# -*- coding: utf-8 -*-
import json
import logging
import os.path
import subprocess
import time
from http.cookiejar import LWPCookieJar
from urllib.parse import urlparse

from selenium import webdriver
from selenium.webdriver.common.action_chains import ActionChains
from selenium.webdriver.common.by import By

import browser_cookie3
import click

from miners.logging import configure_logging

logger = logging.getLogger(__name__)


LOGIN_URL = "https://login.aliexpress.com/?flag=1&return_url=http%3A%2F%2Fhome.aliexpress.com%2Fdropshippercenter%2Fproduct_find.htm"

VISIT_URLS = {
    "hot-selling": None,
    "rev-img-search": "https://home.aliexpress.com/dropshippercenter/product_find.htm#/search",
}


def login_aliexpress(driver, username, password, url=None):
    """ login to aliexpress with <username>, <password> on <driver>
        visit <url> if passed
    """
    driver.get(LOGIN_URL)
    time.sleep(3)

    driver.set_window_size(1248, 692)
    time.sleep(1)

    element = driver.find_element(By.CSS_SELECTOR, ".fm-button")
    actions = ActionChains(driver)
    actions.move_to_element(element).perform()
    time.sleep(1)

    driver.find_element(By.CSS_SELECTOR, ".fm-button").click()
    time.sleep(2)

    driver.find_element(By.ID, "fm-login-id").click()
    time.sleep(1)

    driver.find_element(By.ID, "fm-login-id").send_keys(username)
    time.sleep(1)

    driver.find_element(By.ID, "fm-login-password").send_keys(password)
    time.sleep(1)

    driver.find_element(By.CSS_SELECTOR, ".fm-button").click()
    time.sleep(7)

    if url:
        driver.get(url)


def get_cookies_path(driver):
    """ get the path to the cookies sqlite database """
    driver.get("about:support")
    profile_dir = driver.find_element_by_id("profile-dir-box").text
    return os.path.join(profile_dir, "cookies.sqlite")


def extract_cookies(domain, output_filename, cookie_file=None):
    """ extract cookies for <domain> from Firefox, return a cookie jar

        output_filename: cookie jar output filename

        cookie_file: path to the cookies sqlite database, if omitted,
        default to desktop browser cookie file
    """
    allowed_domains = {domain, '.' + domain.split('.', 1)[1]}

    jar = LWPCookieJar(output_filename)
    cookies = browser_cookie3.firefox(cookie_file=cookie_file)

    # domain_name argument does not work in browser_cookie3.firefox
    # has to do the filtering manually
    for c in cookies:
        if c.domain in allowed_domains:
            jar.set_cookie(c)

    return jar


def extract_save_cookies(domain, output_filename, cookie_file=None):
    """ extract and save cookies for <domain> to <output_filename>
        attempt multiple times before giving up

        cookie_file: path to the cookies sqlite database, if omitted,
        default to desktop browser cookie file

        raises:
            KeyError -- if missing httpOnly cookies
    """
    attempts = 0

    while attempts < 30:
        attempts += 1
        logger.debug(f"extracting cookies from {cookie_file}")

        cookie_jar = extract_cookies(domain, output_filename, cookie_file)
        cookie_jar.save(ignore_discard=True, ignore_expires=True)

        if "JSESSIONID" in {c.name for c in cookie_jar}:
            break

        time.sleep(3)
    else:
        raise KeyError(f"missing httpOnly cookies for {domain}")

    logger.debug(f"saved to {output_filename}")


def borrow_cookies(url, account, output_filename, desktop):
    """ borrow cookies on <url> and output to <output_filename>

        account: user account credentials
        desktop: if True, you need to input usernames and passwords yourself
                 if False, selenium will do that for you
    """
    domain = urlparse(url).netloc

    if desktop:
        # open a tab on desktop firefox
        subprocess.Popen(["firefox", "-new-tab", url], stdout=subprocess.PIPE)
        time.sleep(40)

        extract_save_cookies(domain, output_filename)

    else:
        # open selenium firefox
        with webdriver.Firefox() as driver:
            cookie_file = get_cookies_path(driver)
            login_aliexpress(driver, url=url, **account)    # auto-login

            extract_save_cookies(domain, output_filename, cookie_file)
            time.sleep(5)


@click.command()
@click.option('-a', '--acc-filename', default="aliexpress-acc.json", type=click.File('r'), help="use login credentials from this file, default: aliexpress-acc.json")
@click.option('-o', '--output-filename', default="cookies.txt", help="output filename to use, default: cookies.txt")
@click.option('-t', '--target', default="rev-img-search", help="which URL to visit after login? (keys and URLs are defined in the script)")
@click.option('--desktop/--no-desktop', default=False, help="use a real desktop browser to get the cookies? DEFAULT: no-desktop")
def main(acc_filename, output_filename, target, desktop):
    """ Borrow session cookies at AliExpress from Firefox browser, save them to a cookie file.
    """
    configure_logging(logger, "logs/borrow_cookies.log")

    acc = json.load(acc_filename)
    url = VISIT_URLS[target]

    if url:
        logger.info(f"borrowing cookies at {url}")

    if not acc:
        logger.error("missing user account credentials.")
        return

    try:
        borrow_cookies(url, acc, output_filename, desktop)
    except Exception as e:
        logger.exception(e)
        raise

    logger.info("done.")


if __name__ == "__main__":
    main()