import logging
import os
import time

from . import browser
from . import log
from . import dal
from . import pages

settings = {}

def init(settings_obj):
    global settings
    settings = settings_obj

    browser.init(settings_obj)
    dal.init(settings_obj)
    pages.init(settings_obj)
    log.init(settings_obj)

class Model:
    def __init__(self):
        self._webdriver = None

    @property
    def webdriver(self):
        if not self._webdriver:
            self._webdriver = browser.create_webdriver(settings.WEBDRIVER_BROWSER)
            page_api = pages.LandingPage(self.webdriver)
            page_api.goto_landing_page()
        return self._webdriver

    def do_random_page(self):
        # Landing page (select language)
        page_api = pages.LandingPage(self.webdriver)
        page_api.goto_landing_page()
        page_api.select_language(settings.PAGE_LANGUAGE)

        # Main page
        page_api = pages.MainPage(self.webdriver)
        page_api.goto_random_article()

        # Article page
        pages_visited = []
        while True:
            page_api = pages.ArticlePage(self.webdriver)

            title = page_api.get_title()
            logging.debug('visited page: %s' % title)
            if title in pages_visited:
                logging.info('encountered loop at page = %s' % title)
                break
            if title == 'Philosophy':
                logging.info('made it to philosophy in %s pages' % len(pages_visited))
                pages_visited.append(title)
                break
            pages_visited.append(title)

            rc = page_api.click_first_link()
            if not rc:
                logging.warn('failure: unable to continue (perhaps no valid links?)')
                break
            print()