#!/usr/bin/env python3
import os
import sys
import json
import time
import logging

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

# ───────────────────────────────────────────────────────────────────────────────
# Konstanten
LOGIN_URL           = "https://app.dealfront.com/login"
TARGET_SEARCH_NAME  = "Facility Management"
CREDENTIALS_FILE    = "dealfront_credentials.json"
OUTPUT_DIR          = "output"
CHROMEDRIVER_PATH   = "/usr/bin/chromedriver"
LOG_FORMAT          = "%(asctime)s - %(levelname)-8s - %(message)s"
# ───────────────────────────────────────────────────────────────────────────────

# Logging konfigurieren
logging.basicConfig(level=logging.INFO, format=LOG_FORMAT, force=True)
logger = logging.getLogger(__name__)
logging.getLogger("selenium").setLevel(logging.WARNING)

def load_credentials(path):
    if not os.path.isfile(path):
        logger.error(f"Credentials-Datei nicht gefunden: {path}")
        sys.exit(1)
    with open(path, encoding="utf-8") as f:
        creds = json.load(f)
    user = creds.get("username")
    pwd  = creds.get("password")
    if not user or not pwd:
        logger.error("Credentials-Datei enthält keinen username/password.")
        sys.exit(1)
    return user, pwd

class DealfrontScraper:
    def __init__(self, driver, wait, username, password):
        self.driver   = driver
        self.wait     = wait
        self.username = username
        self.password = password

    def login_and_find_list(self, search_name):
        # Login-Seite öffnen
        self.driver.get(LOGIN_URL)

        # E-Mail/Username und Passwort eintragen
        self.wait.until(EC.visibility_of_element_located(
            (By.CSS_SELECTOR, "input[type='email'], input[type='text']")
        ))
        self.driver.find_element(By.CSS_SELECTOR, "input[type='email'], input[type='text']")\
                   .send_keys(self.username)
        self.driver.find_element(By.CSS_SELECTOR, "input[type='password']")\
                   .send_keys(self.password)
        self.driver.find_element(By.CSS_SELECTOR, "button[type='submit']").click()

        # Quick-Link "Prospects finden" anklicken
        btn = self.wait.until(EC.element_to_be_clickable((
            By.XPATH, "//a[normalize-space()='Prospects finden']"
        )))
        btn.click()

        # Gewünschte Suche auswählen
        btn = self.wait.until(EC.element_to_be_clickable((
            By.XPATH, f"//a[normalize-space()='{search_name}']"
        )))
        btn.click()

        # Auf erste Datenzeile warten
        first = (By.CSS_SELECTOR, ".sticky-column a.t-highlight-text")
        self.wait.until(EC.visibility_of_element_located(first))
        time.sleep(1)

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

        # Mindestens eine Tabellenzeile im DOM
        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)

        results = []
        for row in rows:
            # Firmenname
            ne = row.find_elements(By.CSS_SELECTOR, ".sticky-column a.t-highlight-text")
            if not ne:
                continue
            name = (ne[0].get_attribute("title") or ne[0].text).strip()

            # Website aus 3. Spalte
            we = row.find_elements(By.CSS_SELECTOR, "td:nth-of-type(3) a")
            if we:
                site = we[0].text.strip()
            else:
                td3 = row.find_elements(By.CSS_SELECTOR, "td:nth-of-type(3)")
                site = td3[0].text.strip() if td3 else ""

            results.append({"name": name, "website": site})

        # Implicit-Wait zurücksetzen
        self.driver.implicitly_wait(10)
        return results

    def click_next_page(self):
        # Prev, Seiten, Next Buttons
        btns = self.driver.find_elements(By.CSS_SELECTOR, "nav.eb-pagination a.eb-pagination-button")
        if not btns:
            return False
        nxt = btns[-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):
        self.login_and_find_list(search_name)
        all_results = []
        while True:
            all_results.extend(self.extract_current_page_results())
            if not self.click_next_page():
                break
        return all_results

def main():
    username, password = load_credentials(CREDENTIALS_FILE)

    # Chrome WebDriver initialisieren
    opts = Options()
    opts.add_argument("--headless")
    opts.add_argument("--no-sandbox")
    opts.add_argument("--disable-dev-shm-usage")
    service = Service(CHROMEDRIVER_PATH)
    driver = webdriver.Chrome(service=service, options=opts)
    wait = WebDriverWait(driver, 30)

    scraper = DealfrontScraper(driver, wait, username, password)
    results = scraper.run(TARGET_SEARCH_NAME)

    # Ergebnisse speichern
    os.makedirs(OUTPUT_DIR, exist_ok=True)
    outfile = os.path.join(OUTPUT_DIR, "results.json")
    with open(outfile, "w", encoding="utf-8") as f:
        json.dump(results, f, ensure_ascii=False, indent=2)

    print(f"✅ Fertig: {len(results)} Einträge in {outfile}")
    driver.quit()

if __name__ == "__main__":
    main()