import datetime
import time
from pathlib import Path

import click
from selenium import webdriver
from selenium.common.exceptions import NoSuchElementException
from selenium.webdriver import Keys
from selenium.webdriver.common.by import By
from selenium.webdriver.support.select import Select

from ofx_processor.utils.config import (
    get_config,
    get_config_file_name,
    handle_config_file_error,
)


class LclDownloader:
    def __init__(self, download_folder: Path = None):
        self.config = get_config("lcl")
        if not self.config.bank_identifier or not self.config.bank_password:
            handle_config_file_error(
                get_config_file_name(), "Missing credentials in config file"
            )

        if not download_folder:
            download_folder = Path.home() / "Downloads"
        self.download_folder = download_folder.resolve()
        options = webdriver.FirefoxOptions()
        # options.add_argument("-headless")
        options.set_preference("browser.download.dir", str(self.download_folder))
        options.set_preference(
            "browser.helperApps.neverAsk.saveToDisk", "application/x-ofx"
        )
        self.selenium = webdriver.Firefox(options=options)
        self.selenium.implicitly_wait(30)
        self.selenium.set_window_size(1280, 4000)

    def download(self) -> str:
        try:
            return self._download()
        except Exception:
            screenshot = Path(self.config.screenshot_dir) / "error_download_lcl.png"
            self.selenium.save_screenshot(screenshot)
            raise

    def _download(self) -> str:
        selenium = self.selenium

        click.secho("Logging in to LCL...", fg="blue")
        selenium.get("https://monespace.lcl.fr/connexion")
        try:
            self._click(By.ID, "popin_tc_privacy_button_2")
            click.secho("Accepting privacy policy...", fg="blue")
        except NoSuchElementException:
            click.secho("Privacy policy already accepted", fg="blue")

        login_input = selenium.find_element(By.ID, "identifier")
        login_input.send_keys(self.config.bank_identifier)
        self._click(By.CLASS_NAME, "app-cta-button")
        for char in self.config.bank_password:
            self._click(By.CSS_SELECTOR, f".pad-button[value='{char}']")
        self._click(By.CLASS_NAME, "app-cta-button")
        click.secho("Logged in!", fg="green")

        retry = False
        while retry:
            try:
                self._click(By.CSS_SELECTOR, ".app-cta-button--primary")
                click.secho("Dismissing welcome screen...", fg="blue")
                time.sleep(1)
            except NoSuchElementException:
                click.secho("No welcome screen found.", fg="blue")
                retry = False

        self._click(By.CLASS_NAME, "extended-zone")
        self._click(By.ID, "export-button")

        end = datetime.date.today() - datetime.timedelta(days=1)
        start = end - datetime.timedelta(days=30)

        self._type_date(By.ID, "mat-input-0", start)
        self._type_date(By.ID, "mat-input-1", end)

        self._click(By.CSS_SELECTOR, "ui-desktop-select button")
        self._click_nth(By.CSS_SELECTOR, "ui-select-list ul li", 2)

        self._click(By.CLASS_NAME, "download-button")
        click.secho("Found it!", fg="green")
        time.sleep(5)
        selenium.get("about:downloads")
        return self._get_last_download_file_name()

    def _click(self, by: By, value: str):
        self.selenium.find_element(by, value).click()

    def _click_nth(self, by: By, value: str, idx: int):
        self.selenium.find_elements(by, value)[idx].click()

    def _select(self, by: By, value: str, index: int):
        Select(self.selenium.find_element(by, value)).select_by_index(index)

    def _type(self, by: By, value: str, value_to_type: str):
        self.selenium.find_element(by, value).send_keys(value_to_type)

    def _clear(self, by: By, value: str):
        self.selenium.find_element(by, value).clear()

    def _type_date(self, by: By, value: str, _date: datetime.date):
        # The new version of the form doesn't behave nicely when typing the date.
        self._type(by, value, "1")
        self._type(by, value, Keys.ARROW_LEFT*5)
        self._type(by, value, Keys.BACKSPACE*5)
        self._type(by, value, _date.strftime("%d/%m"))
        self._type(by, value, Keys.ARROW_RIGHT*5)
        self._type(by, value, Keys.BACKSPACE*4)
        self._type(by, value, _date.strftime("%Y"))

    def _get_last_download_file_name(self, wait_seconds: int = 30):
        end_time = time.time() + wait_seconds
        while time.time() < end_time:
            try:
                file_name = self.selenium.execute_script(
                    "return document.querySelector('#contentAreaDownloadsView .downloadMainArea .downloadContainer description:nth-of-type(1)').value"
                )
                if file_name:
                    return self.download_folder / file_name
            except:
                pass
            time.sleep(1)


if __name__ == "__main__":
    filename = LclDownloader().download()
    print(filename)