"""
Twitter/X Profile Data Service for NordaBiz
============================================

Fetches Twitter profile data using Twitter's public GraphQL API
with guest token authentication. No paid API key required.

Note: This uses Twitter's internal API with guest tokens.
Rate limits apply (~50 requests per 15 minutes per IP).

Author: Maciej Pienczyn, InPi sp. z o.o.
Created: 2026-03-12
"""

import re
import logging
from typing import Optional, Dict

import requests

logger = logging.getLogger(__name__)

# Twitter's public bearer token (embedded in twitter.com JavaScript bundle)
_BEARER_TOKEN = (
    "AAAAAAAAAAAAAAAAAAAAANRILgAAAAAAnNwIzUejRCOuH5E6I8xnZz4puTs"
    "%3D1Zv7ttfk8LF81IUq16cHjhLTvJu4FA33AGWWjCpTnA"
)

_GRAPHQL_USER_BY_SCREEN_NAME = (
    "https://twitter.com/i/api/graphql/xc8f1g7BYqr6VTzTbvNlGw/UserByScreenName"
)

_GRAPHQL_FEATURES = {
    "hidden_profile_subscriptions_enabled": True,
    "responsive_web_graphql_exclude_directive_enabled": True,
    "verified_phone_label_enabled": False,
    "responsive_web_graphql_skip_user_profile_image_extensions_enabled": False,
    "responsive_web_graphql_timeline_navigation_enabled": True,
}


class TwitterService:
    """Fetches Twitter/X profile data via guest token + GraphQL API."""

    def __init__(self):
        self.session = requests.Session()
        self.session.headers.update({
            "User-Agent": (
                "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) "
                "AppleWebKit/537.36 (KHTML, like Gecko) "
                "Chrome/131.0.0.0 Safari/537.36"
            ),
            "Authorization": f"Bearer {_BEARER_TOKEN}",
        })
        self._guest_token = None

    def _ensure_guest_token(self) -> bool:
        """Obtain a guest token from Twitter. Returns True on success."""
        if self._guest_token:
            return True
        try:
            resp = self.session.post(
                "https://api.twitter.com/1.1/guest/activate.json",
                timeout=10,
            )
            resp.raise_for_status()
            self._guest_token = resp.json().get("guest_token")
            if self._guest_token:
                self.session.headers["x-guest-token"] = self._guest_token
                return True
            logger.warning("Twitter guest token response missing token")
            return False
        except requests.RequestException as e:
            logger.warning(f"Failed to get Twitter guest token: {e}")
            return False

    def _invalidate_guest_token(self):
        """Force re-acquisition of guest token on next request."""
        self._guest_token = None
        self.session.headers.pop("x-guest-token", None)

    @staticmethod
    def extract_username_from_url(url: str) -> Optional[str]:
        """Extract Twitter username from URL.

        Supported:
          - x.com/username
          - twitter.com/username
          - x.com/username/status/...
        """
        if not url:
            return None
        match = re.search(
            r'(?:twitter\.com|x\.com)/([A-Za-z0-9_]+)(?:/|$|\?)', url
        )
        if match:
            username = match.group(1)
            # Exclude non-profile paths
            if username.lower() in (
                'i', 'home', 'explore', 'search', 'settings',
                'notifications', 'messages', 'hashtag',
            ):
                return None
            return username
        return None

    def get_profile(self, username: str) -> Optional[Dict]:
        """Fetch Twitter profile data via GraphQL API.

        Args:
            username: Twitter screen name (without @)

        Returns:
            Dict with profile data or None on error:
            {
                'username': str,
                'name': str,
                'description': str,
                'followers_count': int,
                'following_count': int,
                'tweet_count': int,
                'listed_count': int,
                'media_count': int,
                'favourites_count': int,
                'location': str,
                'created_at': str,
                'profile_image_url': str,
                'profile_banner_url': str,
                'verified': bool,
                'protected': bool,
                'url': str,
            }
        """
        if not username:
            return None

        import json

        for attempt in range(2):
            if not self._ensure_guest_token():
                return None

            try:
                variables = json.dumps({
                    "screen_name": username,
                    "withSafetyModeUserFields": True,
                })
                features = json.dumps(_GRAPHQL_FEATURES)

                resp = self.session.get(
                    _GRAPHQL_USER_BY_SCREEN_NAME,
                    params={"variables": variables, "features": features},
                    timeout=15,
                )

                if resp.status_code == 403:
                    # Guest token expired, retry with new one
                    self._invalidate_guest_token()
                    continue

                if resp.status_code == 429:
                    logger.warning("Twitter API rate limited")
                    return None

                resp.raise_for_status()
                data = resp.json()

                result_data = (
                    data.get("data", {})
                    .get("user", {})
                    .get("result", {})
                )

                if result_data.get("__typename") == "UserUnavailable":
                    logger.info(f"Twitter user @{username} unavailable/suspended")
                    return None

                legacy = result_data.get("legacy", {})
                if not legacy:
                    logger.warning(f"No legacy data for @{username}")
                    return None

                # High-res profile image (remove _normal suffix)
                profile_img = legacy.get("profile_image_url_https", "")
                profile_img_hq = re.sub(r"_normal(\.\w+)$", r"\1", profile_img)

                profile = {
                    "username": legacy.get("screen_name", username),
                    "name": legacy.get("name", ""),
                    "description": legacy.get("description", ""),
                    "followers_count": legacy.get("followers_count", 0),
                    "following_count": legacy.get("friends_count", 0),
                    "tweet_count": legacy.get("statuses_count", 0),
                    "listed_count": legacy.get("listed_count", 0),
                    "media_count": legacy.get("media_count", 0),
                    "favourites_count": legacy.get("favourites_count", 0),
                    "location": legacy.get("location", ""),
                    "created_at": legacy.get("created_at", ""),
                    "profile_image_url": profile_img_hq,
                    "profile_banner_url": legacy.get("profile_banner_url", ""),
                    "verified": legacy.get("verified", False),
                    "protected": legacy.get("protected", False),
                    "url": legacy.get("url", ""),
                }

                logger.info(
                    f"Fetched Twitter profile @{username}: "
                    f"{profile['followers_count']} followers, "
                    f"{profile['tweet_count']} tweets"
                )
                return profile

            except requests.RequestException as e:
                logger.warning(f"Twitter API request error for @{username}: {e}")
                return None
            except (KeyError, ValueError, TypeError) as e:
                logger.warning(f"Twitter API parse error for @{username}: {e}")
                return None

        logger.warning(f"Twitter API failed for @{username} after retries")
        return None