from monitor.services.email_service import EmailService


@shared_task
def send_event_notification_task(analysis_id):
    """Send email notification for a market event."""
    try:
        from monitor.models import MarketAnalysis
        
        analysis = MarketAnalysis.objects.get(id=analysis_id)
        
        if analysis.is_event:
            email_service = EmailService()
            email_service.send_event_alert(analysis)
            
            logger.info(f"Event notification sent for analysis {analysis_id}")
            return {'success': True, 'analysis_id': analysis_id}
        else:
            logger.info(f"Analysis {analysis_id} is not an event, skipping notification")
            return {'success': False, 'reason': 'Not an event'}
            
    except MarketAnalysis.DoesNotExist:
        logger.error(f"Analysis {analysis_id} not found")
        return {'success': False, 'error': 'Analysis not found'}
    except Exception as e:
        logger.error(f"Error sending event notification: {e}")
        return {'success': False, 'error': str(e)}


@shared_task
def send_daily_digest_task():
    """Send daily digest email at 8 AM."""
    try:
        email_service = EmailService()
        email_service.send_daily_digest()
        
        logger.info("Daily digest email sent")
        return {'success': True}
        
    except Exception as e:
        logger.error(f"Error sending daily digest: {e}")
        # Try to send system alert about the failure
        send_system_notification_task.delay(
            alert_title="Daily Digest Failed",
            alert_message=f"Failed to send daily digest: {str(e)}",
            severity='error'
        )
        return {'success': False, 'error': str(e)}


@shared_task
def send_system_notification_task(alert_title, alert_message, severity='warning', 
                                affected_component='system'):
    """Send system notification email."""
    try:
        email_service = EmailService()
        email_service.send_system_alert(
            alert_title=alert_title,
            alert_message=alert_message,
            severity=severity,
            affected_component=affected_component
        )
        
        logger.info(f"System notification sent: {alert_title}")
        return {'success': True}
        
    except Exception as e:
        logger.error(f"Error sending system notification: {e}")
        return {'success': False, 'error': str(e)}


# Update the fetch_bitcoin_price_task to send system alerts on failure
@shared_task(bind=True, max_retries=3)
def fetch_bitcoin_price_task(self):
    """Fetch current Bitcoin price and save to database."""
    logger.info("Starting Bitcoin price fetch task...")
    
    try:
        fetcher = CoinGeckoFetcher()
        
        # Fetch current price
        price_data = fetcher.fetch_current_price()
        
        if not price_data:
            logger.error("Failed to fetch price data")
            
            # Send system alert
            send_system_notification_task.delay(
                alert_title="Bitcoin Price Fetch Failed",
                alert_message="Failed to fetch Bitcoin price from CoinGecko API. Check API status and internet connection.",
                severity='warning',
                affected_component='data_fetcher'
            )
            
            raise Exception("No price data received")
        
        # ... rest of existing code ...
        
    except Exception as e:
        logger.error(f"Error in fetch_bitcoin_price_task: {e}")
        
        # Update system status with error
        SystemStatus.objects.create(
            last_error=str(e),
            is_stale=True,
            is_healthy=False,
        )
        
        # Send system alert
        send_system_notification_task.delay(
            alert_title="Bitcoin Price Task Error",
            alert_message=f"Error in price fetch task: {str(e)}",
            severity='error',
            affected_component='celery_task'
        )
        
        # Retry the task
        self.retry(exc=e, countdown=60)
        
        return {
            'success': False,
            'error': str(e),
        }


# Update run_hourly_analysis_task to send event notifications
@shared_task
def run_hourly_analysis_task():
    """Run hourly market analysis."""
    logger.info("Starting hourly analysis task...")
    
    try:
        analyzer = MarketAnalyzer(threshold_percent=15.0)
        
        # Run hourly analysis
        analysis = analyzer.analyze_market('hourly')
        
        if analysis:
            logger.info(f"Hourly analysis completed: {analysis.status} at ${analysis.current_price}")
            
            # Check if this is an event and send notification
            if analysis.is_event:
                logger.warning(
                    f"Market event detected: {analysis.event_type} "
                    f"at ${analysis.current_price}"
                )
                
                # Send email notification
                send_event_notification_task.delay(analysis.id)
            
            return {
                'success': True,
                'analysis_id': analysis.id,
                'status': analysis.status,
                'price': float(analysis.current_price),
                'is_event': analysis.is_event,
            }
        else:
            logger.warning("Hourly analysis returned no results")
            return {'success': False, 'error': 'No analysis results'}
            
    except Exception as e:
        logger.error(f"Error in run_hourly_analysis_task: {e}")
        
        # Send system alert
        send_system_notification_task.delay(
            alert_title="Hourly Analysis Failed",
            alert_message=f"Failed to run hourly analysis: {str(e)}",
            severity='error',
            affected_component='market_analyzer'
        )
        
        return {'success': False, 'error': str(e)}