import logging
import asyncio
from typing import Optional, List, Dict
try:
    # Try local import first (when running as app.main)
    from .grok.grok import Grok
except ImportError:
    try:
        # Try absolute import (if running differently)
        from app.grok.grok import Grok
    except ImportError:
        Grok = None

logger = logging.getLogger(__name__)

class GrokChatClient:
    def __init__(self):
        self.client = None
        if Grok:
            try:
                self.client = Grok()
                logger.info("Grok API client initialized safely")
            except Exception as e:
                logger.error(f"Failed to initialize Grok client: {e}")
        else:
            logger.warning("grok-api library not found. Please install git+https://github.com/realasfngl/Grok-Api.git")

    async def chat(self, message: str, history: List[Dict[str, str]] = None, cookies: Dict[str, str] = None, user_agent: str = None) -> str:
        """
        Send a chat message to Grok.
        """
        if not self.client:
            return "Error: Grok API not installed or initialized."

        try:
            # Apply user-provided cookies and UA
            if cookies:
                try:
                    self.client.session.cookies.update(cookies)
                except Exception as e:
                    logger.warning(f"Failed to update cookies: {e}")
            
            if user_agent:
                # Override the User-Agent header in the session
                self.client.session.headers["User-Agent"] = user_agent
                # Also set in the client's internal headers object if present
                if hasattr(self.client, 'headers'):
                    if hasattr(self.client.headers, 'LOAD'):
                        self.client.headers.LOAD["User-Agent"] = user_agent
                    if hasattr(self.client.headers, 'C_REQUEST'):
                         self.client.headers.C_REQUEST["User-Agent"] = user_agent

            # Use start_convo (sync method)
            try:
                result = await asyncio.to_thread(self.client.start_convo, message)
            except Exception as e:
                # If we catch inside the thread, it returns dict with error
                raise e

            if isinstance(result, dict):
                if "error" in result:
                    error_msg = result["error"]
                    # If we have cookies, we've already tried them.
                    # We can fallback to browser auth ONLY if no cookies were provided
                    # OR if the user wants us to try anyway.
                    
                    if not cookies: 
                        logger.warning(f"Grok request failed: {error_msg}. Attempting browser auth bypass...")
                        
                        # Try to get cookies via browser
                        from .grok_auth import get_grok_cookies
                        browser_cookies = await get_grok_cookies()
                        
                        if browser_cookies:
                            logger.info("Got cookies from browser, applying to Grok client...")
                            self.client.session.cookies.update(browser_cookies)
                            
                            # Retry the request
                            result = await asyncio.to_thread(self.client.start_convo, message)
                            if isinstance(result, dict) and "error" in result:
                                 raise Exception(f"Retry failed: {result['error']}")
                        else:
                            raise Exception(f"Browser auth failed, original error: {error_msg}")
                    else:
                        # If cookies were provided but failed, trust the error
                        logger.warning(f"User-provided cookies failed: {error_msg}")
                        raise Exception(f"Grok Error: {error_msg} (Check your cookies)")

                return result.get("response", "No response from Grok.")
            return str(result)

        except Exception as e:
            import traceback
            error_trace = traceback.format_exc()
            logger.error(f"Grok Chat Error: {e}\n{error_trace}")
            with open("error.log", "a") as f:
                f.write(f"\nFAILED GROK REQUEST: {e}\n{error_trace}")
            return f"Error communicating with Grok: {str(e)}"