"""
Chrome browser automation via Selenium.
Selenium 4+ handles ChromeDriver automatically — no manual install needed.
"""
from selenium import webdriver
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
import urllib.parse

_driver = None

def _get_driver(headless: bool = False) -> webdriver.Chrome:
    global _driver
    if _driver is None:
        options = Options()
        if headless:
            options.add_argument("--headless=new")
        options.add_argument("--no-sandbox")
        options.add_argument("--disable-dev-shm-usage")
        _driver = webdriver.Chrome(options=options)
    return _driver

def navigate_to(url: str):
    """Navigate Chrome to a URL."""
    driver = _get_driver()
    driver.get(url)
    return driver.title

def search_web(query: str):
    """Perform a Google search in Chrome."""
    encoded = urllib.parse.quote_plus(query)
    return navigate_to(f"https://www.google.com/search?q={encoded}")

def get_page_title() -> str:
    driver = _get_driver()
    return driver.title

def get_page_url() -> str:
    driver = _get_driver()
    return driver.current_url

def close_browser():
    global _driver
    if _driver:
        _driver.quit()
        _driver = None