# Copyright The IETF Trust 2014-2021, All Rights Reserved
# -*- coding: utf-8 -*-

from django.urls import reverse as urlreverse
from unittest import skipIf

skip_selenium = False
skip_message  = ""
try:
    from selenium import webdriver
except ImportError as e:
    skip_selenium = True
    skip_message = "Skipping selenium tests: %s" % e


from ietf.utils.pipe import pipe
from ietf.utils.test_runner import IetfLiveServerTestCase
from ietf import settings


executable_name = 'chromedriver'
code, out, err = pipe('{} --version'.format(executable_name))
if code != 0:
    skip_selenium = True
    skip_message = "Skipping selenium tests: '{}' executable not found.".format(executable_name)
if skip_selenium:
    print("     "+skip_message)

def start_web_driver():
    options = webdriver.ChromeOptions()
    options.add_argument("headless")
    options.add_argument("disable-extensions")
    options.add_argument("disable-gpu") # headless needs this
    options.add_argument("no-sandbox") # docker needs this
    return webdriver.Chrome(options=options, service_log_path=settings.TEST_GHOSTDRIVER_LOG_PATH)


def selenium_enabled():
    """Are Selenium tests enabled?"""
    return not skip_selenium


def ifSeleniumEnabled(func):
    """Only run test if Selenium testing is enabled"""
    return skipIf(skip_selenium, skip_message)(func)


class IetfSeleniumTestCase(IetfLiveServerTestCase):
    login_view = 'ietf.ietfauth.views.login'

    def setUp(self):
        super(IetfSeleniumTestCase, self).setUp()
        self.driver = start_web_driver()
        self.driver.set_window_size(1024,768)
    
    def tearDown(self):
        super(IetfSeleniumTestCase, self).tearDown()
        self.driver.close()
    
    def absreverse(self,*args,**kwargs):
        return '%s%s'%(self.live_server_url, urlreverse(*args, **kwargs))
    
    def debug_snapshot(self,filename='debug_this.png'):
        self.driver.execute_script("document.body.bgColor = 'white';")
        self.driver.save_screenshot(filename)

    def login(self, username='plain'):
        url = self.absreverse(self.login_view)
        password = '%s+password' % username
        self.driver.get(url)
        self.driver.find_element_by_name('username').send_keys(username)
        self.driver.find_element_by_name('password').send_keys(password)
        self.driver.find_element_by_xpath('//button[@type="submit"]').click()