import os
import time
import json
import logging

from selenium import webdriver
from selenium.webdriver.chrome.options import Options
from selenium.webdriver.chrome.service import Service
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

from config import TempConfig  # Deine Konfigurationsklasse mit Pfaden und URLs

# Logging konfigurieren
template = '%(asctime)s - %(levelname)s - %(name)s - %(message)s'
logging.basicConfig(level=logging.INFO, format=template)
logger = logging.getLogger(__name__)


class DealfrontScraper:
    def __init__(self):
        logger.info("Initialisiere den DealfrontScraper...")
        # Chrome-Optionen
        chrome_options = Options()
        prefs = {"profile.managed_default_content_settings.images": 2}
        chrome_options.add_experimental_option("prefs", prefs)
        chrome_options.add_argument("--headless")
        chrome_options.add_argument("--no-sandbox")
        chrome_options.add_argument("--disable-dev-shm-usage")
        chrome_options.add_argument("--window-size=1920,1080")

        # WebDriver-Service
        service = Service(executable_path=TempConfig.CHROMEDRIVER_PATH)
        try:
            self.driver = webdriver.Chrome(service=service, options=chrome_options)
        except Exception:
            logger.critical("WebDriver konnte nicht initialisiert werden.", exc_info=True)
            raise

        # Explicit Wait
        self.wait = WebDriverWait(self.driver, TempConfig.DEFAULT_TIMEOUT)
        # Credentials laden
        self.username, self.password = self._load_credentials()
        logger.info("WebDriver erfolgreich initialisiert.")

    def _load_credentials(self):
        try:
            with open(TempConfig.DEALFRONT_CREDENTIALS_FILE, 'r', encoding='utf-8') as f:
                creds = json.load(f)
            return creds['username'], creds['password']
        except Exception as e:
            logger.error(f"Credentials-Datei konnte nicht geladen werden: {e}")
            raise

    def login_and_find_list(self, search_name):
        # Login-Flow
        logger.info(f"Navigiere zur Login-Seite: {TempConfig.DEALFRONT_LOGIN_URL}")
        self.driver.get(TempConfig.DEALFRONT_LOGIN_URL)
        self.wait.until(EC.visibility_of_element_located((By.NAME, 'email'))).send_keys(self.username)
        self.driver.find_element(By.NAME, 'password').send_keys(self.password)
        self.driver.find_element(By.XPATH, "//button[normalize-space()='Log in']").click()
        logger.info("Login gesendet.")

        # Klicken auf 'Prospects finden'
        tile = self.wait.until(
            EC.element_to_be_clickable((By.CSS_SELECTOR, "a[data-test-target-product-tile='Prospects finden']"))
        )
        tile.click()
        logger.info("'Prospects finden' geklickt.")

        # Vordefinierte Suche auswählen
        selector = (By.XPATH, f"//div[contains(@class,'truncate') and normalize-space()='{search_name}']")
        item = self.wait.until(EC.element_to_be_clickable(selector))
        item.click()
        logger.info(f"Suche '{search_name}' geladen.")

    def extract_current_page_results(self):
        # Kurz Implicit-Wait
        self.driver.implicitly_wait(1)

        # Warten auf erstes Daten-Element
        first = (By.CSS_SELECTOR, ".sticky-column a.t-highlight-text")
        self.wait.until(EC.visibility_of_element_located(first))

        logger.info("Extrahiere aktuelle Seite...")
        results = []

        # Warten auf mindestens eine Tabellen-Zeile
        rows_sel = (By.CSS_SELECTOR, "table#t-result-table tbody tr[id]")
        self.wait.until(EC.presence_of_all_elements_located(rows_sel))
        rows = self.driver.find_elements(*rows_sel)
        logger.info(f"{len(rows)} Zeilen gefunden.")

        # Extraktion Namen & Website
        for i, row in enumerate(rows, 1):
            # Name
            name_el = row.find_elements(By.CSS_SELECTOR, ".sticky-column a.t-highlight-text")
            if not name_el:
                logger.warning(f"Zeile {i}: Kein Name gefunden. Überspringe.")
                continue
            elem = name_el[0]
            name = (elem.get_attribute('title') or elem.text).strip()

            # Website
            web_el = row.find_elements(By.CSS_SELECTOR, "td:nth-of-type(3) a")
            if web_el:
                web = web_el[0].text.strip()
            else:
                cell = row.find_elements(By.CSS_SELECTOR, "td:nth-of-type(3)")
                web = cell[0].text.strip() if cell else ''

            results.append({'name': name, 'website': web})

        logger.info(f"Extraktion abgeschlossen: {len(results)} Firmen.")
        # Implicit-Wait zurücksetzen
        self.driver.implicitly_wait(TempConfig.IMPLICIT_WAIT)
        return results

    def click_next_page(self) -> bool:
        buttons = self.driver.find_elements(By.CSS_SELECTOR, "nav.eb-pagination a.eb-pagination-button")
        if not buttons:
            return False
        nxt = buttons[-1]
        if not nxt.is_enabled() or 'disabled' in nxt.get_attribute('class'):
            return False
        current = self.driver.find_element(By.CSS_SELECTOR,
                                           "nav.eb-pagination a.eb-pagination-button.active").text
        nxt.click()
        self.wait.until(lambda d: d.find_element(By.CSS_SELECTOR,
                                                  "nav.eb-pagination a.eb-pagination-button.active").text != current)
        return True

    def run(self, search_name):
        try:
            self.login_and_find_list(search_name)
            all_data = []
            while True:
                page = self.extract_current_page_results()
                all_data.extend(page)
                if not self.click_next_page():
                    break
            return all_data
        finally:
            self.driver.quit()


if __name__ == '__main__':
    scraper = DealfrontScraper()
    data = scraper.run('Facility Management')
    for entry in data:
        print(entry)