# retoor <retoor@molodetz.nl>
import re
from urllib.parse import unquote

import httpx

from molodetz import config
from molodetz.database import get_setting
from molodetz.curl_transport import CURL_AVAILABLE, CurlImpersonationTransport
from molodetz.net_guard import GuardedTransport

BROWSER_ALIGNED_HEADERS = {
    "user-agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36",
    "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
    "accept-language": "en-GB,en;q=0.9",
}

CONSENT_MARKERS = ("consent", "privacy-gate", "cookiewall")
CONSENT_REDIRECT = re.compile(r"""(?:window\.)?location(?:\.href)?\s*=\s*decodeURIComponent\(\s*['"]([^'"]+)['"]""")


def configured_proxy():
    try:
        value = get_setting("outbound_proxy_url", "")
    except Exception:
        value = ""
    return value or config.OUTBOUND_PROXY_URL or None


def _async_transport(proxy, timeout):
    if CURL_AVAILABLE:
        return CurlImpersonationTransport(proxy=proxy, timeout=timeout)
    return httpx.AsyncHTTPTransport(http2=True, proxy=proxy, retries=1)


def stealth_async_client(proxy=None, timeout=30.0, **kwargs):
    proxy = proxy if proxy is not None else configured_proxy()
    transport = _async_transport(proxy, timeout)
    headers = None if CURL_AVAILABLE else BROWSER_ALIGNED_HEADERS
    return httpx.AsyncClient(transport=transport, timeout=timeout, headers=headers, follow_redirects=True, **kwargs)


def stealth_sync_client(proxy=None, timeout=30.0, **kwargs):
    proxy = proxy if proxy is not None else configured_proxy()
    return httpx.Client(http2=True, proxy=proxy, timeout=timeout, headers=BROWSER_ALIGNED_HEADERS, follow_redirects=True, **kwargs)


def guarded_async_client(proxy=None, timeout=20.0, **kwargs):
    proxy = proxy if proxy is not None else configured_proxy()
    transport = GuardedTransport(_async_transport(proxy, timeout))
    headers = None if CURL_AVAILABLE else BROWSER_ALIGNED_HEADERS
    return httpx.AsyncClient(transport=transport, timeout=timeout, headers=headers, follow_redirects=True, max_redirects=5, **kwargs)


def detect_consent_gate(html):
    lowered = (html or "").lower()
    if not any(marker in lowered for marker in CONSENT_MARKERS):
        return None
    match = CONSENT_REDIRECT.search(html)
    if not match:
        return None
    return unquote(match.group(1))