import asyncio
import os
import subprocess
import warnings
from datetime import date, timedelta
from importlib.resources import files
from pathlib import Path

import pytest

from room_cal._utils import data_home as _data_home
from room_cal.service_api.types import ServiceAuthError


def _ts_dir() -> Path:
  return Path(str(files('room_cal.service_api').joinpath('typescript')))


def _browsers_path() -> Path:
  return _data_home() / '.playwright-browsers'


def _npm_env() -> dict:
  env = os.environ.copy()
  env.setdefault('ROOM_CAL_DATA_HOME', str(_data_home()))
  env['PLAYWRIGHT_BROWSERS_PATH'] = str(_browsers_path())
  return env


def _npm_run(script: str, timeout: int, extra_env: dict | None = None) -> subprocess.CompletedProcess:
  ts_dir = _ts_dir()
  if not (ts_dir / 'node_modules').exists():
    subprocess.run(['npm', 'install'], cwd=ts_dir, check=True, capture_output=True)
  env = _npm_env()
  if extra_env:
    env.update(extra_env)
  try:
    return subprocess.run(
      ['npm', 'run', script],
      cwd=ts_dir,
      env=env,
      capture_output=True,
      text=True,
      timeout=timeout,
    )
  except subprocess.TimeoutExpired as exc:
    pytest.fail(f'npm run {script} timed out after {exc.timeout}s')
  except Exception as exc:
    pytest.fail(f'Failed to launch npm run {script}: {exc}')


@pytest.fixture(scope='session')
def chrome_installed():
  result = _npm_run('install-browsers', timeout=30)
  if result.returncode != 0:
    pytest.fail(
      f'npm run install-browsers failed (exit {result.returncode})\n'
      f'stdout:\n{result.stdout}\nstderr:\n{result.stderr}'
    )
  browsers = _browsers_path()
  chromium_dirs = [p for p in browsers.iterdir() if p.is_dir() and 'chromium' in p.name] if browsers.exists() else []
  if not chromium_dirs:
    pytest.fail(f'install-browsers exited 0 but no chromium dirs found in {browsers}')


def test_install_chrome(chrome_installed):
  """npm run install-browsers puts Chromium binaries in the expected location."""


def test_refresh_cookies_headless(chrome_installed):
  """Cookie-refresh machinery: Chromium must launch and write cookies.

  Pass         — cookies updated and API call succeeds.
  Pass + warn  — script ran correctly but session is stale (exit 2), cookies
                 unchanged, or API auth failed after writing cookies.
  Fail         — unexpected error or non-zero exit.
  """
  data = _data_home()
  airbnb_env = data / 'airbnb.env'
  booking_env = data / 'booking.env'

  before = {p: p.read_text() if p.exists() else None for p in (airbnb_env, booking_env)}

  result = _npm_run('refresh-all', timeout=60, extra_env={'HEADLESS': '1'})
  output = f'stdout:\n{result.stdout}\nstderr:\n{result.stderr}'

  if result.returncode == 2:
    warnings.warn(
      'Session is stale — run `refresh-creds` to re-authenticate.\n' + output,
      UserWarning,
      stacklevel=1,
    )
    return

  if result.returncode != 0:
    pytest.fail(f'npm run refresh-all exited {result.returncode}\n' + output)

  after = {p: p.read_text() if p.exists() else None for p in (airbnb_env, booking_env)}
  if not any(after[p] != before[p] for p in (airbnb_env, booking_env)):
    warnings.warn(
      'refresh-all exited 0 but neither airbnb.env nor booking.env changed.',
      UserWarning,
      stacklevel=1,
    )
    return

  try:
    from room_cal.service_api import ServiceAPI
    api = ServiceAPI()
    asyncio.run(api.get_prices(date.today() + timedelta(days=1)))
  except ServiceAuthError as exc:
    warnings.warn(
      f'Cookies were updated but API auth failed ({exc}); session may be invalid.',
      UserWarning,
      stacklevel=1,
    )