_support = True

# search-url
base_url = 'https://www.bing.com/'
search_string = 'news/search?{query}&first={offset}'


# do search-request
def request(query, params):
    offset = (params['pageno'] - 1) * 10 + 1

    if params['language'] == 'all':
        language = 'en-US'
    else:
        language = params['language'].replace('_', '-')

    search_path = search_string.format(
        query=urlencode({'q': query, 'setmkt': language}),
        offset=offset)

    params['cookies']['_FP'] = "ui=en-US"

    params['url'] = base_url + search_path

    return params


# get response from search-request
def response(resp):
    results = []

    dom = html.fromstring(resp.content)

    # parse results
    for result in dom.xpath('//div[@class="sn_r"]'):
        link = result.xpath('.//div[@class="newstitle"]/a')[0]
        url = link.attrib.get('href')
        title = extract_text(link)
        contentXPath = result.xpath('.//div[@class="sn_txt"]/div//span[@class="sn_snip"]')
        content = escape(extract_text(contentXPath))

        # parse publishedDate
        publishedDateXPath = result.xpath('.//div[@class="sn_txt"]/div'
                                          '//span[contains(@class,"sn_ST")]'
                                          '//span[contains(@class,"sn_tm")]')

        publishedDate = escape(extract_text(publishedDateXPath))

        if re.match("^[0-9]+ minute(s|) ago$", publishedDate):
            timeNumbers = re.findall(r'\d+', publishedDate)
            publishedDate = datetime.now() - timedelta(minutes=int(timeNumbers[0]))
        elif re.match("^[0-9]+ hour(s|) ago$", publishedDate):
            timeNumbers = re.findall(r'\d+', publishedDate)
            publishedDate = datetime.now() - timedelta(hours=int(timeNumbers[0]))
        elif re.match("^[0-9]+ hour(s|), [0-9]+ minute(s|) ago$", publishedDate):
            timeNumbers = re.findall(r'\d+', publishedDate)
            publishedDate = datetime.now()\
                - timedelta(hours=int(timeNumbers[0]))\
                - timedelta(minutes=int(timeNumbers[1]))
        elif re.match("^[0-9]+ day(s|) ago$", publishedDate):
            timeNumbers = re.findall(r'\d+', publishedDate)
            publishedDate = datetime.now() - timedelta(days=int(timeNumbers[0]))
        else:
            try:
                publishedDate = parser.parse(publishedDate, dayfirst=False)
            except TypeError:
                publishedDate = datetime.now()

        # append result
        results.append({'url': url,
                        'title': title,
                        'publishedDate': publishedDate,
                        'content': content})

    # return results
    return results
