"""Selenium smoke tests — need a running app (see README)."""

from __future__ import annotations

import os
import urllib.error
import urllib.request

import pytest
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as ec
from selenium.webdriver.support.ui import WebDriverWait

pytest.importorskip("selenium.webdriver")


def _server_reachable(base_url: str, timeout: float = 2.0) -> bool:
    try:
        urllib.request.urlopen(f"{base_url.rstrip('/')}/", timeout=timeout)
        return True
    except (urllib.error.URLError, OSError):
        return False


@pytest.fixture
def driver():
    from selenium import webdriver
    from selenium.webdriver.chrome.options import Options

    opts = Options()
    opts.add_argument("--headless=new")
    opts.add_argument("--no-sandbox")
    opts.add_argument("--disable-dev-shm-usage")
    try:
        browser = webdriver.Chrome(options=opts)
    except Exception as exc:  # pragma: no cover
        pytest.skip(f"Chrome / ChromeDriver not available: {exc}")
    yield browser
    browser.quit()


@pytest.mark.selenium
def test_home_page_title(driver):
    base = os.environ.get("SELENIUM_BASE_URL", "http://127.0.0.1:8080").rstrip("/")
    if not _server_reachable(base):
        pytest.skip(
            f"No server at {base}. In another terminal run: "
            "pipenv run dev   (then re-run this test, or set SELENIUM_BASE_URL)."
        )
    driver.get(f"{base}/")
    assert "Python Editor" in driver.title


@pytest.mark.selenium
def test_editor_page_loads_core_controls(driver):
    base = os.environ.get("SELENIUM_BASE_URL", "http://127.0.0.1:8080").rstrip("/")
    if not _server_reachable(base):
        pytest.skip(
            f"No server at {base}. In another terminal run: "
            "pipenv run dev   (then re-run this test, or set SELENIUM_BASE_URL)."
        )

    driver.get(f"{base}/editor")

    # If the app is configured with AUTH_ENABLED=true, unauthenticated requests redirect to /login.
    if "/login" in (driver.current_url or ""):
        pytest.skip("Editor requires login; set AUTH_ENABLED=false for this Selenium smoke test.")

    wait = WebDriverWait(driver, 10)
    wait.until(ec.presence_of_element_located((By.ID, "run-btn")))
    wait.until(ec.presence_of_element_located((By.ID, "stop-btn")))
    wait.until(ec.presence_of_element_located((By.ID, "file-tree")))