import os
import re
import csv
import urllib.parse as urlparse
from urllib.parse import parse_qs

import requests
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.support.ui import WebDriverWait


class BaseTester:
    BASE_URL = "https://crm-dev.caat.org.uk/"
    USERNAME = "roxie"
    PASSWORD = ""

    def __init__(self):
        firefox_options = webdriver.FirefoxOptions()
        firefox_options.headless = True
        self.browser = webdriver.Firefox(options=firefox_options)
        self.wait = WebDriverWait(self.browser, 20)

    def login(self):
        """ Login to civicrm so we can continue with the proper cookies """
        self.browser.get(self.BASE_URL)
        username = self.browser.find_element_by_id("edit-name")
        password = self.browser.find_element_by_id("edit-pass")
        submit = self.browser.find_element_by_id("edit-submit")
        username.send_keys(self.USERNAME)
        password.send_keys(self.PASSWORD)
        submit.click()

        # Wait for the js elements load so we know the cookies are good.
        # Waits for "Recent Items" part of sidebar which is unique when logged in
        self.wait.until(
            EC.visibility_of_element_located((By.ID, "block-civicrm-2"))
        )

    def logout(self):
        self.browser.get(self.BASE_URL + "/user/logout")
        # Wait for the next page to load to finish logging out
        self.wait.until(
            EC.visibility_of_element_located((By.ID, "tabs-wrapper"))
        )

    def find_element_by_id(self, *args, **kwargs):
        return self.browser.find_element_by_id(*args, **kwargs)

    def find_element_by_css_selector(self, *args, **kwargs):
        return self.browser.find_element_by_css_selector(*args, **kwargs)

    def wait_until_visible(self, locator):
        return self.wait.until(EC.visibility_of_element_located(locator))


class ContactExport(BaseTester):
    def __init__(self):
        super().__init__()
        self.search_url = self.BASE_URL + "/civicrm/contact/search"

        self.contact_selectall_id = "CIVICRM_QFID_ts_all_4"
        self.contact_dropdown_id = "select2-chosen-4"
        self.contact_exportoption_id = "select2-result-label-15"

    def download_csv(self):
        session_cookie = {}
        for cookie in self.browser.get_cookies():
            if re.findall(r"^SSESS.*", cookie.get("name")):
                session_cookie = cookie
        if not session_cookie:
            print("NO SESSION COOKIE FOUND. Are you logged in?")
            raise RuntimeError("No session cookie found.")

        session = requests.Session()
        session.cookies.update(
            {session_cookie["name"]: session_cookie["value"]}
        )
        qf_key = self.get_export_id()
        data = {
            "qfKey": qf_key,
            "entryURL": self.BASE_URL + "/civicrm/contact/search",
            "_qf_Select_next": "Continue",
            "exportOption": 1,
            "mergeOption": 0,
            "postal_greeting": 1,
            "addressee": 1,
        }
        req = session.request(
            "POST", self.BASE_URL + "/civicrm/contact/search", data=data
        )
        return req

    def calculate_exported_contacts_number(self):
        req = self.download_csv()
        file_name = "/tmp/exportedRecords.csv"
        with open(file_name, "w") as csv_file:
            csv_file.write(req.text)
        with open(file_name, "r") as csv_file:
            # Dict reader should remove headers
            exported_csv = csv.DictReader(csv_file)
            exported_number_exports = sum(1 for row in exported_csv)
        os.remove(file_name)
        return exported_number_exports

    def get_export_id(self) -> str:
        export_page_url = self.browser.current_url
        parsed = urlparse.urlparse(export_page_url)
        return parse_qs(parsed.query)['qfKey']

    def test(self, search_term: str):
        try:
            self.login()
            self.browser.get(self.search_url)
            search_box = self.find_element_by_id("sort_name")
            search_box.send_keys(search_term)
            search_box.send_keys(Keys.ENTER)
            self.wait_until_visible(
                (By.ID, "alpha-filter")
            ) #wait for table to load

            results_text = self.find_element_by_css_selector(
                ".form-layout-compressed > tbody:nth-child(1) > tr:nth-child(2) > td:nth-child(2) > label:nth-child(2)"
            ).text
            matches = re.findall(
                r"(\d+)", results_text
            ) # Should just be one match in normal cases
            result_no = int(matches[0])

            self.find_element_by_id(self.contact_selectall_id).click()
            self.find_element_by_id(self.contact_dropdown_id).click()
            self.find_element_by_id(self.contact_exportoption_id).click()
            self.wait_until_visible((By.CSS_SELECTOR, ".crm-block"))

            req = self.download_csv()
            exported_number_exports = self.calculate_exported_contacts_number()
            if exported_number_exports == (result_no):
                print(
                    "TEST PASSED: Number of expected contact exports for '{}' matches actual number of exports - Expected: {}, Actual: {}"
                    .format(search_term, result_no, exported_number_exports)
                )
            else:
                print(
                    "TEST FAILED: Number of expected contact exports for '{}' WAS NOT EQUAL to actual number of exports - Expected: {}, Actual: {}"
                    .format(search_term, result_no, exported_number_exports)
                )
        finally:
            self.logout()
            self.browser.close()


if __name__ == "__main__":
    ContactExport().test("John")