from django.contrib.staticfiles.testing import StaticLiveServerTestCase
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.common.exceptions import WebDriverException
import time, os

MAX_WAIT = 10

class NewVisitorTest(StaticLiveServerTestCase):

    def setUp(self):
        #self.browser = webdriver.Firefox()
        self.browser = webdriver.Chrome()
        staging_server = os.environ.get('STAGING_SERVER')  
        if staging_server:
            self.live_server_url = 'http://' + staging_server

    def tearDown(self):
        self.browser.quit()

    def wait_for_row_in_list_table(self, row_text):
        start_time = time.time()
        while True:
            try:
                table = self.browser.find_element_by_id('id_list_table')
                rows = table.find_elements_by_tag_name('tr')
                self.assertIn(row_text, [row.text for row in rows])
                return
            except (AssertionError, WebDriverException) as e:
                if (time.time() - start_time) > MAX_WAIT:
                    raise e
                time.sleep(0.1)

    def test_can_start_a_list_for_one_user(self):
        self.browser.get(self.live_server_url)
        self.assertIn('To-Do', self.browser.title)
        header_text = self.browser.find_element_by_tag_name('h1').text
        self.assertIn('To-Do', header_text)
        inputbox = self.browser.find_element_by_id('id_new_item')
        self.assertEqual(
            inputbox.get_attribute('placeholder'),
            'Enter a to-do item'
        )
        # ITEM 1
        inputbox.send_keys('Buy rubber ducks')
        inputbox.send_keys(Keys.ENTER)
        self.wait_for_row_in_list_table('1: Buy rubber ducks')
        # ITEM 2
        inputbox = self.browser.find_element_by_id('id_new_item')
        inputbox.send_keys('Buy squirrel suits')
        inputbox.send_keys(Keys.ENTER)
        self.wait_for_row_in_list_table('1: Buy rubber ducks')
        self.wait_for_row_in_list_table('2: Buy squirrel suits')
        # Done?
        #self.fail('Finish the test!')

    def test_multi_users_can_start_list_diff_urls(self):
        self.browser.get(self.live_server_url)
        ib = self.browser.find_element_by_id('id_new_item')
        ib.send_keys('Buy super bugz outfit')
        ib.send_keys(Keys.ENTER)
        self.wait_for_row_in_list_table('1: Buy super bugz outfit')
        list_url = self.browser.current_url
        self.assertRegex(list_url, '/lists/.+')
        # NEW USER
        self.browser.quit()
        self.browser = webdriver.Chrome()
        self.browser.get(self.live_server_url)
        page_text = self.browser.find_element_by_tag_name('body').text
        self.assertNotIn('Buy super bugz outfit', page_text)
        self.assertNotIn('make a fly', page_text)
        inputbox = self.browser.find_element_by_id('id_new_item')
        inputbox.send_keys('Buy milk')
        inputbox.send_keys(Keys.ENTER)
        self.wait_for_row_in_list_table('1: Buy milk')
        francis_list_url = self.browser.current_url
        self.assertRegex(francis_list_url, '/lists/.+')
        self.assertNotEqual(francis_list_url, list_url)
        page_text = self.browser.find_element_by_tag_name('body').text
        self.assertNotIn('Buy peacock feathers', page_text)
        self.assertIn('Buy milk', page_text)

    def test_layout_and_styling(self):
        self.browser.get(self.live_server_url)
        self.browser.set_window_size(1024, 768)
        inputbox = self.browser.find_element_by_id('id_new_item')
        self.assertAlmostEqual(
            inputbox.location['x'] + inputbox.size['width'] / 2,
            512,
            delta=10
        )
        inputbox.send_keys('testing')
        inputbox.send_keys(Keys.ENTER)
        self.wait_for_row_in_list_table('1: testing')
        inputbox = self.browser.find_element_by_id('id_new_item')
        self.assertAlmostEqual(
            inputbox.location['x'] + inputbox.size['width'] / 2,
            512,
            delta=10
        )