import random
import requests
import mechanicalsoup
from time import sleep
from django.conf import settings

pages_start = [i*10 for i in range(10)]

PARAMETER = '?sort_by=date_desc&start='

BROWSER = getattr(settings, 'BROWSER_URI')


headers = {
    'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:50.0) Gecko/20100101 Firefox/50.0',
    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
    'Accept-Language': 'en-US,en;q=0.5',
    'Accept-Encoding': 'gzip, deflate, br',
    'Upgrade-Insecure-Requests': '1',
    'Connection': 'keep-alive'
}


def scrape_reviews(location_url, n_pages):
    start_params = pages_start[:n_pages]
    yelp_reviews = []

    for start in start_params:
        url = location_url + PARAMETER + str(start)
        browser = mechanicalsoup.StatefulBrowser()
        browser.open(url)

        # pause for 60-120 to make request more human-like.
        sleep(random.randint(30, 60))
        html_soup = browser.page

        review_items = html_soup.findAll('li', class_='margin-b5__373c0__2ErL8')

        # A single review content
        if not review_items:
            return None
        for review in review_items:
            user_detail_div = review.find('div', class_='user-passport-info')
            if not user_detail_div:
                continue
            name = user_detail_div.a.getText()
            profile_link = user_detail_div.a.attrs.get('href')
            rating_div = review.find('div', class_='i-stars__373c0__1T6rz')
            rating = int(rating_div.attrs.get('aria-label').split()[0])
            date_posted = review.find('span', class_='css-e81eai').getText()
            comment_p = review.find('p', class_='comment__373c0__1M-px css-n6i4z7')
            review_text = comment_p.span.getText()
            review_dict = {
                'name': name,
                'profile': profile_link,
                'rating': rating,
                'date_posted': date_posted,
                'comment': review_text,
            }
            yelp_reviews.append(review_dict)
    return yelp_reviews


def scrape_reviews_using_browser(location_url):
    url = BROWSER + f'/yelp/reviews?url={location_url}'
    response = requests.get(url).json()
    return response.get('reviews')